SPECTRASITE HOLDINGS INC
10-K, 2000-03-02
COMMUNICATIONS SERVICES, NEC
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<PAGE>   1
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   FORM 10-K

(MARK ONE)

[ X ] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
      ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 1999
                                       OR
[ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM __________ TO
      __________

                         COMMISSION FILE NUMBER 0-27217

                           SPECTRASITE HOLDINGS, INC.
             (Exact name of registrant as specified in its charter)

<TABLE>
<CAPTION>
                         DELAWARE                                                  56-2027322
<S>                                                                  <C>
     (State or other jurisdiction of incorporation or                 (I.R.S. Employer Identification No.)
                      organization)

           100 REGENCY FOREST DRIVE, SUITE 400                                       27511
                   CARY, NORTH CAROLINA                                            (Zip Code)
         (Address of principal executive offices)

</TABLE>

                                 (919) 468-0112
              (Registrant's telephone number, including area code)

          SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:
                                      NONE

          SECURITIES REGISTERED PURSUANT TO SECTION 12 (g) OF THE ACT:
                         Common Stock, $.001 par value

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.   Yes [X]  No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendments to
this Form 10-K. [ ]

As of February 29, 2000, the aggregate market value of the Common Stock held by
non-affiliates of the registrant was $1,251,354,811 based on the closing price
on the Nasdaq National Market on such date.

There were 122,763,494 shares of Common Stock outstanding as of February 29,
2000.

                      DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Proxy Statement for the 2000 Annual Meeting of Stockholders are
incorporated by reference into Part III.


<PAGE>   2

<TABLE>
<CAPTION>
                           SPECTRASITE HOLDINGS, INC.
                          1999 FORM 10-K ANNUAL REPORT
                               TABLE OF CONTENTS
                                                                                                         PAGE
                                                                                                         ----
                                     PART I
<S>               <C>                                                                                    <C>
Item 1.           Business..............................................................................   1
Item 2.           Properties............................................................................   10
Item 3.           Legal Proceedings.....................................................................   11
Item 4.           Submission of Matters to a Vote of Security Holders...................................   12

                                     PART II

Item 5.           Market for Registrant's Common Equity and Related Stockholder Matters.................   12
Item 6.           Selected Consolidated Financial Data..................................................   13
Item 7.           Management's Discussion and Analysis of Financial Condition and Results of
                  Operations............................................................................   15
Item 7A.          Quantitative and Qualitative Disclosures about Market Risk............................   22
Item 8.           Consolidated Financial Statements and Supplementary Data..............................   23
Item 9.           Changes in and Disagreements with Accountants on Accounting and Financial
                  Disclosure............................................................................   23

                                    PART III

Item 10.          Directors and Executive Officers of the Registrant....................................   23
Item 11.          Executive Compensation................................................................   24
Item 12.          Security Ownership of Certain Beneficial Owners and Management........................   25
Item 13.          Certain Relationships and Related Transactions........................................   25

                                    PART IV

Item 14.          Exhibits, Financial Statement Schedules and Reports on Form 8-K.......................   25
</TABLE>



                                      i
<PAGE>   3
               SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

    This report contains forward-looking statements within the meaning of
Section 27A of the Securities Act of 1933 and Section 21C of the Securities
Exchange Act of 1934, including statements concerning possible or assumed
future results of operations of SpectraSite and those preceded by, followed by
or that include the words may, will, should, could, expects, plans,
anticipates, believes, estimates, predicts, potential or continue or the
negative of such terms and other comparable terminology. You should understand
that the factors described below, in addition to those discussed elsewhere in
this report, could affect our future results and could cause those results to
differ materially from those expressed in such forward-looking statements.
These factors include:

        -   material adverse changes in economic conditions in the markets we
            serve;
        -   future regulatory actions and conditions in our operating areas;
        -   competition from others in the communications tower industry;
        -   the integration of our operations with those of businesses we have
            acquired or may acquire in the future and the realization of the
            expected benefits; and
        -   other risks and uncertainties as may be detailed from time to time
            in our public announcements and SEC filings.

                                       ii

<PAGE>   4
                                    PART I

ITEM 1.       BUSINESS

OVERVIEW

     We are one of the leading providers of outsourced antennae site and network
services to the wireless communications and broadcast industries in the United
States and Canada. Our businesses include the ownership and leasing of antennae
sites on towers, managing rooftop and in-building telecommunications access on
commercial real estate, network planning and deployment and construction of
towers and related wireless facilities. Our customers are leading wireless
communications providers and broadcasters, including Nextel, Sprint PCS, AT&T
Wireless, VoiceStream Communications, Tritel Communications, Teligent, WinStar,
Cox Broadcasting, Clear Channel Communications and Paxson Communications. As of
December 31, 1999, and after giving effect to our acquisition of Apex Site
Management Holdings, Inc., we owned or managed over 15,000 sites, including
2,765 owned towers, in 98 of the top 100 markets in the United States. On
February 17, 2000, we agreed to acquire leasehold or subleasehold interests in
430 communications towers from AirTouch.

     The wireless communications industry is growing rapidly and carriers are
making large capital investments to expand their networks. We believe that the
number of wireless communications sites, including towers, is likely to continue
to increase together with the growth in demand for wireless services. This
expected growth in communications sites is the result of several factors,
including:

      --   the continuing build-out of higher frequency technologies, such as
           personal communications services, which have a reduced cell range and
           require a more concentrated network of towers than previous wireless
           technologies;

      --   the need to expand the capacity of existing networks;

      --   the issuance of new wireless network licenses requiring the
           construction of new wireless networks; and

      --   the emergence of new wireless technologies.

     As carriers deploy these networks, they are faced with a proliferation in
both the number and type of competitors. Because of this increasingly
competitive environment, carriers must also focus on satisfying customer demand
for enhanced services, seamless and comprehensive coverage, better call quality,
faster data transmission and lower prices.

     We believe that as carriers face the increased challenges of expanding
their networks and improving their services, they must allocate their available
capital and resources in the most efficient manner. In particular, carriers are
increasingly outsourcing tower ownership, as well as network planning deployment
and management to independent tower owners like SpectraSite. This outsourcing
allows our customers to focus on their core competencies and to rely on us for
planning and deploying their networks. Our services are designed to improve our
customers' competitive positions through the efficient planning, deployment and
management of their networks.

GROWTH STRATEGY

     Our objective is to be the leading independent provider of outsourced
antennae site and network services to the telecommunications and broadcast
industries. Our growth strategy involves the following key elements:

     MAXIMIZING THE UTILIZATION OF OUR TOWERS AND MANAGED SITES

     We intend to capitalize on the substantial opportunities for revenue and
cash flow growth by maximizing the number of tenants we have on each of our
towers and managed sites. We believe that our strategy of owning clustered
groups of towers and managed sites in major metropolitan markets and providing
our customers with a full range of products and services allows us to deliver
reliable, scalable network solutions and will result in increased co-location on
our towers and managed sites. Since most tower costs are fixed, leasing
available space on an existing tower results in minimal additional expenses
while generating a larger percentage increase in tower cash flow. In addition,
tenant turnover is low because of the relatively high cost of

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antenna relocation. We generally construct towers to accommodate at least three
broadband tenants and have a dedicated sales force which markets co-location
opportunities to wireless communications providers. Our objective is to use our
national tower presence to enable wireless service providers to more quickly
establish wireless coverage in individual and multiple markets.

     EXPANDING OUR TOWER PORTFOLIO

     We seek to expand our tower portfolio by building new towers for anchor
tenants and by making selective acquisitions of towers. We believe that Nextel's
agreement to lease space on an additional 1,422 towers we own, acquire or
construct for Nextel or other tenants will substantially increase the number of
towers we own and operate. We also continue to pursue attractive network
development opportunities with other wireless service providers. In addition, we
evaluate other tower development opportunities from time to time which we
believe have higher than average co-location opportunities. We intend to
continue to make selective acquisitions in the highly fragmented tower owner and
operator industry. Our strategy is to acquire towers that have some, or all, of
the following criteria:

      --   underutilized with additional co-location potential;

      --   favorably located, either individually or in clusters, in large urban
           areas and along major transportation corridors; and

      --   complementary to our existing coverage areas.

     We believe there are tower acquisition opportunities currently available
from both wireless service providers and smaller independent tower operators.
Furthermore, we believe that the number of tower opportunities available in the
future is likely to grow as large wireless communications service providers and
smaller independent tower companies continue to divest their tower holdings. We
regularly evaluate acquisition opportunities, engage in negotiations and submit
bids with respect to acquisitions of individual towers, groups of towers and
entities that own or manage towers and related businesses. In addition to our
acquisition of 2,000 towers from Nextel in April 1999, we continue to seek
partnerships and other strategic arrangements with other major wireless
communications carriers in order to assume ownership of their towers.

     EXPANDING THE SUITE OF SERVICES WE OFFER AND PURSUING CROSS-SELLING
OPPORTUNITIES

     We believe our ability to provide a package of integrated services, which
have traditionally been offered by multiple subcontractors coordinated by a
carrier's deployment staff, will make us a preferred provider of all outsourced
antennae site and network services. For example, we believe that our leadership
in rooftop and in-building access will give us an advantage across all of our
product offerings as fixed wireless carriers expand their networks and as
wireless telephone and data companies increasingly focus on network deployment
and in-building service. In addition, our leadership in broadcast tower design,
fabrication and construction will give us a competitive advantage as
broadcasters increasingly outsource tower and facilities ownership and
management.

PRODUCTS AND SERVICES

     WIRELESS TOWER OWNERSHIP AND LEASING

     We are one of the largest independent owners and operators of wireless
communications towers in the United States and Canada. We provide antennae site
leasing services, which primarily involve the leasing of antennae space on our
communications towers to wireless carriers. Each of our towers has an anchor
tenant, and we seek to add several co-location tenants over time. In leasing
antennae space, we generally receive monthly lease payments from customers. Our
customer leases typically have original terms of five years, with four or five
renewal periods of five years each, and usually provide for periodic price
increases. Monthly lease pricing varies with the number and type of antennae
installed on a communications site.

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<PAGE>   6

     The following chart shows the locations of our owned towers as of December
31, 1999:

<TABLE>
<CAPTION>
                          NUMBER
STATE                    OF TOWERS
- -----                    ---------
<S>                      <C>
California...........        408
Florida..............        186
Michigan.............        168
Ohio.................        166
Texas................        165
Illinois.............        155
Georgia..............        154
North Carolina.......        130
Louisiana............         99
Alabama..............         94
Washington...........         88
Wisconsin............         85
Tennessee............         81
Missouri.............         62
Indiana..............         55
Mississippi..........         54
Pennsylvania.........         52
South Carolina.......         52
Arizona..............         48
Massachusetts........         44
Oregon...............         43
Oklahoma.............         39
Nevada...............         38
Maryland.............         35
Colorado.............         33
New Mexico...........         30
Minnesota............         25
Utah.................         23
New Jersey...........         19
Virginia.............         18
Kansas...............         17
New York.............         16
Iowa.................         14
Alberta..............         13
Other................         56
                           -----
Total................      2,765
                           =====
</TABLE>

     In addition to towers we build for Nextel under the master site commitment
agreement and towers we selectively build and acquire, we also expect to expand
our tower portfolio through build-to-suit programs. Under build-to-suit
programs, we utilize our network development capabilities to construct tower
networks after having signed an antenna site lease agreement with an anchor
tenant and having made the determination that the initial or planned capital
investment for that tower network would not exceed a targeted multiple of tower
cash flow after a certain period of time.

     In addition to leasing antenna space, we also provide maintenance and
management services at our communication sites. In providing these services to
our customers we use a combination of in-house personnel and independent
contractors. In-house personnel are responsible for oversight and supervision of
all aspects of site maintenance and management and are particularly responsible
for monitoring, security, access and lighting, radio frequency emission and
interference issues, signage, structural engineering and tower capacity, tenant
relations and supervision of independent contractors. We hire local independent
contractors to perform routine maintenance functions, such as landscaping, pest
control, snow removal and site access.

     WIRELESS ROOFTOP AND IN-BUILDING ACCESS

     We are the largest independent provider of rooftop and in-building access
services in the United States. We are the exclusive site manager for
approximately 12,700 diverse real estate properties, with significant access
clusters in New York, Philadelphia, Baltimore/Washington, D.C., Atlanta, New
England, Florida, Western Pennsylvania/Ohio/Indiana, Chicago, Seattle, Southern
California, Texas and St. Louis. A principal attraction of this portion of our
business is the opportunity to develop new sources of revenue and value for
building owners by managing:

      --   rooftops for transmitting and receiving installations; and

      --   rooftops, risers and internal telecommunications equipment space for
           competitive voice, data and Internet services offered to in-building
           tenants.

                                      3

<PAGE>   7
     Wireless communications carriers utilize our managed sites as transmitting
locations, often where there are no existing towers for co-location or where new
towers are difficult to build. Our transmitting tenants encompass a broad array
of wireless communications providers, including personal communications service,
cellular, enhanced specialized mobile radio, specialized mobile radio, wireless
data, two-way radio, microwave, wireless cable and paging companies. As the
largest rooftop and in-building access manager in the United States, we provide
services to the facilities-based (wired and wireless) competitive local exchange
carrier and Internet service provider market. We have executed agreements
allowing these carriers access to over 3,000 properties, including agreements
with national providers such as Adelphia Business Solutions, AT&T Local
Services, Eureka Broadband, NEXTLINK, Site Line, Teligent and WinStar, as well
as numerous regional carriers. These access agreements are, to date,
predominantly for office and industrial properties.

     Our managed portfolio contains over 3,300 office and industrial properties
encompassing over 375 million square feet. We are engaged by ten of the top
nineteen office real estate investment trusts, based on market capitalization,
in the United States, according to the National Association of Real Estate
Investment Trusts. In most cases, multiple carriers will access a single
property. Our management contracts are generally for a period of three to five
years, and contain renewal periods unless terminated by either party before
renewal or upon an uncured default. Under these contracts, we are engaged as the
exclusive site manager for rooftop management. In most cases, we are also
engaged as the exclusive manager for riser and telecommunications access
management. As the site manager, we are responsible for marketing the properties
as part of our portfolio of potential telecommunications sites, reviewing
existing license agreements, negotiating new license agreements, managing and
enforcing those agreements, supervising installation of equipment by carriers to
ensure, among other things, non-interference with other users, as well as site
billing, collections and contract administration. For these services, we receive
a percentage of occupancy fees, which is higher for the new carriers we add than
for existing carriers. Upon any termination of a contract, unless due to our
default, we are entitled to continue to receive our percentage with respect to
carriers added during the term of our management agreement for so long as they
remain tenants.

     NETWORK DESIGN AND DEPLOYMENT SERVICES

     We are a leading provider of design and deployment services for wireless
networks. These services include architectural and engineering design, tower
construction, line and antenna installation and site acquisition services. We
offer these services individually and as an integrated package. We believe that
we have a competitive advantage in our ability to provide comprehensive network
development services by eliminating our customers' need to seek services from
different providers.

     In providing these network design and deployment services, we have
developed the capability to effectively manage multiple site acquisition and
tower development projects in various locations at the same time. Where
appropriate, we supplement our in-house expertise with a pre-qualified pool of
local contractors and advisors. In addition, we have developed detailed and
standardized site acquisition and construction specifications and procedures
that allow us to rapidly construct tower networks. Wireless carriers require
aggressive network build-out schedules, and uniform procedures and
specifications allow for reduced employee training time, improved vendor
performance and quicker identification of potential tower sites.

     Architectural and Engineering Design.  Our architecture and engineering
team manages a complex array of electrical, structural and architectural
elements while interfacing with our clients and construction crews to ensure
that site-specific objectives are reflected in construction documents. Our
structural engineering and design abilities enable us to construct towers that
have maximum antenna site capacity based on the physical features of the land on
which the tower is constructed and the demand in the market in which the tower
is located. We seek to design aesthetically acceptable sites and construct
towers with minimal environmental impact. Our custom structure design abilities
combined with our engineering skills also allow us to build towers in
geographically difficult locations at competitive prices. We believe that this
specialty service will enable us to compete effectively in regions in which
other companies are not able to participate on a cost-efficient basis.

     Tower Construction.  Our engineering, general contracting, electrical,
structural steel and other specialty licenses allow us to perform services
required to design, develop and construct communications towers. Our ability to
perform civil and electrical engineering as well as tower construction enables
us to expedite and simplify this phase of development by minimizing the need to
subcontract.

     During tower construction, a project team of five to seven people is
dispatched to the site. A temporary field office is established at the site. The
project team is typically composed of our permanent employees, but may be
supplemented with local hires.

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<PAGE>   8

     We use our information technology abilities to create construction models,
development budgets, critical path schedules and status reports covering
schedules and costs throughout the course of a project. Our civil engineering
capability allows us to prepare the construction site by leveling the land,
removing vegetation and installing access roads as needed. Based on the results
of soil tests that we conduct at each site, we design and build the tower
foundation. After the foundation is in place, we erect the tower. We utilize our
structural engineering capability by constructing a tower designed for maximum
antenna capacity.

     Line and Antenna Installation.  After erecting the tower and placing the
equipment shelter, we install the antennae and feed lines, including the sweep,
test and orientation. Depending on the project, electricity is installed either
during the erection process to conform with the FAA lighting requirements or
after the tower has been constructed. Our technical crews are regularly trained
in cellular, microwave, fiber optic and direct current power plant system
installation and testing methods. We are also a leader in designing and
implementing in-building wireless systems, as well as a broad range of cellular
and personal communications services repeater systems. Our test equipment and
dedicated radio frequency testing teams allow us to monitor and maintain system
integrity and quality control.

     We also offer the ability to construct the switch facility that controls an
antenna's communications with other communications sites. Although switch
construction is not performed at every project site, it is an additional
specialty service we provide.

     After constructing the tower, placing the equipment shelter and completing
the antenna work, we install grounding lines and protective fencing around the
site. We then perform final grounding and landscaping as necessary to complete
the project.

     Site Acquisition Services.  We offer a full range of site acquisition
services, including network pre-design, communication site selection,
communication site acquisition and local zoning and permitting. We offer these
services through local contractors who have knowledge and expertise in the
specific geographic area.

     BROADCAST TOWER DEVELOPMENT AND LEASING

     We are a leading provider of broadcast tower analysis, design, fabrication,
installation, and technical services. We have over 50 years of experience in the
broadcast tower industry and have worked on the development of more than 700
broadcast towers, which we believe represent approximately 50% of the existing
broadcast tower infrastructure in the United States. Our broadcast tower group
extends our core business of outsourced wireless antenna sites to broadcast
towers. We intend to capitalize on our broadcast tower development expertise to
create tower ownership and leasing opportunities.

     In November 1999, Congress passed the Community Broadcasters Protection Act
of 1999, which directs the FCC to offer a new Class A status to qualifying low
power television stations. To qualify, Class A low power television stations,
which were required to notify the FCC of their eligibility by January 28, 2000,
will have to meet certain programming and operational criteria. Under the
statute, Class A low power television stations will not be protected from
interference from digital television stations proposing to maximize their DTV
service, provided the digital television stations notified the FCC of their
intent to maximize facilities no later than December 31, 1999, and the digital
television stations submit a maximization application by May 1, 2000. The FCC
must adopt rules to govern the new service by the end of March 2000, after which
qualifying Class A low power television stations will be required to file a
formal application. As part of a rulemaking which the FCC commenced earlier this
year, the agency will consider specific protection criteria to be applied in
evaluating Class A low power television station operations vis-a-vis full power
and other low power television stations. The standards that are adopted may
affect the ability of applicants for digital television facilities and
proponents of modified analog facilities to change their existing or future
proposals and may affect their current tower utilization plans.

     In 1996, the FCC mandated the conversion of analog television signals to
digital. The mandate specifies that by May 1, 2003, each television station in
the United States must complete construction of new digital broadcasting
facilities and, beginning April 21, 2003, must be simulcasting at least 50% of
its programming on


                                      5
<PAGE>   9

both its analog and digital facilities. This conversion creates significant
potential demand for co-location on broadcast towers.

     Broadcast towers require a high level of technical design and erection
expertise, as they reach heights of up to 2,000 feet. Broadcast towers support
extremely powerful television and FM radio signals over entire metropolitan
areas. The existing domestic broadcast tower infrastructure was generally
developed to accommodate individual broadcast signals. This broadcast tower
infrastructure was built primarily in the 1940's and 1950's. Today, it is
considered to be at capacity and somewhat antiquated. The FCC mandate creates
significant infrastructure deployment requirements and burdens for the broadcast
community in the United States. In addition, the engineering and construction
expertise for broadcast towers is limited to a relatively small number of
fabrication and construction companies that specialize in broadcast towers.

     Recognizing this opportunity to capitalize on the broadcast infrastructure
tower development and leasing requirement, we have developed a strategic plan
that is designed to position us as the leading tower resource in the broadcast
sector. We have identified the critical core competencies necessary to fulfill
broadcast industry requirements. We offer broadcast tower engineering,
fabrication and erection services. In addition, we have original tower design
specifications and considerable tower modification historical information on
approximately 50% of the existing broadcast tower infrastructure. We believe
that this intellectual property positions us as one of broadcasters' first
points of contact for any broadcast tower project.

CUSTOMERS

     Our primary customer currently is Nextel. On a pro forma basis after giving
effect to the Nextel acquisition, the Westower merger and certain other
transactions, Nextel represented approximately 29% of our revenues for the year
ended December 31, 1999.

     Nextel provides a wide array of digital wireless communications services
throughout the United States. Nextel offers a differentiated, integrated package
of digital wireless communications services under the Nextel brand name,
primarily to business users. Nextel's digital mobile network constitutes one of
the largest integrated wireless communications systems utilizing a single
transmission technology in the United States. Nextel has significant specialized
mobile radio spectrum holdings in and around every major business population
center in the country, including all of the top 50 metropolitan statistical
areas in the United States. Nextel files periodic reports and other information
with the SEC. For more information about Nextel, you should read Nextel's SEC
filings. However, we are not incorporating any of Nextel's SEC filings by
reference into this document.

     In addition, our customers also include several of the largest wireless
service providers in the United States, including AT&T Wireless and Sprint PCS.
We also have provided services to enhanced specialized mobile radio, specialized
mobile radio and cellular wireless providers. For the year ended December 31,
1997, Powertel, Sprint PCS, GTE Mobility, Intercel and Horizon accounted for
38.9%, 18.8%, 14.7%, 13.0% and 11.2%, respectively, of our revenues. For the
year ended December 31, 1998, Powertel and Tritel accounted for 46.6% and 24.3%,
respectively, of our revenues. For the year ended December 31, 1999, Nextel
accounted for 35.0% of our revenues. During this period, no other customer
accounted for more than 10% of SpectraSite's revenues.

SALES AND MARKETING

     We believe that our ability to satisfy a wide range of our customer's
network deployment requirements will make us a preferred provider of all
outsourced antennae site and network services. Our sales and marketing goals are
to:

      --   use existing relationships and develop new relationships with
           wireless service providers to lease antenna space on our owned and
           managed communication sites; and

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<PAGE>   10

      --   form affiliations with select communications system vendors who
           utilize end-to-end services, including those provided by SpectraSite,
           which will enable us to market our services and products through
           additional channels of distribution.

     Historically, we have capitalized on the strength of our experience,
performance and relationships with wireless service providers to obtain
build-to-suit projects, and we intend to continue to emphasize our capability in
these areas in selling our broad range of services.

     Maintaining and cultivating relationships with wireless service providers
is a main focus of senior management. In addition, we have a dedicated group of
representatives focused on sales efforts and establishing relationships with
wireless service providers. The representatives are assigned specific accounts
based on historical experience with a provider and the quality of the
relationship between the SpectraSite representative and such provider. Most
wireless service providers have national corporate headquarters with regional
offices. We believe that most decisions for site acquisition and site leasing
services are made by providers at the regional level with input from their
corporate headquarters. Our sales representatives work with provider
representatives at the local level and, when appropriate, at the national level.
Our sales staff compensation is heavily weighted to incentive-based goals and
measurements. In addition to our dedicated marketing and sales staff, we rely
upon our executive and operations personnel at the national and field office
levels to identify sales opportunities within existing customer accounts, as
well as acquisition opportunities.

COMPETITION

     Our principal competitors include American Tower Corporation, Crown Castle
International Corp., Pinnacle Holdings Inc. and SBA Communications Corporation.

     Towers are not the only kind of platform for radio transmitters. The FCC
has authorized numerous entities and is considering applications from many
others to provide fixed and mobile satellite services using various frequency
bands in a manner that may compete with terrestrial service providers. Iridium
LLC, for example, has commenced space-borne provision of mobile satellite
service, although it is currently subject to bankruptcy proceedings. Teledesic
plans to provide high-speed fixed satellite data services through low-earth-
orbit satellites. In 1997, the FCC allocated one gigahertz of spectrum in the 47
GHz band for any use consistent with the spectrum allocation table. The FCC has
decided to auction this spectrum in 200 MHz blocks for the provision of
communications services. It is unclear whether these new technologies will be
commercially feasible, and to what extent they will offer significant
competitive alternatives to terrestrial structures.

EMPLOYEES

     As of December 31, 1999, SpectraSite had 1,198 employees, none of whom are
represented by a collective bargaining agreement. We consider our employee
relations to be good. Due to the nature of the site construction business, we
may experience increases and decreases in employees as site construction
contracts are entered into or completed.

INTERNATIONAL

     Our primary focus is on operations in the United States and Canada.
However, we evaluate possible international opportunities and may, in the
future, pursue opportunities we consider attractive.

REGULATORY AND ENVIRONMENTAL MATTERS

     FEDERAL REGULATIONS

     Both the FCC and the FAA regulate towers used for wireless communications
transmitters and receivers. Such regulations control the siting, marking and
lighting of towers and may, depending on the characteristics of particular
towers, require registration of tower facilities. Wireless communications
antennae operating on towers are separately regulated and independently licensed
by the FCC based upon the particular frequency

                                      7
<PAGE>   11

being used and the service being provided. In addition to these regulations,
SpectraSite must comply with certain environmental laws and regulations.

     Under the requirements of the Communications Act of 1934, as amended, the
FCC, in conjunction with the FAA, has developed standards to consider proposals
for new or modified antennae structures. These standards mandate that the FCC
and the FAA consider the height of the proposed antenna structure, the
relationship of the structure to existing natural or man-made obstructions and
the proximity of the structure to runways and airports. Proposals to construct
or modify existing structures above certain heights or within certain proximity
to airports are reviewed by the FAA to ensure they will not present a hazard to
aviation. The FAA may condition its issuance of no-hazard determinations upon
compliance with specified lighting and marking requirements. The FCC will not
license the operation of wireless telecommunications antennae on towers unless
the tower has been registered with the FCC or a determination has been made that
such registration is not necessary. The FCC will not register a tower unless it
has received all necessary clearances from the FAA. The FCC also enforces
special lighting and painting requirements. Owners of towers on which wireless
communications antennae are located have an obligation to maintain painting and
lighting to conform to FCC standards. Tower owners may also bear the
responsibility of notifying the FAA of any tower lighting failures. SpectraSite
generally indemnifies its customers against any failure to comply with
applicable regulatory standards. Failure to comply with the applicable
requirements may lead to civil penalties and tort liability.

     In 1995, the FCC adopted regulations making the owners of towers, rather
than communications licensees, primarily responsible for compliance with antenna
structure painting and lighting requirements. These rule changes are based on
statutory amendments adopted by Congress in 1992 extending regulatory
jurisdiction to tower owners. Communications licensees are now secondarily
responsible for tower maintenance if the tower owners are unwilling or unable to
perform those duties. Currently, these requirements apply to antenna structures
that are more than 200 feet in height, or that may interfere with the approach
or departure space of a nearby airport runway.

     The regulatory requirements adopted in 1995 required tower owners, like
SpectraSite, to register existing structures by state, in accordance with filing
windows, over a two-year period between July 1, 1996 and June 30, 1998.
Historically, tower locations were determined using area maps. The FCC has
recognized that, with the proliferation of inexpensive, satellite-based locating
devices, such as Global Positioning System receivers, structures can now be
easily located with a higher degree of accuracy. Accordingly, the FCC has told
owners who determined that tower registration information conflicted with
previously issued licenses for antennae on their towers to register their
structures using the new data and to seek new FAA determinations of no hazard as
necessary under the FAA's rules. The FCC also has instructed licensees or
permittees who discovered that the coordinates on their authorizations differed
from those determined by more accurate means to submit corrective construction
permit applications. In February 1999, the FCC's Wireless Telecommunications
Bureau announced a new policy under which defective applications for wireless
authorizations and antenna structure registrations will be summarily dismissed,
without giving the applicants an opportunity to amend but requiring them to
correct and retender their applications. As part of the new policy, the Bureau
said that effective May 1, 1999, it will return and not process tower
registration applications including data that do not agree with information
listed on previously issued FAA determinations. The FCC also announced that
applications for FCC communications authorizations would be dismissed if a tower
registration number is not listed on the FCC application. Although the FCC
initially said the rule affecting communications applications would apply
beginning May 1, 1999, for applicants proposing antennae on existing structures,
and July 1, 1999, for applicants proposing to utilize new towers, the FCC in
late April 1999 extended these deadlines. For services, such as cellular,
paging, and personal communications services, which have already had their
records converted to the FCC's new Uniform Licensing System database, the new
tougher dismissal rule applied effective July 1, 1999. For other communications
services that have not yet been converted to the Uniform Licensing System, the
FCC said the new processing rules would go into effect six months after each
service's incorporation into the Uniform Licensing System. This new policy means
that for towers to be of use to FCC applicants, it will be necessary for tower
owners to notify the FAA and obtain FCC tower registrations well in advance of
the date tenants will be filing FCC applications.

                                      8
<PAGE>   12

     In December 1998, the FCC announced that a recent audit of existing antenna
structures revealed that over one quarter of the audited structures had not been
registered as required by the FCC's rules. In light of this finding and several
reported near misses of towers by aircraft, the FCC in January 1999 announced a
no-tolerance policy, requiring all owners of existing unregistered structures to
register them immediately or face monetary forfeitures or civil fines.
SpectraSite has been working to review the registration of the towers it has
acquired and to confirm the accuracy of the information submitted to the FAA and
the FCC by the prior owners.

     The Telecommunications Act of 1996 amended the Communications Act of 1934
by limiting state and local zoning authorities' jurisdiction over the
construction, modification and placement of wireless communications towers. The
new law preserves local zoning authority but prohibits any action that would
discriminate between different providers of wireless services or ban altogether
the construction, modification or placement of communications towers. The 1996
Telecom Act also requires the federal government to help licensees for wireless
communications services gain access to preferred sites for their facilities.
This may require that federal agencies and departments work directly with
licensees to make federal property available for tower facilities.

     STATE AND LOCAL REGULATIONS

     Most states regulate certain aspects of real estate acquisition and leasing
activities. Where required, SpectraSite conducts the site acquisition portions
of its site acquisition services business through licensed real estate brokers
or agents, who may be employees of SpectraSite or hired as independent
contractors. Local regulations include city and other local ordinances, zoning
restrictions and restrictive covenants imposed by community developers. These
regulations vary greatly, but typically require tower owners to obtain approval
from local officials or community standards organizations prior to tower
construction. Local zoning authorities generally have been hostile to
construction of new transmission towers in their communities because of the
height and visibility of the towers. Companies owning or seeking to build towers
have encountered an array of obstacles arising from state and local regulation
of tower site construction, including environmental assessments, fall radius
assessments, marketing/lighting requirements, and concerns with interference to
other electronic devices. The delays resulting from the administration of such
restrictions can last for several months, and when appeals are involved, can
take several years.

     ENVIRONMENTAL REGULATIONS

     Owners and operators of communications towers are subject to, and,
therefore, must comply with environmental laws. The FCC's decision to register a
proposed tower may be subject to environmental review under the National
Environmental Policy Act of 1969, which requires federal agencies to evaluate
the environmental impacts of their decisions under certain circumstances. The
FCC has issued regulations implementing the National Environmental Policy Act.
These regulations place responsibility on each applicant to investigate any
potential environmental effects of operations and to disclose any significant
effects on the environment in an environmental assessment prior to constructing
a tower. In the event the FCC determines the proposed tower would have a
significant environmental impact based on the standards the FCC has developed,
the FCC would be required to prepare an environmental impact statement. This
process could significantly delay the registration of a particular tower. In
addition, we are subject to environmental laws which may require investigation
and clean-up of any contamination at facilities we own or operate or at third-
party waste disposal sites. These laws could impose liability even if we did not
know of, or were not responsible for, the contamination. Although we believe
that we currently have no material liability under applicable environmental
laws, the costs of complying with existing or future environmental laws,
investigating and remediating any contaminated real property and resolving any
related liability could have a material adverse effect on our business,
financial condition or results of operations.

                                      9
<PAGE>   13

ITEM 2.  PROPERTIES


     SpectraSite is headquartered in Cary, North Carolina, where it currently
leases 62,136 square feet of space. We have established regional offices in the
Atlanta, Chicago and San Francisco areas. We open and close project offices from
time to time in connection with our network design and development services,
which offices are generally leased for periods not exceeding 18 months.

     We own a broadcast tower manufacturing facility located in Pine Forge,
Pennsylvania. We also own five acres of land in Surrey, British Columbia,
Canada, on which a 10,000 square foot wireless tower fabrication, assembly and
storage facility and a 5,000 square foot office building are located; four acres
of land near Montreal, Quebec, Canada, on which a 7,000 square foot facility is
located; a one acre lot in Houston, Texas, on which approximately 2,500 square
feet of office space and 5,000 square feet of warehouse space are located; 8.6
acres of land in Visalia, California, on which a 57,000 square foot broadcast
tower manufacturing facility is located; and 0.4 acres of land in Tucson,
Arizona, on which a 6,250 square foot office building is located. We also lease
office space in the following locations:

      --   Phoenix and Tucson, Arizona;

      --   Little Rock, Arkansas;

      --   Burbank, Los Angeles, Newport Beach, Sacramento and San Jose,
           California;

      --   Ft. Lauderdale, Palm Beach Gardens, Tampa and Orlando, Florida;

      --   Ridgeland, Mississippi;

      --   Las Vegas, Nevada;

      --   Syracuse, New York;

      --   Charlotte and Greensboro, North Carolina;

      --   Columbus, Ohio;

      --   Portland and Roseburg, Oregon;

      --   Conshohocken, Forty Fort and Upper Gwynedd Township, Pennsylvania;

      --   Austin, Dallas and Houston, Texas;

      --   Redmond and Seattle, Washington; and

      --   Alberta, Nova Scotia and Ontario, Canada.

     Our interests in communications sites are comprised of a variety of fee
interests, leasehold interests created by long-term lease agreements, private
easements, easements and licenses or rights-of-way granted by government
entities. In rural areas, a communications site typically consists of a
three-to-five acre tract which supports towers, equipment shelters and guy wires
to stabilize the structure. Less than 2,500 square feet are required for a
self-supporting tower structure of the kind typically used in metropolitan
areas. Land leases generally have an initial term of five years, with five
additional five-year renewal periods. You should read "--Products and
Services--Wireless Tower Ownership and Leasing" for a list of the locations of
our owned towers.

                                      10
<PAGE>   14
ITEM 3.   LEGAL PROCEEDINGS

     From time to time, SpectraSite is involved in various legal proceedings
relating to claims arising in the ordinary course of business. We are not
currently a party to any such legal proceeding, the adverse outcome of which,
individually or in the aggregate, is expected to have a material adverse effect
on our business, financial condition or results of operations.

                                      11
<PAGE>   15

ITEM 4.     SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

    None.

                                    PART II

ITEM 5.     MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
            MATTERS

MARKET PRICES

    Prior to our acquisition of Westower Corporation in a merger transaction,
our common stock was privately held with no public trading market. On September
1, 1999, our common stock was approved for trading on the Nasdaq National
Market under the symbol "SITE", and public trading commenced on September 3,
1999. The following table sets forth on a per share basis the high and low
sales prices for consolidated trading in our common stock as reported on the
Nasdaq National Market for the period from September 3, 1999 through September
30, 1999 and the fourth quarter of 1999.

<TABLE>
<CAPTION>
                                                                                COMMON STOCK
                                                                               --------------
                                                                              HIGH         LOW
                                                                             ------       -----
<S>                                                                         <C>          <C>
1999
Third quarter (beginning September 3)................................        $14 7/8      $    11
Fourth quarter.......................................................         12 1/8        7 3/8
2000
</TABLE>

    As of February 29, 2000, there were approximately 239 holders of record of
our common stock.

DIVIDEND POLICY

    We have never declared or paid any cash dividends on our common stock. For
the foreseeable future, we intend to retain any earnings to finance the
development and expansion of our business, and we do not anticipate paying any
cash dividends on our common stock. In addition, our credit facility and the
indentures governing our senior discount notes restrict our ability to pay
dividends. Any future determination to pay dividends will be at the discretion
of our board of directors and will be dependent upon then existing conditions,
including our financial condition and results of operations, capital
requirements, contractual restrictions, business prospects and other factors
that the board of directors consider relevant. Furthermore, because SpectraSite
Holdings is a holding company, it depends on the cash flow of its subsidiaries,
and SpectraSite Communications' credit facility imposes restrictions on
Holdings' subsidiaries ability to distribute cash to Holdings.

                                      12
<PAGE>   16
ITEM 6.  SELECTED CONSOLIDATED FINANCIAL DATA


     The following table sets forth summary historical financial data derived
from our consolidated financial statements, as of and for:

      --   the year ended December 31, 1996;

      --   the period from January 1, 1997 to May 12, 1997;

      --   the period from SpectraSite's inception on April 25, 1997 to
           December 31, 1997;

      --   the year ended December 31, 1998; and

      --   the year ended December 31, 1999.

     The information set forth below should be read in conjunction with
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and our consolidated financial statements and related notes.

<TABLE>
<CAPTION>
                                              TELESITE (PREDECESSOR)     SPECTRASITE                       SPECTRASITE
                                             -------------------------   ------------                 ---------------------
                                                            JANUARY 1,    APRIL 25,     TELESITE &         YEAR ENDED
                                              YEAR ENDED      1997-         1997-       SPECTRASITE       DECEMBER 31,
                                             DECEMBER 31,    MAY 12,     DECEMBER 31,    COMBINED     ---------------------
                                                 1996          1997          1997          1997         1998        1999
                                             ------------   ----------   ------------   -----------   --------   ----------
                                                             (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                          <C>            <C>          <C>            <C>           <C>        <C>
STATEMENT OF OPERATIONS DATA:
Revenues:
  Site leasing.............................     $   --        $   --       $    --        $    --     $    656   $   46,515
  Network services.........................      8,841         1,926         5,002          6,928        8,142       53,570
                                                ------        ------       -------        -------     --------   ----------
Total revenues.............................      8,841         1,926         5,002          6,928        8,798      100,085
                                                ------        ------       -------        -------     --------   ----------
Operating expenses:
  Costs of operations (excluding
    depreciation and amortization expense):
    Site leasing...........................         --            --            --             --          299       17,825
    Network services.......................      2,255           595         1,120          1,715        2,492       36,489
  Selling, general and administrative
    expenses...............................      4,256         1,742         7,390          9,132        9,690       38,182
  Depreciation and amortization expense....         91            56           489            545        1,268       37,976
  Restructuring and non-recurring
    charges................................         --            --            --             --           --        7,727
                                                ------        ------       -------        -------     --------   ----------
Total operating expenses...................      6,602         2,393         8,999         11,392       13,749      138,199
                                                ------        ------       -------        -------     --------   ----------
Operating income (loss)....................     $2,239        $ (467)      $(3,997)       $(4,464)    $ (4,951)  $  (38,114)
                                                ======        ======       =======        =======     ========   ==========
Net income(loss)...........................     $2,289        $ (503)      $(3,890)       $(4,393)    $ (9,079)  $  (97,668)
Net income (loss) applicable to common
  shareholders.............................      2,289          (503)       (4,390)        (4,893)     (11,235)     (98,428)
Net loss per share (basic
  and diluted).............................                                $ (5.21)                   $ (11.98)  $   (12.48)
Weighted average common shares
  outstanding (basic and diluted)..........                                    842                         938        7.886
OTHER DATA:
Net cash provided by (used in) operating
  activities...............................     $1,109        $  (71)      $   223        $   152     $ (2,347)  $   17,555
Net cash provided by (used in) investing
  activities...............................       (853)         (322)       (7,178)        (7,500)     (45,002)    (813,225)
Net cash provided by (used in) financing
  activities...............................       (266)          390         9,189          9,579      144,663      733,900
EBITDA(a)..................................      2,330          (411)       (3,508)        (3,919)      (3,683)       7,589
Capital expenditures(b)....................        498            64           850            914       26,598      644,778
SELECTED OPERATING DATA (AT END OF PERIOD):
Number of owned towers...............................................................           5          106        2,765
BALANCE SHEET DATA (AT END OF PERIOD):
Cash, cash equivalents and short term investments....................................     $ 2,234     $114,962   $   37,778
Total assets.........................................................................      13,642      161,946    1,219,953
Total long-term debt.................................................................       2,331      132,913      718,778
Total shareholders' (deficiency) equity..............................................      (1,898)     (14,067)     457,756
</TABLE>

                                      13
<PAGE>   17
- ---------------

(a) EBITDA consists of operating income (loss) before depreciation and
    amortization expense and restructuring and non-recurring charges. EBITDA is
    provided because it is a measure commonly used in the communications site
    industry as a measure of a company's operating performance. EBITDA is not a
    measurement of financial performance under generally accepted accounting
    principles and should not be considered an alternative to net income as a
    measure of performance or to cash flow as a measure of liquidity. EBITDA is
    not necessarily comparable with similarly titled measures for other
    companies. SpectraSite believes that EBITDA can assist in comparing company
    performance on a consistent basis without regard to depreciation and
    amortization expense, which may vary significantly depending on accounting
    methods where acquisitions are involved or non-operating factors such as
    historical cost bases. EBITDA presented in the table is consistent with
    EBITDA calculated under the indentures governing SpectraSite's 2008 notes
    and its 2009 notes.

(b) Capital expenditures for Telesite have been reduced for the periods ended
    December 31, 1996 and May 12, 1997 by $340 and $258, respectively. These
    expenditures were for land and construction in progress which were sold
    prior to the closing of the acquisition of Telesite.


                                      14
<PAGE>   18

ITEM 7.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
          RESULTS OF OPERATIONS

BUSINESS OVERVIEW

     SpectraSite's primary focus is on the ownership of multi-tenant towers and
leasing of antenna space on such towers. As of December 31, 1999, we had 2,765
towers in service, as compared to 106 towers at December 31, 1998. As a result
of our limited operating history and primary focus on tower ownership and
leasing, management believes that our results of operations for the period ended
December 31, 1997 and for the years ended December 31, 1998 and 1999 are not
indicative of our results of operations in the future. We previously operated in
one business segment. As a result of the Nextel tower acquisition and the
Westower merger, we now operate in two business segments, site leasing and
network services. For further details about our business segments, refer to Note
11 to our consolidated financial statements.

     Historically, we have derived most of our revenues from network services
activities. As a result of recent acquisitions, principally the Nextel and
Westower transactions, we expect that network services and antenna site leasing
will generate most of our revenues. On a pro forma basis, after giving effect to
the Nextel tower acquisition, the Westower merger and certain other
transactions, site leasing and network services would have represented 36% and
64% of our revenues, respectively, for the year ended December 31, 1999. We
believe that our site leasing business will continue to represent a substantial
portion of our revenues and will continue to grow as we increase our network of
towers.

     Our two largest expense line items have been depreciation and amortization
and selling, general and administrative expense. Depreciation expense primarily
relates to our towers, which we depreciate over 15 years. In 1999, amortization
expense is primarily due to goodwill associated with the Westower merger. On a
pro forma basis, after giving effect to the Nextel tower acquisition, the
Westower merger and certain other transactions, depreciation and amortization
expense would have represented 35% of revenues for the year ended December 31,
1999. We experienced a significant increase in selling, general and
administrative expense in 1999 as we integrated Westower's operations and
increased our employee base to market and manage the 2,000 Nextel towers and
build towers for Nextel under the master site commitment agreement.

RESULTS OF OPERATIONS

     YEAR ENDED DECEMBER 31, 1999 COMPARED TO THE YEAR ENDED DECEMBER 31, 1998

     Consolidated revenues for the year ended December 31, 1999 were $100.1
million, an increase of $91.3 million from the year ended December 31, 1998.
Revenues from site leasing increased to $46.5 million for the year ended
December 31, 1999 from $0.7 million for the year ended December 31, 1998,
primarily as a result of revenues derived from 2,000 communications towers which
we acquired from Nextel in April 1999. We owned 2,765 communications towers at
December 31, 1999 compared to 106 communications towers at December 31, 1998.

     Revenues from network services increased to $53.6 million for the year
ended December 31, 1999 compared to $8.1 million for the year ended December 31,
1998, primarily as a result of the acquisition of Westower in September 1999. In
September 1999, we announced that we would no longer directly provide site
acquisition services. Revenues from site acquisition activities were $7.2
million and $8.1 million in the years ended December 31, 1999 and 1998,
respectively.

     Costs of operations increased to $54.3 million for the year ended December
31, 1999 from $2.8 million for the year ended December 31, 1998. The increase in
costs was attributable to operating costs of the 2,000 communications towers
purchased from Nextel in April 1999 and the acquisition of Westower in September
1999. Costs of operations for site leasing as a percentage of site leasing
revenues decreased to 38.3% for the year ended December 31, 1999 from 45.6% for
the year ended December 31, 1998 primarily due to revenues generated from the
acquisition of towers from Nextel and co-location revenues on those towers. As
our site leasing operations mature, additional tenants on a tower will generate
decreases in costs of operations for site leasing as a percentage of site
leasing revenues and increases in cash flow because a significant

                                      15
<PAGE>   19

proportion of tower operating costs are fixed and do not increase with
additional tenants. Costs of operations for network services as a percentage of
network services revenues increased to 68.1% for the year ended December 31,
1999 from 30.6% for the year ended December 31, 1998. This increase is due to
construction activities associated with Westower's operations which have higher
levels of direct costs than our historical site acquisition activities.

     Selling, general and administrative expenses increased to $38.2 million for
the year ended December 31, 1999 from $9.7 million for the year ended December
31, 1998. The increase is a result of expenses related to additional corporate
overhead and field operations implemented to manage and operate the growth in
the ongoing activities of SpectraSite and the acquisition of Westower.

     Depreciation and amortization expense increased to $38.0 million for the
year ended December 31, 1999 from $1.3 million for the year ended December 31,
1998, primarily as a result of the increased depreciation from the towers we
acquired or constructed and amortization of goodwill related to the Westower
acquisition.

     For the year ended December 31, 1999, we recorded restructuring and
non-recurring charges of $7.7 million. In September 1999, we announced that we
would no longer directly provide site acquisition services. As a result, we
recorded restructuring charges of $7.1 million, of which $6.2 million related to
the write-off of goodwill associated with the purchase of Telesite Services, LLC
and $0.9 million related to costs of employee severance. In March 1999,
SpectraSite announced that it would relocate its marketing and administrative
operations from Little Rock, Arkansas and Birmingham, Alabama to its corporate
headquarters in Cary, North Carolina. As a result, we recorded a non-recurring
charge of $0.6 million for employee termination and other costs related to the
relocation of these activities.

     As a result of the factors discussed above, our loss from operations was
$38.1 million for the year ended December 31, 1999 compared to $5.0 million for
the year ended December 31, 1998.

     Net interest expense increased to $58.6 million during the year ended
December 31, 1999 from $4.6 million for the year ended December 31, 1998,
reflecting additional interest expense due to the issuance of our 12% senior
discount notes due 2008 in June 1998 and our 11 1/4% senior discount notes due
2009 in April 1999, as well as borrowings under our credit facility in April
1999.

     YEAR ENDED DECEMBER 31, 1998 COMPARED TO THE COMBINED RESULTS FOR THE YEAR
ENDED DECEMBER 31, 1997

     The following is a discussion of the financial condition and results of
operations of SpectraSite for the year ended December 31, 1998 and the year
ended December 31, 1997, which consists of the period from April 25, 1997
through December 31, 1997 and Telesite's results of operations for the period
from January 1, 1997 through May 12, 1997.

     Revenues increased to $8.8 million for the year ended December 31, 1998
from $6.9 million for the year ended December 31, 1997 due to the initiation of
site leasing activity and an increase in the number and size of site development
services projects.

     Selling, general and administrative expenses, including depreciation
expense, increased to $11.0 million for the year ended December 31, 1998 from
$9.7 million for the year ended December 31, 1997. The increase is a result of
expenses related to additional corporate overhead to manage and operate the
ongoing activities of SpectraSite. Marketing expenses related to tower
development activities as well as the site acquisition operations also
contributed to the increase in expenses. Telesite did not actively market its
services, relying primarily on its reputation in the industry and customer
referrals to generate revenues. To support our entry into tower development and
leasing, we have established a dedicated marketing effort which promotes tower
development and leasing as well as site acquisition services. Amortization of
goodwill increased to approximately $0.6 million in the year ended December 31,
1998 compared to approximately $0.3 million in the year ended December 31, 1997
as a result of acquisitions.

     As a result of the factors discussed above, our operating loss was $5.0
million for the year ended December 31, 1998, compared to $4.5 million for the
year ended December 31, 1997.


                                      16
<PAGE>   20

     Other income, which consists primarily of gain on sales of assets and
equity in earnings of affiliates, increased to approximately $0.5 million for
the year ended December 31, 1998 from approximately $0.1 million for the year
ended December 31, 1997. The increase is a result of a gain on the sale of
assets in connection with the disposal of Metrosite during the first quarter of
1998 of approximately $0.5 million. During the year ended December 31, 1997, we
recognized approximately $0.2 million as equity earnings of Communication
Management Specialists. We disposed of our interest in Communication Management
Specialists during the second quarter of 1998 and did not recognize any equity
in the earnings of this affiliate during 1998.

     COMBINED RESULTS FOR THE YEAR ENDED DECEMBER 31, 1997 COMPARED TO
TELESITE'S RESULTS FOR THE YEAR ENDED DECEMBER 31, 1996

     The following is a discussion of the financial condition and results of
operations of SpectraSite for the year ended December 31, 1997, which consists
of and for the period from April 25, 1997 through December 31, 1997 and
Telesite's results of operations for the period from January 1, 1997 through May
12, 1997, and of Telesite for the year ended December 31, 1996.

     Total revenues decreased to $6.9 million for the year ended December 31,
1997 from $8.8 million for the year ended December 31, 1996 due primarily to the
decreased demand for site development services from more established personal
communications services licensees as a result of their completing the first
phase of construction in their initial markets and not yet commencing secondary
build-outs in such markets or in additional markets, and the fact that holders
of certain more recently issued licenses had not yet commenced construction of
tower networks in their respective markets.

     Selling, general and administrative expenses increased to $9.1 million for
the year ended December 31, 1997 from $4.3 million for the year ended December
31, 1996. The increase is a result of the expenses related to management of the
ongoing activities of SpectraSite, expenses related to the implementation of
tower development and marketing activities, one-time non-cash charges of
approximately $2.6 million as a result of the formation of SpectraSite,
amortization of goodwill of approximately $0.3 million in connection with our
acquisition of Telesite and expenses incurred in connection with the operations
of Metrosite. We sold our interest in Metrosite during early 1998. We anticipate
that in the future costs related to tower development activities will be
capitalized as part of the cost of the towers.

     Operating loss was $4.5 million for the year ended December 31, 1997
compared to $2.2 million of operating income for the year ended December 31,
1996. The change is primarily a result of the decline in revenues and the
increase in selling, general and administrative expenses attributable to the
commencement of operations of SpectraSite.

     Other income, which consists primarily of equity in earnings of affiliates,
was approximately $0.1 million for the year ended December 31, 1997 and for the
year ended December 31, 1996.

LIQUIDITY AND CAPITAL RESOURCES

     SpectraSite Holdings is a holding company whose only significant asset is
the outstanding capital stock of its subsidiary, SpectraSite Communications. Our
only source of cash to pay interest on and principal of our indebtedness is
distributions from SpectraSite Communications. Prior to July 15, 2003, interest
expense on the 2008 notes will consist solely of non-cash accretion of original
issue discount and the 2008 notes will not require annual cash interest
payments. After such time, the 2008 notes will have accreted to approximately
$225.2 million and will require semi-annual cash interest payments of $13.5
million. The 2008 notes mature on July 15, 2008. Similarly, prior to October 15,
2004, interest expense on the 2009 notes will consist solely of non-cash
accretion of original issue discount and the 2009 notes will not require annual
cash interest payments. After such time, the 2009 notes will have accreted to
approximately $586.8 million and will require semi-annual cash interest payments
of $33.0 million. The 2009 notes mature on April 15, 2009. Furthermore, our
credit facility provides for periodic principal and interest payments.

                                      17
<PAGE>   21

     Our ability to fund capital expenditures, make scheduled payments of
principal of, or pay interest on, our debt obligations, and our ability to
refinance any such debt obligations, including the 2008 notes and the 2009
notes, will depend on our future performance, which, to a certain extent is
subject to general economic, financial, competitive, legislative, regulatory and
other factors that are beyond our control. Our business strategy contemplates
substantial capital expenditures, including an expected approximate amount of
$200 million during the first half of 2000, primarily to fund the construction
and acquisition of additional communications towers. Management believes that
cash flow from operations, available cash as of December 31, 1999, net proceeds
received from our public offering of common stock in February 2000 and
anticipated available borrowings under the credit facility will be sufficient to
fund our capital expenditures for the foreseeable future. However, if
acquisitions or other opportunities present themselves more rapidly than we
currently anticipate or if our estimates prove inaccurate, we may seek
additional sources of debt or equity capital prior to the end of 2000 or reduce
the scope of tower construction and acquisition activity. We cannot assure you
that we will generate sufficient cash flow from operations or that future
borrowings or equity or debt financings will be available on terms acceptable to
us, in amounts sufficient to service our indebtedness and make anticipated
capital expenditures.

     CASH FLOWS

     For the year ended December 31, 1999, cash flows provided by operating
activities were $17.6 million as compared to $2.3 million used in operating
activities in the year ended December 31, 1998. The change is primarily
attributable to the favorable cash flows generated from communications tower
acquisitions in 1999.

     For the year ended December 31, 1999, cash flows used in investing
activities were $813.2 million compared to $45.0 million for the year ended
December 31, 1998. In the year ended December 31, 1999, SpectraSite invested
$692.8 million in purchases of property and equipment and deposits on future
acquisitions, primarily related to the acquisition of communication towers from
Nextel. In addition, we used $128.4 million to acquire Westower in September
1999 and Stainless and Doty-Moore in December 1999. These investments were
partially offset by $15.4 million in maturities of short-term investments.

     In the year ended December 31, 1999, cash flows provided by financing
activities were $733.9 million as compared to $144.7 million in the year ended
December 31, 1998. The increase in cash provided by financing activities was
attributable to the proceeds from the sales of Series C preferred stock and the
2009 notes, as well as proceeds from borrowings under the credit facility.

     Net cash used in operating activities during the year ended December 31,
1998 was $2.3 million compared to $0.2 million provided by operating activities
during the comparable period in 1997. The increase in cash used in operating
activities was primarily attributable to an increase in accounts receivable
resulting from the timing of billings related to site development services and
the net loss incurred during the year. Net cash used for investing for the year
ended December 31, 1998 was $45.0 million compared to $7.5 million for the year
ended December 31, 1997. The cash used for investing activities during the year
ended December 31, 1998 was primarily the result of the investment of unused
proceeds from the sale of the 2008 notes in short-term investments, costs
associated with tower construction, the acquisition of towers from Airadigm
Communications, Inc. and the acquisition of GlobalComm. The cash used for
investing activities during the year ended December 31, 1997 primarily related
to the acquisition of Telesite. Net cash provided by financing activities for
the year ended December 31, 1998 was $144.7 million compared to $9.6 million for
the same period in 1997. The increase in cash provided by financing activities
was attributable to the proceeds from the sales of Series B preferred stock and
the 2008 notes.

     MERGERS AND ACQUISITIONS

     We acquired 45 communications towers and certain related assets from
Airadigm for an aggregate purchase price of $11.25 million in 1998 and 1999.
Airadigm is the anchor tenant on 48 of our towers and has filed for protection
under Chapter 11 of the U.S. Bankruptcy Code. We cannot predict the impact of
this proceeding on our future results of operations or financial condition.

                                      18
<PAGE>   22

     On April 20, 1999, we acquired 2,000 communications towers from Nextel in a
merger transaction. All the sites were then leased back to Nextel under a master
lease agreement. In addition, in connection with this transaction, Nextel and
its controlled affiliates agreed to offer SpectraSite certain exclusive
opportunities relating to the construction or purchase of an additional 1,700
sites. Some of these sites may in the future be leased to Nextel Partners
Operating Corp. instead of Nextel. Nextel Partners, Inc., the parent of Nextel
Partners Operating Corp., is an entity in which Nextel has a minority equity
interest. In connection with this acquisition, we paid $560.0 million in cash
and issued 14.0 million shares of Series C preferred stock, valued at $70.0
million, to Nextel.

     The following table sets forth the sources and uses of funds for the Nextel
tower acquisition in thousands of dollars:

<TABLE>
<S>                                                    <C>
SOURCES OF FUNDS:
Credit facility.....................................   $150,000
11 1/4% senior discount notes due 2009..............    340,004
Series C preferred stock issued to Nextel...........     70,000
Series C preferred stock sold to the Series C
  investors.........................................    231,434
                                                       --------
  Total sources.....................................   $791,438
                                                       ========
USES OF FUNDS:
Cash paid to Nextel.................................   $560,000
Series C preferred stock issued to Nextel...........     70,000
Cash available for general corporate purposes.......    127,688
Estimated fees and expenses.........................     33,750
                                                       --------
  Total uses........................................   $791,438
                                                       ========
</TABLE>

     On September 2, 1999, we acquired Westower Corporation, a Washington
corporation, in a stock-for-stock merger. In this transaction, Westower
stockholders received 1.81 shares of our common stock, plus cash for any
fractional Westower share, in exchange for each of their shares of Westower
common stock. In connection with the merger, SpectraSite repaid approximately
$70.0 million of Westower indebtedness with cash-on-hand. Westower Corporation
now operates as a wholly-owned subsidiary of SpectraSite Communications, which
in turn is a wholly-owned subsidiary of SpectraSite Holdings.

     On September 8, 1999, we acquired a 33% interest in Concourse
Communications Group, LLC for an aggregate purchase price of $2.5 million.
Concourse was established to build certain wireless communications
infrastructures at facilities owned by the Port Authority of New York and New
Jersey, including the Holland and Lincoln Tunnels, World Trade Center Concourse
and New York's three major airports. As part of our investment, we agreed to
provide approximately $14.4 million of working capital and construction
financing to Concourse in the form of secured loans over the next three years.
At December 31, 1999, Concourse owed us $2.9 million under these loans. In
addition, after three years, we have an option to purchase an additional 33%
interest in Concourse, and after six years, we have an option to purchase the
remaining interest in Concourse.

     In November 1999, we entered into an agreement to acquire 94 communications
towers from DigiPH PCS, Inc. for $36.0 million in cash. The towers span the
corridor connecting Jackson, Mississippi, Mobile, Alabama and Tallahassee,
Florida. We acquired 61 towers for approximately $23.9 million on December 29,
1999, and we expect to acquire the remaining towers during the first quarter of
2000.

     On December 30, 1999, we acquired Stainless, Inc., formerly a wholly-owned
subsidiary of Northwest Broadcasting, L.P., for $40.0 million in cash. Stainless
provides engineering, fabrication and other services in connection with the
erection of towers used for television broadcast companies. Also on December 30,
1999, we acquired Doty-Moore Tower Services, Inc., Doty-Moore Equipment Company,
Inc. and Doty Moore RF Services, Inc. for $2.5 million in cash and 500,000
unregistered shares of our common stock. Doty-Moore is a leading source for
broadcast tower construction and technical services. In addition, on January 5,
2000, we acquired Vertical Properties, Inc. in a merger transaction under which
we issued 225,000 unregistered shares

                                      19
<PAGE>   23

of our common stock and repaid outstanding indebtedness of approximately $2.0
million. Vertical Properties is a broadcast tower development company formed to
meet the needs of broadcasters in secondary broadcast markets faced with the
complexities of converting to digital technology through site acquisition, tower
placement and leasing of antenna space. On January 28, 2000, we acquired
substantially all of the assets of International Towers Inc. and its
subsidiaries, including S&W Communications Inc. International Towers owns a
modern broadcast tower manufacturing facility and, through S&W Communications,
provides integrated services for the erection of broadcast towers, foundations
and multi-tenant transmitter buildings. We paid $5.5 million and issued an
aggregate of 350,000 unregistered shares of our common stock in connection with
this acquisition. We borrowed an additional $50.0 million under our credit
facility in December 1999 to partially fund these mergers and acquisitions.

     On January 5, 2000, we acquired Apex Site Management Holdings, Inc. in a
merger transaction. Apex provides rooftop and in-building access to wireless
carriers. We issued approximately 4.5 million unregistered shares of our common
stock to the stockholders of Apex and approximately 194,000 options to purchase
common stock at an exercise price of $3.58 per share to certain option holders
of Apex at the closing of the merger. In addition, we issued approximately 1.5
million additional shares of common stock into escrow, which shares may be
released to Apex's stockholders six months after this offering based on the
average trading price for our common stock for the 30-day period immediately
preceding the six-month anniversary of this offering. We also used approximately
$6.2 million in cash to repay outstanding indebtedness and other obligations of
Apex in connection with the merger.

     On February 17, 2000, we entered into an agreement with AirTouch and
several of its affiliates, under which we agreed to lease or sublease
approximately 430 communications towers for $155.0 million, subject to
adjustment. Under the terms of the agreement and the master sublease which the
parties will enter into at closing, we will manage, maintain and lease the
available space on AirTouch towers covered by the agreement and located
throughout Southern California. AirTouch will pay us an average monthly fee per
site for its cellular, microwave and paging facilities. We also have the right
to lease available tower space to co-location tenants in specified situations.
We also entered into a site marketing agreement with AirTouch to provide
AirTouch with certain tower leasing and marketing services pending the closing
of the master sublease, and we have agreed to enter into a three-year exclusive
build-to-suit agreement with AirTouch in Southern California. Under the terms of
the build-to-suit agreement, we will develop and construct locations for
wireless communications towers on real property designated by AirTouch.

     We expect the AirTouch transaction to close in stages, with the initial
closing to occur no later than November 15, 2000, if certain conditions are met.
The initial closing will involve at least 105 towers and each subsequent closing
will involve at least 45 towers, or a smaller number when fewer than 45 towers
remain to be transferred, and the final closing will occur no later than six
months after the initial closing. At each respective closing, we will pay for
the towers included in that closing according to a formula contained in the
master sublease. As partial security for our obligations under the master
sublease, we deposited $23.0 million into escrow.

     FINANCING TRANSACTIONS

     In connection with the Nextel tower acquisition, we privately placed
46,286,795 shares of Holdings' Series C preferred stock for an aggregate
purchase price of $231.4 million. On April 20, 1999, SpectraSite completed the
private offering of $586.8 million aggregate principal amount at maturity of
11 1/4% senior discount notes due 2009. We used a portion of the net proceeds
from these offerings to partially fund the Nextel tower acquisition and to pay
related fees and expenses. We used the remaining proceeds for general corporate
purposes, including the purchase and construction of new towers and selective
acquisitions.

     Also on April 20, 1999, we entered into a $500.0 million seven-year credit
facility. We borrowed $150.0 million under this facility at the closing of the
Nextel tower acquisition. We also issued 2.0 million shares of common stock to
various parties as consideration for providing financing commitments related to
the Nextel tower acquisition. We did not utilize these commitments for the
Nextel acquisition primarily because of the success of the 2009 notes offering.
We currently have $300.0 million available under our credit facility

                                      20
<PAGE>   24

to fund new tower construction or acquisition activity. In addition, as of
December 31, 1999, our cash and cash equivalents were $37.8 million.

     On September 15, 1999, we completed registered exchange offers for our 2008
notes and our 2009 notes. Under a registration rights agreement with the initial
purchasers of the 2008 notes, we agreed to complete an exchange offer for the
privately placed 2008 notes prior to March 10, 1999. Since we did not complete
this exchange offer prior to March 10, 1999, the interest rate on the 2008 notes
increased by 0.50% per year. This additional interest accrued on the 2008 notes
until we completed the exchange offer, and we paid this interest in cash on
January 15, 2000. Similarly, under a registration rights agreement with the
initial purchasers of the 2009 notes, Holdings agreed to file a registration
statement with the SEC for an exchange offer of registered notes for the
privately placed 2009 notes before July 20, 1999. Since we did not file the 2009
notes exchange offer registration statement before July 20, 1999, the interest
rate on the 2009 notes increased by 0.50% per year. This additional interest
accrued on the 2009 notes until we filed the exchange offer registration
statement on August 12, 1999, and we paid this interest in cash on October 15,
1999.

     On February 4, 2000, we completed a public offering of our common stock. We
offered 25,645,000 shares of common stock, including an over-allotment option
exercised by our underwriters. In addition, each share of our preferred stock
converted to a share of common stock upon the closing of the offering. The
number of shares of our common stock outstanding immediately after the offering,
including the 70,749,625 shares issued upon conversion of the preferred stock
and 6,007,996, 225,000 and 350,000 shares issued in connection with our
acquisitions of Apex and Vertical Properties in merger transactions and
substantially all of the assets of International Towers, Inc., was 123,169,225.
We received net proceeds of $411.3 million from the offering, which we intend to
use to fund costs related to the construction and acquisition of towers,
including under the AirTouch agreements, and for general corporate purposes.

     INFLATION

     Some of our expenses, such as those for marketing, wages and benefits,
generally increase with inflation. However, we do not believe that our financial
results have been, or will be, adversely affected by inflation in a material
way.

RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS

     In June 1998, the FASB issued Statement of Financial Accounting Standards
No. 133, Accounting for Derivative Instruments and Hedging Activities. SFAS 133
requires that derivative instruments be recognized as either assets or
liabilities in the consolidated balance sheet based on their fair values.
Changes in the fair values of such derivative instruments will be recorded
either in results of operations or in other comprehensive income, depending on
the intended use of the derivative instrument. The initial application of SFAS
133 will be reported as the effect of a change in accounting principle. SFAS 133
is effective for all fiscal years beginning after June 15, 2000. We have not yet
determined the effect that the adoption of SFAS 133 will have on our
consolidated financial statements.

YEAR 2000 COMPLIANCE

     We have not experienced any immediate adverse impact from the transition to
the year 2000. However, we cannot assure you that we or our suppliers and
customers have not been affected in a manner that is not yet apparent. In
addition, certain computer programs which were date sensitive to the year 2000
may not process the year 2000 as a leap year, and any negative consequential
effects remain unknown. As a result, we continue to monitor our year 2000
compliance and the year 2000 compliance of our suppliers and customers.

                                      21
<PAGE>   25
ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS


     We use financial instruments, including fixed and variable rate debt, to
finance our operations. The information below summarizes our market risks
associated with debt obligations outstanding as of December 31, 1999. The
following table presents principal cash flow and related weighted average
interest rates by fiscal year of maturity. Variable interest rate obligations
under the credit facility are not included in the table. We have no long-term
variable interest obligations other than borrowings under the credit facility.

<TABLE>
<CAPTION>
                                                     EXPECTED MATURITY DATE
                          ----------------------------------------------------------------------------
                            1999       2000       2001       2002       2003     THEREAFTER    TOTAL
                          --------   --------   --------   --------   --------   ----------   --------
                                                     (DOLLARS IN THOUSANDS)
<S>                       <C>        <C>        <C>        <C>        <C>        <C>          <C>
Long-term obligations:
  Fixed rate............  $     --   $     --   $     --   $     --   $     --    $516,251    $516,251
     Average interest
       rate.............        --         --         --         --         --        11.5%       11.5%
</TABLE>

                                      22
<PAGE>   26


ITEM 8.     CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

        The financial statements and related financial information required by
this Item are included in this report beginning on page F-1.

ITEM 9.     CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
            FINANCIAL DISCLOSURE

         None.

                                    PART III

ITEM 10.    DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

    The executive officers of SpectraSite are as follows:

<TABLE>
<CAPTION>
            NAME                                    AGE                         POSITION
    ----------------------                          ---                         --------
    <S>                                             <C>      <C>
    Stephen H. Clark............................     55       President and Chief Executive Officer
    Timothy G. Biltz............................     41       Chief Operating Officer
    David P. Tomick.............................     48       Executive Vice President, Chief Financial Officer and
                                                              Secretary
    Richard J. Byrne............................     42       Executive Vice President--Business Development
    Calvin J. Payne.............................     47       Executive Vice President--Design and Construction
    Terry L. Armant.............................     51       Senior Vice President--Operations
    John H. Lynch...............................     42       Vice President, General Counsel
    Daniel I. Hunt..............................     35       Vice President--Finance and Administration
    Steven C. Lilly.............................     30       Vice President and Treasurer
    Douglas A. Standley.........................     42       Vice President--Broadcast Group
    Alexander L. Gellman........................     38       Vice President--Site Management Group
</TABLE>

         The remaining information required by this Item is incorporated by
reference to SpectraSite's Proxy Statement for the 2000 Annual Meeting of
Stockholders.


                                      23

<PAGE>   27

ITEM 11.    EXECUTIVE COMPENSATION

         Other than as set forth below, the information required by this Item is
incorporated by reference to SpectraSite's Proxy Statement for the 2000 Annual
Meeting of Stockholders.

      SUMMARY COMPENSATION TABLE

      The following table sets forth the cash and non-cash compensation paid by
or incurred on behalf of SpectraSite to its Chief Executive Officer and four
other most highly compensated executive officers for the years ended December
31, 1997, 1998 and 1999. Amounts shown for 1997 include compensation paid by
Spectrasite Holdings to the named executive officers from April 25, 1997, the
date of Spectrasite Holdings' inception, through December 31, 1997.

<TABLE>
<CAPTION>
                                                                           LONG TERM
                                                                      COMPENSATION AWARDS
                                                                    -----------------------
                                                                                 NUMBER OF
                                    ANNUAL COMPENSATION                          SECURITIES
                          ---------------------------------------                UNDERLYING       ALL OTHER
        NAME AND                                          OTHER     RESTRICTED    OPTIONS/     COMPENSATION($)
   PRINCIPAL POSITION     YEAR   SALARY($)   BONUS($)   ANNUAL($)    STOCK($)     SARS(#)            (e)
   ------------------     ----   ---------   --------   ---------   ----------   ----------   ------------------
<S>                       <C>    <C>         <C>        <C>         <C>          <C>          <C>
Stephen H. Clark........  1999    219,006    150,000          --          --      775,000            2,535
  Chief Executive
    Officer               1998    168,000     68,000          --          --      300,000            2,400
                          1997    107,046         --          --          --      425,000               --
David P. Tomick.........  1999    187,921     77,360          --          --      225,000            2,442
  Chief Financial
    Officer               1998    140,000     56,000          --          --       50,000            2,178
                          1997     64,029         --          --          --      225,000               --
Terry L. Armant(a)......  1999    148,025     51,845          --          --       25,000            2,316
                          1998     55,192     68,150          --          --      125,000               --
  Senior Vice
    President-Operations
Richard J. Byrne(b).....  1999    103,205     70,613     138,613     224,500(d)   200,000           22,172
  Executive Vice
    President-Business
    Development
Timothy G. Biltz(c).....  1999     89,000     50,000      17,609          --      400,000           32,064
  Chief Operating
  Officer
</TABLE>

- ---------------

(a) Mr. Armant joined SpectraSite in August 1998.
(b) Mr. Byrne joined SpectraSite in April 1999.
(c) Mr. Biltz joined SpectraSite in August 1999.
(d) Mr. Byrne received 50,000 shares of restricted common stock in April 1999 in
    connection with his employment by SpectraSite, and he is entitled to
    dividends, if any, paid on his restricted stock. As of December 31, 1999,
    Mr. Byrne held 50,000 shares of restricted common stock with a fair market
    value of $544,000. No other named executive officer holds shares of
    restricted stock.
(e) Amounts reported for 1999 include SpectraSite's contribution under its
    401(k) plan of $2,535, $2,442, $2,316 and $707 for Messrs. Clark, Tomick,
    Armant and Byrne, respectively, and relocation allowances of $21,465 and
    $32,064 for Messrs. Byrne and Biltz, respectively.

SECTION 16 (a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

         Based upon a review of forms submitted to SpectraSite during and with
respect to 1999, all executive officers, directors and 10% beneficial owners
filed reports pursuant to Section 16 (a) of the Exchange Act on a timely basis,
except for the initial report of beneficial ownership on Form 3 by two
executive officers.  In addition, one 10% beneficial owner did not file its Form
3 or a Form 4 reporting one transaction on a timely basis.

                                      24
<PAGE>   28
ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

         The information required by this Item is incorporated by reference to
SpectraSite's Proxy Statement for the 2000 Annual Meeting of Stockholders.

ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         The information required by this Item is incorporated by reference to
SpectraSite's Proxy Statement for the 2000 Annual Meeting of Stockholders.

                                    PART IV

ITEM 14.    EXHIBITS, FINANCIAL SCHEDULES AND REPORTS ON FORM 8-K

    (a)     Documents incorporated by reference or filed with this Report
            (1) The required financial statements are included in this report
            beginning on page F-1.
            (2) The required financial schedule information is provided in the
                financial statements included in this report.
            (3) Listed below are the exhibits which are filed or incorporated
            by reference as part of this report (according to the number
            assigned to them in Item 601 of Regulation S-K).

<TABLE>
<CAPTION>
    EXHIBIT
     NUMBER                           DESCRIPTION
    -------                           -----------
<S>              <C>
      2.1         Agreement and Plan of Merger, dated as of February 10, 1999,
                  among Nextel Communications, Inc., Tower Parent Corp., Tower
                  Merger Vehicle, Inc., Tower Asset Sub Inc., SpectraSite
                  Holdings, Inc. (the "Registrant"), SpectraSite
                  Communications, Inc. and SHI. Merger Sub, Inc. (the "Nextel
                  Merger Agreement"). Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403
</TABLE>



                                      25
<PAGE>   29
<TABLE>
<CAPTION>
    EXHIBIT
     NUMBER                           DESCRIPTION
    -------                           -----------
<S>              <C>
      2.2         Amendment No. 1 to the Nextel Merger Agreement.  Incorporated
                  by reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

      2.3         Agreement and Plan of Merger among Westower Corporation,
                  SpectraSite Holdings, Inc. and W. Acquisition Corp., dated as
                  of May 15, 1999.  Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403

      2.4         Merger Agreement and Plan of Reorganization, dated as of
                  November 24, 1999, among SpectraSite Holdings, Inc. (the
                  "Apex Merger Agreement"), Apex Merger Sub, Inc. and Apex Site
                  Management Holdings, Inc. Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-1, file no. 333-93873

      2.5         Stock Purchase Agreement, dated as of December 30, 1999,
                  between Northwest Broadcasting, L.P. and SpectraSite
                  Holdings, Inc.  Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-1, file no. 333-93873

      2.6         Stock Purchase Agreement, dated as of December 30, 1999,
                  among Donald Doty, John Patrick Moore and SpectraSite
                  Holdings, Inc. Incorporated by reference to the corresponding
                  exhibit to the Registrant's registration statement on Form
                  S-1, file no. 333-93873

      2.7         Merger Agreement and Plan of Reorganization, dated as of
                  December 30, 1999, among SpectraSite Holdings, Inc., VPI
                  Merger Sub, Inc., Vertical Properties, Inc. and the
                  stockholders of Vertical Properties, Inc. Incorporated by
                  reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-1, file no. 333-93873

      2.8         Asset Purchase Agreement, dated as of January 5, 2000, among
                  International Towers, Inc., S&W Communications, Inc., Tri-Ex
                  Tower, Inc., International Tower Industries and SpectraSite
                  Holdings, Inc. Incorporated by reference to the
                  corresponding exhibit to the Registrant's report on Form
                  8-K filed on January 21, 2000
</TABLE>


                                      26
<PAGE>   30
<TABLE>
<CAPTION>
    EXHIBIT
     NUMBER                           DESCRIPTION
    -------                           -----------
<S>              <C>
      2.9         Agreement to Sublease, dated as of February 16, 2000, by and
                  between AirTouch Communications, Inc. and the Other Parties
                  Named Therein as Sublessors and California Tower, Inc. and
                  SpectraSite Holdings, Inc.

      3.1         Certificate of Incorporation of Integrated Site Development
                  ("ISD"), dated and filed as of April 25, 1997. Incorporated
                  by reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

      3.2         Certificate of Amendment of the Certificate of Incorporation
                  of ISD, dated as of May 11, 1997 (authorizing Series A
                  Preferred Stock) and filed May 12, 1997. Incorporated by
                  reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

      3.3         Certificate of Amendment of the Certificate of Incorporation
                  of ISD, dated as of August 14, 1997 (changing name to
                  SpectraSite Communications, Inc. ("SCI")) and filed August
                  15, 1997.  Incorporated by reference to the corresponding
                  exhibit to the Registrant's registration statement on Form
                  S-4, file no. 333-67403

      3.4         Certificate of Amendment of the Certificate of Incorporation
                  of SCI, dated and filed as of October 29, 1997 (changing name
                  to SpectraSite Holdings, Inc.). Incorporated by reference to
                  the corresponding exhibit to the Registrant's registration
                  statement on Form S-4 , file no. 333-67403

      3.5         Certificate of Amendment of the Certificate of Incorporation
                  of the Registrant, dated and filed as of March 23, 1998
                  (authorizing Series B Preferred Stock). Incorporated by
                  reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

      3.6         Certificate of Amendment of the Certificate of Incorporation
                  of the Registrant, dated as of May 29, 1998 and filed June 2,
                  1998. Incorporated by reference to the corresponding exhibit
                  to the Registrant's registration statement on Form S-4, file
                  no. 333-67403

      3.7         Certificate of Amendment of the Certificate of Incorporation
                  of the Registrant, dated as of August 18, 1998 and filed
                  August 19, 1998. Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403

      3.8         Amended Bylaws of SpectraSite Holdings, Inc.  Incorporated by
                  reference to the
</TABLE>

                                      27
<PAGE>   31


<TABLE>
<CAPTION>
    EXHIBIT
     NUMBER                           DESCRIPTION
    -------                           -----------
<S>              <C>
                  reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-1, file no. 333-93873

      3.9         Amended and Restated Certificate of Incorporation of the
                  Registrant. Incorporated by reference to the corresponding
                  exhibit to the Registrant's registration statement on Form
                  S-4, file no. 333-67403

      3.10        Certificate of Amendment to the Amended and Restated
                  Certificate of Incorporation of the Registrant, dated August
                  31, 1999. Incorporated by reference to the corresponding
                  exhibit to the Registrant's report on Form 8-K, dated
                  September 2, 1999 and filed September 17, 1999

      4.1         Indenture, dated as of June 26, 1998, between the Registrant
                  and United States Trust Company of New York, as trustee.
                  Incorporated by reference to the corresponding exhibit to the
                  Registrant's registration statement on Form S-4 , file no.
                  333-67403

      4.2         First Supplemental Indenture, dated as of March 25, 1999,
                  between the Registrant and United States Trust Company of New
                  York, as trustee. Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-4 , file no. 333-67403

      4.3         Indenture, dated as of April 20, 1999, between the Registrant
                  and United States Trust Company of New York, as trustee.
                  Incorporated by reference to the corresponding exhibit to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

     10.1         Stock Purchase Agreement (Series A Preferred Stock), dated as
                  of May 12, 1997, by and among U.S. Towers, Inc. ("UST"),
                  Telesite Services, LLC ("Telesite"), Metrosite Management,
                  LLC ("Metrosite"), Whitney Equity Partners, L.P. ("Whitney
                  Equity"), Kitty Hawk Capital Limited Partnership, L.P., III
                  ("Kitty Hawk III"), and ISD.  Incorporated by reference to
                  the corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403

     10.2         Stock Purchase Agreement (Series B Preferred Stock), dated as
                  of March 23, 1998, by and among the Registrant, Whitney
                  Equity, J. H. Whitney, III, L.P. ("Whitney III"), Whitney
                  Strategic Partners III, L.P. ("Whitney Strategic"),
                  Waller-Sutton Media Partners, L.P. ("Waller-Sutton"), Kitty
                  Hawk III, Kitty Hawk Capital Limited Partnership, IV ("Kitty
                  Hawk IV"), Eagle Creek Capital, L.L.C. ("Eagle Creek"), The
                  North Carolina Enterprise Fund, L.P. ("NCEF"), Finley Family
                  Limited Partnership ("Finley LP"), William R. Gupton
                  ("Gupton"), Jack W. Jackman ("Jackman") and Alton D. Eckert
                  ("Eckert"). Incorporated by reference to the corresponding
                  exhibit to the Registrant's registration statement on Form
                  S-4, file no. 333-67403

     10.3         First Amendment to Stock Purchase Agreement (Series B
                  Preferred Stock), dated as of May 29, 1998.  Incorporated by
                  reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

     10.4         Second Amendment to Stock Purchase Agreement (Series B
                  Preferred Stock), dated as of August 27, 1998. Incorporated
                  by reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

     10.5         Second Amended and Restated Registration Rights Agreement,
                  dated as of April 20, 1999, by and among the Registrant,
                  Whitney Equity, Whitney III, Whitney Strategic,
                  Waller-Sutton, Kitty Hawk III, Kitty Hawk IV, Eagle Creek,
                  NCEF, Finley LP, certain affiliates of CIBC Oppenheimer Corp.
                  (the "CIBC Purchasers"), certain affiliates and employees of
                  Welsh Carson Anderson & Stowe (the "WCAS Purchasers"), Tower
                  Parent Corp., Gupton, Eckert, Stephen H. Clark ("Clark") and
                  David P. Tomick ("Tomick"). Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403
</TABLE>


                                      28
<PAGE>   32
<TABLE>
<CAPTION>
    EXHIBIT
     NUMBER                           DESCRIPTION
    -------                           -----------
<S>              <C>
      10.6        Third Amended and Restated Stockholders' Agreement, dated as
                  of April 20, 1999, by and among the Registrant, Whitney
                  Equity, Whitney III, Whitney Strategic, Waller-Sutton, Kitty
                  Hawk III, Kitty Hawk IV, Eagle Creek, Clark, Tomick, Finely
                  LP, NCEF, the CIBC Purchasers, the WCAS Purchasers, Tower
                  Parent Corp., Edward Lutkewich ("Lutkewich"), Jackman,
                  Eckert, and Gupton. Incorporated by reference to the
                  corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403

     10.7         Employment Agreement with Clark.  Incorporated by reference
                  to the corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403

     10.8         Employment Agreement with Tomick.  Incorporated by reference
                  to the corresponding exhibit to the Registrant's registration
                  statement on Form S-4, file no. 333-67403

     10.9         Employment Agreement with Richard J. Byrne.  Incorporated by
                  reference to the corresponding exhibit to the Registrant's
                  registration statement on Form S-4, file no. 333-67403

    10.10         Credit Agreement, dated as of April 20, 1999, by and among
                  the Registrant, SCI, CIBC Oppenheimer Corp., Credit Suisse
                  First Boston Corporation and the other parties thereto (the
                  "Credit Agreement"). Incorporated by reference to exhibit no.
                  10.1 to the Registrant's registration statement on Form 8-A
                  filed on September 1, 1999

    10.11         SpectraSite Holdings, Inc. Stock Incentive Plan.
                  Incorporated by reference to the exhibit no. 10.16 to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.12         SpectraSite Holdings, Inc. Employee Stock Purchase Plan.
                  Incorporated by reference to the exhibit no. 10.17 to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.13         Agreement, dated September 15, 1998, by and between Robert M.
                  Long and the Registrant.  Incorporated by reference to
                  exhibit no. 10.22 to the Registrant's registration statement
                  on Form S-4, file no. 333-67403

    10.14         Asset Purchase Agreement, dated as of August 14, 1998 by and
                  among Airadigm Communications, Inc. ("Airadigm") and SCI.
                  Incorporated by reference to exhibit no. 10.23 to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.15         Form of Master Tower Attachment Lease Agreement by and
                  between Airadigm and SCI. Incorporated by reference to
                  exhibit no. 10.24 to the Registrant's registration statement
                  on Form S-4, file no. 333-67403

    10.16         Asset Purchase, dated as of August 20, 1998, by and among
                  Amica Wireless Phone Service, Inc. ("Amica") and SCI.
                  Incorporated by reference to exhibit no. 10.25 to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.17         Form of Master Design Build Lease Agreement by and between
                  Amica and SCI. Incorporated by reference to exhibit no. 10.26
                  to the Registrant's registration statement on Form S-4, file
                  no. 333-67403
</TABLE>


                                      29
<PAGE>   33


<TABLE>
<CAPTION>
    EXHIBIT
     NUMBER                           DESCRIPTION
    -------                           -----------
<S>              <C>
    10.18         Preferred Stock Purchase Agreement (Series C Preferred
                  Stock), dated as of February 10, 1999, by and among
                  SpectraSite Holdings, Inc., the WCAS Purchasers, the Whitney
                  Purchasers, the CIBC Purchasers and the Additional
                  Purchasers. Incorporated by reference to exhibit no. 10.30 to
                  the Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.19         First Amendment to Preferred Stock Purchase Agreement (Series
                  C Preferred Stock). Incorporated by reference to exhibit no.
                  10.31 to the Registrant's registration statement on Form S-4,
                  file no. 333-67403

    10.20         Security & Subordination Agreement, dated as of April
                  20,1999. Incorporated by reference to exhibit no. 10.32 to
                  the Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.21         Master Site Commitment Agreement, dated as of April 20, 1999.
                  Incorporated by reference to exhibit no. 10.33 to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.22         Master Site Lease Agreement, dated as of April 20, 1999.
                  Incorporated by reference to exhibit no. 10.34 to the
                  Registrant's registration statement on Form S-4, file no.
                  333-67403

    10.23         Employment Agreement with Calvin J. Payne.  Incorporated by
                  referenced to exhibit 10.1 to the Registrant's report on Form
                  8-K, dated September 2, 1999 and filed September 17, 1999

    10.24         Joinder Agreement to SpectraSite Restated Registration Rights
                  Agreement. Incorporated by reference to exhibit no. 10.36 to
                  the Registrant's registration statement on Form S-1, file no.
                  333-93873

    10.25         First Amendment to the Credit Agreement, dated as of August
                  23, 1999. Incorporated by reference to exhibit 10.2 to the
                  Registrant's report on Form 8-K, dated September 2, 1999 and
                  filed September 17, 1999

    10.26         Second Amendment to the Credit Agreement, dated as of
                  December 22, 1999.

    10.27         Third Amendment to the Credit Agreement, dated as of February
                  14, 2000.

     21.1         Subsidiaries of the Registrant

     23.1         Consent of Ernst & Young LLP

     27.1         Financial Data Schedule

     99.1         Unaudited Pro Forma Financial Data
</TABLE>

         (b)  Reports on Form 8-K filed during the quarter ended December 31,
              1999:

                  None.

                                      30

<PAGE>   34

                         INDEX TO FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                                                            PAGE
                                                                                                            -------
<S>                                                                                                        <C>
Report of Independent Auditors                                                                               F-2
Consolidated Balance Sheets as of  December 31, 1998 and December 31, 1999...........................        F-3
Consolidated Statements of Operations for the period from inception (April 25,
  1997) to December 31, 1997 and for the years ended December 31, 1998 and 1999......................        F-4

Consolidated Statements of Redeemable Convertible Preferred Stock and Shareholders'
  Deficiency.........................................................................................        F-5
Consolidated Statements of Cash Flows for the period from inception (April 25,
  1997) to December 31, 1997 and for the years ended December 31, 1998 and 1999......................        F-6

Notes to Consolidated Financial Statements...........................................................        F-7
TELESITE SERVICES, LLC
Report of Independent Auditors.......................................................................        F-24
Consolidated Balance Sheet as of December 31, 1996...................................................        F-25
Consolidated Statements of Operations for the year ended December 31, 1996 and
  for the period from January 1, 1997 through May 12, 1997...........................................        F-26
Consolidated Statements of Members' Equity...........................................................        F-27
Consolidated Statements of Cash Flows for the year ended December 31, 1996 and for
  the period from January 1, 1997 through May 12, 1997...............................................        F-28
Notes to Consolidated Financial Statements...........................................................        F-29
</TABLE>


                                      F-1
<PAGE>   35

                         REPORT OF INDEPENDENT AUDITORS

Board of Directors
SpectraSite Holdings, Inc. and Subsidiaries

     We have audited the accompanying consolidated balance sheets of SpectraSite
Holdings, Inc. and subsidiaries as of December 31, 1998 and 1999 and the related
consolidated statements of operations, redeemable convertible preferred stock
and shareholders' equity (deficiency) and cash flows for the years ended
December 31, 1998 and 1999 and for the period from April 25, 1997 (inception) to
December 31, 1997. These financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

     We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and perform
the audits to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of SpectraSite
Holdings, Inc. and subsidiaries at December 31, 1998 and 1999 and the
consolidated results of its operations and its cash flows for the years ended
December 31, 1998 and 1999 and for the period from April 25, 1997 (inception) to
December 31, 1997 in conformity with accounting principles generally accepted in
the United States.

                                          /s/ ERNST & YOUNG LLP

February 14, 2000
Raleigh, North Carolina

                                       F-2
<PAGE>   36

                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                               AS OF DECEMBER 31,
                                                              ---------------------
                                                                1998        1999
                                                              --------   ----------
<S>                                                           <C>        <C>
ASSETS
Current assets:
  Cash and cash equivalents.................................  $ 99,548   $   37,778
  Short-term investments....................................    15,414           --
  Accounts receivable, net of allowance of $0 and $1,530....     3,353       31,785
  Costs and estimated earnings in excess of billings........        --       11,545
  Inventories...............................................        --        4,083
  Prepaid expenses and other................................       253        4,353
                                                              --------   ----------
Total current assets........................................   118,568       89,544
Property and equipment, net.................................    28,469      763,757
Goodwill and other intangible assets, net...................    12,757      307,197
Other assets................................................     2,152       59,455
                                                              --------   ----------
Total assets................................................  $161,946   $1,219,953
                                                              ========   ==========
LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIENCY)
Current liabilities:
  Accounts payable..........................................  $  1,635   $   21,230
  Accrued and other expenses................................       809       16,942
  Billings in excess of costs and estimated earnings........        --        5,247
                                                              --------   ----------
Total current liabilities...................................     2,444       43,419
Long-term debt..............................................        --      202,527
Other long-term liabilities.................................       224           --
Senior discount notes.......................................   132,689      516,251
                                                              --------   ----------
Total liabilities...........................................   135,357      762,197
                                                              --------   ----------
Series A redeemable convertible preferred stock, $0.001 par,
  3,462,830 shares authorized, and 3,462,830 outstanding,
  stated at liquidation value...............................    11,300           --
                                                              --------   ----------
Series B redeemable convertible preferred stock, $0.001 par,
  7,000,000 shares authorized, and 7,000,000 outstanding,
  stated at liquidation value...............................    29,356           --
                                                              --------   ----------
Shareholders' equity (deficiency):
  Series A convertible preferred stock, $0.001 par,
     3,462,830 shares authorized and outstanding, stated at
     liquidation value......................................        --       10,000
  Series B convertible preferred stock, $0.001 par,
     7,000,000 shares authorized and outstanding, stated at
     liquidation value......................................        --       28,000
  Series C convertible preferred stock, $0.001 par,
     60,286,795 shares authorized and outstanding, stated at
     liquidation value......................................        --      301,494
  Common stock, $0.001 par, 20,000,000 and 300,000,000
     authorized, respectively, 956,753 and 20,191,604 issued
     and outstanding, respectively..........................         1           20
  Additional paid-in-capital................................        --      230,546
  Accumulated other comprehensive income....................        --          192
  Accumulated deficit.......................................   (14,068)    (112,496)
                                                              --------   ----------
Total shareholders' equity (deficiency).....................   (14,067)     457,756
                                                              --------   ----------
Total liabilities, redeemable preferred stock and
  shareholders' equity (deficiency).........................  $161,946   $1,219,953
                                                              ========   ==========
</TABLE>

                                       F-3
<PAGE>   37

                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                   PERIOD FROM
                                                    INCEPTION            YEAR           YEAR
                                               (APRIL 25, 1997) TO      ENDED          ENDED
                                                  DECEMBER 31,       DECEMBER 31,   DECEMBER 31,
                                                      1997               1998           1999
                                               -------------------   ------------   ------------
<S>                                            <C>                   <C>            <C>
Revenues:
  Site leasing...............................        $    --           $    656       $ 46,515
  Network services...........................          5,002              8,142         53,570
                                                     -------           --------       --------
Total revenues...............................          5,002              8,798        100,085
                                                     -------           --------       --------
Operating expenses:
  Cost of operations, excluding depreciation
     and amortization expense:
       Site leasing..........................             --                299         17,825
       Network services......................          1,120              2,492         36,489
Selling, general and administrative
  expenses...................................          7,390              9,690         38,182
Depreciation and amortization expense........            489              1,268         37,976
Restructuring and non-recurring charges......             --                 --          7,727
                                                     -------           --------       --------
Total operating expenses.....................          8,999             13,749        138,199
                                                     -------           --------       --------
Operating loss...............................         (3,997)            (4,951)       (38,114)
                                                     -------           --------       --------
Other income (expense):
  Interest income............................            122              3,569          8,951
  Interest expense...........................           (164)            (8,170)       (67,513)
  Other income (expense).....................            149                473           (424)
                                                     -------           --------       --------
Total other income (expense).................            107             (4,128)       (58,986)
                                                     -------           --------       --------
Loss before income taxes.....................         (3,890)            (9,079)       (97,100)
Income tax expense...........................             --                 --            568
                                                     -------           --------       --------
Net loss.....................................        $(3,890)          $ (9,079)      $(97,668)
                                                     =======           ========       ========
Loss applicable to common shareholders:
Net loss.....................................        $(3,890)          $ (9,079)      $(97,668)
Accretion of redemption value of preferred
  stock......................................           (500)            (2,156)          (760)
                                                     -------           --------       --------
Net loss applicable to common shareholders...        $(4,390)          $(11,235)      $(98,428)
                                                     =======           ========       ========
Net loss per common share:
  Basic and diluted..........................        $ (5.21)          $ (11.98)      $ (12.48)
                                                     =======           ========       ========
Weighted average common shares outstanding:
  Basic and diluted..........................            842                938          7,886
                                                     =======           ========       ========
</TABLE>

                                       F-4
<PAGE>   38
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENT OF REDEEMABLE
       CONVERTIBLE PREFERRED STOCK AND SHAREHOLDERS' EQUITY (DEFICIENCY)
                             (DOLLARS IN THOUSANDS)
<TABLE>
<CAPTION>
           REDEEMABLE CONVERTIBLE PREFERRED STOCK                        SHAREHOLDERS' EQUITY (DEFICIENCY)
           --------------------------------------
                              REDEEMABLE        REDEEMABLE
                              CONVERTIBLE       CONVERTIBLE       CONVERTIBLE       CONVERTIBLE       CONVERTIBLE
                            PREFERRED STOCK   PREFERRED STOCK   PREFERRED STOCK   PREFERRED STOCK   PREFERRED STOCK
                               SERIES A          SERIES B          SERIES A          SERIES B          SERIES C
                            ---------------   ---------------   ---------------   ---------------   ---------------
<S>                         <C>               <C>               <C>               <C>               <C>
Balance at April 25, 1997
 (inception)..............     $     --          $     --           $    --           $    --          $     --
Issuance of common
 stock....................           --                --                --                --                --
Issuance of warrants......           --                --                --                --                --
Issuance of preferred
 stock....................       10,000                --                --                --                --
Stock issuance costs......           --                --                --                --                --
Accretion of redemption
 value....................          500                --                --                --                --
Net loss..................           --                --                --                --                --
                               --------          --------           -------           -------          --------
Balance at December 31,
 1997.....................       10,500                --                --                --                --
Exercise of warrants......           --                --                --                --                --
Issuance of preferred
 stock....................           --            28,000                --                --                --
Stock issuance costs......           --                --                --                --                --
Accretion of redemption
 value....................          800             1,356                --                --                --
Repurchase of common
 stock....................           --                --                --                --                --
Net loss..................           --                --                --                --                --
                               --------          --------           -------           -------          --------
Balance at December 31,
 1998.....................       11,300            29,356                --                --                --
Net loss..................           --                --                --                --                --
Foreign currency
 translation adjustment...           --                --                --                --                --
Total comprehensive
 loss.....................
Issuance of common
 stock....................           --                --                --                --                --
Stock issuance costs......           --                --                --                --                --
Issuance of Series C
 preferred stock..........           --                --                --                --           301,494
Accretion of redemption
 value....................          200               560                --                --                --
Cancellation of redemption
 status of preferred
 stock....................      (11,500)          (29,916)           10,000            28,000                --
                               --------          --------           -------           -------          --------
Balance at December 31,
 1999.....................     $     --          $     --           $10,000           $28,000          $301,494
                               ========          ========           =======           =======          ========
<CAPTION>
           REDEEMABLE
           CONVERTIBLE                       SHAREHOLDERS' EQUITY (DEFICIENCY)
           ---------------                   ---------------------------------
                                                                                ACCUMULATED
                               COMMON STOCK       ADDITIONAL   COMPREHENSIVE       OTHER
                            -------------------    PAID-IN        INCOME       COMPREHENSIVE   ACCUMULATED
                              SHARES     AMOUNT    CAPITAL        (LOSS)          INCOME         DEFICIT      TOTAL
                            ----------   ------   ----------   -------------   -------------   -----------   --------
<S>                         <C>          <C>      <C>          <C>             <C>             <C>           <C>
Balance at April 25, 1997
 (inception)..............          --    $ --     $     --                        $ --         $      --    $     --
Issuance of common
 stock....................     931,753       1        2,281                          --                --       2,282
Issuance of warrants......          --      --          390                          --                --         390
Issuance of preferred
 stock....................          --      --           --                          --                --          --
Stock issuance costs......          --      --         (180)                         --                --        (180)
Accretion of redemption
 value....................          --      --         (500)                         --                --        (500)
Net loss..................          --      --           --      $ (3,890)           --            (3,890)     (3,890)
                            ----------    ----     --------      ========          ----         ---------    --------
Balance at December 31,
 1997.....................     931,753       1        1,991                          --            (3,890)     (1,898)
Exercise of warrants......     150,000      --           --                          --                --          --
Issuance of preferred
 stock....................          --      --           --                          --                --          --
Stock issuance costs......          --      --         (434)                         --                --        (434)
Accretion of redemption
 value....................          --      --       (1,557)                         --              (599)     (2,156)
Repurchase of common
 stock....................    (125,000)     --           --                          --              (500)       (500)
Net loss..................          --      --           --      $ (9,079)           --            (9,079)     (9,079)
                            ----------    ----     --------      ========          ----         ---------    --------
Balance at December 31,
 1998.....................     956,753       1           --                                       (14,068)    (14,067)
Net loss..................          --      --           --      $(97,668)           --           (97,668)    (97,668)
Foreign currency
 translation adjustment...          --      --           --           192           192                --         192
                                                                 --------
Total comprehensive
 loss.....................                                       $(97,476)
                                                                 ========
Issuance of common
 stock....................  19,234,851      19      233,844                          --                --     233,863
Stock issuance costs......          --      --       (6,714)                         --                --      (6,714)
Issuance of Series C
 preferred stock..........          --      --           --                          --                --     301,494
Accretion of redemption
 value....................          --      --           --                          --              (760)       (760)
Cancellation of redemption
 status of preferred
 stock....................          --      --        3,416                          --                --      41,416
                            ----------    ----     --------                        ----         ---------    --------
Balance at December 31,
 1999.....................  20,191,604    $ 20     $230,546                        $192         $(112,496)   $457,756
                            ==========    ====     ========                        ====         =========    ========
</TABLE>

                                       F-5
<PAGE>   39

                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                     PERIOD FROM INCEPTION
                                                      (APRIL 25, 1997) TO       YEAR ENDED          YEAR ENDED
                                                       DECEMBER 31, 1997     DECEMBER 31, 1998   DECEMBER 31, 1999
                                                     ---------------------   -----------------   -----------------
<S>                                                  <C>                     <C>                 <C>
OPERATING ACTIVITIES
Net loss...........................................         $(3,890)             $ (9,079)           $ (97,668)
Adjustments to reconcile net loss to net cash
  provided by (used in) operating activities:
  Depreciation.....................................             191                   712               31,967
  Amortization of goodwill and other intangibles...             298                   556                6,009
  Amortization of debt issuance costs..............              --                   244                3,086
  Non-cash financing charge........................              --                    --                9,000
  Loss (gain) on sale of assets....................              60                  (473)                  95
  Amortization of discount--senior discount
    notes..........................................              --                 7,689               43,558
  Non-cash compensation charges....................           2,600                    --                  350
  Write-off of goodwill............................              --                    --                6,178
  Equity in net loss of an affiliate...............              --                    --                  408
Changes in operating assets and liabilities, net of
  acquisitions:
  Accounts receivable..............................            (289)               (1,451)              (8,535)
  Interest receivable on short-term investments....              --                  (759)                  --
  Costs and estimated earnings in excess of
    billings.......................................              --                    --               (4,240)
  Inventories......................................              --                    --                1,526
  Prepaid expenses and other.......................             136                  (164)              (4,024)
  Accounts payable.................................             317                   591               11,457
  Other current liabilities........................           1,005                  (213)              18,388
  Other, net.......................................            (205)                   --                   --
                                                            -------              --------            ---------
Net cash provided by (used in) operating
  activities.......................................             223                (2,347)              17,555
                                                            -------              --------            ---------
INVESTING ACTIVITIES
Purchases of property and equipment................            (850)              (26,598)            (644,778)
Acquisitions, net of cash acquired.................          (5,028)               (1,989)            (128,414)
Proceeds from note receivable......................              --                    41                  142
Issuance of note receivable........................              --                    --                 (500)
Investment in affiliates...........................              --                    --               (4,167)
Loan to affiliate..................................              --                    --               (2,875)
Distribution from affiliate........................              --                   150                   --
Purchases of investments...........................              --               (30,005)                  --
Maturities of short-term investments...............              --                15,350               15,414
Proceeds from sale of assets.......................              --                   299                   22
Repurchase of common stock.........................              --                  (500)                  --
Deposits on acquisitions...........................          (1,300)               (1,750)             (48,069)
                                                            -------              --------            ---------
Net cash used in investing activities..............          (7,178)              (45,002)            (813,225)
                                                            -------              --------            ---------
FINANCING ACTIVITIES
Proceeds from issuance of preferred stock..........          10,000                28,000              231,494
Proceeds from issuance of common stock.............              --                    --                1,007
Stock issuance costs...............................            (179)                 (434)              (6,714)
Proceeds from issuance of long-term debt...........              --                    --              200,000
Proceeds from issuance of senior discount notes....              --               125,000              340,004
Debt issuance costs................................              --                (4,836)             (29,307)
Net repayments on line of credit...................            (568)                 (628)                  --
Repayment of note to shareholder and other debt....             (64)               (2,439)              (2,584)
                                                            -------              --------            ---------
Net cash provided by financing activities..........           9,189               144,663              733,900
                                                            -------              --------            ---------
Net increase (decrease) in cash and cash
  equivalents......................................           2,234                97,314              (61,770)
Cash and cash equivalents at beginning of period...              --                 2,234               99,548
                                                            -------              --------            ---------
Cash and cash equivalents at end of period.........         $ 2,234              $ 99,548            $  37,778
                                                            =======              ========            =========
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for interest...........         $    64              $    216            $   9,019
                                                            =======              ========            =========
SUPPLEMENTAL DISCLOSURES OF NON CASH INVESTING AND
  FINANCING ACTIVITIES
Common stock issued for acquisitions...............         $    --              $    224            $ 217,855
                                                            =======              ========            =========
Series C preferred stock issued for purchase of
  property and equipment...........................         $    --              $     --            $  70,000
                                                            =======              ========            =========
</TABLE>

                                       F-6
<PAGE>   40

                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES

  FORMATION OF COMPANY

     SpectraSite Holdings, Inc. ("SpectraSite") and its wholly owned
subsidiaries (collectively referred to as the "Company"), are principally
engaged in providing services to companies operating in the telecommunications
industry, including leasing antenna sites on multi-tenant towers, network
design, tower construction and antenna installation throughout the United States
and Canada.

     SpectraSite, formerly known as Integrated Site Development, Inc. ("ISD"),
was incorporated in the State of Delaware on April 25, 1997. On May 12, 1997,
SpectraSite issued 850,000 shares of its common stock and warrants to purchase
150,000 shares of common stock in exchange for the 850,000 issued and
outstanding shares of common stock and warrants to purchase 150,000 shares of
common stock of US Towers, Inc. ("UST"). SpectraSite's chief executive officer
was the principal shareholder of UST prior to this transaction. One of the
primary purposes of the exchange of shares was the hiring of the chief executive
officer. Since UST had minimal assets and operations, this transaction was
compensatory in nature, rather than a business combination or an asset
acquisition. Accordingly, this transaction resulted in a non-cash compensation
charge of $2.6 million based on the estimated fair value of the stock of $2.60
per share and the estimated fair value of the warrants of $2.60 per warrant at
the date of issuance. The warrants entitled the holder to the right to purchase
150,000 shares of SpectraSite common stock at a price of $0.001 per share,
through 2001. In September and October 1998, all of the warrants were exercised.

     On May 12, 1997, SpectraSite acquired all of the outstanding membership
interests of TeleSite Services, LLC ("TeleSite") and its subsidiary, MetroSite
Management, LLC ("MetroSite"), for consideration including $4.9 million in cash,
81,753 shares of common stock valued at $0.2 million and a $2.3 million note
payable. Since SpectraSite had minimal operations prior to this acquisition,
TeleSite is considered SpectraSite's predecessor for financial reporting
purposes. In October 1997, TeleSite was merged into UST, and UST changed its
name to SpectraSite Communications, Inc. The acquisition was accounted for as a
purchase in accordance with the provisions of APB 16 and, accordingly, the
results of operations of TeleSite are included in the consolidated operations of
the Company from the date of acquisition.

     In connection with the TeleSite acquisition, SpectraSite was required to
provide additional consideration of 55,919 shares of its common stock based upon
TeleSite achieving certain operating goals through the end of December 31, 1998,
pursuant to a provision in the TeleSite acquisition agreement. The Company
accounted for the obligation as an additional cost of the acquisition, recording
approximately $0.2 million of goodwill and a related long-term liability based
upon the fair value of the Company's common stock at December 31, 1998. During
1999, this obligation was satisfied by the issuance of 55,919 shares of common
stock valued at $0.2 million.

  PRINCIPLES OF CONSOLIDATION

     The accompanying consolidated financial statements include the accounts of
SpectraSite and its subsidiaries. All significant intercompany transactions and
balances have been eliminated in consolidation.

  USE OF ESTIMATES

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.

                                       F-7
<PAGE>   41
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  CASH AND CASH EQUIVALENTS

     The Company considers all highly liquid investments with a maturity of
three months or less when purchased to be cash equivalents.

  SHORT-TERM INVESTMENTS

     At December 31, 1998, the Company's short-term investments consisted of
commercial paper and certificates of deposit with maturities of less than one
year. The carrying amount of these investments approximated market value.

  REVENUE RECOGNITION

     Site leasing revenues are recognized when earned. Escalation clauses
present in the lease agreements with the Company's customers are recognized on a
straight-line basis over the term of the lease. Network service revenues from
site selection, construction and construction management activities are derived
under service contracts with customers which provide for billing on a time and
materials or fixed price basis. Revenues are recognized as services are
performed with respect to time and materials contracts. Revenues are recognized
using the percentage-of-completion method for fixed price contracts, measured by
the percentage of contract costs incurred to date compared to estimated total
contract costs. Costs and estimated earnings in excess of billings on
uncompleted contracts represent revenues recognized in excess of amounts billed.
Billings in excess of costs and estimated earnings on uncompleted contracts
represent billings in excess of revenues recognized. Provisions for estimated
losses on uncompleted contracts are made in the period in which such losses are
determined.

  INVENTORIES

     Inventories are stated at the lower of cost or market using the first-in,
first-out method and consist primarily of materials purchased for future
construction not associated with specific jobs.

  INVESTMENTS

     An investment in an entity in which the Company owns more than 20% but less
than 50% is accounted for using the equity method and is included in other
assets. Under the equity method, the investment is stated at cost plus the
Company's equity in net income (loss) of the entity since acquisition. The
equity in net income (loss) of such entity is recorded in "Other income
(expense)" in the accompanying consolidated statements of operations. An
investment in an entity in which the Company owns less than 20% is accounted for
using the cost method and is included in other assets.

  PROPERTY AND EQUIPMENT

     Property and equipment, including towers, are stated at cost. The Company
capitalizes costs incurred in bringing towers to an operational state. Direct
costs related to the development and construction of towers, including interest,
are capitalized and are included in construction in progress. Approximately $0.1
million and $1.1 million of interest was capitalized for the years ended
December 31, 1998 and 1999, respectively. Depreciation is computed using the
straight-line method over the estimated useful lives of the assets ranging from
three to fifteen years.

  GOODWILL

     The Company has classified as goodwill the cost in excess of fair value of
net assets acquired in purchase transactions. Goodwill is being amortized on a
straight-line basis over fifteen years. On an on going basis, the

                                       F-8
<PAGE>   42
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Company assesses the recoverability of its goodwill by determining its ability
to generate future cash flows sufficient to recover the unamortized balance over
the remaining useful life. Goodwill determined to be unrecoverable based on
future cash flows would be written-off in the period in which such determination
is made.

  DEBT ISSUANCE COSTS

     The Company capitalized costs relating to the issuance of long-term debt
and senior discount notes. The costs are amortized using the straight-line
method over the term of the related debt.

  INCOME TAXES

     The liability method is used in accounting for income taxes and deferred
tax assets and liabilities are determined based on differences between the
financial reporting and tax basis of assets and liabilities.

  FINANCIAL INSTRUMENTS

     The carrying amount of cash and cash equivalents, short-term investments
and the credit facility approximates fair value for these instruments. The
estimated fair value of the senior discount notes is based on the quoted market
price. The estimated fair values of the Company's financial instruments, along
with the carrying amounts of the related assets (liabilities), are as follows:

<TABLE>
<CAPTION>
                         DECEMBER 31, 1997       DECEMBER 31, 1998         DECEMBER 31, 1999
                         ------------------    ----------------------    ----------------------
                         CARRYING     FAIR     CARRYING       FAIR       CARRYING       FAIR
                          AMOUNT     VALUE      AMOUNT        VALUE       AMOUNT        VALUE
                         --------    ------    ---------    ---------    ---------    ---------
                                                     (IN THOUSANDS)
<S>                      <C>         <C>       <C>          <C>          <C>          <C>
Cash and cash
  equivalents..........   $2,234     $2,234    $  99,548    $  99,548    $  37,778    $  37,778
Short-term
  investments..........       --         --       15,414       15,414           --           --
12% Senior Discount
  Notes due 2008.......       --         --     (132,689)    (114,871)    (149,137)    (132,890)
11.25 % Senior Discount
  Notes Due 2009.......       --         --           --           --     (367,114)    (312,471)
Credit Facility........       --         --           --           --     (200,000)    (200,000)
</TABLE>

  EARNINGS PER SHARE

     Basic and diluted earnings per share are calculated in accordance with
Statement of Financial Accounting Standards No. 128 "Earnings per Share." The
Company has potential common stock equivalents related to its convertible
preferred stock and outstanding stock options. These potential common stock
equivalents were not included in diluted earnings per share for all periods
because the effect would have been antidilutive. Accordingly, basic and diluted
net loss per share are the same for all periods presented.

  COSTS OF OPERATIONS

     Costs of operations for network services consist of direct costs incurred
to provide the related services excluding depreciation and amortization expense.
Costs of operations for site leasing consist of direct costs incurred to provide
the related services including ground lease cost, tower maintenance and related
real estate taxes. Costs of operations for site leasing do not include
depreciation expense of the related leased assets.

                                     F-9
<PAGE>   43
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  SIGNIFICANT CUSTOMERS

     The Company's customer base consists of businesses operating in the
wireless telecommunications industry. The Company's exposure to credit risk
consists primarily of unsecured accounts receivable from these customers. Five
customers accounted for 96.6% of the Company's 1997 revenue. Two customers
accounted for 70.9% of the Company's 1998 revenue. Following is a list of
significant customers:

<TABLE>
<CAPTION>
                           PERCENT OF
                            REVENUES
                       FOR THE PERIOD FROM                         PERCENT OF REVENUES      PERCENT OF
                         APRIL 25, 1997      PERCENT OF ACCOUNTS      FOR THE YEAR           ACCOUNTS
                         (INCEPTION) TO         RECEIVABLE AT             ENDED            RECEIVABLE AT
                        DECEMBER 31, 1997     DECEMBER 31, 1997     DECEMBER 31, 1998    DECEMBER 31, 1998
                       -------------------   -------------------   -------------------   -----------------
<S>                    <C>                   <C>                   <C>                   <C>
Customer 1...........         38.9%                 75.0%                 46.6%                15.6%
Customer 2...........         18.8%                   --                    --                   --
Customer 3...........         14.7%                   --                    --                   --
Customer 4...........         13.0%                   --                    --                   --
Customer 5...........         11.2%                   --                    --                   --
Customer 6...........           --                    --                  24.3%                45.0%
Customer 7...........           --                    --                    --                 22.7%
</TABLE>

     In the year ended December 31,1999, one customer, which is a significant
shareholder of the Company, accounted for 35.0% of the Company's revenues.

  RESTRUCTURING AND NON-RECURRING CHARGES

     In September 1999, the Company announced that it would no longer directly
provide site acquisition services. As a result, the Company recorded
restructuring charges of $7.1 million, of which $6.2 million related to the
write-off of goodwill related to the purchase of TeleSite and $0.9 million was
related to the cost of employee severance. In March 1999, the Company announced
that it would relocate its marketing and administrative operations from Little
Rock, Arkansas and Birmingham, Alabama to its corporate headquarters in Cary,
North Carolina. As a result, the Company recorded a non-recurring charge of $0.6
million for employee termination and other costs related to the relocation of
these activities.

  STOCK OPTIONS

     The Company has elected under the provisions of Statement of Financial
Accounting Standards No. 123, "Accounting for Stock Based Compensation" ("SFAS
123") to account for its employee stock options in accordance with Accounting
Principle Board Opinion No. 25, "Accounting for Stock Issued to Employees" ("APB
25"). Companies that account for stock based compensation arrangements for its
employees under APB No. 25 are required by SFAS 123 to disclose the pro forma
effect on net income (loss) as if the fair value based method prescribed by SFAS
123 had been applied. The Company plans to continue to account for stock based
compensation using the provisions of APB 25 and has adopted the disclosure
requirements of SFAS 123.

  IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS

     In 1998, the Company adopted Statement of Financial Accounting Standards
No. 130, "Reporting Comprehensive Income" ("SFAS 130"), which establishes
standards for reporting and display of comprehensive income and its components
in a full set of general-purpose financial statements. SFAS 130 only impacts
financial statement presentation as opposed to actual amounts recorded. Other
comprehensive income includes all nonowner changes in equity that are excluded
from net income. During the period from

                                      F-10
<PAGE>   44
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

inception (April 25, 1997) to December 31, 1997 and during the year ended
December 31, 1998, the Company had no items of other comprehensive income.
During the year ended December 31, 1999, the Company had other comprehensive
income related to foreign currency translation adjustments.

     In 1998, the Company adopted Statement of Financial Accounting Standards
No. 131, "Disclosures about Segments of an Enterprise and Related Information"
("SFAS 131"). SFAS 131 changes the way public companies report segment
information in annual financial statements and also requires those companies to
report selected segment information in interim financial statements to
shareholders. SFAS 131 also establishes standards for related disclosures about
products and services, geographic areas, and major customers. The application of
the new rules did not have a significant impact on the Company's financial
position at December 31, 1998 or its results of operations for the year ended
December 31, 1998 as the Company operated in only one segment. During 1999, the
Company commenced operations in a second business segment.

     In June 1998, the FASB issued Statement of Financial Accounting Standards
No. 133, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
133"). SFAS 133 requires that derivative instruments be recognized as either
assets or liabilities in the consolidated balance sheet based on their fair
values. Changes in the fair values of such derivative instruments will be
recorded either in results of operations or in other comprehensive income,
depending on the intended use of the derivative instrument. The initial
application of SFAS 133 will be reported as the effect of a change in accounting
principle. SFAS 133 is effective for all fiscal years beginning after June 15,
2000. We have not yet determined the effect that the adoption of SFAS 133 will
have on our consolidated financial statements.

  RECLASSIFICATIONS

     Certain reclassifications have been made to the 1997 and 1998 consolidated
financial statements to conform to the 1999 presentation. These
reclassifications had no effect on net loss or shareholders' deficiency as
previously reported.

2.  LONG-LIVED ASSETS

     Property and equipment consist of the following:

<TABLE>
<CAPTION>
                                                  DECEMBER 31,   DECEMBER 31,
                                                      1998           1999
                                                  ------------   ------------
                                                        (IN THOUSANDS)
<S>                                               <C>            <C>
Towers..........................................    $24,780        $723,075
Equipment.......................................        823           9,884
Furniture and fixtures..........................        288           2,256
Other...........................................        212          15,240
                                                    -------        --------
                                                     26,103         750,455
Less accumulated depreciation...................       (870)        (32,837)
                                                    -------        --------
                                                     25,233         717,618
Construction in progress........................      3,236          46,139
                                                    -------        --------
Property and equipment, net.....................    $28,469        $763,757
                                                    =======        ========
</TABLE>

                                      F-11
<PAGE>   45
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Goodwill and other intangible assets consist of the following:

<TABLE>
<CAPTION>
                                                  DECEMBER 31,   DECEMBER 31,
                                                      1998           1999
                                                  ------------   ------------
                                                        (IN THOUSANDS)
<S>                                               <C>            <C>
Goodwill........................................    $ 8,963        $280,666
Debt issuance costs.............................      4,836          33,955
                                                    -------        --------
                                                     13,799         314,621
Less accumulated amortization...................     (1,042)         (7,424)
                                                    -------        --------
                                                    $12,757        $307,197
                                                    =======        ========
</TABLE>

     Other assets consist of the following:

<TABLE>
<CAPTION>
                                                  DECEMBER 31,   DECEMBER 31,
                                                      1998           1999
                                                  ------------   ------------
                                                        (IN THOUSANDS)
<S>                                               <C>            <C>
Deposits........................................     $1,750        $49,153
Other...........................................        402         10,302
                                                     ------        -------
                                                     $2,152        $59,455
                                                     ======        =======
</TABLE>

3.  DEBT

  11.25% SENIOR DISCOUNT NOTES DUE 2009

     In April 1999, the Company issued $586.8 million aggregate principal amount
at maturity of senior discount notes due 2009 (the "2009 Notes") for gross
proceeds of $340.0 million. Interest on the 2009 Notes accretes daily at a rate
of 11.25% per annum, compounded semiannually, to an aggregate principal amount
of $586.8 million on April 15, 2004. Cash interest will not accrue on the 2009
Notes prior to April 15, 2004. Commencing April 15, 2004, cash interest will
accrue and be payable semiannually in arrears on each April 15 and October 15,
commencing October 15, 2004, at a rate of 11.25% per annum. After April 15,
2004, the Company may redeem all or a portion of the 2009 Notes at specified
redemption prices, plus accrued and unpaid interest, to the applicable
redemption date. On one or more occasions prior to April 15, 2002, the Company
may redeem up to 35% of the aggregate principal amount at maturity of the 2009
Notes with the net cash proceeds from one or more equity offerings. The
redemption price would be 111.25% of the accreted value on the redemption date.
The Company is required to comply with certain covenants under the terms of the
2009 Notes that restrict the Company's ability to incur additional indebtedness,
make certain payments and issue preferred stock, among other things.

  12% SENIOR DISCOUNT NOTES DUE 2008

     In June 1998, the Company issued $225.2 million aggregate principal amount
at maturity of senior discount notes due 2008 (the "2008 Notes") for gross
proceeds of $125.0 million. The 2008 Notes accrete daily at a rate of 12% per
annum, compounded semiannually, to an aggregate principal amount of $225.2
million on July 15, 2003. Cash interest will not accrue on the 2008 Notes prior
to July 15, 2003. Commencing July 15, 2003, cash interest will accrue and be
payable semiannually in arrears on each January 15 and July 15, commencing
January 15, 2004, at a rate of 12% per annum. After July 15, 2003, the Company
may redeem all or a portion of the 2008 Notes at specified redemption prices,
plus accrued and unpaid interest, to the applicable redemption date. On one or
more occasions prior to July 15, 2001, the Company may redeem up to 25% of the
aggregate principal amount at maturity of the 2008 Notes issued with the net
cash proceeds from one or more equity offerings. The redemption price would be
112% of the accreted value on the redemption

                                      F-12
<PAGE>   46
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

date. The Company is required to comply with certain covenants under the terms
of the 2008 Notes that restrict the Company's ability to incur indebtedness,
make certain payments and issue preferred stock among other things.

     During the years ended December 31, 1998 and 1999, the Company recorded
amortization of debt discount of approximately $7.7 million and $43.6 million
related to the 2008 Notes and 2009 Notes as additional interest expense. The
senior discount notes consist of the following:

<TABLE>
<CAPTION>
                                                     AS OF          AS OF
                                                  DECEMBER 31,   DECEMBER 31,
                                                      1998           1999
                                                  ------------   ------------
                                                        (IN THOUSANDS)
<S>                                               <C>            <C>
Senior discount notes...........................    $225,238      $ 812,038
Unamortized discount............................     (92,549)      (295,787)
                                                    --------      ---------
                                                    $132,689      $ 516,251
                                                    ========      =========
</TABLE>

  CREDIT FACILITY

     In April 1999 in connection with the acquisition of communications towers
from Nextel Communications, Inc. ("Nextel"), SpectraSite Communications, Inc.
("Communications"), a wholly-owned subsidiary of SpectraSite, entered into a
$500.0 million credit facility. The credit facility consists of a $50.0 million
revolving credit facility that subject to the satisfaction of certain financial
covenants, may be drawn at any time up to December 31, 2005, at which time all
amounts drawn under the revolving credit facility must be paid in full; a $300.0
million multiple draw term loan that may be drawn at any time through March 31,
2002, which requires that the amount drawn be repaid in quarterly installments
commencing on June 30, 2002 and ending on December 31, 2005; and a $150.0
million term loan that was drawn in full at the closing of the Nextel tower
acquisition and that amortizes at a rate of 1.0% annually, payable in quarterly
installments beginning on June 30, 2002 through December 31, 2005, $67.5 million
on March 31, 2006 and the balance due on June 30, 2006.

     The revolving credit loans and the multiple draw term loans will bear
interest, at our option, at either Canadian Imperial Bank of Commerce's base
rate, plus an applicable margin of 1.5% per annum initially, which margin after
a period of time may decrease based on a leverage ratio, or the reserve adjusted
London interbank offered rate, plus an applicable margin of 3.0% per annum
initially, which margin after a period of time may decrease based on a leverage
ratio.

     The term loan bears interest, at our option, at either Canadian Imperial
Bank of Commerce's base rate, plus 2.0% per annum, which margin after a period
of time may decrease based on a leverage ratio, or the reserve adjusted London
interbank offered rate, plus 3.5% per annum, which margin after a period of time
may decrease based on a leverage ratio.

     Communications will be required to pay a commitment fee of between 1.25%
and 0.50% per annum in respect of the undrawn portion of the multiple draw term
loan, depending on the amount undrawn. We are required to pay a commitment fee
of 0.50% per annum in respect of the undrawn portion of the revolving credit
facility.

     Communications may be required to prepay the credit facility in part upon
the occurrence of certain events, such as a sale of assets, the incurrence of
certain additional indebtedness, the issuance of equity and the generation of
excess cash flow.

     SpectraSite and each of Communications' subsidiaries has guaranteed the
obligations under the credit facility. The credit facility is further secured by
substantially all the tangible and intangible assets of

                                      F-13
<PAGE>   47
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Communications and its subsidiaries and a pledge of all of the capital stock of
Communications and its subsidiaries.

     The credit facility contains a number of covenants that, among other
things, restrict our ability to incur additional indebtedness; create liens on
assets; make investments, make acquisitions, or engage in mergers or
consolidations; dispose of assets; enter into new lines of business; engage in
certain transactions with affiliates; and pay dividends or make capital
distributions. SpectraSite, however, will be permitted to pay dividends after
July 15, 2003, for the purpose of paying interest on the 2008 Notes and the 2009
Notes so long as no default under the credit facility then exists or would exist
after giving effect to such payment.

     In addition, the credit facility requires compliance with certain financial
covenants, including requiring Communications and its subsidiaries, on a
consolidated basis, to maintain a maximum ratio of total debt to annualized
EBITDA; a minimum interest coverage ratio; a minimum fixed charge coverage
ratio; and a minimum annualized EBITDA, for the first year only.

  OTHER LONG-TERM DEBT

     Long-term debt, other than the 2008 Notes and 2009 Notes, consists of the
following:

<TABLE>
<CAPTION>
                                                                 AS OF
                                                              DECEMBER 31,
                                                            ----------------
                                                            1998      1999
                                                            ----    --------
                                                             (IN THOUSANDS)
<S>                                                         <C>     <C>
Credit facility...........................................  $ --    $200,000
Other obligations.........................................    18       3,128
Less current portion......................................   (18)       (601)
                                                            ----    --------
Long-term debt, less current portion......................  $ --    $202,527
                                                            ====    ========
</TABLE>

     In connection with the acquisition of Westower Corporation ("Westower"),
the Company assumed certain long-term obligations of the acquired entity.
Substantially all of Westower's outstanding long-term obligations were repaid
prior to the acquisition, with the remaining unpaid obligations payable in
monthly installments through 2004. Other obligations for the year ended December
31, 1998 consisted of installment notes payable to a bank, which were
subsequently paid during 1999.

  BANK CREDIT AGREEMENT

     In January 1998, the Company signed a letter of intent with a bank for a
$50.0 million revolving credit facility for the purpose of financing the
construction and/or the acquisition of telecommunication towers for personal
communications services or other wireless communication services and other
permitted acquisitions as defined by the agreement, contingent upon certain
events. In the year ended December 31, 1998 the Company incurred approximately
$0.3 million in commitment fees related to the agreement. The agreement expired
on December 31, 1998.

4.  CONVERTIBLE VOTING PREFERRED STOCK AND SHAREHOLDERS' EQUITY

  SERIES A AND B CONVERTIBLE VOTING PREFERRED STOCK

     At December 31, 1998, Spectrasite had mandatorily redeemable convertible
preferred stock consisting of Series A and Series B cumulative redeemable
preferred stock, each with a $0.001 par value, 10,462,830 shares authorized in
the aggregate and 3,462,830 and 7,000,000 shares issued and outstanding,
respectively. In connection with closing the Nextel tower acquisition,
provisions for dividends and redemption were eliminated with respect to the
Series A and Series B preferred stock. Previously accrued dividends have been
eliminated,

                                      F-14
<PAGE>   48
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

and the outstanding balances have been reclassified as convertible preferred
stock in shareholders' equity in the balance sheet as of December 31, 1999. Each
share of Series A and Series B preferred stock is convertible into one share of
common stock and entitles the holder to vote on an as-converted basis with
holders of common stock. Contemporaneously with the closing of an underwritten
public offering of common stock, the outstanding shares of Series A and Series B
preferred stock automatically converted to common stock on February 4, 2000.

  SERIES C CONVERTIBLE PREFERRED STOCK

     In connection with closing the Nextel tower acquisition, SpectraSite sold
46,286,795 shares of Series C preferred stock at a price of $5.00 per share. In
addition, Nextel received 14 million shares of Series C preferred stock. At
December 31, 1999, SpectraSite had 60,286,795 of $0.001 par value Series C
shares authorized, issued and outstanding. Each share of Series C preferred
stock is convertible into one share of common stock and entitles the holder to
vote on an as-converted basis with holders of common stock. Contemporaneously
with the closing of an underwritten public offering of common stock, the
outstanding shares of Series C preferred stock automatically converted to common
stock on February 4, 2000.

  COMMON STOCK

     In connection with the Nextel tower acquisition, SpectraSite also restated
its certificate of incorporation. The amended and restated certificate
authorized 85 million shares of common stock, $0.001 par value per share. In
addition, the Company increased the maximum number of shares for which options
may be granted under its stock option plan to 4.1 million.

     In August 1999, SpectraSite amended its restated certificate of
incorporation to increase the authorized shares of common stock to 300 million.
In addition, SpectraSite increased the maximum number of shares for which
options may be granted under its stock option plan to 10 million and authorized
one million shares to be issued under an Employee Stock Purchase Plan.

  WARRANTS

     During September and October, 1998, 150,000 shares of common stock were
issued in connection with the exercise of common stock warrants at a price of
$0.001 per share.

     On October 9, 1998, the Company paid a former employee $500,000 under an
agreement to buy 125,000 shares of SpectraSite common stock from the former
employee for an agreed upon price and to release the Company from any potential
claims. In addition, the agreement provided that shareholders of SpectraSite
would have an option to purchase the former employee's remaining 37,605 shares
of SpectraSite common stock for the same price per share, provided that the
Company advise the former employee in writing of the exercise of all or any
portion of such option by November 15, 1998. The shares were subsequently
purchased by a shareholder of the Company on February 5, 1999 for an aggregate
purchase price of $150,000.

  STOCK OPTIONS

     During 1997, the Company adopted a stock option plan which provides for the
purchase of common stock by key employees, directors, advisors and consultants
of the Company. The maximum number of shares for which options may be granted
under the plan shall not exceed 10 million shares. Stock options are granted
under various stock option agreements. Each stock option agreement contains
specific terms. During the period from inception (April 25, 1997) to December
31, 1997 and the years ended December 31, 1998 and 1999, option grants were made
solely to employees.

     The options without a performance acceleration feature, which were granted
under the terms of the incentive stock option agreement, and options granted
under the terms of the non-qualified stock option

                                      F-15
<PAGE>   49
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

agreement vest and become exercisable ratably over a four or five-year period,
commencing one year after date of grant.

     The options with a performance acceleration feature, which were granted
under the terms of the incentive stock option agreement, and the non-qualified
stock option agreement vest and become exercisable upon the seventh anniversary
of the grant date. Vesting, however, can be accelerated upon the achievement of
certain milestones defined in each agreement.

     In accordance with SFAS 123, the fair value of each option grant was
determined by using the Black-Scholes option pricing model with the following
weighted average assumptions for the period ended December 31, 1997, the years
ended December 31, 1998 and 1999: dividend yield of 0.0%; volatility of .70;
risk free interest rate of 6.0% to 5.0%; and expected option lives of 7 years.
Had compensation cost for the Company's stock options been determined based on
the fair value at the date of grant consistent with the provisions of SFAS 123,
the Company's net loss and net loss per share would have been $4.0 million and
$5.37 for the period ended December 31, 1997, $9.5 million and $12.44 for the
year ended December 31, 1998 and $100.9 million and $12.80 for the year ended
December 31, 1999.

     Option activity under the Company's plans is summarized below:

<TABLE>
<CAPTION>
                                                             WEIGHTED AVERAGE
                                                 SHARES       EXERCISE PRICE
                                                ---------    ----------------
<S>                                             <C>          <C>
Outstanding at April 25, 1997.................         --         $  --
Options granted...............................    884,700          2.89
Options exercised.............................         --            --
Options canceled..............................         --            --
                                                ---------
Outstanding at December 31, 1997..............    884,700          2.89
Options granted...............................    842,000          3.33
Options exercised.............................         --            --
Options canceled..............................   (158,800)         2.92
                                                ---------
Outstanding at December 31, 1998..............  1,567,900          3.12
Options granted...............................  2,705,810          5.32
Options exercised.............................   (200,006)         2.52
Options canceled..............................   (271,670)         3.41
Options assumed in Westower acquisition.......  1,921,757          8.62
                                                ---------
Outstanding at December 31, 1999..............  5,723,791          6.02
                                                =========
</TABLE>

     At December 31, 1997, there were no options exercisable under the stock
option plan. There were 185,475 and 1,765,666 options exercisable under the
stock option plan at December 31, 1998 and 1999, respectively.

<TABLE>
<CAPTION>
                               OPTIONS OUTSTANDING                         OPTIONS EXERCISABLE
- -------------------------------------------------------------------   ------------------------------
                    NUMBER          WEIGHTED                            NUMBER
                  OUTSTANDING       AVERAGE                           EXERCISABLE
                     AS OF         REMAINING       WEIGHTED AVERAGE      AS OF      WEIGHTED AVERAGE
EXERCISE PRICES    12/31/99     CONTRACTUAL LIFE    EXERCISE PRICE     12/31/99      EXERCISE PRICE
- ---------------   -----------   ----------------   ----------------   -----------   ----------------
<S>               <C>           <C>                <C>                <C>           <C>
 $0.01-$ 4.56      2,061,273          7.92              $ 3.75         1,113,320         $ 3.97
 $5.00-$ 5.00      2,382,810          9.41                5.00                --             --
 $6.35-$17.06      1,279,708          9.14               11.55           652,346          12.16
                   ---------                                           ---------
 $0.01-$17.06      5,723,791          8.81                6.02         1,765,666           7.00
                   =========                                           =========
</TABLE>

                                      F-16
<PAGE>   50
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The weighted average remaining contractual life of the stock options
outstanding was 8.76 years, 9.98 years and 8.81 years at December 31, 1997, 1998
and 1999, respectively.

  EMPLOYEE STOCK PURCHASE PLAN

     In August 1999, SpectraSite adopted the SpectraSite Holdings, Inc. Employee
Stock Purchase Plan. The board of directors has reserved and authorized one
million shares of common stock for issuance under the plan. Eligible employees
may purchase a number of shares of common stock equal to the total dollar amount
contributed by the employee to a payroll deduction account during each six-month
offering period divided by the purchase price per share. The price of the shares
offered to employees under the plan will be 85% of the lesser of the fair market
value at the beginning or end of each six-month offering period. As of December
31, 1999, SpectraSite had not initiated an offering period.

  COMMON STOCK RESERVED FOR FUTURE ISSUANCE

     The Company has reserved shares of its authorized shares of common stock
for future issuance as follows:

<TABLE>
<CAPTION>
                                                         AS OF
                                                   DECEMBER 31, 1999
                                                   -----------------
<S>                                                <C>
Convertible preferred stock......................     70,749,625
Outstanding stock options........................      5,723,791
Possible future issuance under stock option
  plans..........................................      4,076,203
Employee stock purchase plan.....................      1,000,000
                                                      ----------
Total............................................     81,549,619
                                                      ==========
</TABLE>

5.  LEASES

  OPERATING LEASES FROM OTHERS

     The Company leases land ("ground leases"), office space and certain office
equipment under noncancelable operating leases. Ground leases are generally for
terms of five years and are renewable at the option of the Company. Rent expense
was approximately $0.2 million, $0.6 million and $17.9 million for the period
from April 25, 1997 (inception) to December 31, 1997 and the years ended
December 31, 1998 and 1999, respectively. The future minimum lease payments for
these leases are as follows:

<TABLE>
<CAPTION>
                                                         AS OF
                                                   DECEMBER 31, 1999
                                                   -----------------
                                                    (IN THOUSANDS)
<S>                                                <C>
2000.............................................      $ 24,686
2001.............................................        22,618
2002.............................................        19,055
2003.............................................        13,121
2004.............................................         8,139
Thereafter.......................................        22,725
                                                       --------
Total............................................      $110,344
                                                       ========
</TABLE>

  ANTENNA SPACE LEASED TO OTHERS

     The Company currently leases antenna space on multi-tenant towers to a
variety of wireless service providers under non-cancelable operating leases. The
tenant leases are generally for terms of five years and

                                      F-17
<PAGE>   51
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

include options for renewal. The approximate future minimum rental income under
operating leases that have initial or remaining non-cancelable terms in excess
of one year are as follows:

<TABLE>
<CAPTION>
                                                         AS OF
                                                   DECEMBER 31, 1999
                                                   -----------------
                                                    (IN THOUSANDS)
<S>                                                <C>
2000.............................................      $ 63,494
2001.............................................        63,872
2002.............................................        61,548
2003.............................................        58,403
2004.............................................        43,861
Thereafter.......................................        10,684
                                                       --------
Total............................................      $301,862
                                                       ========
</TABLE>

6.  INCOME TAXES

     The provision for income taxes is comprised of the following:

<TABLE>
<CAPTION>
                                 PERIOD FROM
                                  INCEPTION
                             (APRIL 25, 1997) TO     YEAR ENDED      YEAR ENDED
                                DECEMBER 31,        DECEMBER 31,    DECEMBER 31,
                                    1997                1998            1999
                             -------------------    ------------    ------------
                                               (IN THOUSANDS)
<S>                          <C>                    <C>             <C>
Current:
State......................      $       --          $       --      $       40
Foreign....................              --                  --             528
                                 ----------          ----------      ----------
Total provision for income
  taxes....................      $       --          $       --      $      568
                                 ==========          ==========      ==========
</TABLE>

     The reconciliation of income taxes computed at the U.S. federal statutory
rate to income tax provision (benefit) is as follows:

<TABLE>
<CAPTION>
                                                 PERIOD FROM
                                                  INCEPTION
                                             (APRIL 25, 1997) TO     YEAR ENDED      YEAR ENDED
                                                DECEMBER 31,        DECEMBER 31,    DECEMBER 31,
                                                    1997                1998            1999
                                             -------------------    ------------    ------------
<S>                                          <C>                    <C>             <C>
Federal income tax benefit at statutory
  rate.....................................           (35.0)%             (35.0)%         (35.0)%
Foreign tax rate differential..............              --                  --             0.6%
Non-deductible goodwill amortization.......              --                  --             2.0%
Non-deductible interest expense............              --                 5.8%            0.5%
Change in valuation allowance..............            35.0%               29.2%           32.5%
                                                 ----------          ----------      ----------
Effective income tax rate..................              --%                 --%            0.6%
                                                 ==========          ==========      ==========
</TABLE>

                                      F-18
<PAGE>   52
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The components of net deferred taxes are as follows:

<TABLE>
<CAPTION>
                                                                  AS OF DECEMBER 31,
                                                              ---------------------------
                                                              1997      1998       1999
                                                              -----    ------    --------
                                                                    (IN THOUSANDS)
<S>                                                           <C>      <C>       <C>
Deferred tax assets:
  Tax loss carry forwards...................................  $ 183    $1,038    $ 15,600
  Accreted interest on senior discount notes................     --     2,978      19,730
  Accrued liabilities.......................................     --        --       1,920
  Depreciation..............................................     --        41       1,760
                                                              -----    ------    --------
     Total gross deferred tax assets........................    183     4,057      39,010
  Valuation allowance.......................................   (183)   (4,057)    (39,010)
                                                              -----    ------    --------
     Total net deferred tax assets..........................  $  --    $   --    $     --
                                                              =====    ======    ========
</TABLE>

     The Company has a federal net operating loss carry forward of approximately
$40 million that begins to expire in 2012. Also, the Company has state tax
losses of $40 million that expire beginning in 2002. Based on the Company's
history of losses to date, management has provided a valuation allowance to
fully offset the deferred assets related to federal and state net operating loss
carry forwards.

7.  RELATED PARTY TRANSACTIONS

     In conjunction with the acquisition of TeleSite, the Company issued a $2.3
million note payable to a shareholder. In the period from April 25, 1997
(inception) to December 31, 1997 and during the year ended December 31, 1998,
the Company incurred approximately $100,000 and $81,000 of interest expense
related to the note payable to shareholder, respectively. In June 1998, the note
was repaid in full.

     On April 20, 1999, in connection with the Nextel tower acquisition, four
directors purchased 50,000, 25,000, 262,973 and 100,000 shares of SpectraSite's
Series C preferred stock for $5.00 per share, respectively. In addition, one
director purchased 100,000 shares of common stock and executed promissory notes
as payment for the common stock. The promissory notes mature on April 20, 2009
and bear interest at 5.67% per year. Under the purchase agreement, 25% of the
shares of common stock vest each year, with the first installment vesting on
April 20, 2000. In addition, SpectraSite has the right to repurchase half of the
shares at their original cost to the director at any time prior to April 20,
2000 and upon the date the director ceases to perform services for SpectraSite.

     Affiliates of three significant stockholders received an aggregate of two
million shares of SpectraSite's common stock valued at $9.0 million as
consideration for financing commitments made in connection with the Nextel tower
acquisition. Affiliates of each entity are members of the Company's board
directors.

     To finance a portion of the cash consideration paid to Nextel, SpectraSite
issued and sold the 2009 Notes in a private offering and borrowed $150.0 million
under its credit facility. CIBC World Markets Corp. was an initial purchaser in
the 2009 notes offering, and an affiliate of CIBC World Markets is an agent and
a lender under the credit facility. CIBC World Markets was also an initial
purchaser of SpectraSite's 2008 Notes. CIBC World Markets and its affiliates
received customary fees for such services. One director of SpectraSite is a
Managing Director of CIBC World Markets.

     In May 1997, an officer agreed to invest additional personal funds in
SpectraSite at the average per share price of Series A and Series B preferred
stock. In satisfaction of this commitment, the officer purchased 210,000 shares
of common stock for an aggregate purchase price of $0.8 million on April 20,
1999.

     In August 1999, SpectraSite loaned an officer $325,000 in connection with
the exercise of certain stock options. The 112,500 shares the officer acquired
through the exercise of these options are pledged to

                                      F-19
<PAGE>   53
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

SpectraSite as security for this loan. The loan bears interest at the applicable
federal rate under the Internal Revenue Code, 5.36% per annum, and matures in
August 2002.

     In September 1999, SpectraSite loaned an officer $500,000 to purchase a
home as a relocation incentive. This loan will be secured by any shares of
SpectraSite's common stock issued to the officer upon exercise of options, bears
interest at 5.82% per annum and matures in September 2004.

     The Company has a revolving loan arrangement with an affiliate under which
the affiliate may borrow up to $14.4 million. The loan accrues interest at 12%
and is collateralized by property, equipment, investments, contracts and other
assets of the affiliate. At December 31, 1999, the affiliate owed $2.9 million
to the Company under the loan. In 1999, the Company had interest income of $0.1
million from amounts outstanding under the loan.

8.  EMPLOYEE BENEFIT PLAN

     The Company provides a 401(k) plan for the benefit of all its employees
meeting specified eligibility requirements. The Company's expenses related to
the plan are discretionary and totaled approximately $11,000, $31,000 and
$121,000 for the period from April 25, 1997 (inception) to December 31, 1997 and
for the years ended December 31, 1998 and 1999, respectively.

9.  SALE OF AFFILIATES

     In February 1998, the Company entered into an agreement under which it sold
a wholly-owned subsidiary, MetroSite, for $299,000. The Company recognized a
gain on the sale of $257,000.

     In May 1998, the Company sold its ownership interest in Communication
Management Specialists, LLC ("CMS") for $375,000, in exchange for a note
receivable bearing interest at 8.5% per annum, payable to the Company over 60
months. The total amount due to the Company at December 31, 1999 is $261,000 of
which the current portion, $73,000, is included in prepaid expenses and other
current assets in the accompanying balance sheet. The Company recognized a gain
on the sale of approximately $189,000. Prior to the sale, the Company's
ownership interest in CMS was accounted for using the equity method.

10.  ACQUISITION ACTIVITY

     In June 1998, the Company entered into an agreement under which it acquired
all of the membership interests of H&K Investments, LLC for $1.4 million in a
transaction accounted for as a purchase. The results of operations of H&K are
included in the Company's operations from the date of acquisition. The Company
paid $1.3 million in cash and recorded notes payable for $0.1 million in
conjunction with the acquisition. The outstanding note payable was subsequently
paid in December 1998.

     In August 1998, the Company entered into an asset purchase agreement with
Airadigm Communications, Inc. ("Airadigm") for the purchase of 47 towers for
approximately $11.8 million. As of December 31, 1998, 40 towers had been placed
in service. During 1999, five additional towers were placed in service and
Airadigm refunded the Company's deposit for the remaining two towers. Under the
terms of the agreement, the Company will lease antenna space on the towers to
Airadigm.

     In August 1998, the Company entered into an asset purchase agreement with
Amica Wireless Phone Service, Inc. for the purchase of the construction in
progress related to 14 towers for approximately $474,000.

     In September 1998, the Company acquired all of the outstanding common stock
of GlobalComm, Inc. for $2.0 million in cash in a transaction accounted for as a
purchase. The results of operations of GlobalComm are included in the Company's
operations from the date of acquisition. The Company recorded approximately $1.7
million of goodwill related to the transaction.

     In April 1999, the Company purchased 2,000 communications towers from
Nextel for $560.0 million in cash and 14 million shares of Series C preferred
stock valued at $70.0 million, which represented approximately 18% of all the
Company's outstanding capital stock. As part of the transaction, Nextel agreed
to lease 1,700 additional sites on the Company's towers as part of Nextel's
national deployment. SpectraSite and certain of Nextel's subsidiaries entered
into a master site commitment agreement under which Nextel and its

                                      F-20
<PAGE>   54
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

controlled affiliates will offer SpectraSite exclusive opportunities, under
specific terms and conditions, relating to the construction or purchase of, or
co-location on, additional communications sites. These sites will then be leased
by subsidiaries of Nextel under the terms of the master site lease agreement. If
the number of new sites leased is less than the agreed upon number as of
particular dates, Nextel has agreed to make payments to SpectraSite. The master
site commitment agreement also gives SpectraSite a right of first refusal to
acquire any towers that Nextel or certain affiliates desire to sell. Of the
total consideration paid to Nextel, $45.0 million has been allocated as a
deposit relating to this commitment. The Company used $150.0 million of
borrowings under a $500.0 million committed credit facility, $340.0 million from
the proceeds of the 2009 Notes and $231.4 million from the sale of new Series C
preferred stock to fund the cash purchase price and to pay related fees and
expenses.

     In connection with the purchase, Nextel entered into a master site lease
agreement to become the anchor tenant on each of the acquired towers and also
conveyed to the Company certain third-party co-location site leases associated
with the acquired assets. Nextel also transferred to the Company certain
non-cancelable ground leases, and the Company assumed all operating and other
costs associated with the acquired assets.

     In September 1999, the Company consummated the Agreement and Plan of
Merger, dated as of May 15, 1999 with Westower. Under the terms of the
agreement, Westower shareholders received 1.81 shares of SpectraSite common
stock for each share of Westower common stock. In the aggregate, SpectraSite
exchanged 15.5 million shares of its common stock valued at $205.6 million for
8.6 million shares of Westower common stock and assumed $81.5 million of debt.
The Company repaid $72.2 million of such assumed debt at closing. In addition,
the Company assumed the outstanding Westower employee stock options, which were
converted into options to purchase 1.7 million shares of SpectraSite's common
stock.

     On December 30, 1999, SpectraSite acquired Stainless, Inc., formerly a
wholly-owned subsidiary of Northwest Broadcasting, L.P., for $40.0 million in
cash. Stainless provides engineering, fabrication and other services in
connection with the erection of towers used for television broadcast companies.

     Also on December 30, 1999, SpectraSite acquired Doty-Moore Tower Services,
Inc., Doty-Moore Equipment Company, Inc. and Doty Moore RF Services, Inc. for
$2.5 million in cash and 500,000 shares of SpectraSite's common stock valued at
$5.4 million. Doty-Moore is a leading source for broadcast tower construction
and technical services.

     The acquisitions of Westower, Stainless and Doty-Moore were accounted for
as purchases, and the excess of cost over fair value of the net assets acquired
is being amortized on a straight-line basis over fifteen years. The operations
of each are included in the consolidated statement of operations from the date
of acquisition.

     The following unaudited pro forma summary presents consolidated results of
operations for the Company as if the acquisitions of Westower, Doty-Moore and
Stainless had been consummated as of January 1, 1999. The pro forma information
does not necessarily reflect the actual results that would have been achieved,
nor is it necessarily indicative of future consolidated results for the Company.

<TABLE>
<CAPTION>
                                                             YEAR ENDED
                                                         DECEMBER 31, 1999
                                                      ------------------------
                                                      (IN THOUSANDS OF DOLLARS
                                                       EXCEPT PER SHARE DATA)
<S>                                                   <C>
Net revenues........................................         $ 187,082
Net loss............................................          (112,515)
Basic and diluted net loss per common share.........             (5.11)
</TABLE>

11.  BUSINESS SEGMENTS

     The Company previously operated in one business segment. As a result of the
Nextel tower and Westower acquisitions, the Company now operates in two business
segments, site leasing and network services. Prior period information has been
restated to reflect the current business segments. The site leasing segment
provides for leasing and subleasing of antennae sites on multi-tenant towers for
a diverse range of

                                      F-21
<PAGE>   55
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

wireless communication services, including personal communication services,
paging, cellular and microwave. The network services segment offers a broad
range of network development services, including network design, tower
construction and antenna installation.

     In evaluating financial performance, management focuses on operating profit
(loss), excluding depreciation and amortization and restructuring charges. This
measure of operating profit (loss) is also before interest income, interest
expense, other income (expense) and income taxes. All reported segment revenues
are generated from external customers as intersegment revenues are not
significant.

     Summarized financial information concerning each reportable segment is
shown in the following table. The "Other" column represents amounts excluded
from specific segments, such as income taxes, corporate general and
administrative expenses, depreciation and amortization, restructuring and other
non-recurring charges and interest. In addition, "Other" also includes corporate
assets such as cash and cash equivalents, tangible and intangible assets and
income tax accounts which have not been allocated to a specific segment.

<TABLE>
<CAPTION>
                                                      SITE     NETWORK
                                                    LEASING    SERVICES     OTHER       TOTAL
                                                    --------   --------   ---------   ----------
                                                                   (IN THOUSANDS)
<S>                                                 <C>        <C>        <C>         <C>
YEAR ENDED DECEMBER 31, 1999
Revenues..........................................  $ 46,515   $53,570    $      --   $  100,085
Income (loss) before income taxes.................    28,661     7,915     (133,676)     (97,100)
Assets............................................   756,442    60,149      403,362    1,219,953
YEAR ENDED DECEMBER 31, 1998
Revenues..........................................  $    656   $ 8,142    $      --   $    8,798
Income (loss) before income taxes.................       357     5,650      (15,086)      (9,079)
Assets............................................    25,865        --      136,081      161,946
PERIOD FROM INCEPTION (APRIL 25, 1997) TO DECEMBER
  31, 1997
Revenues..........................................  $     --   $ 5,002    $      --   $    5,002
Income (loss) before income taxes.................        --    (3,997)         107       (3,890)
Assets............................................        --        --       13,642       13,642
</TABLE>

     From inception (April 25, 1997) until the acquisition of Westower on
September 2, 1999, all of the Company's operations were located in the United
States.

     Net revenues for the year ended December 31, 1999 were located in
geographic areas as follows:

<TABLE>
<CAPTION>
                                                       (IN THOUSANDS)
<S>                                                    <C>
United States........................................     $ 90,984
Canada...............................................       13,794
Eliminations.........................................       (4,693)
                                                          --------
Consolidated net revenues............................     $100,085
                                                          ========
</TABLE>

     At December 31, 1999, assets were located in geographic areas as follows:

<TABLE>
<CAPTION>
                                                       (IN THOUSANDS)
<S>                                                    <C>
United States........................................    $1,065,256
Canada...............................................        65,153
                                                         ----------
Consolidated long-lived assets.......................    $1,130,409
                                                         ==========
</TABLE>

                                      F-22
<PAGE>   56
                  SPECTRASITE HOLDINGS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

12.  YEAR 2000 ISSUE (UNAUDITED)

     The Company has not experienced any immediate adverse impact from the
transition to the Year 2000; however, management cannot provide assurance that
the company, it's suppliers or it's customers have not been affected in a manner
that is not yet apparent. In addition, certain computer programs which were date
sensitive to the Year 2000 may not process the Year 2000 as a leap year, and any
negative consequential effects remain unknown. As a result, the Company
continues to monitor Year 2000 compliance and the Year 2000 compliance of its
suppliers and customers.

13.  SUBSEQUENT EVENTS (UNAUDITED)

     On January 5, 2000, SpectraSite acquired Vertical Properties, Inc. in a
merger transaction under which SpectraSite issued 225,000 unregistered shares of
its common stock and repaid outstanding indebtedness of approximately $2.0
million. Vertical Properties is a broadcast tower development company formed to
meet the needs of broadcasters in secondary broadcast markets faced with the
complexities of converting to digital technology through site acquisition, tower
placement and leasing of antenna space.

     On January 5, 2000, SpectraSite acquired Apex Site Management Holdings,
Inc. ("Apex") in a merger transaction. Apex provides rooftop and in-building
access to wireless carriers. SpectraSite issued approximately 4.5 million
unregistered shares of its common stock and approximately 194,000 options to
purchase common stock at an exercise price of $3.58 per share to the
shareholders of Apex at the closing of the merger. In addition, SpectraSite
issued approximately 1.5 million additional shares of common stock into escrow.
These shares may be released to Apex's shareholders six months after
SpectraSite's currently pending public offering is consummated based on the
average trading price for SpectraSite's common stock for the 30-day period
immediately preceding the six-month anniversary of the public offering.
SpectraSite also used approximately $6.2 million in cash to repay outstanding
indebtedness and other obligations of Apex in connection with the merger.

     On January 28, 2000, SpectraSite acquired substantially all of the assets
of International Towers Inc. and its subsidiaries, including S&W Communications
Inc. International Towers owns a broadcast tower manufacturing facility and,
through S&W Communications, provides integrated services for the erection of
broadcast towers, foundations and multi-tenant transmitter buildings.
SpectraSite paid $5.5 million and issued an aggregate of 350,000 unregistered
shares of its common stock in connection with this acquisition.

     On February 4, 2000, SpectraSite completed an underwritten public offering
of 25.6 million shares of common stock for net proceeds of approximately $411.3
million. As a result of the offering, all Series A, B, C preferred stock
automatically converted to common stock on a share-for-share basis.

     On February 17, 2000, the company signed a definitive agreement with
AirTouch Communications, Inc. to obtain the rights to approximately 430 towers
through a master sublease for approximately $155 million. The transaction is
expected to close in stages with the initial closing to occur no later than
November 15, 2000, if certain conditions are met.

                                      F-23
<PAGE>   57

                         REPORT OF INDEPENDENT AUDITORS

The Members
TeleSite Services, LLC

     We have audited the accompanying consolidated balance sheet of TeleSite
Services, LLC as of December 31, 1996 and the related consolidated statements of
operations and members' equity and cash flows for the year ended December 31,
1996 and for the period from January 1, 1997 through May 12, 1997. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

     We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall consolidated
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of TeleSite
Services, LLC at December 31, 1996 and the consolidated results of its
operations and its cash flows for the year ended December 31, 1996 and for the
period from January 1, 1997 through May 12, 1997, in conformity with accounting
principles generally accepted in the United States.

                                          ERNST & YOUNG LLP

Raleigh, North Carolina
March 27, 1998

                                      F-24
<PAGE>   58

                             TELESITE SERVICES, LLC

                           CONSOLIDATED BALANCE SHEET
                            AS OF DECEMBER 31, 1996

<TABLE>
<S>                                                           <C>
ASSETS
Current assets:
  Cash......................................................  $    4,854
  Accounts receivable:
     Trade..................................................   1,777,611
     Other..................................................      37,107
  Prepaid expenses and other................................      39,964
                                                              ----------
Total current assets........................................   1,859,536
Property and equipment, net.................................     931,291
Investment in affiliate.....................................     131,459
                                                              ----------
Total assets................................................  $2,922,286
                                                              ==========
LIABILITIES AND MEMBERS' EQUITY
Current liabilities:
  Line of credit............................................  $  946,724
  Accounts payable..........................................     688,180
  Accrued expenses..........................................      33,092
  Current portion of long-term debt.........................     295,711
                                                              ----------
Total current liabilities...................................   1,963,707
Long-term debt, less current portion........................      81,106
                                                              ----------
Total liabilities...........................................   2,044,813
Members' equity.............................................     877,473
                                                              ----------
Total liabilities and members' equity.......................  $2,922,286
                                                              ==========
</TABLE>

See accompanying notes.

                                      F-25
<PAGE>   59

                             TELESITE SERVICES, LLC

                     CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                                   FOR THE
                                                                                 PERIOD FROM
                                                               FOR THE         JANUARY 1, 1997
                                                             YEAR ENDED              TO
                                                          DECEMBER 31, 1996     MAY 12, 1997
                                                          -----------------    ---------------
<S>                                                       <C>                  <C>
Revenues................................................     $8,840,869          $1,925,985
Costs of operations.....................................      2,254,777             594,683
Selling, general and administrative expenses............      4,255,840           1,741,856
Depreciation expense....................................         91,133              55,870
                                                             ----------          ----------
Operating income (loss).................................      2,239,119            (466,424)
Interest expense........................................        (66,505)            (35,695)
Equity in earnings (loss) of affiliate..................        116,459              (1,087)
                                                             ----------          ----------
Net income (loss).......................................     $2,289,073          $ (503,206)
                                                             ==========          ==========
Pro forma income data (unaudited):
  Net income (loss) as reported.........................     $2,289,073          $ (503,206)
  Pro forma provision for income taxes..................        892,783                  --
                                                             ----------          ----------
  Pro forma net income (loss)...........................     $1,396,290          $ (503,206)
                                                             ==========          ==========
</TABLE>

See accompanying notes.

                                      F-26
<PAGE>   60

                             TELESITE SERVICES, LLC

                   CONSOLIDATED STATEMENTS OF MEMBERS' EQUITY

<TABLE>
<S>                                                           <C>
Members' deficiency at January 1, 1996......................  $ (445,584)
  Distributions to members..................................    (966,016)
  Net income................................................   2,289,073
                                                              ----------
Members' equity at December 31, 1996........................  $  877,473
  Contribution to capital...................................         100
  Distributions to members..................................    (211,256)
  Net loss..................................................    (503,206)
                                                              ----------
Members' equity at May 12, 1997.............................  $  163,111
                                                              ==========
</TABLE>

See accompanying notes.

                                      F-27
<PAGE>   61

                             TELESITE SERVICES, LLC

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                   FOR THE
                                                                                 PERIOD FROM
                                                               FOR THE         JANUARY 1, 1997
                                                             YEAR ENDED              TO
                                                          DECEMBER 31, 1996     MAY 12, 1997
                                                          -----------------    ---------------
<S>                                                       <C>                  <C>
OPERATING ACTIVITIES
Net income (loss).......................................     $ 2,289,073          $(503,206)
Adjustments to reconcile net income (loss) to net cash
  provided by (used in) operating activities:
  Depreciation..........................................          91,133             55,870
  Equity in (earnings) loss of affiliate................        (116,459)             1,087
  Changes in operating assets and liabilities:
     Trade accounts receivable..........................      (1,314,087)           456,345
     Other accounts receivable..........................         (34,072)           (76,610)
     Prepaid expenses and other.........................         (35,827)           (17,487)
     Accounts payable...................................         197,702            (42,534)
     Accrued expenses...................................          31,568             55,593
                                                             -----------          ---------
       Net cash provided by (used in) operating
          activities....................................       1,109,031            (70,942)
INVESTING ACTIVITIES
Purchases of property and equipment.....................        (837,808)          (321,788)
Investment in affiliate.................................         (15,000)                --
                                                             -----------          ---------
       Net cash used in investing activities............        (852,808)          (321,788)
FINANCING ACTIVITIES
Net proceeds from line of credit........................         368,724            249,338
Net proceeds from long-term debt........................         556,391            293,785
Repayment of long-term debt.............................        (224,923)                --
Proceeds from capital contribution......................              --                100
Distribution to members.................................        (966,016)          (153,499)
                                                             -----------          ---------
       Net cash (used in) provided by financing
          activities....................................        (265,824)           389,724
                                                             -----------          ---------
Net decrease in cash....................................          (9,601)            (3,006)
Cash at beginning of period.............................          14,455              4,854
                                                             -----------          ---------
Cash at end of period...................................     $     4,854          $   1,848
                                                             ===========          =========
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest................     $    64,000          $  30,695
                                                             ===========          =========
</TABLE>

See accompanying notes.

                                      F-28

<PAGE>   1
                                                                   Exhibit 2.9





                              AGREEMENT TO SUBLEASE


                          Dated as of February 16, 2000


                                 by and between


                          AIRTOUCH COMMUNICATIONS, INC.


                                       and


                  THE OTHER PARTIES NAMED HEREIN AS SUBLESSORS,


                                  as Sublessors


                                       and


                             CALIFORNIA TOWER, INC.


                                       and


                           SPECTRASITE HOLDINGS, INC.




<PAGE>   2





                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----

ARTICLE 1 Definitions..........................................................1
         1.1      Additional Tower.............................................1
         1.2      Affiliate....................................................2
         1.3      Agreement....................................................2
         1.4      AirTouch Material Adverse Effect.............................2
         1.5      Assets 2
         1.6      Business Day.................................................3
         1.7      Charter Documents............................................3
         1.8      Code   ......................................................3
         1.9      Contracts....................................................3
         1.10     Default......................................................3
         1.11     Encumbrance..................................................3
         1.12     Environmental Condition......................................3
         1.13     Event  3
         1.14     Excluded Assets..............................................3
         1.15     FCC    ......................................................4
         1.16     GAAP   4
         1.17     Governmental Authority.......................................4
         1.18     Governmental Permits.........................................4
         1.19     Included Towers..............................................5
         1.20     Intellectual Property........................................5
         1.21     Knowledge....................................................5
         1.22     Laws   ......................................................5
         1.23     Liability....................................................5
         1.24     Maximum Amount...............................................5
         1.25     Other Entities...............................................5
         1.26     Permitted Encumbrances.......................................6
         1.27     Person 6
         1.28     Prime Rate...................................................6
         1.29     Real Property................................................6
         1.30     Required Consents............................................6
         1.31     Significant Transaction......................................6
         1.32     Tax and Taxes................................................6
         1.33     Threshold Amount.............................................7
         1.34     Tower Related Assets.........................................7
         1.35     Tower Sites..................................................7
         1.36     Towers 7
         1.37     TowerCo Material Adverse Effect..............................7
         1.38     Transaction Documents........................................8
         1.39     Other Definitions............................................8

                                      -i-
<PAGE>   3



ARTICLE 2 Leasing of Assets....................................................9
         2.1      Leasing or Subleasing of Assets..............................9
         2.2      Restricted Items.............................................9
         2.3      Exclusive Commitment Fee and Payment........................10
         2.4      Completion of Transaction...................................11
         2.5      References Applicable to Individual Closings................12

ARTICLE 3 Representations and Warranties of AirTouch..........................12
         3.1      Organization and Qualification..............................12
         3.2      Authority...................................................13
         3.3      Enforceability..............................................13
         3.4      Consents and Approvals......................................13
         3.5      Title and Encumbrances......................................13
         3.6      Governmental Permits........................................14
         3.7      Contracts...................................................14
         3.8      Environmental Laws..........................................15
         3.9      Litigation..................................................16
         3.10     Commissions.................................................16
         3.11     Real Property...............................................17
         3.12     Absence of Certain Changes or Events........................17
         3.13     Availability of Documents...................................18
         3.14     Compliance with Applicable Law..............................18
         3.15     No Other Warranties.........................................18

ARTICLE 4 Representations and Warranties of Other Entities....................18

ARTICLE 5 Representations and Warranties of TowerCo and Parent................19
         5.1      Organization and Qualification..............................19
         5.2      Authority...................................................19
         5.3      Enforceability..............................................19
         5.4      Approvals...................................................19
         5.5      Commissions.................................................19
         5.6      SEC Reports.................................................20
         5.7      Absence of Certain Changes..................................20
         5.8      Threatened or Pending Litigation............................20
         5.9      Funds Available for Exclusive Commitment Fee................20
         5.10     Capitalization..............................................20
         5.11     Interim Operations of TowerCo...............................21
         5.12     No Undisclosed Liabilities..................................21
         5.13     Pending Transactions........................................21

ARTICLE 6 Certain Covenants...................................................21
         6.1      Agreements of Sublessors Pending the Closing................21
         6.2      Agreements of TowerCo.......................................24
         6.3      Additional Agreements of Sublessors and TowerCo Parties.....25
         6.4      Confidentiality.............................................26

                                      -ii-
<PAGE>   4


ARTICLE 7 Optional TowerCo Activities.........................................26
         7.1      Preliminary Title Reports...................................26
         7.2      Environmental Site Assessments..............................26
         7.3      Structural Reports..........................................27

ARTICLE 8 Conditions Precedent to Obligations of TowerCo......................27
         8.1      Conditions Precedent........................................27
         8.2      Waiver 28

ARTICLE 9 Conditions Precedent to Obligations of Sublessors...................28
         9.1      Conditions Precedent........................................28
         9.2      Waiver 30

ARTICLE 10 Closing............................................................30
         10.1     Closing.....................................................30
         10.2     Closing Deliveries..........................................30

ARTICLE 11 Indemnification....................................................31
         11.1     Indemnification by Sublessors...............................31
         11.2     Indemnification by TowerCo..................................32
         11.3     Notice and Right To Defend Third-Party Claims...............33
         11.4     Notice and Right to Remediate...............................34
         11.5     Mitigation..................................................34
         11.6     Exclusive Remedy............................................34
         11.7     Effect of Investigation or Knowledge........................35
         11.8     Limitation of Liability.....................................35

ARTICLE 12 Termination........................................................35
         12.1     Termination Events..........................................35
         12.2     Manner of Exercise..........................................36
         12.3     Effect of Termination.......................................36

ARTICLE 13 General............................................................37
         13.1     Covenant Not To Sue and Nonrecourse to Partners.............37
         13.2     Assignment..................................................37
         13.3     Parties in Interest.........................................38
         13.4     Time of Essence.............................................38
         13.5     Severability................................................38
         13.6     Amendment...................................................38
         13.7     Force Majeure...............................................38
         13.8     Terms  39
         13.9     Headings....................................................39
         13.10    Entire Understanding; Schedules.............................39
         13.11    Counterparts................................................39
         13.12    Governing Law...............................................39
         13.13    Notices.....................................................39

                                     -iii-
<PAGE>   5


         13.14    Expenses....................................................40
         13.15    Attorneys'Fees..............................................40
         13.16    Dispute Resolution..........................................41
         13.17    Power of Attorney...........................................42
         13.18    Specific Performance; Other Rights and Remedies.............43
         13.19    TowerCo Guaranty............................................43


EXHIBITS

Exhibit A                       Sublease
Exhibit B                       Escrow Agreement
Exhibit C                       Master Lease
Exhibit D                       Build-to-Suit Agreement
Exhibit E                       Form of Certificate of Sublessors
Exhibit F                       Form of Certificate of TowerCo and Parent


                        THE FOLLOWING EXHIBITS HAVE BEEN
                         OMITTED AND WILL BE FILED WITH
                          THE COMMISSION UPON REQUEST.

                                      -iv-

<PAGE>   6



                              AGREEMENT TO SUBLEASE


         THIS  AGREEMENT  TO SUBLEASE is made as of February  16,  2000,  by and
between AIRTOUCH COMMUNICATIONS,  INC., a Delaware corporation ("AirTouch"), LOS
ANGELES   SMSA  LIMITED   PARTNERSHIP,   a   California   limited   partnership,
OXNARD-VENTURA-SIMI  LIMITED PARTNERSHIP, a California limited partnership (each
of the  foregoing  entities  being each  referred  to herein  individually  as a
"Sublessor," and collectively as "Sublessors"),  SPECTRASITE  HOLDINGS,  INC., a
Delaware  corporation  ("Parent"),   and  CALIFORNIA  TOWER,  INC.,  a  Delaware
corporation ("TowerCo" and, collectively with Parent, the "TowerCo Parties").

                                    RECITALS

         A.   Sublessors  are  the  owners  of  certain   communications   tower
structures,  interests in real property  related  thereto,  and related  assets,
property rights, liabilities and obligations.  Parent is engaged in the business
of owning, managing and operating assets similar to the foregoing assets; and

         B.  Sublessors  desire,  pursuant  to a Sublease  in the form  attached
hereto as Exhibit A (the "Sublease"),  to lease or sublease to TowerCo or confer
upon  TowerCo the right to manage and operate,  and TowerCo  desires to lease or
sublease from  Sublessors or obtain the right to manage and operate,  subject to
the terms and conditions  contained in this Agreement and the Sublease,  certain
of  Sublessors'  communications  tower  structures,  interests in real  property
related  thereto  and  related  property  rights  (such  assets and rights to be
leased,  subleased or otherwise  subjected to the  Sublease,  together  with the
liabilities  and  obligations  relating  thereto,   being  referred  to  as  the
"Business"); and

         C.  Contemporaneously  with  the  execution  of  this  Agreement,   the
Sublessors  and TowerCo are  executing a Site  Marketing  Agreement  pursuant to
which  TowerCo  will  provide the  Sublessors  with  certain  tower  leasing and
marketing services pending the closing of the transactions  contemplated  hereby
(the "Site Marketing Agreement"); and

         NOW, THEREFORE,  in consideration of the mutual covenants,  agreements,
representations and warranties  contained in this Agreement,  Sublessors and the
TowerCo Parties agree as follows:

ARTICLE 1
                                   Definitions
         Capitalized  terms  used  but not  defined  herein  have  the  meanings
ascribed to them in the Sublease. As used in this Agreement, the following terms
shall have the following meanings:

1.1 Additional  Tower.  Means any  communications  equipment and antenna support
tower structure owned or leased by any Sublessor as to which the construction is
completed  after the date of this  Agreement  and which is  included  in Annex I
hereto as a Permitted  Schedule

                                      -1-

<PAGE>   7

Update (as defined herein);  provided,  however, that such term does not include
(i) any  equipment,  property  or other  assets placed upon such towers or the
related tower sites by third parties  pursuant to Tower  Collocation  Leases or
other  Contracts or (ii) any  Excluded  Assets (as defined herein).

1.2 Affiliate.  With respect to any Person,  any other Person  controlling  such
Person,  or  controlled  by or under  common  control  with such  Person,  where
"control" (and its corollaries) means the possession, directly or indirectly, of
the power to direct or cause the direction of the management or policies of such
Person,  whether  through the  ownership  of voting  securities,  by contract or
otherwise;  and the term  "voting  securities"  means  securities  or  interests
entitling  the holder  thereof to vote for or designate  members of the Board of
Directors or individuals  performing a similar  function.  Without  limiting the
generality  of the  foregoing,  the  partnership  contemplated  by that  certain
Alliance  Agreement dated September 21, 1999 between  AirTouch and Bell Atlantic
Corporation  (including  any  subsidiaries  or  controlled  Affiliates  of  such
partnership)  shall be deemed an  "Affiliate"  of each Sublessor for purposes of
this Agreement.

1.3  Agreement.  This  Agreement to Sublease dated as of February 16, 2000 among
Sublessors, Parent and TowerCo, as the same may be amended from time to time.

1.4 AirTouch  Material  Adverse  Effect.  Means (i) an Event which has had or is
reasonably  likely to have a material adverse effect on the financial  condition
of the  Business  taken as a whole,  except any such  effect  resulting  from or
arising in connection with (a) this Agreement or the  transactions  contemplated
hereby,  (b) changes or  conditions  (including  without  limitation  changes in
technology,  law, or regulatory or market environment) affecting the industry in
which the owners or users of  communications  tower structures  operate,  or (c)
changes in economic,  regulatory or political conditions  generally,  or (ii) an
Event which has had or is reasonably likely to have a material adverse effect on
(x) the validity or enforceability  against  Sublessors of this Agreement or any
of the other Transaction Documents,  or (y) the ability of Sublessors to perform
their  obligations  under  this  Agreement  or  any  of  the  other  Transaction
Documents;  provided,  however,  that with  respect to any  individual  Closing,
clause (i) of this definition  shall be interpreted to refer only to the portion
of the  Business  which is the  subject  of the  Closing  at issue and all prior
Closings  hereunder,  taken as a whole,  and not to the portions of the Business
which are to be the subject of Closings subsequent to the Closing at issue.

1.5 Assets. Means the following: (a) all Towers of the applicable Sublessor; (b)
all of the  applicable  Sublessor's  rights  to all Tower  Sites;  (c) all Tower
Related  Assets  of  the  applicable   Sublessor;   (d)  all  rights  under  any
Governmental  Permits  (excluding FCC licenses) held exclusively with respect to
the  ownership or use of the Towers or Tower Sites of the  applicable  Sublessor
and not used or useful by the  applicable  Sublessor in any other part of its or
an Affiliate's  business and  operations,  to the extent that such  Governmental
Permits are  necessary to confer upon TowerCo the benefits to be provided  under
the  Sublease  (the  "Applicable  Governmental  Permits");  and  (e)  plans  and
specifications of the Towers and data (in electronic or  machine-readable  form)
relating to the Towers and third party  tenants and lessors  with respect to the
Towers,  subject,  however,  to the  exclusions set forth in Section 4(d) of the
Sublease, and to the exclusion of all Excluded Assets.

                                      -2-
<PAGE>   8


1.6 Business Day. Any day other than Saturday,  Sunday or a day on which banking
institutions  in either  San  Francisco,  California  or New York,  New York are
required or authorized to be closed.

1.7 Charter  Documents.  An entity's  certificate or articles of  incorporation,
bylaws, certificate defining the rights and preferences of securities,  articles
of  organization,  general  or limited  partnership  agreement,  certificate  of
limited  partnership,   limited  liability  company  agreement,   joint  venture
agreement or similar document governing the entity.

1.8      Code.  The Internal Revenue Code of 1986, as amended.

1.9 Contracts.  Any and all contracts,  authorizations,  approvals,  agreements,
licenses,  permits,  leases  of  real  and  personal  property,  deeds,  private
easements, rights-of-way and rights of access, other than Governmental Permits.

1.10 Default. Means (a) a breach, default or violation, (b) the occurrence of an
event that with or without the passage of time or the giving of notice, or both,
would  constitute  a breach,  default or  violation  or (c) with  respect to any
Contract, the occurrence of an event that with or without the passage of time or
the  giving of  notice,  or both,  would  give  rise to a right of  termination,
renegotiation  or  acceleration  or a right to  receive  damages or a payment of
penalties.

1.11 Encumbrance.  Any lien, mortgage, security interest, pledge, restriction on
transferability,  defect of title, option, easement, right of way, levy or other
claim,  charge or  encumbrance  of any  nature  whatsoever  on any  property  or
property interest, other than those relating to Governmental Permits.

1.12  Environmental  Condition.  Any  condition or  circumstance,  including the
presence of Hazardous Substances,  created by a Sublessor at any Tower Site that
did or does (a) require  abatement or correction under an  Environmental  Law or
(b) give rise to any civil or criminal  Liability  on the part of any  Sublessor
under any Environmental  Law relating to the ownership,  use or occupancy of the
Tower Sites.

1.13  Event.  The  existence  or  occurrence  of  any  act,  action,   activity,
circumstance,  condition,  event, fact,  failure to act,  omission,  incident or
practice, or any set or combination of any of the foregoing.

1.14     Excluded Assets.  The following are collectively referred to as the
"Excluded Assets" and are not included in the Assets:
         ---------------

(a) all  Communications  Facilities (as defined in the Sublease),  including but
not limited to AirTouch's  Improvements  and  Communications  Equipment (each as
defined in the Sublease);

(b)  the  Reserved  Space  as  described  in  the  Sublease,  including  without
limitation  all space at a Tower Site  occupied by AirTouch's  Improvements  and
Communications Equipment (each as defined in the Sublease) and non-exclusive use
of all real estate interests (including fee and leasehold  interests,  licenses,
rights-of-way  and easements) on which switch  equipment and

                                      -3-
<PAGE>   9

associated  loading docks,  patios,  offices and parking lots of Sublessors  or
their  Affiliates is located or necessary to such equipment's operation;

(c) any equipment or transmission systems used by AirTouch,  any other Sublessor
or any of Sublessors' Affiliates for the remote monitoring of the Towers;

(d) all  Intellectual  Property of Sublessors  or any  Affiliate of  Sublessors,
other than plans and  specifications  of the Towers and data (in  electronic  or
machine-readable  form) relating to third party tenants and lessors with respect
to the Towers;

(e)      any assets, properties or rights, including Contracts, that are not
exclusively Assets;

(f) all rights that accrue or will accrue to, and all rights  retained by and/or
granted to,  Sublessors  under this Agreement,  the Sublease or any of the other
Transaction  Documents,  including  the  consideration  paid  or to be  paid  to
Sublessors hereunder;

(g) any claims or rights  against third parties except to the extent such claims
or rights relate to the Assets;

(h)      assets of any Employee Plan or employee benefit arrangement;

(i)      the assets specified in Schedule 1.14; and

(j) any Tower Sites (and all Towers,  Tower Related  Assets and other assets and
rights  associated  with such Tower Sites)  excluded from the Assets or excluded
from becoming subject to the Sublease pursuant to Section 2.2 (Restricted Items)
hereof, or which are to remain the property of, or are to be for the benefit of,
any Sublessor pursuant to the Sublease.

1.15     FCC.  The Federal Communications Commission or any successor agency.

1.16 GAAP.  Generally accepted  accounting  principles set forth in the opinions
and pronouncements of the Accounting Principles Board and the American Institute
of  Certified  Public  Accountants  and  statements  and  pronouncements  of the
Financial  Accounting  Standards Board or in such other statements by such other
entity as may be approved by a significant segment of the accounting profession,
which are applicable to the circumstances as of the date of determination.

1.17 Governmental  Authority.  Any nation or government,  any state, province or
other  political   subdivision  thereof  or  any  entity  exercising  executive,
legislative,  judicial,  regulatory or administrative functions of or pertaining
to government.

1.18 Governmental Permits. All franchises, approvals,  authorizations,  permits,
licenses,  easements, leases, permits, concessions,  franchises,  registrations,
certificates  of  occupancy,  qualifications  and similar  rights and  approvals
obtained from any Governmental Authority.

                                      -4-
<PAGE>   10

1.19  Included  Towers.  Means (i) all Towers  listed on Annex I hereto (as such
Annex  existed  on the  date of this  Agreement)  the  construction  of which is
completed on or prior to the applicable Closing Date and are made subject to the
Sublease at such  Closing  and (ii) all  Additional  Towers made  subject to the
Sublease at such Closing.

1.20 Intellectual Property. Any patents,  patent applications,  reissue patents,
patents of addition, divisions, renewals, continuations,  continuations-in-part,
substitutions,  additions  and  extensions of any of the  foregoing,  fictitious
business names,  trade names,  logos,  registered and  unregistered  copyrights,
copyright  applications,   registered  and  unregistered  trademarks,  trademark
applications,   registered  and   unregistered   service  marks,   service  mark
applications,   technology  rights  and  licenses,  trade  secrets,  franchises,
know-how, inventions and other intellectual property.

1.21 Knowledge.  "AirTouch's  knowledge," "knowledge of AirTouch," or references
to the  "knowledge"  of any  Sublessor,  or words of similar  import,  means the
actual knowledge after inquiry  reasonable under the circumstances of any of the
following  persons who are employees of AirTouch holding the position (as of the
date hereof)  indicated after their name (and any person  succeeding to any such
position  prior to the Closing but only to the extent he or she acquired  actual
knowledge  after  inquiry  reasonable  under  the  circumstances):  Arun  Sarin,
President and Chief  Operating  Officer;  Nancy Hobbs,  Executive Vice President
(AirTouch Cellular) and General Manager,  Sierra Pacific Region; and Brian Shea,
Executive  Vice  President  (AirTouch  Cellular)  and General  Manager,  Western
Region.  "TowerCo's  knowledge"  or  "knowledge  of TowerCo" or words of similar
import  means  the  actual   knowledge  after  inquiry   reasonable   under  the
circumstances  of any of the  following  persons  who are  employees  of TowerCo
holding the position (as of the date hereof) indicated after their name (and any
person  succeeding  to any such  position  prior to the  Closing but only to the
extent he or she acquired actual  knowledge after inquiry  reasonable  under the
circumstances):  Stephen Clark,  Chief Executive  Officer;  David Tomick,  Chief
Financial Officer; Richard Byrne, Executive Vice President-Business Development;
Timothy   Biltz,   Chief   Operating   Officer;   Terry   Armant,   Senior  Vice
President-Operations;    and   Daniel   Hunt,   Vice    President-Finance    and
Administration.

1.22  Laws.  All  federal,  state,  county,  municipal  and  other  governmental
constitutions,  statutes,  ordinances, codes, regulations,  resolutions,  rules,
requirements and directives of any Governmental  Authority or arbitrator and all
decisions, judgments, writs, injunctions,  orders, decrees or demands of courts,
arbitrators,  administrative bodies and other authorities  construing any of the
foregoing.

1.23  Liability.  Any direct or indirect  liability,  indebtedness,  obligation,
cost, expense, claim, loss, damage, deficiency or guaranty of or by any Person.

1.24 Maximum Amount. For any Sublessor or TowerCo,  the Maximum Amount means ten
percent (10%) of the Exclusive  Commitment  Fee actually paid by TowerCo to such
Sublessor under this Agreement.

1.25     Other Entities.  Los Angeles SMSA Limited Partnership, a California
limited partnership, and Oxnard-Ventura-Simi Limited Partnership, a California
limited partnership.  Each of the Other Entities is referred to individually
herein as an "Other Entity."

                                      -5-
<PAGE>   11


1.26 Permitted  Encumbrances.  Means (i)  Encumbrances for Taxes not yet due and
payable,  (ii)  Encumbrances  or other  rights  of third  parties  disclosed  in
Schedule 3.5, (iii) worker's, carrier's, warehouseman's, materialman's and other
similar  liens,  (iv) with  respect  to Leased  Sites (as  defined  below in the
definition  of Tower  Sites),  any  Encumbrances  placed upon such real property
other than in connection  with  obligations  or  liabilities  of any  Sublessor,
including any lien encumbering the fee interest in such property, (v) easements,
rights of way or  similar  grants of  rights to a third  party for  access to or
across  any real  property,  including,  without  limitation,  rights  of way or
similar rights  granted to any utility or similar entity in connection  with the
provision of electric,  water, sewage,  telephone, gas or similar services, (vi)
the Tower  Collocation  Leases and the terms and  conditions  of Ground  Leases,
Tower Equipment  Leases,  Tower Service Contracts and other Tower Related Assets
affecting any Asset,  and (vii)  encumbrances  that are immaterial in character,
amount,  and extent,  and that do not detract from the value or interfere in any
material respect with the present use of the properties they affect.

1.27  Person.  Means any  natural  person  or  corporation,  firm,  association,
unincorporated  organization,  partnership,  trust,  estate,  limited  liability
company or other entity, or any Governmental Authority.

1.28 Prime Rate. The "Prime Rate" of interest, as published in the "Money Rates"
table of The Wall Street Journal, Eastern Edition, from time to time.

1.29 Real Property.  All assets consisting of realty  (including  appurtenances,
improvements  and fixtures  located on such  realty) and any other  interests in
real property  (including  fee interests and leasehold  interests and easements,
licenses,  rights-of-way  or other real property rights) used or held for use in
the  operation of the Assets as of the date hereof,  but  excluding  any and all
Excluded Assets.

1.30 Required Consents. Approvals and consents required pursuant to the terms of
any Tower Collocation  Agreement or Ground Lease in order to subject them to the
terms of the Sublease.

1.31 Significant Transaction. Means any transaction or series of transactions in
which (i)  Parent,  TowerCo  or any  Affiliate  of Parent or  TowerCo  issues or
guarantees debt (other than debt existing on the date hereof), whether through a
public or private  placement  or  pursuant to any other  facility,  in an amount
equal to or in excess  of  $500,000,000;  or (ii) (A) any  Person  purchases  or
otherwise  acquires,  directly or indirectly,  all or  substantially  all of the
assets used in the  operation  of the  business  of Parent and its  subsidiaries
taken as a whole,  or (B) any Change of  Control  (as  defined in the  Sublease)
occurs with respect to TowerCo or Parent.

1.32  Tax and  Taxes.  Any  and  all  governmental  or  quasi-governmental  fees
(including,  without limitation,  license,  filing and registration fees), taxes
(including,  without limitation,  income, gross receipts, franchise, sales, use,
property, real or personal, tangible or intangible taxes), interest equalization
and stamp taxes,  documentary  and real property  transfer  taxes,  assessments,
levies, imposts, duties, charges,  required contributions or withholdings of any
kind or nature whatsoever, together with any and all penalties, fines, additions
to tax, or interest  thereon.  For purposes of  determining  any Tax cost or Tax
benefit to any person, such amount

                                      -6-
<PAGE>   12


will be the actual cost or benefit recognized by such  person at the time of
actual  payment of the  additional Tax or actual recognition of the Tax benefit.
In the event that any payment or other amount is required to be determined on an
after-Tax  basis,  such payment or other amount will  initially be determined
without regard to any Tax cost or Tax benefit not actually recognized currently,
and appropriate adjustments will be made when and to the extent that such Tax
cost or Tax benefit is actually recognized.

1.33 Threshold Amount.  Means, for any Sublessor or TowerCo,  the greater of (i)
one percent (1%) of the Exclusive  Commitment  Fee payable to such  Sublessor or
(ii) $100,000.

1.34 Tower Related  Assets.  Means (a) the leases of rights to use spaces on the
Towers  that are  identified  in ANNEX III  hereto and  located  on Tower  Sites
(hereinafter defined) (the "Tower Collocation Leases") and security deposits (if
any) from tenants under the Tower  Collocation  Leases,  (b) all Contracts  with
respect to the management,  operation,  maintenance,  servicing and construction
of, and the  provision  of utility  services  to,  the  Towers  ("Tower  Service
Contracts"),  (c) any  existing  leases  (or  licenses  or other  Contracts)  of
Sublessors  for equipment or other personal  property which are included  within
the  definition  of Towers  ("Tower  Equipment  Leases"),  and (d) copies of, or
extracts  from,  all current  files and records of Sublessors to the extent that
such files or records contain information  related to the design,  construction,
management,  operation,  maintenance,  ownership,  occupancy  or  leasing of the
Assets; provided, however, that such term does not include any Excluded Assets.

1.35 Tower Sites. The sites of the Towers that are owned or leased by Sublessors
and are  identified  in ANNEX I  hereto,  including  all fee,  ground  leasehold
interests and easements  pertaining to such tower sites owned by Sublessors  and
including (i) a fee ownership in the real  property  associated  with the Towers
designated as "Owned Sites" in ANNEX I hereto, and (ii) the leasehold  interest,
leasehold  estate or other  possessory  interest or use right in and to the real
property  associated  with the Towers  designated  as "Leased  Sites" in ANNEX I
hereto  pursuant  to the  ground  leases  or  other  documents  related  thereto
identified in ANNEX II (the "Ground Leases");  provided, however, that such term
does not include any Excluded Assets.

1.36 Towers. The  communications  equipment and antenna support tower structures
situated at the locations that are identified on ANNEX I and are owned or leased
by  Sublessors;  provided,  however,  that such term  does not  include  (i) any
equipment,  property  or other  assets  placed upon the Towers or Tower Sites by
third parties  pursuant to Tower  Collocation  Leases or other Contracts or (ii)
any Excluded Assets.

1.37 TowerCo  Material  Adverse Effect.  An Event which has had or is reasonably
likely  to  have a  material  adverse  effect  on (i) the  assets,  liabilities,
business, prospects, condition (financial or otherwise) or results of operations
of  Parent  and its  subsidiaries  taken as a  whole,  except  any  such  effect
resulting  from  or  arising  in  connection  with  (a)  this  Agreement  or the
transactions  contemplated hereby, (b) changes or conditions  (including without
limitation  changes in  technology,  law, or regulatory  or market  environment)
affecting  the  industry  in which the owners or users of  communications  tower
structures  operate,  or  (c)  changes  in  economic,  regulatory  or  political
conditions  generally,  (ii) the validity or  enforceability  against TowerCo or

                                      -7-
<PAGE>   13


Parent  of this  Agreement  or any of the  Transaction  Documents,  or (iii) the
ability of TowerCo or Parent to perform its  respective  obligations  under this
Agreement or any of the Transaction Documents.

1.38 Transaction  Documents.  Collectively,  this Agreement,  the Sublease,  the
Master Lease, the Build-to-Suit  Agreement, the Site Marketing Agreement and the
escrow agreement referred to in Section 2.3(b) hereof.

1.39     Other Definitions.  In addition, the following terms have the meanings
 given them in the following sections:
         -----------------

Term                                                                   Section

AirTouch                   .........                                   Preamble
Applicable Governmental Permit......                                   1.5
Business                   .........                                   Recitals
Claim                      .........                                   11.3(a)
Closing                    .........                                   2.4
Closing Date               .........                                   2.4
Commercially reasonable efforts of Sublessor                           2.2(b)
Deposit                    .........                                   2.3(b)
Environmental Law          .........                                   3.8(b)
Exclusive Commitment Fee   .........                                   2.3(a)
Final Closing Date         .........                                   2.4
Ground Leases              .........                                   1.35
Hazardous Substance        .........                                   3.8(c)
Indemnifiable Damages      .........                                   11.1
Indemnified Sublessor Parties.......                                   11.2(a)
Indemnified TowerCo Parties.........                                   11.1(a)
Indemnitee                 .........                                   11.3(a)
Indemnitor                 .........                                   11.3(a)
Initial Closing Date       .........                                   2.4
Initial Closing Expiration Date.....                                   2.4
Joinder                    .........                                   1.25
Master Lease               .........                                   10.2(a)
Nonrecourse                .........                                   13.1(b)
Parent                     .........                                   Preamble
Parent SEC Reports         .........                                   5.6
Pending Transactions       .........                                   5.13
Permitted Schedule Updates .........                                   6.1(b)
Permitted Subleasehold Mortgagee....                                   13.2
Restricted Items           .........                                   2.2(a)
Site Marketing Agreement   .........                                   Recitals
Solicit                    .........                                   6.2
Sublease                   .........                                   Recitals
Sublessors                 .........                                   Preamble
Tower Collocation Leases   .........                                   1.34
Tower Equipment Leases     .........                                   1.34

                                      -8-
<PAGE>   14


Tower Service Contracts    .........                                   1.34
TowerCo                    .........                                   Preamble
TowerCo Parties            .........                                   Preamble
Transfer Taxes             .........                                   6.3(c)
ARTICLE 2
- ------------------
                                Leasing of Assets
2.1  Leasing  or  Subleasing  of  Assets.  Subject  to the terms and  conditions
hereinafter  set forth:  (i) at the Initial  Closing (as  hereinafter  defined),
TowerCo  hereby  agrees to execute  and deliver to  Sublessors,  and each of the
Sublessors  hereby  severally  agrees to execute  and  deliver to  TowerCo,  the
Sublease  and the Site  Designation  Supplements  (as  defined in the  Sublease)
relating to the Assets that are the subject of the Initial Closing,  and (ii) at
each  Subsequent  Closing (as  hereinafter  defined),  TowerCo  hereby agrees to
execute and deliver,  and each of the  applicable  Sublessors  hereby  severally
agrees to execute and deliver, the Site Designation  Supplements relating to the
Assets that are the subject of such Subsequent  Closing,  all as provided herein
and in the Sublease.

2.2      Restricted Items.

(a) Nothing in this Agreement  shall be construed as an attempt by any Sublessor
to lease or sublease to TowerCo  pursuant to the  Sublease,  or  otherwise  make
subject to the Sublease, any Contract,  Governmental Permit, franchise, claim or
asset  included in the Assets which,  in AirTouch's  judgment,  is unable by its
terms or by Law to be so leased,  subleased or made subject  without the consent
of any other Person (including any Governmental Authority),  unless such consent
shall have been given (a "Restricted Item").

(b) The  applicable  Sublessor  shall use  commercially  reasonable  efforts (as
defined herein) until the Initial Closing Date to obtain the relevant consent to
subject a  Restricted  Item to the  Sublease.  If,  despite  such  efforts,  the
applicable Sublessor is unable to obtain such consent on or prior to the Initial
Closing Date,  then TowerCo shall take the actions  specified in Schedule 2.2(b)
until  the  earlier  of the  Final  Closing  Date or the date  such  consent  is
obtained.  If such  consent is  obtained  prior to the Final  Closing  Date with
respect  to any  Restricted  Item,  such  item and the  related  Tower and other
associated  Assets shall be  subjected  to the Sublease at the next  practicable
Subsequent  Closing.  Pending  the  subjection  of any  Restricted  Item  to the
Sublease  pursuant  to the  applicable  consent,  such  Restricted  Item and the
related tower,  tower site and other associated assets and liabilities shall not
be deemed  part of the Assets or the subject of any  representation  or warranty
hereunder. Any Restricted Item(s) for which the consent required to subject such
item to the Sublease has not been obtained by the Final  Closing  Date,  and the
tower(s),  tower  site(s),  Contracts and other assets to which such  Restricted
Item(s)  relate,  shall be deemed  excluded from the Assets and deleted from the
Annexes hereto, and shall not be deemed to be the subject of any representation,
warranty  or  covenant  of  Sublessors   herein.  As  used  in  this  Agreement,
"commercially  reasonable  efforts" of a given  Sublessor  shall not include any
obligation  of  any   Sublessor  or  its   Affiliates  to  pay  money  or  other
consideration,  agree or commit to any  obligation,  Liability or condition,  or
forego,  surrender or waive any asset,  right or  privilege,  unless  Parent and
TowerCo  agree to reimburse or indemnify  such  Sublessor  for

                                      -9-
<PAGE>   15


obligations  and Liabilities  and otherwise make Sublessor "whole," in each case
on an after-Tax basis and as  determined  by Sublessor in its  reasonable
judgment,  and,  with respect to any given  Restricted  Item,  shall not include
any  requirement  of action other than as set forth in Schedule 2.2(a).

2.3      Exclusive Commitment Fee and Payment.

(a) The aggregate  consideration to be paid by TowerCo in return for Sublessors'
willingness  to execute  this  Agreement  and  Sublessors'  agreement  herein to
execute the Sublease,  Master Lease and Build-to-Suit Agreement on the terms and
conditions provided herein, shall be $155 million dollars ($155,000,000) in cash
for the Included Towers (as identified in Annex I hereto), subject to adjustment
as hereinafter provided the ("Exclusive  Commitment Fee"). At any given Closing,
TowerCo shall pay to the  Sublessors  whose  Included  Towers are the subject of
such Closing the product of (i) the number of such Included Towers multiplied by
(ii) three hundred sixty  thousand  dollars  ($360,000).  If the total number of
Included Towers at all Closings exceeds 430, then for all purposes hereunder the
Exclusive  Commitment  Fee shall be deemed to be increased by the product of (x)
three hundred sixty thousand dollars ($360,000) and (y) the amount by which such
total  number of Included  Towers  exceeds  430. If the total number of Included
Towers at all  Closings is less than 430,  then for all purposes  hereunder  the
Exclusive  Commitment  Fee shall be deemed to be reduced  by the  product of (x)
three hundred sixty thousand dollars  ($360,000) and (y) the amount by which 430
exceeds such total number of Included Towers.

(b) As partial  security  for  TowerCo's  and  Parent's  obligations  under this
Agreement (and to the extent provided in Section 12.3, as liquidated  damages in
the event of termination of this Agreement under the circumstances  specified in
such  Section),  by 5:00  p.m.,  California  time,  on the second  Business  Day
following  the date of this  Agreement,  TowerCo  shall  deposit  (as reduced in
accordance  with the  provisions of this Section,  the  "Deposit") the amount of
$23,000,000  into an escrow account,  under an escrow agreement in substantially
the form  attached  hereto as Exhibit B, with only such  changes  thereto as are
required by the escrow agent  thereunder  (the "Escrow  Agreement").  If TowerCo
fails to make such $23,000,000 Deposit by such time, then AirTouch may elect, in
its sole discretion,  to terminate this Agreement in full.  AirTouch and TowerCo
agree to  negotiate  in good  faith to enable  TowerCo,  at its  discretion,  to
replace such escrow arrangement with an irrevocable letter of credit in favor of
AirTouch (it being  understood that a pro rata portion,  based on the respective
numbers of Included Towers attributable to each respective  Sublessor,  shall be
for the benefit of the other Sublessors) in the amount of $23,000,000  issued in
a form mutually agreeable to AirTouch and TowerCo and by a financial institution
reasonably acceptable to AirTouch, as promptly as reasonably  practicable.  Upon
any Closing, the Deposit shall be reduced (either by a distribution of a portion
of the  escrowed  funds or by a  reduction  in the  letter of credit  commitment
amount) to that amount as equals $23,000,000 times a fraction, (i) the numerator
of which is the excess of (x) 430 over (y) the number of  Included  Towers as to
which Closings have theretofore  occurred,  and (ii) the denominator of which is
430.

(c) The  parties  acknowledge  and  agree  that  the  portion  of the  Exclusive
Commitment  Fee  paid  at a  Closing  is  intended  as  a  one-time  payment  in
consideration  of events  occurring at

                                      -10-
<PAGE>   16

or prior to such Closing, will have been fully earned as of such Closing, is not
dependent on events occurring subsequent thereto and is not for any reason
subject to apportionment or rebate.

(d) The portion of the Exclusive Commitment Fee applicable to a Closing shall be
allocated among the Assets for tax purposes in a manner consistent with the fair
market value set forth in an Allocation Schedule to be agreed to by AirTouch and
TowerCo as early as  practicable  prior to such Closing.  The parties shall file
all  Tax  returns   (including  amended  returns  and  claims  for  refund)  and
information  reports in a manner consistent with such values. The obligations in
this paragraph shall survive the Closing.

2.4 Completion of Transaction. The execution and delivery of the Sublease and of
Site Designation Supplements under the Sublease shall be completed in accordance
with  Article 10 (each such  closing  being  referred  to as a  "Closing").  The
initial Closing is referred to herein as the "Initial  Closing" and each Closing
occurring  after the Initial  Closing is referred to as a "Subsequent  Closing."
The Initial  Closing shall  involve no fewer than 105 Included  Towers and shall
occur on such date, no later than August 15, 2000 (or such later date, not later
than three  months  after  August 15,  2000,  as AirTouch may elect upon written
notice to  TowerCo  provided  that  AirTouch  is not in  breach in any  material
respect of its covenants  hereunder (with August 15, 2000 or such later date, as
applicable, being referred to as the "Initial Closing Expiration Date")) upon at
least five (5) Business Days' prior written notice to TowerCo from AirTouch; the
date of such  Initial  Closing is  referred  to herein as the  "Initial  Closing
Date." Each  Subsequent  Closing shall involve no fewer than 45 Included  Towers
(or,  with respect to the last such Closing,  such smaller  number as represents
the remaining Towers) and shall occur on one or more month-ends after the end of
the month in which the Initial  Closing Date falls (each, a "Subsequent  Closing
Date") upon at least ten (10)  Business  Days' prior  written  notice to TowerCo
from AirTouch.  References  herein to the "Closing" and the "Closing Date" shall
mean the Initial  Closing and the Initial  Closing Date, one or more  Subsequent
Closings  and  Subsequent  Closing  Dates or all of the  foregoing  closings and
closing dates collectively,  as the context requires. The last of the Subsequent
Closings  (the  "Final  Closing")  is  scheduled  to occur on a date (the "Final
Closing  Date")  which shall not be later than six (6) months  after the Initial
Closing Date. Each Closing shall take place in the offices of Pillsbury  Madison
& Sutro LLP, 50 Fremont Street,  San Francisco,  California 94105, or such other
place as the parties may agree.

2.5 Additional Due Diligence For each Tower Site designated as a "Due
Diligence Site" on Schedule 3.8 hereof,  TowerCo shall  promptly  commence
additional due diligence,  at its sole  cost  and  expense,  as to the  presence
of  Hazardous Substances or an Environmental Condition on or under such site,
and within sixty (60) calendar days after the date hereof, TowerCo shall, for
each such site: (i) provide  the   applicable   Sublessor  with  written  notice
that  TowerCo  has satisfactorily  completed  such due diligence  investigation
and is prepared to subject such Tower and Tower Site to the terms and
conditions of this Agreement (including  without  limitation   TowerCo's
obligation  to  pay  the  Exclusive Commitment  Fee upon the Closing for such
Tower),  in which case such Tower and Tower Site shall be deemed to be subject
to the terms and conditions hereof upon the  applicable  Sublessor's  receipt
of  such  notice;  or  (ii)  provide  the applicable  Sublessor  with  written
notice (A) that  states  that  TowerCo has determined  that, in TowerCo's
good-faith  judgment,  the presence of Hazardous Substances or other
Environmental  Condition on or under such site is reasonably likely  to
materially  impair  TowerCo's  operations  at such  site or to cause TowerCo to
become subject to a material Liability

                                      -11-
<PAGE>   17

(including  remediation costs) under any  Environmental  Law and (B) that
describes in  reasonable  detail the facts underlying the foregoing
determination, in which case such Tower and Tower Site and all Contracts and
Tower Related Assets relating to such Tower and Tower Site  shall be deemed
Excluded  Assets  for all  purposes  hereunder,  shall be deleted from the
Annexes hereto and shall not be deemed to be the subject of any representation,
warranty or covenant of Sublessors herein;  provided,  however, that  AirTouch
(on behalf of the  applicable  Sublessor)  shall have the right, within ten (10)
calendar days of receipt of TowerCo's written notice, to dispute in good faith
whether  TowerCo's stated judgment is unreasonable by invoking the dispute
resolution  procedures  set forth in this  Agreement.  If TowerCo fails within
the foregoing 60-day period to provide the applicable  Sublessor with the
notice contemplated by clause (i) or (ii) above, then TowerCo shall be deemed to
hvae  satisfactorily  completed such due diligence  investigation and such Tower
and Tower  Site  shall,  upon such 60th day,  be subject to all of the terms and
conditions of this Agreement  (including without limitation TowerCo's obligation
to pay the Exclusive Commitment Fee upon the Closing for such Tower).

2.6 References Applicable to Individual Closings. As used in this Agreement, the
defined term "Assets" and all related defined terms including "Included Towers,"
"Tower Sites," "Ground Leases," "Tower Service  Contracts,"  "Tower  Collocation
Leases," "Tower Equipment Leases" and "Applicable Governmental Permits," and all
references to Liabilities in respect of any of the foregoing,  are understood to
refer to (i) the Assets  (together  with certain  Liabilities as provided in the
Sublease)  that are the subject of the Initial  Closing  only,  with  respect to
representations,  warranties, covenants and conditions applicable to the Initial
Closing,  and (ii) the Assets (together with certain  Liabilities as provided in
the Sublease)  that are the subject of a given  Subsequent  Closing  only,  with
respect to representations,  warranties,  covenants and conditions applicable to
such Subsequent Closing.

         All representations,  warranties and indemnification obligations of any
Sublessor  and of TowerCo and Parent under this  Agreement  shall be deemed with
respect to a particular  Closing to refer to those Assets (together with certain
Liabilities  as provided in the  Sublease)  leased or subleased to TowerCo under
the Sublease or otherwise made subject to the Sublease at such Closing.

ARTICLE 3
                   Representations and Warranties of AirTouch
         As a material inducement to TowerCo to enter this Agreement,  except as
disclosed  to  TowerCo  in  the  Schedules  to  this  Agreement  and  the  other
Transaction  Documents to which they are a party (with each  disclosure  made in
the Schedules in response to any Section of these representations and warranties
being deemed to be disclosed in response to, and to qualify,  each other Section
of these  representations  and warranties),  AirTouch represents and warrants to
TowerCo as follows:

3.1  Organization and  Qualification.  AirTouch is a corporation duly organized,
validly  existing and in good  standing  under the laws of its  jurisdiction  of
incorporation  or
                                      -12-
<PAGE>   18


formation and has all requisite  corporate power and authority to own, lease and
use its Assets as they are currently owned, leased and used.

3.2  Authority.  AirTouch has the corporate  right,  power,  legal  capacity and
authority to execute,  deliver and perform its obligations  under this Agreement
and the other  Transaction  Documents to be executed  and  delivered by AirTouch
pursuant to this  Agreement.  The execution and delivery of, and  performance of
the  obligations  contained in, this Agreement by AirTouch and the  transactions
contemplated hereby have been, and all other Transaction  Documents delivered by
AirTouch and all other documents,  instruments and certificates  delivered or to
be  delivered by AirTouch  pursuant to this  Agreement  have been,  or as of the
Closing will be, duly authorized by all necessary  corporate  action on the part
of AirTouch.

3.3  Enforceability.  The  terms  and  provisions  of  this  Agreement  and  all
Transaction  Documents made or delivered from time to time by AirTouch hereunder
constitute  valid and  legally  binding  obligations  of  AirTouch,  enforceable
against AirTouch in accordance with the terms hereof and thereof.

3.4  Consents and  Approvals.  Except for (x)  filings,  consents and  approvals
required under Tower Collocation  Leases and Ground Leases, and (y) the filings,
consents and  approvals  specified in Schedule  3.4,  neither the  execution and
delivery by AirTouch of this  Agreement  or the other  Transaction  Documents to
which it is a party, nor the performance of the transactions  performed or to be
performed  by AirTouch  thereunder,  will (i)  require  any  filing,  consent or
approval or constitute a Default  under (A) any Law to which  AirTouch or any of
the Assets owned by it is subject,  (B) the Charter Documents of AirTouch or (C)
any Contract or Governmental Permit to which AirTouch is a party or by which any
of the Assets owned by it is bound,  except with respect to clauses (A) and (C),
such  failures  to make or obtain  such  filing,  consent or  approval  and such
Defaults  that,  individually  or in the  aggregate,  would not have an AirTouch
Material  Adverse  Effect,  or (ii) result in the creation or  imposition of any
Encumbrance  upon any of the Assets  owned by  AirTouch,  other  than  Permitted
Encumbrances.

3.5 Title and  Encumbrances.  To  AirTouch's  knowledge,  except as disclosed in
Schedule 3.5,  AirTouch will at the applicable  Closing have good and marketable
title  to,  or,  with  respect  to Assets  subject  to a Ground  Lease,  a valid
leasehold or other  possessory  interest in or use right with respect to, all of
the  Assets  of  AirTouch,   free  from  any   Encumbrances   except   Permitted
Encumbrances. To AirTouch's knowledge, the use of such Assets of AirTouch is not
subject  to  any  Encumbrances,   other  than  Permitted  Encumbrances  and  the
Encumbrances  described  in  Schedule  3.5,  and such  use  does not  materially
encroach on the  property or rights of any other  Person  except as disclosed in
such Schedule. To AirTouch's knowledge, except as disclosed in Schedule 3.5, all
of the Towers of AirTouch are in good operating condition and repair, subject to
normal wear and  maintenance,  have been maintained in a manner  consistent with
generally accepted standards of sound engineering  practice,  and are useable to
support the antennae of AirTouch and the other tenants on the existing Towers of
AirTouch as of the date  hereof,  except for such  defects as are  disclosed  on
Schedule  3.5 or as would not cost more than  $50,000 to correct with respect to
each such  Tower or more than  $2,500,000  for all such  Towers.  To  AirTouch's
knowledge,  except as disclosed in Schedule 3.5 or where the failure  would not,
individually or in the aggregate,  have an AirTouch Material Adverse Effect, all
of the transmitting towers, ground radials, guy anchors,  transmitting buildings
and  related
                                      -13-
<PAGE>   19


improvements,  if any,  constituting  Assets  and  located on real
property  owned or leased by  AirTouch  are located  entirely  on real  property
constituting a part of the Assets.

3.6  Governmental  Permits.  To  AirTouch's  knowledge,  except  as set forth on
Schedule  3.6,  AirTouch  has all  Governmental  Permits  that are  necessary to
operate its Towers as operated on the date  hereof,  except where the failure to
obtain such  Governmental  Permit would not,  individually  or in the aggregate,
have an AirTouch Material Adverse Effect. To AirTouch's knowledge, except as set
forth in Schedule 3.6, AirTouch is in compliance with such Governmental Permits,
except  for such  failures  to  comply  as  would  not,  individually  or in the
aggregate,  have an AirTouch  Material  Adverse  Effect.  Except as set forth in
Schedule 3.6, or where the failure would not,  individually or in the aggregate,
have an AirTouch Material Adverse Effect,  (i) none of the Governmental  Permits
owned by AirTouch is, to AirTouch's  knowledge,  subject to any  restriction  or
condition  that limits the  ownership or  operations  of the Assets as currently
owned and operated,  except for restrictions and conditions generally applicable
to  Governmental  Permits  of such  type,  (ii)  to  AirTouch's  knowledge,  the
Governmental  Permits owned by AirTouch are valid and in good  standing,  are in
full force and effect and are not impaired by any act or omission of AirTouch or
its officers,  directors,  partners,  employees or agents, and the ownership and
operation  of the Assets to  AirTouch's  knowledge  are in  accordance  with the
Governmental Permits owned by AirTouch, (iii) no such Governmental Permit is the
subject of any pending or, to  AirTouch's  knowledge,  threatened  challenge  or
proceeding  to  revoke  or  terminate  any such  Governmental  Permit,  and (iv)
AirTouch has no reason to believe that any such Governmental  Permit will not be
renewed  in its name by the  granting  Governmental  Authority  in the  ordinary
course.

3.7 Contracts.  Schedule 3.7 identifies all Contracts of the following  types to
which AirTouch is a party,  or by which it is bound,  with respect to the Assets
(other than any Contract which is neither a Tower Collocation Lease nor a Ground
Lease and (i) is  terminable  by a party on not more than  sixty  (60)  calendar
days' notice  without any  Liability,  or (ii) under which the  obligation  of a
party  (fulfilled  and to be fulfilled  under the current  term thereof  without
taking  optional  extensions  into  account)  involves  an  amount  of less than
$100,000 (a "Minor Contract"),  or (iii) is specified in clauses (c) through (e)
below which is entered  into after the date hereof in  compliance  with  Section
6.1):

(a)  Contracts  which  are  Ground  Leases  for  Tower  Sites  for  which  Tower
construction has been completed, disclosing for each the location of the related
Tower Site, the identity of the lessor,  the expiration date of the current term
under the  lease,  and the  aggregate  amount of the rental  (including  revenue
sharing) paid to the lessor by AirTouch  thereunder for the month ended December
31, 1999;

(b)  Contracts  in effect as of December  31,  1999 which are Tower  Collocation
Leases, disclosing for each the location of the related Tower Site, the identity
of the lessee,  the expiration date of the current term under the lease, and the
amount of the rental paid by the lessee to AirTouch thereunder (i) for the month
ended July 31,  1999,  with  respect to Tower  Collocation  Leases  that were in
effect as of July 31, 1999, and (ii) for the month ended December 31, 1999, with
respect to Tower Collocation Leases that were entered into after July 31, 1999;

                                      -14-
<PAGE>   20

(c)  Contracts  in effect as of  December  31,  1999  which are Tower  Equipment
Leases,  disclosing for each the location of the related Tower Site, the type of
equipment leased, the identity of the lessor, the expiration date of the current
term under the lease and the amount of the rental paid to the lessor by AirTouch
thereunder for the month ended December 31, 1999;

(d)  Contracts  in effect  as of  December  31,  1999  which  are Tower  Service
Contracts,  disclosing  for each the  location  of the related  Tower Site,  the
identity of the service provider,  the type of service provided,  the expiration
date of the current  term under the  Contract and the amount of the fees paid by
AirTouch to the service  provider  thereunder  for the month ended  December 31,
1999;

(e) Contracts under which any Encumbrances,  other than Permitted  Encumbrances,
exist with respect to the Assets of AirTouch; and

(f) Contracts  (other than those  described in any of (a) through (e) above) (i)
which  relate to the Towers or Tower Sites of AirTouch  which were  entered into
after  December 31, 1999 and which were not made in the  ordinary  course of the
business of AirTouch or (ii) which were made in the ordinary  course of business
and involve remaining payments under any such Contract of more than $100,000.

         The  Contracts  listed in  Schedule  3.7 are  referred to herein as the
"AirTouch  Contracts."  To  AirTouch's  knowledge,  and except as  identified in
Schedule 3.7, AirTouch is not in Default under any AirTouch Contract, except for
Defaults  that would not,  individually  or in the  aggregate,  have an AirTouch
Material  Adverse  Effect.  To  AirTouch's  knowledge and except as disclosed in
Schedule 3.7, (i) AirTouch has not received any written  communication  from, or
given any written  communication to, any other party indicating that AirTouch or
such other party, as the case may be, is in Default under any AirTouch Contract,
except for Defaults that would not,  individually  or in the aggregate,  have an
AirTouch  Material  Adverse  Effect,  (ii) none of the other parties to any such
AirTouch Contract is in Default  thereunder in any material  respect,  and (iii)
each such  AirTouch  Contract  is in full force and  effect  and is  enforceable
against the other parties  thereto in accordance  with its terms,  except to the
extent  that  such   enforcement  may  be  limited  by  applicable   bankruptcy,
reorganization,  insolvency  and other  Laws of  general  application  affecting
enforcement of creditors'  rights generally or by general  principles of equity,
and  except to the  extent  that the  failure to be in full force and effect and
enforceable  would  not,  individually  or in the  aggregate,  have an  AirTouch
Material Adverse Effect.

3.8      Environmental Laws.

(a) Except as disclosed on Schedule  3.8, to AirTouch's  knowledge:  (i) none of
AirTouch's  operations on the Real Property of AirTouch is currently  subject to
any  judicial  or  administrative   proceeding  alleging  the  violation  of  an
Environmental  Law; (ii) none of the Real Property of AirTouch is the subject of
any  investigation by any Governmental  Authority  concerning any release of any
Hazardous  Substance on the Real  Property of AirTouch;  (iii)  AirTouch has not
filed any written notice under any  Environmental Law indicating past or present
treatment,  storage or  disposal of a  hazardous  waste on the Real  Property or
reporting a spill or release of a Hazardous  Substance into the environment from
its  operations on the Real
                                      -15-
<PAGE>   21


Property of AirTouch;  (iv) no lien in favor of any Governmental  Authority for
(A) any liability under  Environmental  Laws, or (B)damages arising from or
costs incurred in response to a release of any Hazardous Substance  into the
environment  has been filed or  attached to any of the Real Property of AirTouch
(other than Permitted  Encumbrances);  (v) AirTouch has not been  notified  that
it is  potentially  liable  (including  as a  "potentially responsible  party"),
or has  received  any  request for  information  or other correspondence
concerning  its  potential  liability  with  respect to the Real Property, under
the  Comprehensive  Environmental  Response,  Compensation  and Liability Act of
1980, as amended,  the Resource  Conservation  Recovery Act, as amended,  or any
similar  state Law;  (vi)  AirTouch  has not  entered  into or received any
consent decree,  compliance  order or  administrative  order issued pursuant to
any  Environmental  Law with respect to the Real  Property,  or is a party in
interest in any  judgment,  order,  writ,  injunction  or decree issued
pursuant  to any  Environmental  Law with  respect to the Real  Property;  (vii)
AirTouch is in compliance with all  Environmental  Laws with respect to the Real
Property,  except where the failure to be so in compliance,  individually  or in
the aggregate,  would not have an AirTouch  Material Adverse Effect;  and (viii)
except for  batteries,  generators and  associated  above-ground  fuel tanks and
other substances  commonly used in the industry  necessary for the operation and
maintenance  of the Assets,  AirTouch has not installed or used any  underground
storage  tanks or Hazardous  Substances,  and there are no  underground  storage
tanks or Hazardous  Substances,  on any Real Property constituting a part of the
Assets.

(b) "Environmental Law" means a law, regulation, statute or ordinance pertaining
to land use, air, soil, surface water or groundwater  (including the protection,
cleanup, removal,  remediation or damage thereof) including, without limitation,
the following laws: (i) Clean Air Act (42 U.S.C.  ss. 7401 et seq.);  (ii) Clean
Water Act (33 U.S.C. ss. 1251 et seq.); (iii) Resource Conservation and Recovery
Act (42 U.S.C. ss. 6901 et seq.);  (iv)  Comprehensive  Environmental  Response,
Compensation  and Liability Act (42 U.S.C.  ss. 9601 et seq.); (v) Safe Drinking
Water Act (42 U.S.C. ss. 300f et seq.);  and (vi) Toxic  Substances  Control Act
(15 U.S.C. ss. 2601 et seq.).

(c) "Hazardous  Substance" means any matter that is designated or regulated as a
pollutant,  contaminant  or hazardous or toxic  substance,  constituent or waste
under any Environmental Law.

3.9  Litigation.  Except as set forth on Schedule  3.9, (a) there is no material
claim,  grievance,   lawsuit,  action,  arbitration,   administrative  or  other
proceeding  or formal  governmental  investigation  pending  or,  to  AirTouch's
knowledge,  threatened  against  AirTouch  or  any of the  Assets,  that  would,
individually or in the aggregate,  have an AirTouch Material Adverse Effect; and
(b) there is no material outstanding or unsatisfied judgment, order or decree to
which AirTouch is a party and which relates to the Assets,  except such as would
not, individually or in the aggregate, have an AirTouch Material Adverse Effect.

3.10  Commissions.  AirTouch has not entered into an  agreement,  commitment  or
obligation  with regard to any brokerage  commission or finder's fee which would
be  payable  by or  result  in  any  Liability  to  TowerCo  arising  out of the
execution,  delivery or performance  of this Agreement or the other  Transaction
Documents or the transactions contemplated hereby and thereby.

                                      -16-
<PAGE>   22

3.11     Real Property.

(a) Zoning. To AirTouch's  knowledge,  except as set forth on Schedule 3.11, the
ownership,  lease or use of the real property included in the Assets of AirTouch
or subject to  AirTouch's  Ground Leases is in  compliance  with all  applicable
zoning,  wetlands and other land use requirements where the failure to so comply
would   materially   limit   AirTouch's   ability  to  use  such  real  property
substantially  as  heretofore  used,  including  the  addition of tenants to the
Towers.

(b)  Utility  Services.  Except as set forth on  Schedule  3.11,  (i) the water,
electric,  gas and sewer utility services and the septic tank and storm drainage
facilities  currently  available to the Tower Sites of AirTouch are adequate for
the  present   use  of  such  Tower   Sites  by  AirTouch   and  are  not  being
misappropriated by AirTouch but rather are being supplied to AirTouch by utility
companies  or  municipalities   pursuant  to  contracts  or  tariffs  which,  to
AirTouch's  knowledge,  are valid  and in full  force  and  effect,  and (ii) to
AirTouch's knowledge, there is no condition which will result in the termination
of the present  access from such Tower Sites to such utility  services and other
facilities.

(c) Access. To AirTouch's  knowledge,  and except as disclosed in Schedule 3.11,
AirTouch has obtained all Governmental  Permits (where required),  easements and
rights-of-way which are reasonably necessary to provide vehicular and pedestrian
ingress and egress to and from its Tower Sites for the purposes used by AirTouch
in the  ordinary  course.  To  AirTouch's  knowledge,  no action is  pending  or
threatened  which would have the effect of  terminating  or materially  limiting
such access.

(d) Eminent Domain.  Except as set forth on Schedule 3.11, AirTouch has received
no written notice that any  Governmental  Authority  having the power of eminent
domain over any of the real  property  included  in the Assets of  AirTouch  has
commenced or intends to exercise the power of eminent  domain or a similar power
with  respect  to all or any  material  part of such real  property.

(e) Public Improvements.  To AirTouch's knowledge,  no work for municipal
improvements has been commenced on or in connection with the "Owned Sites"
included in the Assets that are owned by AirTouch.  AirTouch  has  received no
written  notice that any material  assessment for public improvements has been
made against any such real property which remains unpaid.

3.12 Absence of Certain Changes or Events. Since December 31, 1999, AirTouch has
made reasonable efforts consistent with past practice to preserve  relationships
with customers,  suppliers,  employees,  lessors, licensors, tenants, licensees,
distributors and others with whom AirTouch has a material  business or financial
relationship  with respect to its Assets.  Except as set forth on Schedule 3.12,
since  December 31, 1999,  AirTouch has conducted its  operations  regarding its
Assets  in the  ordinary  course  of  business  consistent  with  past  practice
(including  with respect to the collection of  receivables,  payment of payables
and other liabilities and capital expenditures).

                                      -17-
<PAGE>   23

3.13 Availability of Documents. AirTouch has made available to TowerCo copies of
all  Contracts  specifically  identified  in the Schedules to this Article 3. To
AirTouch's knowledge, such copies are true and complete in all material respects
and include all material  amendments,  supplements and modifications  thereto or
waivers currently in effect thereunder.

3.14  Compliance with  Applicable  Law. To AirTouch's  knowledge,  except as set
forth on Schedule  3.14,  AirTouch has  conducted  its business  relating to the
Assets and owned and operated the Assets in accordance  with all applicable Laws
(excluding  Environmental Laws), except for such failures as, individually or in
the aggregate, would not have an AirTouch Material Adverse Effect. Except as set
forth on Schedule 3.14,  AirTouch is not charged by any  Governmental  Authority
with, and, to AirTouch's  knowledge is not threatened or under  investigation by
any Governmental Authority with respect to, any Default under any applicable Law
relating  to the  ownership  and  operation  of the Assets or the conduct of the
Business that, individually or in the aggregate, would have an AirTouch Material
Adverse Effect.

3.15  No  Other  Warranties.  Except  for  the  representations  and  warranties
expressly  set forth in this  Article 3 and in  Article  4, the Assets are being
leased or  otherwise  made  subject to the terms of the Sublease by AirTouch and
the other  Sublessors  as is,  where is, and with all  faults,  and there are no
other  warranties  being made by  AirTouch  or any other  Sublessor  (INCLUDING,
WITHOUT LIMITATION,  ANY WARRANTY OF HABITABILITY,  MERCHANTABILITY,  CONDITION,
DESIGN, WORKMANSHIP,  OPERATION,  STRUCTURAL INTEGRITY OR FITNESS OR SUITABILITY
FOR A PARTICULAR PURPOSE, OR ABSENCE OF LATENT OR OTHER DEFECTS,  WHETHER OR NOT
DISCOVERABLE),  express or implied, in connection with the leasing or subleasing
of the Assets, the subjection of the Assets to the terms of the Sublease, or the
other  transactions  contemplated by this Agreement,  the Sublease and the other
Transaction Documents.

ARTICLE 4
                Representations and Warranties of Other Entities
         By and as of the  time of its  execution  of this  Agreement,  and as a
material  inducement  to  TowerCo  to enter  into this  Agreement  and the other
Transaction  Documents to which it is a party,  each Other Entity (severally and
not jointly and each solely with  respect to itself)  makes the  representations
and warranties to TowerCo set forth in Article 3, subject to the  disclosures in
the Schedules to this Agreement  (with each  disclosure made in the Schedules in
response to any Section of such  representations  and warranties being deemed to
be  disclosed  in  response  to,  and to  qualify,  each  other  Section of such
representations and warranties);  provided,  however,  that for purposes of such
representations  and warranties,  (i) all references in Article 3 to AirTouch or
its respective business, operations, assets, properties and liabilities shall be
deemed  replaced  with  references  to  such  Other  Entity  and  its  business,
operations,  assets,  properties  and  liabilities,  and (ii) all  references to
AirTouch's  status as a corporation in Section 3.1, and to AirTouch's  corporate
right,  power, legal capacity and authority and corporate action in Section 3.2,
shall be deemed  replaced  with  references to such Other  Entity's  status as a
partnership  and its partnership  right,  power and legal capacity and authority
and partnership action, as applicable.

                                      -18-
<PAGE>   24

                                    ARTICLE 5


              Representations and Warranties of TowerCo and Parent

As a material inducement to Sublessors to enter into this Agreement and the
other  Transaction  Documents to which they are parties,  TowerCo and Parent
jointly and severally  represent and warrant to Sublessors the following for the
benefit of Sublessors:

5.1 Organization and Qualification.  Each of Parent and TowerCo is a corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State of Delaware  and,  prior to Closing,  will be duly  authorized to transact
business in all states in which the Towers which are the subject of such Closing
are located.  Each of Parent and TowerCo has all necessary  corporate  power and
authority to own, lease and utilize its respective  properties and assets and to
engage  in the  business  or  businesses  in which it has been and is  presently
engaged and in the places where its property and assets are now owned, leased or
utilized or as such  business is now  conducted.  Each of Parent and TowerCo has
provided to AirTouch true, correct and complete copies of its respective Charter
Documents.

5.2 Authority.  Each of Parent and TowerCo has the corporate right, power, legal
capacity and  authority to execute,  deliver and perform its  obligations  under
this Agreement, the other Transaction Documents, and the documents,  instruments
and  certificates to be executed and delivered by it pursuant to this Agreement.
The execution,  delivery and performance of this Agreement by Parent and TowerCo
and  the  transactions   contemplated  hereby  have  been,  and  all  documents,
instruments  and  certificates  have  been or as of the  Closing  will be,  duly
authorized by all necessary  corporate action on the part of Parent and TowerCo,
respectively.

5.3  Enforceability.  The terms and provisions of this Agreement,  and all other
Transaction  Documents  made or delivered from time to time by Parent or TowerCo
hereunder,  constitute  valid and  legally  binding  obligations  of Parent  and
TowerCo,  respectively,  enforceable against Parent and TowerCo (as the case may
be) in accordance with the terms hereof and thereof.

5.4  Approvals.  Neither the  execution and delivery by Parent or TowerCo of the
Transaction  Documents  to  which  it is a  party,  nor the  performance  of the
transactions performed or to be performed by Parent or TowerCo thereunder,  will
(i) require any filing,  consent or approval or  constitute a Default  under (A)
any Law to  which  Parent,  TowerCo,  their  subsidiaries  or  their  respective
properties  and assets  are  subject,  (B) the  Charter  Documents  of Parent or
TowerCo, or (C) any credit agreement or other Contract or Governmental Permit to
which Parent,  TowerCo or any of their  Affiliates is a party or by which any of
the  properties  and assets of Parent,  TowerCo  or any of their  Affiliates  is
bound,  except  with  respect to clauses (A) and (C),  such  failures to make or
obtain such filing, consent or approval and such Defaults that,  individually or
in the aggregate,  would not have a TowerCo  Material  Adverse  Effect,  or (ii)
result  in the  creation  or  imposition  of  any  Encumbrance  upon  any of the
properties or assets of Parent or TowerCo, other than Permitted Encumbrances.

5.5  Commissions.  Neither  Parent nor TowerCo has entered  into any  agreement,
commitment or obligation with regard to any brokerage commission or finder's fee
or similar
                                      -19-
<PAGE>   25


payment which would be payable by or will result in any Liability to any
Sublessor,  arising out of the  execution,  delivery or performance of this
Agreement or the other  Transaction  Documents or the transactions  contemplated
hereby and thereby.

5.6 SEC Reports. Parent has filed all required forms, reports and documents with
the SEC since September 30, 1998 (collectively,  the "Parent SEC Reports").  The
Parent SEC Reports  complied,  as of their  respective  dates,  in all  material
respects with all  applicable  requirements  of the  Securities  Act of 1933, as
amended,  and the  Securities  Exchange  Act of 1934,  as  amended.  As of their
respective dates, none of the Parent SEC Reports, including, without limitation,
any financial  statements  or schedules  included or  incorporated  by reference
therein, contained any untrue statement of a material fact or omitted to state a
material  fact  required to be stated or  incorporated  by reference  therein or
necessary in order to make the statements therein, in light of the circumstances
under which they were made,  not  misleading.  There have been filed as exhibits
to, or  incorporated  by  reference  in,  the Parent SEC  Reports  and  Parent's
Registration  Statement  on Form S-1 as filed  with the SEC and last  amended on
January 31, 2000, all Contracts  which,  as of the date hereof,  are material as
described in Item 601(b)(10) of Regulation S-K. Parent has heretofore  delivered
to AirTouch,  in the form filed with the SEC, all of the Parent SEC Reports. The
audited  consolidated  financial  statements and the unaudited interim financial
statements of Parent, including in each case the notes thereto,  included in the
Parent SEC Reports have been prepared in accordance  with GAAP, and such balance
sheets,  including the related notes, fairly present the consolidated  financial
position,  assets and  liabilities  (whether  accrued,  absolute,  contingent or
otherwise)  of  Parent  and its  subsidiaries  at the dates  indicated  and such
consolidated   statements  of  income,   changes  in  stockholders'  equity  and
statements of cash flow fairly present the  consolidated  results of operations,
changes  in  stockholders'  equity  and  cash  flow of  Parent  for the  periods
indicated,  subject, in the case of the unaudited interim financial  statements,
to normal,  recurring  audit  adjustments.  The unaudited  financial  statements
included in the Parent SEC Reports contain all adjustments,  which are solely of
a normal recurring nature, necessary to present fairly the results of operations
and changes in stockholders'  equity and financial position for the periods then
ended.

5.7 Absence of Certain Changes.  Since December 31, 1999, except as described in
Schedule 5.7 or the Parent SEC Reports filed after such date, each of Parent and
TowerCo has conducted its business solely in the ordinary course consistent with
past practice and neither  Parent nor TowerCo has been subject to any Event that
would have a TowerCo Material Adverse Effect.

5.8 Threatened or Pending  Litigation.  There is no dispute,  claim,  grievance,
lawsuit,  action,  arbitration,  administrative  or other  proceeding  or formal
governmental  investigation  pending  or, to Parent's  or  TowerCo's  knowledge,
threatened  against  Parent,  TowerCo,  any Affiliate of TowerCo or any of their
respective  properties,  assets or operations that would have a TowerCo Material
Adverse Effect.

5.9 Funds Available for Exclusive Commitment Fee. TowerCo has sufficient cash or
cash equivalents to pay the Exclusive Commitment Fee when due hereunder.

5.10  Capitalization.  Each of Parent and TowerCo has authorized  capital stock,
and shares of capital stock  outstanding  and reserved for issuance  pursuant to
options,  warrants and
                                      -20-
<PAGE>   26


convertible and exchangeable securities outstanding as of December 31, 1999,  in
each case as  identified  in Schedule  5.10.  All of such outstanding  capital
stock has been duly  authorized and validly  issued,  fully paid and
nonassessable  and is not subject to any preemptive or similar rights. There are
no existing subscriptions,  options, warrants, convertible securities, calls,
commitments,  agreements,  conversion  rights  or  other  rights  of any
character  (contingent  or  otherwise)  that are  binding  on Parent or  TowerCo
calling for or requiring the issuance,  transfer,  sale or other  disposition of
any  shares of the  capital  stock of  Parent  or  TowerCo,  or  calling  for or
requiring  the  issuance  of  any  securities  or  rights  convertible  into  or
exchangeable  for shares of capital  stock of Parent,  in any case except as set
forth with respect to Parent in the Parent SEC Reports (as defined herein) or in
Schedule 5.10 hereto.

5.11 Interim Operations of TowerCo. TowerCo was formed solely for the purpose of
engaging in the transactions  contemplated hereby and has not (i) engaged in any
business activities, (ii) conducted any operations other than in connection with
the  transactions  contemplated  hereby or (iii) incurred any liabilities  other
than in  connection  with the  transactions  contemplated  hereby.  TowerCo is a
wholly owned subsidiary of SpectraSite  Communications,  Inc., which is a wholly
owned subsidiary of Parent.

5.12 No Undisclosed  Liabilities.  Except as identified in Schedule 5.12 hereto,
TowerCo has no  liabilities,  outstanding  debt,  or  obligations  of any nature
(whether  known  or  unknown  and  whether  absolute,   accrued,  contingent  or
otherwise) except for liabilities,  outstanding debt or obligations reflected or
reserved  against  in the  financial  statements  of TowerCo as set forth in the
Parent SEC Reports and current  liabilities  incurred in the ordinary  course of
business since the respective dates thereof.

5.13 Pending Transactions.  "Pending Transactions" means Contracts,  agreements,
proposals,  bids,  and other  transactions  in effect as of the date hereof (but
excluding  this  Agreement)  to which  Parent or any of its  direct or  indirect
subsidiaries  have entered into or agreed,  as of the date hereof, to enter into
relating to the acquisition or disposition (by purchase,  sale, merger, lease or
otherwise)  of assets  similar to the Assets.  The  consummation  of the Pending
Transactions,  either individually or in the aggregate,  will not have a TowerCo
Material Adverse Effect.

ARTICLE 6
                                Certain Covenants
6.1  Agreements  of  Sublessors  Pending the  Closing.  AirTouch  and each other
Sublessor  severally  covenants and agrees that,  pending the Final Closing (and
thereafter,  in the case of paragraphs (f) and (g) of this  Section),  except as
otherwise  agreed to in writing by TowerCo,  and except in  connection  with the
performance of the transactions contemplated hereby:

(a) Business in the Ordinary Course. Except as to actions specifically permitted
or  contemplated  by this Agreement or required by any Law, such Sublessor shall
operate,  maintain and service its Assets in the ordinary course consistent with
past practice (including  extensions,
                                      -21-
<PAGE>   27


renewals,  terminations and amendments of Contracts) and in compliance in all
material  respects with all applicable  Laws and, to the extent consistent
therewith,  use reasonable efforts to preserve the goodwill and relationships
with customers,  suppliers and others having business dealings with it that are
material to the Assets.

(b) Update Schedules.  AirTouch and the other Sublessors shall promptly disclose
to TowerCo any information  contained in their  respective  representations  and
warranties or any of the Schedules or Annexes hereto which,  because of an event
occurring after the date hereof, is incomplete or is no longer correct as of all
times after the date hereof until the Final  Closing  Date;  provided,  however,
that none of such disclosures shall be deemed to modify, amend or supplement the
representations  and  warranties  of the  Sublessors or the Schedules or Annexes
hereto for the purposes of Article 8 hereof, unless TowerCo shall have consented
thereto  in  writing,  except (i) to the  extent  that an update  relates to the
addition  to any  Schedule  or  Annex  of  Towers  or Tower  Sites  acquired  or
constructed  after the date of this Agreement in the ordinary course  consistent
with past practice (and Ground Leases  relating to the foregoing) and which meet
the criteria set forth in Schedule 6.1(b)(1),  and matters related thereto, (ii)
to the extent that an update relates to the  expiration or termination  pursuant
to its  terms of a Ground  Lease or Tower  Related  Asset  and  matters  related
thereto,  in which event the applicable  Tower,  Tower Site and Ground Lease (in
the case of an expiring or  terminating  Ground Lease) or the  applicable  Tower
Related Asset (in the case of an expiring or  terminating  Tower Related  Asset)
shall be deemed to be Excluded  Assets for all purposes  hereunder and shall not
be deemed to be the  subject of any  representation,  warranty  or  covenant  of
Sublessors  hereunder,  and  all  references  thereto  in the  Annexes  to  this
Agreement shall be deemed deleted, (iii) to the extent that an update relates to
the renewal (pursuant to preexisting renewal options) of a Ground Lease or Tower
Related Asset,  and matters related  thereto,  (iv) to the extent that an update
relates to the renewal  (other than a renewal  pursuant to  preexisting  renewal
options) or  amendment  of a Ground Lease or Tower  Related  Asset,  and matters
related thereto, so long as the criteria set forth in Schedule 6.1(b)(2) are met
(collectively, the updates referred to in the foregoing clauses (i), (ii), (iii)
and (iv),  together  with any  other  disclosures  consented  to in  writing  by
TowerCo,  the "Permitted  Schedule  Updates").  The Schedules and Annexes hereto
shall be deemed  modified to include the  information in the Permitted  Schedule
Updates.  Notwithstanding  anything  to the  contrary  herein,  if any  proposed
Permitted Schedule Update pursuant to subsection (i) of the foregoing proviso (a
"Subsection  (i)  Update")  contains   exceptions  to  the  representations  and
warranties  contained  in  Articles  3 or 4 hereof  such that the  condition  to
TowerCo's  obligations  to close under Section 8.1(b) would not be satisfied (it
being  understood  that, to the extent that a Subsection  (i) Update revises the
lists of Towers, Tower Sites and certain Contracts called for by Section 3.7 and
the Annexes  hereto,  such revision  shall not  constitute an exception for this
purpose),  TowerCo may, within seven days after the receipt  thereof,  refuse to
accept such proposed  Subsection (i) Update insofar as the exceptions  reflected
therein are  unacceptable to TowerCo,  notify AirTouch of TowerCo's  objections,
and refuse to accept and pay for any such  additional  Towers or Tower  Sites as
are  subject  to such  unacceptable  exceptions.  Each such Tower and Tower Site
(including  the Tower Related Assets  relating  thereto) shall not be subject to
this  Agreement or any of the  Transaction  Documents  for any purpose and shall
constitute  Excluded Assets, and Sublessors may hold, further develop or dispose
of such  Towers,  Tower  Sites and assets  free and clear of any  obligation  or
Liability  arising or imposed  under or pursuant to this  Agreement or the other
Transaction Documents.
                                      -22-
<PAGE>   28


(c) Conduct of Business. Such Sublessor shall cooperate with TowerCo and use its
reasonable  efforts to cause all of the conditions to the obligations of TowerCo
under this Agreement to be satisfied on or prior to the Closing Date.

(d) Sale of Assets;  Negotiations.  Except as permitted by Section  6.1(a) or in
connection with an assignment of this Agreement  permitted by Section 13.2, such
Sublessor  shall not sell or encumber all or any part of its Assets,  other than
Permitted Encumbrances or in the ordinary course of its business consistent with
past  practice  or in  connection  with  the sale or  other  divestiture  of any
cellular  system  owned by any  Sublessor,  or  initiate or  participate  in any
discussions  or  negotiations  or  enter  into  any  agreement  to do any of the
foregoing.  Assets sold or otherwise disposed of in accordance with this Section
shall be deemed to be Excluded  Assets for all purposes  hereunder and shall not
be deemed to be the  subject of any  representation,  warranty  or  covenant  of
Sublessors  hereunder,  and  all  references  thereto  in the  Annexes  to  this
Agreement shall be deemed deleted.

(e) Access. Each Sublessor shall give to TowerCo's officers, employees, counsel,
accountants and other  representatives  free and full access to and the right to
inspect,  during normal business hours and with reasonable prior notice,  all of
the  premises,  properties,  assets,  records,  contracts  and  other  documents
relating  to the Assets and shall  permit  them to  consult  with the  officers,
employees,  accountants  and agents of Sublessors for the purpose of making such
investigation of the Assets as TowerCo shall desire to make,  provided that such
access,  inspection and investigation shall not unreasonably  interfere with the
business operations of Sublessors.  Notwithstanding the foregoing  provisions of
this Section , Sublessors  shall not be required to provide any such information
to TowerCo if, in the  reasonable  determination  of counsel for AirTouch or the
other applicable Sublessor,  access to such information by TowerCo is prohibited
by the provisions of any confidentiality agreements binding upon AirTouch or any
of the other Sublessors or by applicable Law.

(f)  Publicity.  Except as  required by  applicable  Law or in  connection  with
communications  with the other  partners of the Other Entities or the process of
obtaining  consents  contemplated by Section 2.2 hereof, no Sublessor shall give
any  notice  to  third  parties  or  otherwise  make  any  public  statement  or
announcement  (including  statements to any member of the media) concerning this
Agreement or the transactions  contemplated  hereby,  or otherwise make known to
any  third  party  any  information  relating  to this  Agreement  or the  other
Transaction  Documents,  except for such written  information as shall have been
approved in writing as to form and content by TowerCo,  which approval shall not
be unreasonably withheld or delayed.

(g) Cooperation in Accounting  Matters.  If Parent is required by applicable Law
(including the staff of the Securities and Exchange  Commission) to receive from
its independent public accountants an unqualified report (as to the scope of the
audit, access to the books and records and the cooperation of management) on the
Assets  (consisting  of a  balance  sheet  as of the  Final  Closing  Date and a
statement of revenue from third  parties and expenses for the twelve months then
ended,  prepared in conformity with GAAP and Regulation S-X under the Securities
Act of 1933, as amended,  and which shall be at Parent's sole cost and expense),
then Sublessors shall cooperate  reasonably and shall use reasonable  efforts to
cause their  independent  public  accountants  to cooperate  (provided that such
accountants'  cooperation  shall  be at  Parent's  sole

                                      -23-
<PAGE>   29


cost  and  expense)  in responding  to  inquiries  from  Parent's   independent
public accountants in connection with their production of such report for
Parent.

6.2 Agreements of TowerCo. Each of Parent and TowerCo covenants and agrees that,
pending the Final Closing (and thereafter, in the case of paragraphs (d) and (e)
of this Section 6.2) and except as otherwise agreed to in writing by AirTouch:

(a) Update Schedules. Parent and TowerCo shall promptly disclose to AirTouch (on
behalf of the Sublessors) any information  contained in the  representations and
warranties of Parent or TowerCo or any of the Schedules hereto which, because of
an event occurring after the date hereof,  is incomplete or is no longer correct
as of all times after the date hereof until the Final  Closing  Date;  provided,
however,  that none of such  disclosures  shall be deemed  to  modify,  amend or
supplement  the  representations  and  warranties  of Parent or  TowerCo  or the
schedules  hereto for the purposes of Article 9 hereof,  unless  AirTouch  shall
have consented thereto in writing.

(b)  Conduct  of  Business.  Each of Parent and  TowerCo  shall  cooperate  with
Sublessors and use its reasonable  efforts to cause all of the conditions to the
obligations  of Sublessors and the TowerCo  Parties under this Agreement  (other
than the conditions in Section  9.1(f)(i) and 9.1(f)(v)  hereof) to be satisfied
on or prior to each Closing Date.

(c) Access.  Pending the Final Closing, each of Parent and TowerCo shall give to
Sublessors' officers,  employees, counsel, accountants and other representatives
free and full access to and the right to inspect,  during normal business hours,
all of the premises,  properties, assets, records, contracts and other documents
relating to its business  and shall  permit them to consult  with the  officers,
employees, accountants, counsel and agents of Parent and TowerCo for the purpose
of making such  investigation  of their  business and the  properties and assets
used in connection therewith,  as Sublessors shall desire to make, provided that
such investigation shall not unreasonably interfere with the business operations
of Parent and TowerCo.  Notwithstanding the foregoing provisions of this Section
6.2(c), Parent and TowerCo shall not be required to provide any such information
to Sublessors  if, in the  reasonable  determination  of the general  counsel of
Parent, access to such information by Sublessors is prohibited by the provisions
of  any  confidentiality  agreement  binding  upon  Parent  and  TowerCo  or  by
applicable Law.

(d) Publicity.  Except as required by applicable Law, neither Parent nor TowerCo
shall give notice to third  parties or  otherwise  make any public  statement or
announcement  (including  statements to any member of the media) concerning this
Agreement or the transactions contemplated hereby or otherwise make known to any
third party any information  relating to this Agreement or the other Transaction
Documents,  except for such written  information  as shall have been approved in
writing  as to form  and  content  by  AirTouch,  which  approval  shall  not be
unreasonably withheld or delayed.

(e) Other Covenants. From the date of this Agreement until the first anniversary
of the Final  Closing,  neither  Parent nor TowerCo nor any of their  respective
Affiliates  will Solicit any employee of any Sublessor or any of its  Affiliates
to leave  his or her  employment  with such  Sublessor  or its  Affiliates.  For
purposes  of  this  Agreement,  "Solicit"  means  any  recruitment  specifically
directed  at one or more  individuals  identified  by name,  title or  Sublessor
affiliation
                                      -24-
<PAGE>   30

(i.e.,  beyond  generally  advertising job openings),  but the term "Solicit"
shall  not  include  any  activities  that  constitute  follow-up  to
individuals who respond to general job opening advertisements or who voluntarily
initiate employment inquiries.

6.3      Additional Agreements of Sublessors and TowerCo Parties.

(a)      Regulatory Matters.

(i)      Each party  hereto  agrees to use  commercially  reasonable  efforts to
         comply with all Laws which may be imposed on such party with respect to
         the   transactions   contemplated  by  this  Agreement  and  the  other
         Transaction Documents.

(ii)     Notwithstanding anything else to the contrary contained in this
         Agreement, none of AirTouch nor any other Sublessor shall have any
         obligation to oppose, challenge or appeal any suit, action or
         proceeding by any Governmental Authority before any court or other
         Governmental Authority, domestic or foreign, or any order or ruling by
         any such body (A) seeking to restrain or prohibit or restraining or
         prohibiting the consummation of the transactions contemplated by the
         Transaction Documents, (B) seeking to prohibit or limit or prohibiting
         or limiting the leasing, subleasing, occupancy, operation or control by
         any TowerCo Party of the Subleased Property or Managed Components (as
         defined in the Sublease) or (C) seeking to compel or compelling any
         TowerCo Party or any Sublessor or any of their respective Affiliates to
         dispose of, grant rights in respect of, or hold separate any portion of
         the business or assets of any TowerCo Party or any Sublessor or any of
         their respective Affiliates.

(b)  Cooperation  in Tax Matters.  Sublessors,  on the one hand, and the TowerCo
Parties,  on the  other  hand,  shall  cooperate  fully  as  and  to the  extent
reasonably requested by the other party in connection with any audit, litigation
or other proceeding with respect to Taxes.  Such  cooperation  shall include the
retention  and (upon the other  party's  request)  the  provision of records and
information which are reasonably relevant to any such audit, litigation or other
proceeding  and making  employees  available on a mutually  convenient  basis to
provide  additional   information  and  explanation  of  any  material  provided
hereunder.  Sublessors and the TowerCo Parties agree (i) to retain all books and
records  with  respect to Tax matters  pertinent  to the Assets  relating to all
taxable  periods until the statute of limitations  (including any extensions) as
to any taxable year that may be affected  thereby  shall have run, (ii) to abide
by all record retention agreements entered into with any Governmental Authority,
and (iii) to give the other party reasonable  written notice prior to destroying
or  discarding  any such books and records and, if one party so requests,  shall
allow the requesting party to take possession of such books and records proposed
for destruction or discard (at the requesting party's sole expense).

(c) Transfer Taxes. Each Sublessor shall pay and promptly discharge when due the
entire  amount of any and all state and local sales and use,  documentary,  real
property  transfer and other transfer  taxes,  similar taxes and related amounts
(including any penalties,  interest and additions to Tax) (the "Transfer Taxes")
imposed or levied by reason of the execution and  performance  of this Agreement
and the Sublease,  if any.  TowerCo shall promptly  reimburse each Sublessor for
50% of all such  Transfer  Taxes upon  receipt of  suitable  evidence  that such
Transfer  Taxes have been paid by such  Sublessor.  The parties  will  cooperate
before and after
                                      -25-
<PAGE>   31


each Closing to minimize  Transfer Taxes. Such cooperation will include the
provision of resale  certificates,  other  exemption  certifications where
appropriate,  or other documentation  reasonably  requested by AirTouch or
another Sublessor.

(d) Further Assurances. Each of the parties hereto will cooperate with the other
and execute and deliver to the other parties hereto such other  instruments  and
documents and take such other actions as may be reasonably  requested  from time
to time by any other  party  hereto as  necessary  to carry  out,  evidence  and
confirm the intended purposes of this Agreement.

(e) Tax Filings.  TowerCo will be  responsible  for filing before and after each
Closing any forms,  notices or other  filings as  required by each  Governmental
Authority  necessary  to  identify  the  change in  ownership,  use,  control or
possession of the Assets.

(f)      Specified Sites.  The parties confirm the agreements stated in the last
two sentences of Item 1 of Schedule 3.9.
         ---------------

6.4  Confidentiality.  All information  obtained by any party in connection with
this Agreement shall be kept confidential in accordance with that certain letter
agreement dated December 1, 1999 between  SpectraSite  Communications,  Inc. and
Lehman Brothers Inc. on behalf of AirTouch.  TowerCo and Parent agree to observe
and abide by the covenants of  SpectraSite  Communications,  Inc. in such letter
agreement.  The  obligations  in this Section shall survive any  termination  or
expiration of this Agreement.

ARTICLE 7
                           Optional TowerCo Activities
7.1  Preliminary  Title Reports.  TowerCo may, but shall not be obligated to, at
its own cost or expense,  obtain as promptly as practicable  after the execution
of this  Agreement  either (i) a standard  preliminary  title report dated on or
after the date of this  Agreement  with respect to each parcel of real  property
constituting a part of the Assets, or (ii) copies of title policies or marked up
commitments to issue title policies, with policies to be provided when issued.

7.2 Environmental Site Assessments. TowerCo may as promptly as practicable after
the execution of this Agreement, at its own cost and expense, obtain and deliver
to the applicable  Sublessor full and complete copies of a Phase I Environmental
Report on each  parcel of real  property  constituting  a part of the Assets for
which a Phase I  Environmental  Report  has not  heretofore  been  delivered  to
TowerCo (or as to which TowerCo has heretofore indicated that the existing Phase
I Environmental  Report raises questions of potential  liability that has had or
could be  reasonably  expected  to  materially  impair  the  value or use of the
affected real property). Site assessments shall be conducted by such consultants
and professionals as TowerCo shall select and as shall be reasonably  acceptable
to AirTouch and shall be arranged at times  mutually  convenient to the parties.
Each  of the  applicable  Sublessor  and  TowerCo  shall  be  entitled  to  have
representatives  present at the time such site  assessments are conducted and to
have  copies  of all  correspondence  with the  entity  preparing  such  Phase I
Environmental Reports.
                                      -26-
<PAGE>   32

7.3 Structural  Reports.  TowerCo may, but shall not be obligated to, at its own
cost and expense,  obtain as promptly as practicable after the execution of this
Agreement, a report with respect to each of the components of the Towers of such
structural  engineers as are reasonably  satisfactory to TowerCo with respect to
(i) the  structural  soundness  and  operating  condition  of the  Towers,  (ii)
compliance  of the Towers with all  applicable  Laws,  Governmental  Permits and
Contracts, and (iii) any required structural or other material repairs.

ARTICLE 8
                 Conditions Precedent to Obligations of TowerCo
8.1  Conditions  Precedent.   The  obligations  of  TowerCo  to  consummate  the
transactions  contemplated on each Closing Date are subject to the satisfaction,
on or before such Closing Date, of all the following conditions:

(a) Sublessors  shall have performed and complied in all material  respects with
all  covenants  and  obligations  required  by  this  Agreement  and  the  other
Transaction  Documents  to be  performed or complied  with by  Sublessors  on or
before such Closing Date.

(b) All  representations and warranties of Sublessors in this Agreement shall be
true,  correct and complete,  in each case on and as though made on such Closing
Date (except for  representations and warranties with respect to matters as of a
specified  date or for a  specified  period,  which  shall be true,  correct and
complete as of such date or with respect to such  period),  in each case without
regard to any schedule updates (other than Permitted Schedule Updates) furnished
by  Sublessors  after the date hereof,  except to the extent that the failure of
such  representations and warranties to be true and correct,  individually or in
the  aggregate,  do not have an  AirTouch  Material  Adverse  Effect;  provided,
however,  that  solely for the  purpose of the  foregoing,  representations  and
warranties  that are qualified as to  materiality  (including by reference to an
AirTouch  Material  Adverse  Effect)  shall not be  deemed  to be so  qualified;
provided,  however, that for purposes of this Section 8.1 each representation or
warranty  (other than those in Sections  3.1, 3.2, 3.3 or 3.10) of any Sublessor
that  refers  to or is  made  with  respect  to any or  all  of  the  Assets  or
liabilities  (including  without  limitation  Contracts,  Governmental  Permits,
Encumbrances,  Towers, Tower Sites and Real Property) of or affecting any or all
Sublessors or their  properties shall be deemed to refer only to such Assets and
liabilities  which are the subject of the Closing at issue, and not to any other
Assets or liabilities of or affecting any Sublessor or its properties.

(c) As of  such  Closing  Date,  no  lawsuit,  action  or  proceeding  shall  be
completed, pending or threatened against TowerCo or any Sublessor that has or is
likely to result in a  judgment,  decree or order  that  would  prevent  or make
unlawful the consummation of the transactions contemplated by this Agreement and
there shall be in effect no injunction or order  restraining or prohibiting  the
consummation of the transactions contemplated by this Agreement to occur at such
Closing nor any proceedings pending with respect thereto.

(d)  Sublessors  shall  have  duly  tendered  to  TowerCo  all  documents  which
Sublessors  are  required  by Section  10.2(b)  to  deliver to TowerCo  for such
Closing.
                                      -27-
<PAGE>   33


(e)  Sublessors  shall have been able to deliver to TowerCo at least the minimum
number of Included  Towers  applicable to such  Closing,  as provided in Section
2.4.

(f) All authorizations,  consents,  waivers,  orders or approvals required to be
obtained  from  all  Governmental  Authorities,  and all  filings,  submissions,
registrations, notices or declarations required to be made by any of the parties
with  any  Governmental   Authority,   in  connection  with  and  prior  to  the
consummation of the transactions  contemplated  hereby to occur at such Closing,
shall have been obtained from, and made with, all such Governmental Authorities,
except for such authorizations,  consents, waivers, orders, approvals,  filings,
registrations,  notices or  declarations  the failure of which to obtain or make
would not have an AirTouch Material Adverse Effect.

(g) All agreements,  certificates  and other documents  required to be delivered
pursuant to the provisions of this Agreement  (other than the other  Transaction
Documents to the extent  substantially  in the form  attached  hereto)  shall be
reasonably satisfactory in form, scope and substance to TowerCo and its counsel,
and  TowerCo  and its  counsel  shall  have  received  copies of all  documents,
including records of corporate proceedings, which they may reasonably request in
connection therewith, such documents where appropriate to be certified by proper
Governmental Authorities or corporate officers.

(h) With respect to any  Subsequent  Closing,  the Sublease  shall not have been
terminated in accordance with its terms.

8.2 Waiver.  TowerCo may waive any or all of the conditions set forth in Section
8.1 hereof in whole or in part;  however,  no such waiver of a  condition  shall
constitute a waiver by TowerCo of any of its other rights or remedies under this
Agreement or otherwise at law or in equity if Sublessors should be in default of
any of the covenants,  agreements,  representations  or warranties of Sublessors
under this Agreement.

ARTICLE 9
                Conditions Precedent to Obligations of Sublessors
9.1  Conditions  Precedent.  The  obligations  of Sublessors  to consummate  the
transactions  contemplated on each Closing Date are subject to the satisfaction,
on or before such Closing Date, of all the following conditions:

(a) Each of the  TowerCo  Parties  shall  have  performed  and  complied  in all
material respects with all covenants and obligations  required by this Agreement
and the other  Transaction  Documents to be  performed or complied  with by such
TowerCo Party on or before such Closing Date.

(b) All  representations  and  warranties  made by Parent  and  TowerCo  in this
Agreement  shall be true,  correct and  complete,  in each case on and as though
made on such  Closing  Date  (except for  representations  and  warranties  with
respect to matters as of a specified date or for a specified period, which shall
be true,  correct and complete as of such date or with respect to such  period),
in each case  without  regard to any  schedule  updates  furnished  by Parent

                                      -28-
<PAGE>   34

or TowerCo after the date hereof, except to the extent  that the failure of such
representations  and warranties to be true and correct,  individually  or in the
aggregate,  do not have a TowerCo  Material Adverse Effect;  provided,  however,
that solely for the purpose of the  foregoing,  representations  and  warranties
that are  qualified  as to  materiality  (including  by  reference  to a TowerCo
Material Adverse Effect) shall not be deemed to be so qualified.

(c) As of  such  Closing  Date,  no  lawsuit,  action  or  proceeding  shall  be
completed,  pending or  threatened  against any  Sublessor or any of the TowerCo
Parties  that has or is likely to result  in a  judgment,  decree or order  that
would prevent or make unlawful the consummation of the transactions contemplated
by  this  Agreement  and  there  shall  be in  effect  no  injunction  or  order
restraining or prohibiting the consummation of the transactions  contemplated by
this Agreement to occur at such Closing nor any proceedings pending with respect
thereto.

(d) TowerCo shall have duly tendered to each Sublessor the applicable  Exclusive
Commitment  Fee for such Closing and all documents  which TowerCo and Parent are
required by Section 10.2 to deliver to one or more Sublessors at such Closing.

(e) With respect to any  Subsequent  Closing,  the Sublease  shall not have been
terminated in accordance with its terms.

(f)  Neither  TowerCo  nor  Parent  shall  have (i) been a party to any  merger,
consolidation  or other  business  combination in which it was not the surviving
corporation  or  in  which  Parent's  common   stockholders   (as  in  existence
immediately  prior to such  transaction)  do not  possess at least  50.1% of the
voting power of the Person  controlling  the  surviving  corporation,  (ii) been
liquidated,  wound up or  dissolved,  or made an  assignment  for the benefit of
creditors,  or filed a  bankruptcy  petition,  or  petitioned  or applied to any
Governmental  Authority  or  other  tribunal  seeking  a  receiver,  trustee  or
custodian, or instituted or commenced any voluntary proceeding or become subject
to (or indicated its consent to, approval of or acquiescence in) any involuntary
proceeding contemplating or seeking any of the foregoing or any proceeding under
any bankruptcy, reorganization, readjustment of debt, dissolution or liquidation
Law of any  jurisdiction,  (iii)  become  insolvent  as defined  in the  Uniform
Commercial  Code  under  the  Laws  applicable  to this  Agreement,  (iv)  sold,
assigned,  leased or otherwise  disposed of (whether in one  transaction or in a
series of  transactions)  all or  substantially  all of its assets  (whether now
owned or hereinafter  acquired)  unless it meets the voting power test described
in clause  (i) with  respect  to the  Person to which  such  assets  were  sold,
assigned,  leased or  otherwise  disposed of, (v) effected or agreed to effect a
Significant Transaction,  or (vi) entered into any Contract or arrangement to do
or permit any of the foregoing.

(g) All authorizations,  consents,  waivers,  orders or approvals required to be
obtained  from  all  Governmental  Authorities,  and all  filings,  submissions,
registrations, notices or declarations required to be made by any of the parties
with any Governmental  Authority,  prior to the consummation of the transactions
contemplated hereby to occur at such Closing, shall have been obtained from, and
made with, all such Governmental  Authorities,  except for such  authorizations,
consents,  waivers,  orders,  approvals,  filings,  registrations,   notices  or
declarations  the  failure of which to obtain or make would not have an AirTouch
Material Adverse Effect.

                                      -29-
<PAGE>   35

(h) All agreements,  certificates,  opinions and other documents  required to be
delivered  pursuant to the  provisions of this  Agreement  (other than the other
Transaction  Documents to the extent  substantially in the form attached hereto)
shall be reasonably  satisfactory in form, scope and substance to Sublessors and
their counsel,  and  Sublessors and their counsel shall have received  copies of
all  documents,  including  records  of  corporate  proceedings,  which they may
reasonably request in connection therewith,  such documents where appropriate to
be certified by proper Governmental Authorities or corporate officers.

(i) All authorizations,  consents,  waivers, orders or approvals required by the
provisions  of this  Agreement  to be  obtained  from all  Persons  (other  than
Governmental   Authorities)  prior  to  the  consummation  of  the  transactions
contemplated  on such  Closing  Date  shall  have  been  obtained,  without  the
imposition,  individually  or in the aggregate,  of any condition or requirement
that has had or would have an AirTouch Material Adverse Effect.

9.2  Waiver.  Sublessors  may waive any or all of such  conditions  set forth in
Section 9.1 hereof in whole or in part;  however,  no such waiver of a condition
shall constitute a waiver by Sublessors of any of their other rights or remedies
under  this  Agreement  or  otherwise  at law or in equity if  TowerCo or Parent
should be in default of any of the  covenants,  agreements,  representations  or
warranties made by TowerCo or Parent under this Agreement.

ARTICLE 10
                                     Closing
10.1 Closing. Each Closing shall take place on the Closing Date and at the place
provided for in Section 2.4. At the applicable Closing, and subject to the terms
and conditions herein contained,  each of the parties shall take all actions and
deliver all documents, instruments,  certificates, agreements and other items as
required  under this  Agreement  in order to  perform,  fulfill  and observe all
covenants,  conditions and agreements on its part to be performed, fulfilled and
observed at or prior to such Closing Date (and not theretofore accomplished).

10.2     Closing Deliveries.

(a)      At the Initial Closing, and subject to the terms and conditions herein
         contained:

(i)      AirTouch (for itself and the other Sublessors), TowerCo and Parent
         shall execute and deliver the Sublease;

(ii)     AirTouch  (for  itself  and the other  Sublessors)  shall  execute  and
         deliver,  and TowerCo and Parent  shall  execute and  deliver,  (A) the
         Master  Tower  Site  Lease  Agreement  in the form  attached  hereto as
         Exhibit C (the "Master Lease") pursuant to which TowerCo shall lease to
         Sublessors  space on certain  communications  towers to be  constructed
         pursuant to the Build-to-Suit Agreement (as defined below); and (B) the
         Site  Development  and  Build-to-Suit  Agreement  in the form  attached
         hereto as Exhibit D (the "Build-to-Suit  Agreement")  pursuant to which
         Sublessors  shall offer to TowerCo from time to time the right to build
         certain  towers  and  related  structures  on the terms and  conditions
         described therein.
                                      -30-
<PAGE>   36



(b) At each Closing  (including the Initial  Closing),  and subject to the terms
and conditions herein contained,  Sublessors shall deliver to TowerCo all of the
following:

(i)      the  Site   Designation   Supplements  (as  defined  in  the  Sublease)
         applicable to the Tower Sites which are the subject of such Closing, to
         the extent and as provided in this Agreement;

(ii)     a certificate of each Sublessor, substantially in the form of Exhibit E

(iii)    a Certificate of Good Standing for each  Sublessor  certified to by the
         Secretary   of  State   of  the   jurisdiction   of  such   Sublessor's
         incorporation or formation; and

(iv) such other documents and certificates as TowerCo may reasonably request.

(c) At each Closing  (including the Initial  Closing),  TowerCo and Parent shall
deliver to Sublessors the following:

(i)      a wire  transfer  to each  Sublessor  of the  portion of the  Exclusive
         Commitment  Fee  attributable  (on a pro rata  basis)  to the  Included
         Towers  of such  Sublessor  which  are  the  subject  of such  Closing,
         pursuant to instructions received from AirTouch;

(ii)     a Certificate  of Good  Standing of TowerCo and Parent  certified to by
         the  Secretary  of State of each  State in which any of the  Towers and
         Tower Sites that are the subject of such Closing are located;

(iii)    an executed counterpart of each Site Designation Supplement delivered
by Sublessors pursuant to Section 10.2(b) hereof;

(iv) a certificate of each of Parent and TowerCo, each substantially in the form
of Exhibit F; and

(v) such other documents and certificates as Sublessors may reasonably request.

ARTICLE 11
                                 Indemnification
11.1     Indemnification by Sublessors.

(a) Each Sublessor agrees severally,  and for its own account only, to indemnify
TowerCo,  its  Affiliates,  and the directors,  partners,  officers,  agents and
employees of TowerCo and each of its Affiliates (collectively,  the "Indemnified
TowerCo  Parties")  and hold it harmless on an after-Tax  basis from any and all
losses, liabilities,  claims, suits, proceedings,  demands, judgments,  damages,
expenses   and  costs,   including,   without   limitation,   counsel  fees  and

                                      -31-
<PAGE>   37


disbursements, expert fees and costs and expenses incurred in the investigation,
defense or settlement of any claims  covered by this  indemnity  ("Indemnifiable
Damages") which any  Indemnified  TowerCo Party may suffer or incur by reason of
(i) the inaccuracy of any representation or warranty of such Sublessor contained
in this Agreement (but excluding any other Transaction  Documents),  or (ii) the
breach by such  Sublessor  of any  covenant  made by it in this  Agreement  (but
excluding  any  other  Transaction  Documents).   The  foregoing  obligation  of
Sublessors  shall be subject to and  limited by each of the  qualifications  set
forth in this Article 11.

(b) Except with  respect to bona fide and valid claims for which notice has been
given within the Indemnity Period,  each  representation,  warranty and covenant
made by  Sublessors  in this  Agreement  or  pursuant  hereto and the  indemnity
obligations  set  forth in this  Section  11.1  shall  survive  only  until  the
expiration of the Indemnity  Period,  and thereafter  all such  representations,
warranties and covenants and indemnity  obligations and any liability thereunder
shall be  extinguished  and of no further force or effect.  The term  "Indemnity
Period" means a period of twelve (12) months after the  applicable  Closing Date
with respect to  representations  and warranties  and the applicable  statute of
limitations with respect to the covenants and agreements of the parties.

(c) The indemnity obligations of each Sublessor hereunder shall not apply (i) to
the  extent  that  TowerCo  is  compensated  for the same loss  under  TowerCo's
insurance  policies in the absence of any  indemnity  hereunder  if the insurers
under such policy waive their rights of  subrogation  with respect  thereto;  or
(ii) if the damages to TowerCo do not exceed the Threshold Amount  applicable to
such Sublessor.  If such damages exceed the Threshold Amount  applicable to such
Sublessor,  the indemnity  obligations  of such Sublessor  hereunder  shall only
apply to that portion of the  Indemnifiable  Damages that exceeds the  Threshold
Amount for such Sublessor and thereafter  Indemnifiable Damages shall be paid up
to the Maximum  Amount  calculated  on a  cumulative  basis with  respect to all
Sublessors  taken in the  aggregate.  For  purposes of  determining  whether the
Threshold  Amount or Maximum  Amount  (as the case may be) for any Wholly  Owned
Entity has been reached,  all Sublessors that are Wholly Owned Entities shall be
treated as a single  "Sublessor,"  and the Threshold  Amount and Maximum  Amount
shall be  calculated  on a  cumulative  basis with  respect to all Wholly  Owned
Entities.

11.2     Indemnification by TowerCo.

(a)  TowerCo  agrees  to  indemnify  each  Sublessor,  its  Affiliates,  and the
directors,  partners,  agents and employees of each Sublessor and its Affiliates
(collectively,  the "Indemnified  Sublessor  Parties")  against and hold each of
them harmless on an after-Tax basis from any and all Indemnifiable Damages which
any such  Indemnified  Sublessor  Party  may  suffer or incur by reason of or in
connection with (i) the inaccuracy of any  representation  or warranty of Parent
or TowerCo  contained in this  Agreement  (but  excluding any other  Transaction
Document), or (ii) the breach by Parent or TowerCo of any covenant made by it in
this  Agreement (but excluding any other  Transaction  Document).  The foregoing
obligation  of  TowerCo  shall  be  subject  to  and  limited  by  each  of  the
qualifications set forth in this Article 11.

(b) Except with  respect to bona fide and valid claims for which notice has been
given within six (6) months of the Closing Date, each  representation,  warranty
and  covenant  made by Parent or TowerCo in this  Agreement  or pursuant  hereto
(other  than those which by their  terms
                                      -32-
<PAGE>   38


survive  for a longer  period) and the indemnity  obligations  set forth in this
Section 11.2 shall  survive only until the date which is six (6) months
following the Closing Date, and thereafter all such representations, warranties,
covenants and indemnity obligations and any liability thereunder shall be
extinguished and of no further force or effect.

(c) The indemnity  obligations of TowerCo  hereunder  shall not apply (i) to the
extent  that  Sublessors  are  compensated  for the same loss under  Sublessors'
insurance  policies in the absence of any  indemnity  hereunder  if the insurers
under such policy waive their rights of  subrogation  with respect  thereto;  or
(ii) if the damages to Sublessors do not exceed the Threshold Amount  applicable
to TowerCo.  If such damages exceed the Threshold Amount  applicable to TowerCo,
the indemnity  obligations of TowerCo hereunder shall only apply to that portion
of the  Indemnifiable  Damages that exceeds the Threshold Amount for TowerCo and
thereafter Indemnifiable Damages shall be paid up to the Maximum Amount.

11.3     Notice and Right To Defend Third-Party Claims.

(a) Upon receipt of written  notice of any claim,  demand or assessment  from or
the commencement of any suit, arbitration, action or proceeding by a third party
(a  "Claim")  in  respect  of which  indemnity  may be sought on  account  of an
indemnity agreement contained in this Article, the party seeking indemnification
(the  "Indemnitee")  shall  promptly,  but in no event later than  fifteen  (15)
Business  Days prior to the date a response  or answer  thereto is due (unless a
response or answer is due within fewer than fifteen (15)  Business Days from the
date of Indemnitee's  receipt of notice thereof),  inform the party against whom
indemnification  is sought (the  "Indemnitor") in writing thereof.  The failure,
refusal or neglect of such  Indemnitee to notify the Indemnitor  within the time
period  specified above of any such Claim shall relieve such Indemnitor from any
liability which it may have to such Indemnitee in connection  therewith,  if the
effect of such failure, refusal or neglect is to prejudice materially the rights
of the Indemnitor in defending against the Claim.

(b) In case any Claim shall be asserted or commenced against an Indemnitee,  and
such  Indemnitee  shall have timely and properly  notified the Indemnitor of the
commencement  thereof,  the  Indemnitor  shall  assume the  defense,  conduct or
settlement thereof, with counsel selected by the Indemnitor. After assumption of
the defense, conduct or settlement thereof, the Indemnitor will not be liable to
the  Indemnitee  for expenses  incurred by  Indemnitee  in  connection  with the
defense,  conduct or  settlement  thereof,  except for such  expenses  as may be
reasonably required to enable the Indemnitor to take over such defense,  conduct
or settlement.

(c) The  Indemnitee  will at its own expense  cooperate  with the  Indemnitor in
connection  with any such Claim,  make personnel,  witnesses,  books and records
relevant to the Claim  available to the  Indemnitor  at no cost,  and grant such
authorizations or powers of attorney to the agents,  representatives and counsel
of the Indemnitor as the Indemnitor  may reasonably  request in connection  with
the defense or settlement of any such Claim.

(d)  Notwithstanding  the foregoing in this Section 11.3, the  Indemnitee  shall
have the right to employ  separate  counsel in any such Claim and to participate
in the defense  thereof,  but the fees and expenses of such counsel shall be its
fees and  expenses  unless  (i) the  Indemnitor  has agreed to pay such fees and
expenses,  (ii) the Indemnitor has failed to assume the defense of

                                      -33-
<PAGE>   39

such Claim or (iii) the named  parties to any such Claim  (including  any
impleaded  parties) include both the  Indemnitor  and the  Indemnitee  and the
Indemnitee  has been advised by counsel that there may be one or more legal
defenses  available to it which are different from or additional to those
available to the Indemnitor (in which case, if the  Indemnitee  informs the
Indemnitor in writing that it elects to employ  separate  counsel at the expense
of the  Indemnitor,  the  Indemnitor shall not have the right to assume the
defense of such Claim or  proceeding  on behalf of the  Indemnitee,  it being
understood,  however,  that the Indemnitor shall not, in connection with any one
such Claim or separate but  substantially similar  or  related  Claims in the
same  jurisdiction  arising  out of the same general  allegations or
circumstances,  be liable for the  reasonable  fees and expenses  of more  than
one  separate  firm of  attorneys  at any  time for the Indemnitee, which firm
shall be designated in writing by the Indemnitee).

11.4 Notice and Right to Remediate.  Notwithstanding  anything in this Agreement
to  the  contrary,   Sublessors  shall  have  no  obligation  to  indemnify  any
Indemnified  TowerCo Party with respect to  Indemnifiable  Damages arising under
Environmental Laws or out of any Environmental  Condition,  including damages or
other Liabilities due to any necessary investigation,  remediation or cleanup of
Hazardous Substances at the Real Property, unless TowerCo first gives Sublessors
an option to conduct any  necessary  response or perform any  required  work and
Sublessors  refuse to do so. Such an option should be given to  Sublessors  with
the written notice required by Section 11.3(a),  but in any case, shall be given
in  writing  prior to any  expenditure  or  commitment  by TowerCo or any of its
Affiliates  or  agents  of or for what  TowerCo  considers  to be  Indemnifiable
Damages.  Sublessors  shall respond to the option in writing  within thirty (30)
calendar  days of receipt  of  TowerCo's  notice of the  option or such  shorter
period as is required to enable TowerCo to comply with all Environmental Laws or
Governmental Permits or to meet the requirements of the appropriate Governmental
Authority.  If Sublessors  exercise their option,  Sublessors  shall perform all
work  in a  workmanlike  manner  in  material  compliance  with  all  applicable
Environmental and other Laws and Governmental Permits to the satisfaction of the
appropriate Governmental Authority. In addition,  Sublessors will afford TowerCo
a reasonable  opportunity  to comment (at TowerCo's  sole expense) in advance of
Sublessors'  proposed  responses or submissions to  Governmental  Authorities or
third parties relating to activities on the Real Property, including reports and
workplans,  provided  that such  comment  period  does not  materially  delay or
interfere  with  Sublessors'  obligations to any third party.  Sublessors  shall
consider TowerCo's comments in good faith, but are under no obligation to accept
or incorporate  TowerCo's comments.  Except to the extent required by applicable
Law,  TowerCo  and  its   representatives  and  agents  will  not  initiate  any
communication or make comments or submissions to any  Governmental  Authority or
third parties with respect to  environmental  conditions as to which  Sublessors
have exercised their option. Any conflicts between Section 11.3 and this Section
11.4 shall be resolved in favor of this Section 11.4.

11.5  Mitigation.  Nothing herein contained shall affect a party's legal duty to
mitigate damages.

11.6 Exclusive Remedy.  Notwithstanding  anything to the contrary herein, except
as provided in Sections  12.3 and 13.18,  this  Article 11 shall be the sole and
exclusive  basis of any remedy that each party may have  against the other party
for an  inaccuracy or breach of a  representation,  warranty or covenant in this
Agreement  and each party hereby waives any claim (other than under this Article
11) that it may have against the other party with respect to the

                                      -34-
<PAGE>   40


inaccuracy  or breach  of  any  such  representation,  warranty  or  covenant.
Notwithstanding anything to the  contrary in the other  Transaction  Documents,
this Article 11 shall be the sole and exclusive basis of any remedy that Parent,
TowerCo and the Indemnified  TowerCo  Parties may have  against  Sublessors with
respect to any Excluded Claim (as defined in the Sublease).

11.7 Effect of Investigation or Knowledge.  Except as otherwise provided herein,
all covenants, agreements,  representations and warranties made herein or in any
agreement,  instrument or certificate delivered pursuant to this Agreement shall
not be deemed to be waived or  otherwise  affected by any  investigation  at any
time  made by or on  behalf  of any  party  hereto.  No claim  for a  breach  of
representation or warranty shall be made by any Indemnified  TowerCo Party under
Section 11.1(a) or any Indemnified Sublessor Party under Section 11.2(a), if (i)
such claim is based on an Event occurring  prior to the Closing  (whether or not
also occurring prior to the date of this Agreement),  (ii) either (a) such Event
was disclosed by Sublessors or TowerCo, as the case may be, prior to the Closing
in a writing which  describes  such Event in reasonable  detail or (b) a TowerCo
Party or  AirTouch,  as the case may be, had actual  knowledge  of such Event or
such misrepresentation or breach of warranty prior to the Closing, and (iii) the
Closing occurs.

11.8 Limitation of Liability.  Notwithstanding  anything to the contrary herein,
in no event shall any Indemnified Sublessor Party on the one hand, or TowerCo on
the other hand, be liable to the other party hereto for any special, incidental,
punitive  or  consequential  damages  incurred  by such  party and  caused by or
arising out of any breach of any representation, warranty, covenant or agreement
contained in this Agreement  (including claims of lost profits,  lost revenue or
loss of use of facilities or assets),  regardless of whether such party has been
informed of the possibility of such damages.

ARTICLE 12
                                   Termination
12.1 Termination  Events.  This Agreement may be terminated and the transactions
contemplated hereby may be abandoned:

(a)      at any time, by the mutual agreement of TowerCo and AirTouch; or

(b) by either TowerCo or AirTouch,  upon written notice to the other,  if all of
the conditions to TowerCo's or Sublessors'  obligations  (as the case may be) to
consummate the Initial Closing set forth in Sections 8.1 and 9.1,  respectively,
shall  not have been  satisfied  or waived  on or  before  the  Initial  Closing
Expiration  Date  for  any  reason  other  than a  breach  or  default  by  such
terminating  party of its  respective  representations,  warranties,  covenants,
agreements  or other  obligations  hereunder  such  that the  conditions  to the
non-terminating  party's obligations to consummate the Initial Closing set forth
in Section 9.1(a) or 9.1(b), or in Section 8.1(a) or 8.1(b), as the case may be,
would not be satisfied; or

(c) by AirTouch  at any time prior to any Closing if (i) it has not  breached or
defaulted  under  any of its  representations,  warranties,  covenants  or other
obligations  hereunder  such that
                                      -35-
<PAGE>   41


the  conditions  as to such  Closing set forth either in Section  8.1(a) or
Section  8.1(b)  would not be  satisfied,  and (ii) Parent or TowerCo shall have
breached or defaulted  under any of its  respective representations, warranties,
covenants  or  other   obligations  under  this Agreement,  such that the
conditions  as to such  Closing  set forth  either in Section  9.1(a) or Section
9.1(b)  would not be  satisfied,  and such breach or default is either incapable
of cure or, if capable of cure, shall not have been cured within  thirty (30)
calendar days (or such longer period not exceeding 60 calendar days so long as
the applicable  TowerCo Party is proceeding  diligently and in good faith to
cure) after written notice thereof; or

(d) by TowerCo at any time prior to any  Closing if (i) it has not  breached  or
defaulted  under  any of its  representations,  warranties,  covenants  or other
obligations  hereunder  such that the  conditions  as to such  Closing set forth
either in Section  9.1(a) or Section  9.1(b)  would not be  satisfied,  and (ii)
Sublessors shall have breached or defaulted under any of their  representations,
warranties,  covenants or other obligations under this Agreement,  such that the
conditions  as to such  Closing  set forth in either  Section  8.1(a) or Section
8.1(b) would not be satisfied, and such breach or default is either incapable of
cure or, if  capable  of cure,  shall not have been  cured  within  thirty  (30)
calendar  days (or such longer  period not exceeding 60 calendar days so long as
Sublessors  are  proceeding  diligently and in good faith to cure) after written
notice thereof; or

(e) by either  TowerCo  or  AirTouch,  in the event that all  Closings  have not
occurred on or before the date six months  following the Initial Closing for any
reason  other  than a  breach  or  default  by  such  terminating  party  of its
respective   representations,   warranties,   covenants,   agreements  or  other
obligations hereunder,  such that the conditions to the non-terminating  party's
Closing  obligations set forth in Section 9.1(a) or 9.1(b), or in Section 8.1(a)
or 8.1(b), as the case may be, would not be satisfied.

12.2 Manner of Exercise.  In the event of the  termination  of this Agreement by
either  TowerCo or AirTouch  pursuant to this Article 12,  notice  thereof shall
forthwith be given to the other party and this Agreement shall terminate and the
transactions contemplated hereunder shall be abandoned without further action by
any TowerCo Party or any Sublessor.

12.3 Effect of  Termination.  In the event of the  termination of this Agreement
pursuant to this Article 12 and prior to the  Closing,  all  obligations  of the
parties hereunder shall terminate,  except for the respective obligations of the
parties under Section 6.1(f) (Publicity),  Section 6.2(d)  (Publicity),  Section
6.4  (Confidentiality),  Section  13.1  (Covenant  Not to  Sue),  Section  13.14
(Expenses),  Section  13.16  (Dispute  Resolution)  and Section  13.17 (Power of
Attorney);  provided,  however,  that, except as otherwise expressly provided in
this  Section  12.3,  no  termination  of this  Agreement  shall  (a)  relieve a
defaulting  or breaching  party from any liability to the other party or parties
hereto for or in respect of such default or (b) result in the  rescission of any
Closing  theretofore  consummated  hereunder or affect or terminate  the rights,
remedies  and  obligations  of the  parties  with  respect  to  such  previously
consummated  Closing.  If this Agreement is terminated by AirTouch in accordance
with  Section  12.1(c) (or Section  12.1(b) or (subject to the proviso set forth
below) Section 12.1(e),  if any of the conditions set forth in Section 9.1(a) or
9.1(b) has not been  fulfilled  but all other  conditions  to  closing  shall be
fulfilled or capable of being  fulfilled) or by TowerCo other than in accordance
with Section 12.1,  Sublessors  shall be entitled to retain the Deposit (as, and
it shall be and is intended  to  constitute,  liquidated  damages for other than
willful breaches of this Agreement).
                                      -36-
<PAGE>   42


                                   ARTICLE 13

                                     General

             13.1 Covenant Not To Sue and Nonrecourse to Partners.

(a) Each of Parent and TowerCo agrees that  notwithstanding  any other provision
in this Agreement,  any agreement,  instrument,  certificate or document entered
into  pursuant  to or in  connection  with this  Agreement  or the  transactions
contemplated herein or therein and any rule of law or equity to the contrary, to
the fullest extent  permitted by law,  Sublessors'  obligations  and liabilities
under this Agreement and all other Transaction  Documents and in connection with
the  transactions  contemplated  herein and therein shall be  nonrecourse to all
direct and  indirect  general and limited  partners of any  Sublessor  that is a
partnership.

(b)  "Nonrecourse"  means that the  obligations  and  liabilities are limited in
recourse  solely to the assets of Sublessors  (for those  purposes,  any capital
contribution  obligations  of the general and limited  partners of Sublessors or
any negative capital account balances of such partners shall not be deemed to be
assets of Sublessors)  and are not guaranteed  directly or indirectly by, or the
primary  obligations  of, any general or limited  partner of any Sublessor,  and
neither  any  Sublessor  nor any  general  or limited  partner  or any  officer,
director,  partner, employee or agent of any Sublessor or any general or limited
partner of any successor  partnership,  either directly or indirectly,  shall be
personally  liable in any  respect  (except  to the  extent of their  respective
interests in the assets of any Sublessor) for any obligation or liability of any
Sublessor  under  any  Transaction  Document  or  any  transaction  contemplated
therein.

(c) "Direct"  partners include all general and limited partners of any Sublessor
that is a partnership,  and "indirect"  partners include all general and limited
partners  of each direct  partner  and all general and limited  partners of each
such indirect partner and all such further indirect partners and members thereof
and each such indirect partner.

(d) Each of Parent and TowerCo hereby  covenants for itself,  its successors and
assigns  that it,  its  successors  and  assigns  will not make,  bring,  claim,
commence,  prosecute,  maintain,  cause or  permit  any  action  to be  brought,
commenced, prosecuted,  maintained, either at law or equity, in any court of the
United  States or any state  thereof or in any  arbitration  forum  against  any
direct or indirect  member or general or limited  partner of  Sublessors  or any
officer,  director,  partner,  employee or agent of  Sublessors or any direct or
indirect  member or general or limited partner of Sublessors for (i) the payment
of any  amount  or the  performance  of any  obligation  under  any  Transaction
Document or (ii) the  satisfaction  of any liability  arising in connection with
any such payment or  obligation  or  otherwise,  including  without  limitation,
liability arising in law for tort (including, without limitation, for active and
passive negligence,  negligent  misrepresentation and fraud), equity (including,
without   limitation,   for   indemnification  and  contribution)  and  contract
(including,   without   limitation,   monetary   damages   for  the   breach  of
representation or warranty or performance of any of the covenants or obligations
contained  in any  Transaction  Document or with the  transactions  contemplated
herein or therein).

13.2  Assignment.  Neither  Parent nor TowerCo nor any  Sublessor may assign its
rights and obligations under, or grant a security interest in, this Agreement to
any Person without the
                                      -37-
<PAGE>   43



consent of the other parties hereto;  provided,  however, that (a) TowerCo  may,
upon prior  written  notice to  AirTouch, collaterally assign, mortgage, pledge,
hypothecate  or  otherwise  collaterally  transfer TowerCo's interest in this
Agreement to any Permitted Subleasehold Mortgagee (as defined in the Sublease),
and any such Permitted  Subleasehold  Mortgagee shall have  the  right  to
exercise   remedies  under  any  such  mortgage,  pledge, hypothecation or other
collateral  transfer  in a manner  consistent  with the provisions of this and
every other  agreement  between TowerCo and AirTouch made in connection with
this transaction; and (b) any Sublessor may assign its rights and  obligations
hereunder,  in  whole  or in part,  to any  Affiliate  of such Sublessor  to
which all or a part (as the case may be) of the  Towers  and Tower Sites of such
Sublessor are transferred without the consent of TowerCo. Upon the assignment by
any Sublessor of all of its rights and  obligations  hereunder in accordance
with clause (b) of the preceding  proviso,  the assigning  Sublessor will
automatically  be  released  from its  obligations  hereunder  without any
requirement of notice or further action.  A transfer by merger or  consolidation
by  AirTouch  or any  other  Sublessor  (whether  or not  AirTouch  or any other
Sublessor is the surviving entity) or any direct or indirect parent  corporation
of AirTouch or any other  Sublessor  shall not be deemed to be an assignment for
purposes of this Section.  All references herein to any party shall be deemed to
include any successor (including a corporate successor) to such party.

13.3  Parties in Interest.  All of the terms and  provisions  of this  Agreement
shall be  binding  upon and inure to the  benefit of and be  enforceable  by the
respective  successors  and  permitted  assigns of the parties  hereto;  whether
herein so expressed or not.  Except as provided in Sections  11.1,  11.2,  13.1,
and, as to Permitted Subleasehold Mortgagees,  13.2(a) to the extent provided in
such Section, no person other than Parent,  TowerCo and Sublessors may rely upon
any provision of this  Agreement or any  agreement,  instrument,  certificate or
document executed pursuant to this Agreement.

13.4     Time of Essence.  Time is of the essence in each and every provision in
this Agreement.


13.5  Severability.   Any  provision  of  this  Agreement  that  is  invalid  or
unenforceable in any jurisdiction shall, as to that jurisdiction, be ineffective
to the extent of such invalidity or  unenforceability  without rendering invalid
or  unenforceable  the remaining  provisions of this  Agreement or affecting the
validity or  enforceability  of any  provision  of this  Agreement  in any other
jurisdiction.

13.6  Amendment.  Except as otherwise  provided  herein,  this  Agreement may be
amended, modified or supplemented only by a writing duly executed by all parties
hereto.

13.7 Force Majeure. Should any circumstance beyond the reasonable control of any
party  occur  which  delays  or  renders   impossible  the  performance  of  its
obligations  (other than monetary  obligations) under this Agreement on the date
herein provided for (such  circumstance  being referred to as an event of "force
majeure"),  such obligation shall be postponed for such time as such performance
necessarily  has had to be  suspended or delayed on account  thereof,  but in no
event shall the foregoing be deemed to limit a party's  right to terminate  this
Agreement  under  Section  12.1(e).  In either  such event,  all  parties  shall
promptly  meet to determine an equitable  solution to the effects of such event,
provided  that any party that  fails  because  of force  majeure to perform  its
obligations  hereunder  will upon the  cessation  of the force  majeure take all

                                      -38-
<PAGE>   44


reasonable  steps  within  its power to resume  with the  least  possible  delay
compliance with its obligations.  Events of force majeure shall include, without
limitation,  war,  revolution,  invasion,  insurrection,  riots,  mob  violence,
sabotage or other civil disorders,  acts of God, strikes or other labor disputes
and any other  circumstances  beyond the  reasonable  control of the party whose
obligations are affected thereby.

13.8 Terms. Defined terms used herein are equally applicable to the singular and
plural  forms  as  appropriate.   Unless  otherwise   expressly  stated  herein,
references  to  Articles  and  Sections  are to  articles  and  sections of this
Agreement and references to parties,  Exhibits and Schedules are to the parties,
and the exhibits and schedules  attached,  to this Agreement.  References to the
"transactions  contemplated  hereby" refer to the  consummation  of the Closings
hereunder  and the  execution  and  delivery  of the  Transaction  Documents  as
provided  for herein,  and shall not be deemed to refer to any  contemplated  or
potential operation,  occupancy, use, leasing, management or servicing of any of
the Assets  and  related  Liabilities  (as  provided  in the  Sublease),  or the
exercise of control over the Assets, by TowerCo or its Affiliates.

13.9 Headings. The headings preceding the text of Sections of this Agreement are
for convenience only and shall not be deemed a part hereof.

13.10 Entire  Understanding;  Schedules.  The terms set forth in this  Agreement
including its Schedules and  Exhibits,  together with the  nondisclosure  letter
agreement  referenced  in Section 6.4 hereof,  are  intended by the parties as a
final, complete and exclusive expression of the terms of their agreement and may
not be  contradicted,  explained  or  supplemented  by  evidence  of  any  prior
agreement,  any  contemporaneous  oral  agreement or any  consistent  additional
terms. The Schedules and Exhibits  attached to this Agreement are made a part of
this  Agreement.  All  documents or  information  disclosed in the Schedules are
intended to be disclosed for all purposes  under this Agreement and will also be
deemed to be  incorporated  by reference  in each  Schedule to which they may be
relevant without further disclosure.

13.11 Counterparts.  This Agreement may be executed simultaneously in any number
of  counterparts,  each of which shall be deemed an  original,  but all of which
together shall constitute one and the same instrument.

13.12  Governing  Law.  This  Agreement  and the  performance  hereof  shall  be
governed,  interpreted,  construed  and  regulated  by the laws of the  State of
Delaware.

13.13 Notices.  Any notice or demand  desired or required to be given  hereunder
shall be in writing and shall be personally delivered, sent by telecopier,  sent
by overnight  courier or sent by  postage-prepaid  certified or registered mail,
return  receipt  requested,  and  addressed  as set forth below or to such other
address as either party shall have previously  designated by such a notice.  Any
notice so delivered  personally or by telecopy shall be deemed to be received on
the date of  delivery  or  transmission  by  telecopier;  any  notice so sent by
overnight  courier shall be deemed to be received one (1) Business Day after the
date sent;  and any notice so mailed  shall be deemed to be received on the date
stamped on the receipt  (rejection  or other  refusal to accept or  inability to
deliver  because of a change of  address  of which no notice was given  shall be
deemed to be receipt of the notice).
                                      -39-
<PAGE>   45


         If to Sublessors:

         c/o AirTouch Communications, Inc.
         One California Street
         San Francisco, CA 94111
         Attention: General Counsel
         Telephone: (415) 658-2000
         Telecopier: (415) 658-2287
         Copy to:

         Pillsbury Madison & Sutro LLP
         50 Fremont Street
         San Francisco, CA 94105
         Attention:  Nathaniel M. Cartmell III, Esq.
         Telephone:  (415) 983-1000
         Telecopier:  (415) 983-1200

         If to TowerCo or Parent:
         c/o SpectraSite Holdings, Inc.
         100 Regency Forest Drive, Suite 400
         Cary, NC 27511
         Attention:  General Counsel
         Telephone: (919) 468-0112
         Telecopier: (919) 468-8522

         Copy to:

         Dow, Lohnes & Albertson, PLLC
         One Ravinia Drive, Suite 1600
         Atlanta, GA 30346-2108
         Attention:  John W. McNamara, Esq.
         Telephone:  (770) 901-8800
         Telecopier:  (770) 901-8874

13.14 Expenses. Except as set forth in Sections 6.2 and 6.3, Sublessors,  Parent
and TowerCo  shall each bear its own costs and expenses  incurred in  connection
with the negotiation, preparation or execution of this Agreement (including, but
not  limited  to,  fees  and  expenses  of  attorneys,   accountants,   brokers,
consultants, finders and investment bankers), whether or not any Closing occurs.
In the event,  however,  that one of the parties hereto  breaches this Agreement
and fails to consummate  the  transaction  contemplated  hereby,  then,  without
limiting in any way any other  liability  which such  breaching  party may have,
such breaching party shall be responsible for all costs and expenses incurred by
the non-breaching party in connection herewith.

13.15 Attorneys'  Fees.  Except as provided in Section 13.16 with respect to the
arbitration  proceedings  referenced  therein,  in any action between any or all
Sublessors  and any
                                      -40-
<PAGE>   46


TowerCo  Party to  enforce  any of the  provisions  of this Agreement or any
right of any party under this Agreement,  regardless of whether the action or
proceeding is prosecuted to judgment and in addition to any other remedy,  the
unsuccessful  party shall pay to the prevailing party all costs and expenses,
including reasonable attorneys' fees and legal costs, incurred in the action by
the prevailing party.

13.16 Dispute  Resolution.  If a dispute arises between the parties  relating to
the interpretation,  performance or breach of this Agreement,  the parties agree
that upon written demand of either TowerCo or AirTouch, they will hold a meeting
within two weeks of such demand,  attended by individuals  with  decision-making
authority  regarding  the  dispute,  to  attempt in good  faith to  negotiate  a
resolution of the dispute prior to pursuing other  available  remedies.  If, ten
(10) days after the date set for such a meeting,  the parties have not succeeded
in negotiating a resolution of the dispute, either TowerCo (on behalf of TowerCo
and/or Parent) or AirTouch (on behalf of the  Sublessors)  may request that such
dispute be resolved  through  non-binding  arbitration.  Such  arbitration  (the
"Arbitration")  will be conducted in San  Francisco,  California,  in accordance
with  commercial  arbitration  rules  of the  American  Arbitration  Association
("AAA")  in  effect on the date of this  Agreement,  to the  extent  they do not
conflict with the terms of this Agreement. Absent any contrary agreement between
the parties,  there shall be no review by any court of the final decision by the
arbitrators or of the law applied or the legal reasoning used in the arbitration
process except upon a trial de novo in a court of competent  jurisdiction.  With
the  exception  of  actions  for  injunctive  relief  or which  must be filed to
preserve a party's  rights,  the  parties  agree to submit  any such  dispute to
non-binding arbitration before either party may commence any action in any court
of law  concerning  such dispute.  The parties agree to cooperate in dismissing,
without  prejudice,  any  legal  action  filed  before  the  conclusion  of such
arbitration,  except  an  action  brought  in  whole or in part to  compel  such
arbitration or an action seeking injunctive relief, or which cannot be dismissed
without  prejudice to a party's  rights.  The parties shall  cooperate with each
other in causing the  Arbitration  to be held in as efficient and  expeditious a
manner  as  practicable.  The  parties  have  selected  arbitration  in order to
expedite  the  resolution  of  disputes  and to reduce  the  costs  and  burdens
associated with litigation.  The parties agree that the arbitrators  should take
these concerns into account when determining the scope of permissible  discovery
and  other  hearing  and  pre-hearing  procedures.  Without  limiting  any other
remedies which may be available under  applicable  laws, the  arbitrators  shall
have no authority to award punitive damages.  The arbitrators shall render their
decision  within ninety (90) calendar days after the latest of the  arbitrators'
acceptance of their respective appointments to serve as arbitrators,  unless the
parties otherwise agree in writing or the arbitrators decide that a party to the
Arbitration  has shown good cause for a longer  period prior to the rendering of
the decision.

         Notice: By causing an authorized representative to initial in the space
below you are agreeing to have any dispute  arising out of the matters  included
in the `dispute resolution' provision decided by neutral arbitration and you are
giving up any rights you might possess to have the dispute  litigated in a court
of jury trial. By causing an authorized  representative  to initial in the space
below you are giving up your judicial rights to discovery and appeal unless such
rights are specifically included in the `dispute resolution'  provision.  If you
refuse to submit to  arbitration  after agreeing to this  provision,  you may be
compelled to arbitrate  under the authority of applicable Law. Your agreement to
this arbitration provision is voluntary.
                                      -41-


<PAGE>   47



         We have read and understand the foregoing and agree to submit  disputes
arising out of the matters  included in the  `dispute  resolution'  provision to
neutral arbitration.

 TowerCo's Initials _______ AirTouch's Initials ______ Parent's Initials _______

(a) Unless TowerCo and AirTouch agree in writing upon the number and identity of
the  arbitrators   within  five  (5)  business  days  after  the  initiation  of
Arbitration,  the  following  procedures  shall  govern  the  selection  of  the
arbitrators:

(i)      Each of TowerCo and  AirTouch  shall (by a written  notice to the other
         party  delivered  within ten (10) business days after the initiation of
         Arbitration)  select a single arbitrator,  who shall be selected from a
         list of potential  arbitrators  from the National  Panel of  Commercial
         Arbitrators supplied to the parties. If one party fails to deliver such
         notice of selection within the foregoing  ten-business-day period, then
         such party  shall have no right to select an  arbitrator  and the other
         party shall select a second arbitrator from such list by written notice
         to the first party.

(ii)     The two arbitrators selected pursuant to the foregoing clause (i) shall
         mutually  agree within ten (10) calendar days upon a third  arbitrator,
         who shall have no  substantial  relationship  to any party.  If the two
         arbitrators do not so select such third arbitrator within the foregoing
         10-day period, the third arbitrator will be selected by the AAA.

(b) All  proceedings  and  decisions of the  arbitrators  shall be maintained in
confidence,  to the extent legally permissible,  and shall not be made public by
any party or any arbitrator  without the prior written consent of all parties to
the Arbitration, except as may be required by law.

(c) Each party to the  Arbitration  shall bear its own costs and attorneys' fees
in connection with any  Arbitration,  and TowerCo and AirTouch (on behalf of the
Sublessors)  shall equally bear the fees,  costs and expenses of the arbitrators
and the Arbitration  proceedings;  provided,  however,  that the arbitrators may
exercise  discretion to award costs,  but not attorneys' fees, to the prevailing
party.

(d) Each party consents to the  jurisdiction  over it of the courts of the State
of  California  in the City and County of San Francisco and of the United States
Courts in the Northern District of California,  and agrees that personal service
of all process  may be made by  registered  or  certified  mail  pursuant to the
provisions of Section 13.13.

13.17 Power of Attorney.  Each and every  Sublessor  other than AirTouch  hereby
irrevocably  constitutes  and  appoints  AirTouch  as its and  their  agent  and
attorney-in-fact  to  modify,  amend or  otherwise  change  or waive any and all
terms,  conditions and other provisions of this Agreement, to exercise on behalf
of Sublessors any options or elections granted to Sublessors hereunder,  to take
all actions and execute all documents necessary or desirable to effect the terms
hereof and to take all actions and execute all documents  which may be necessary
or desirable in connection  therewith,  to give and receive all consents and all
notices   hereunder,   to   negotiate,   settle   and   compromise   claims  for
indemnification  hereunder,  and to  perform  any  other act  arising  out of or
pertaining to this Agreement. AirTouch hereby accepts the foregoing

                                      -42-
<PAGE>   48


appointment. Nothing herein shall be deemed to make AirTouch liable to any
Sublessor  because of  service  in  the  foregoing  capacity  as  agent  and
attorney-in-fact.  In performing  any of its duties under this Section,
AirTouch  shall not incur any Liability  whatsoever  to any  Sublessor  or  its
Affiliates.  It is  expressly understood  and agreed that this power of attorney
and the agency created hereby is  coupled  with an  interest  of the  respective
parties  hereto and shall be binding and enforceable on and against the
respective  successors and assigns of Sublessors, and each of them, and this
power of attorney shall not be revoked or terminated  and shall  continue  to be
binding  and  enforceable  in the manner provided herein.

13.18 Specific Performance; Other Rights and Remedies. Each party recognizes and
agrees  that in the event the other  party  should  refuse to perform any of its
obligations  under this  Agreement,  the remedy at Law would be  inadequate  and
agrees that for breach of such provisions, each party shall, in addition to such
other  remedies as may be available to it as provided in Article 11, be entitled
to  injunctive  relief  and to  enforce  its  rights by an action  for  specific
performance to the extent  permitted by applicable Law. Each party hereby waives
any  requirement  for  security  or the  posting of any bond or other  surety in
connection  with any temporary or permanent  award of  injunctive,  mandatory or
other equitable relief.

13.19 TowerCo Guaranty. Parent hereby unconditionally guarantees the payment and
performance  when due of all  obligations  of TowerCo now or hereafter  existing
under this  Agreement,  including  without  limitation  Article 11 (the "TowerCo
Obligations")  subject to all defenses  available to TowerCo  except as provided
below.  The  liability of Parent  under this  Section  13.19 shall extend to all
TowerCo  obligations  which  would be owed by TowerCo but for the fact that they
are  unenforceable  or  not  allowable  due to the  existence  of a  bankruptcy,
reorganization  or similar  proceeding  involving  TowerCo.  The  obligations of
Parent under this Section 13.19 are independent of TowerCo's  obligations  under
this  Agreement,  and a separate action or actions may be brought and prosecuted
against Parent to enforce its obligations under this Section 13.19, irrespective
of whether any action is brought against TowerCo or whether TowerCo is joined in
such action. This guarantee shall continue to be effective or be reinstated,  as
the  case  may  be,  if at any  time  any  payment  or  performance  of  TowerCo
Obligations  is rescinded or must  otherwise be returned by a recipient upon the
insolvency, bankruptcy or reorganization of TowerCo or for any other reason, all
as though such payment or performance had not been made. Parent  unconditionally
waives  (a)  all  notices  which  may be  required  by  statute,  rule of law or
otherwise, now or hereafter in effect, to preserve intact any rights of AirTouch
and any other  Sublessor  against Parent,  including,  without  limitation,  any
demand, presentment and protest, proof of notice of nonpayment or nonperformance
under agreement,  and notice of default or any failure on the part of TowerCo to
perform  and comply  with any  covenant,  agreement,  term or  condition  of any
agreement  executed or to be  executed by it, (b) any right to the  enforcement,
assertion or exercise by AirTouch or any other  Sublessor  of any right,  power,
privilege or remedy conferred  herein or in any agreement or otherwise,  (c) any
requirement  of  promptness  or  diligence  on the part of AirTouch or any other
Sublessor  hereunder,  (d) any  requirement on the part of AirTouch or any other
Sublessor to mitigate the damages  resulting from any Default hereunder or under
any other agreement, (e) any other circumstance whatsoever which might otherwise
constitute a legal or equitable discharge,  release or defense of a guarantor or
surety, or which might otherwise limit recourse against Parent, or (f) any right
to require AirTouch or any other Sublessor to proceed against any security or to
enforce any right.  The  obligations  of Parent set forth herein  constitute the
full recourse
                                      -43-
<PAGE>   49


obligations of Parent enforceable against it to the fullest extent of all of its
assets and properties,  notwithstanding any provision in any other agreements
limiting the liability of Parent, TowerCo or any TowerCo Affiliate or any other
Person.  Parent  will not  assert  any  right to which it may  become entitled,
including in any bankruptcy, insolvency or similar proceeding relating to
TowerCo or a TowerCo  Affiliate,  whether by  subrogation,  contribution  or
otherwise,  against TowerCo or such TowerCo  Affiliate or any of its properties,
by reason of the  performance by Parent of its  obligations  under this Section,
until such time as all of the  obligations  of TowerCo or TowerCo  Affiliate  to
AirTouch or any other applicable Sublessor shall be duly and fully performed.

                                      -44-
<PAGE>   50






         IN WITNESS  WHEREOF,  the  parties  hereto have  entered  into and duly
executed this Agreement as of the date and year first above written.

                                                     "SUBLESSORS":

                                                  AIRTOUCH COMMUNICATIONS, INC.


                                                   By:/s/ Arun Sarin
                                                      ------------------------
                                           Print Name:  Arun Sarin

                                                Title:  Chief Executive
                                                             Officer


                                                  LOS ANGELES SMSA LIMITED
                                                  PARTNERSHIP, a California
                                                  limited partnership

                                                  By AirTouch Cellular, a
                                                  California corporation,
                                                  as General Partner



                                                   By:/s/ Arun Sarin
                                                      ------------------------
                                           Print Name: Arun Sarin

                                                Title: President


                                                  OXNARD-VENTURA-SIMI LIMITED
                                                  PARTNERSHIP, a California
                                                  limited partnership

                                                     By AirTouch Cellular, a
                                                     California corporation,
                                                     as General Partner



                                                   By: /s/ Arun Sarin
                                                      ------------------------
                                           Print Name: Arun Sarin

                                                Title: President
                                      S-1
<PAGE>   51



                                                     "TOWERCO":

                                                     CALIFORNIA TOWER, INC.


                                                   By:/s/ Stephen H. Clark
                                                      ------------------------
                                           Print Name: Stephen H. Clark




                                                     "PARENT":

                                                    SPECTRASITE HOLDINGS, INC.


                                                    By:/s/ Stephen H. Clark
                                                      ------------------------
                                            Print Name: Stephen H. Clark

                                                 Title: Chief Executive Officer


                                      S-2

<PAGE>   1
                                                                   Exhibit 10.26


                      SECOND AMENDMENT TO CREDIT AGREEMENT

         This SECOND AMENDMENT TO CREDIT AGREEMENT (this "Amendment") is entered
into as of December 22, 1999, by and among SpectraSite  Communications,  Inc., a
Delaware corporation (the "Borrower"),  SpectraSite  Holdings,  Inc., a Delaware
corporation ("Holdco"),  CIBC World Markets Corp. (f/k/a CIBC Oppenheimer Corp.)
and Credit Suisse First Boston,  as arrangers (the  "Arrangers"),  Credit Suisse
First Boston, as syndication agent (the "Syndication Agent"),  Canadian Imperial
Bank of Commerce, as administrative agent (the "Administrative Agent"), Canadian
Imperial Bank of Commerce,  as collateral agent (the "Collateral Agent") and the
other Credit Parties signatory hereto (the "Credit Parties").

                              W I T N E S S E T H:

         WHEREAS,  the Borrower,  Holdco, the Arrangers,  the Syndication Agent,
the  Administrative  Agent,  the  Collateral  Agent and the Credit  Parties  are
parties to that certain Credit  Agreement dated as of April 20, 1999, as amended
by that certain First Amendment to Credit  Agreement dated as of August 23, 1999
(as the  same  may be  further  amended,  restated,  supplemented  or  otherwise
modified from time to time, the "Credit Agreement"); and

         WHEREAS, the Borrower and Holdco have requested, and the Arrangers, the
Syndication Agent, the Administrative Agent, the Collateral Agent and the Credit
Parties  have  agreed,  to amend the Credit  Agreement  as and to the extent set
forth  herein  and to waive  an  Event of  Default  existing  under  the  Credit
Agreement;

         NOW THEREFORE,  in  consideration  of the premises set forth above, the
terms and conditions contained herein and other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties hereby
agree that all  capitalized  terms used herein shall have the meanings  ascribed
thereto in the Credit Agreement,  as amended hereby, except as otherwise defined
or limited  herein,  and further agree,  subject to the conditions  precedent to
this Amendment hereinafter set forth, as follows:

1.     Amendments to Article 1.

(a)ab Article 1 of the Credit  Agreement,  Definitions,  is hereby  modified and
amended by adding the  following  new  definitions  to be placed in  appropriate
alphabetical order:

                  "`Apex' shall mean Apex Site Management Holdings, Inc., a
Delaware corporation.

                  "`Apex  Acquisition'  shall  mean the  Acquisition  of Apex by
         Holdco  pursuant to the terms and  conditions  of the Apex  Acquisition
         Documents and the subsequent

                                       1
<PAGE>   2


         transfer by Holdco to the Borrower of all of the issued and outstanding
         Capital Stock of Apex.

                  "`Apex  Acquisition  Documents' shall mean that certain Merger
         Agreement and Plan of Reorganization  dated as of November 24, 1999, as
         amended,  between the Borrower and Apex, and all schedules and exhibits
         thereto and documents executed in connection therewith.

                  "`Available  Cash' shall mean, on any  calculation  date,  the
         greater of (a) the amount of cash and cash  equivalents  on hand of the
         Borrower and its Subsidiaries minus $20,000,000, and (b) zero.

                  "`DigiPH' shall mean DigiPH PCS, Inc., an Alabama corporation.

                  "`DigiPH  Acquisition'  shall  mean  the  Acquisition  by  the
         Borrower of certain leases,  towers and related  facilities from DigiPH
         in conjunction with up to ninety-four (94) sites, and the related lease
         to DigiPH, under a master lease agreement,  of space on such towers and
         ground space on the land in the vicinity of such towers pursuant to the
         terms and conditions of the DigiPH Purchase Documents.

                  "DigiPH  Purchase  Documents'  shall mean that  certain  Asset
         Purchase  Agreement  dated as of November 5, 1999, as amended,  between
         the Borrower and DigiPH,  and all  schedules  and exhibits  thereto and
         documents executed in connection therewith.

                  "`Pre-Approved  Transactions'  shall mean,  collectively,  the
         Apex Acquisition,  the DigiPH Acquisition, the UbiquiTel Investment and
         the Acquisitions described in Section 8.5(xiii) hereof.

                  "`Pre-Approved     Transaction    Documents'    shall    mean,
         collectively,   the  Westower  Merger  Agreement,  the  NTA  Investment
         Documents,  the Apex Acquisition Documents,  DigiPH Purchase Documents,
         the UbiquiTel  Investment  Documents and the documents  relating to the
         Acquisitions  described  in Section  8.5(xiii)  hereof  (including  all
         schedules and exhibits thereto).

                  "`Second Amendment Date' shall mean December 22, 1999.

                  "`UbiquiTel' shall mean UbiquiTel Holdings, Inc., a Delaware
         corporation.

                  "`UbiquiTel  Investment"  shall  mean  the  Investment  by the
         Borrower  in  UbequiTel  pursuant  to the terms and  conditions  of the
         UbiquiTel Investment Documents in exchange for approximately twenty-six
         percent (26%) of the issued and outstanding equity of UbiquiTel.

                                       2
<PAGE>   3



                  "`UbiquiTel  Investment  Documents'  shall  mean that  certain
         Series A Preferred  Stock Purchase  Agreement  dated as of November 23,
         1999,  as amended,  among the  Borrower,  UbiquiTel  and certain  other
         parties,  and all schedules and exhibits thereto and documents executed
         in connection therewith."

(b) Article 1 of the Credit Agreement, Definitions, is hereby further modified
and amended by deleting the existing definition of "Equity Offering".

(c) Article 1 of the Credit Agreement, Definitions, is hereby further modified
and amended by deleting  the  existing  definition  of  "Leverage  Ratio" and by
substituting the following in lieu thereof:

                  "`Leverage  Ratio' shall mean, on any  calculation  date,  the
         ratio  of (a)  Borrower  Debt,  to  (b)  Annualized  EBITDA;  provided,
         however, that at all times prior to the first anniversary of the Second
         Amendment Date, for purposes of determining  the Borrower's  compliance
         with Section 9.1 hereof (and not affecting the calculation of any other
         Financial  Covenant  or  the  determination  of the  Applicable  Margin
         pursuant to Section  2.3(g)  hereof),  "Leverage  Ratio" shall mean the
         ratio of (i) the greater of (A) (I) Borrower Debt, minus (II) Available
         Cash, and (B) zero, to (b) Annualized EBITDA."

2. Amendment to Section 2.1. Section 2.1 of the Credit  Agreement,  The Loans,
is hereby  modified and amended by deleting the first  sentence from  subsection
(f) and by substituting the following in lieu thereof:

                  "The  proceeds  of the Loans  shall be used (i) to finance the
         Nextel  Acquisition,   (ii)  to  finance  Permitted   Acquisitions  and
         Permitted  Investments,  (iii) to provide funding for the  acquisition,
         construction/development,  management and build-out of Towers and Tower
         Sites,  (iv)  for  general  corporate  purposes   (including,   without
         limitation,  fees and expenses relating to the Nextel Acquisition,  any
         Permitted   Acquisitions   and  any  Permitted   Investments   and  the
         transactions   contemplated  by  this  Agreement  and  the  other  Loan
         Documents),  and (v) for working  capital and other  general  corporate
         purposes."

3. Amendment to Section 2.7.  Section 2.7 of the Credit  Agreement,  Mandatory
Repayments,  is hereby modified and amended by deleting in its entirety existing
subsection (c) and by substituting the following in lieu thereof:

                  "(c) Debt Issuance. If, after the Agreement Date, Holdco shall
         conduct  any  public or  private  issuance  of any  Funded  Debt or any
         Convertible  Securities  (other  than the  issuance  of the Holdco 2009
         Notes  in  an  amount  not  to  exceed   $340,003,656)  (each  a  "Debt
         Offering"),  and the  Leverage  Ratio on a pro forma basis after giving
         effect to such Debt  Offering  shall be greater than 4.00 to 1.00,  the
         Borrower  shall  apply,  on the date of receipt of the Net  Proceeds of
         such Debt Offering by Holdco,  up to one hundred  percent (100%) of the
         Net Proceeds received by Holdco

                                       3
<PAGE>   4



         with respect to such Debt Offering, to prepay the Senior Loans as set
         forth in Section 2.7(e)  hereof,  to the extent  necessary to cause the
         Leverage  Ratio to be less than or equal to 4.00 to 1.00 after giving
         effect to such Debt Offering."

4. Section 5.1(h) of the Credit Agreement, Title to Assets, is hereby modified
and amended by deleting the last  sentence  therefrom  and by  substituting  the
following in lieu thereof:

         "Tower Sub does not own any  material  Assets  other than Tower  Assets
         comprising the Nextel  Collateral and Tower Space Lease Agreements with
         Co-Locators on Towers comprising the Nextel Collateral, and Holdco does
         not own any  material  Assets  other than (i) the Capital  Stock of the
         Borrower,  (ii) the  Capital  Stock of any shell  Subsidiary  formed by
         Holdco   solely  for  the  purpose  of   consummating   any   Permitted
         Acquisition,   and  (iii)  on  the  closing   date  of  any   Permitted
         Acquisition,  the  Capital  Stock of any  target  company  acquired  in
         connection  with such Permitted  Acquisition  immediately  prior to the
         contribution of such Capital Stock to the Borrower."

5. Amendment to Section 6.2.  Section 6.2 of the Credit  Agreement,  Business;
Compliance with Applicable Law, is hereby amended by deleting the first sentence
therefrom and substituting the following in lieu thereof:

                   The Borrower  will,  and will cause each of its  Subsidiaries
         to,  engage solely in the business of the Tower  Operations,  the Other
         Operations  and in related  business  activities.  Holdco  will  engage
         solely  in the  business  of  holding  the  Capital  Stock  of (a)  the
         Borrower,  (b) any shell  Subsidiary  formed by Holdco  solely  for the
         purpose of  consummating  any Permitted  Acquisition,  and (iii) on the
         closing date of any Permitted Acquisition,  any target company acquired
         in connection with such Permitted Acquisition  immediately prior to the
         contribution of such Capital Stock to the Borrower."

6.  Amendment  to Section  6.9.  Section 6.9 of the Credit  Agreement,  Use of
Proceeds,  is hereby  amended by deleting the first  sentence  therefrom  and by
substituting the following in lieu thereof:

                   The Borrower will use the aggregate  proceeds of all Advances
         (a)  to  finance  the  Nextel  Acquisition,  (b) to  finance  Permitted
         Acquisitions and Permitted Investments,  (c) to provide funding for the
         acquisition,   construction/development  and  build-out  of  Towers  as
         permitted  hereunder,  (d) for general corporate  purposes  (including,
         without   limitation,   fees  and  expenses   relating  to  the  Nextel
         Acquisition,  any Permitted Acquisitions and any Permitted Investments,
         and the transactions  contemplated by this Agreement and the other Loan
         Documents),  and (e) for working  capital and other  general  corporate
         purposes."
                                       4
<PAGE>   5






7.  Amendment to Section  7.1.  Section 7.1 of the Credit  Agreement,  Monthly
Financial  Statements  and  Information,  is  hereby  amended  by  deleting  the
reference  to  "thirty  (30)  days"  contained  therein  and by  replacing  such
reference with "forty-five (45) days".

8. Amendment to Section 8.4.  Section 8.4 of the Credit  Agreement,  Amendment
and Waiver,  is hereby deleted in its entirety and the following  substituted in
lieu thereof:

                  Section  8.4 Amendment  and  Waiver .  Neither  Holdco nor the
         Borrower shall,  and the Borrower shall cause each of its  Subsidiaries
         not to, without the prior written consent of the Arrangers,  enter into
         any  amendment  of, or agree to or accept any waiver  of,  which  would
         materially  adversely  affect the rights of the Borrower and the Credit
         Parties,  under  any of  them,  of any of the  provisions  of,  (a) its
         organizational   documents,    including,   without   limitation,   its
         certificate  or articles of  incorporation  (other than any increase in
         the  number  of  authorized   shares)  and  by-laws,   (b)  the  Nextel
         Acquisition  Documents,  (c)  the  Indentures,  (d) the  Holdco  Equity
         Documents, and (f) the Pre-Approved Transaction Documents."

9.     Amendments to Section 8.5.

(a) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  modified  and amended by  deleting  existing
subsection (vii) and substituting the following in lieu thereof:

                  "(vii)  subject to  compliance  with  Section 6.10 and Section
         6.16 hereof,  the Borrower and its Subsidiaries  (other than Tower Sub)
         may make  Acquisitions  and  Investments  (including the acquisition of
         Capital  Stock  or  other  equity   interests  in  Persons  engaged  in
         businesses  similar to the Tower Operations) and form Subsidiaries with
         respect thereto, subject to the following conditions:

                           "(A)     no  Default  or Event of  Default  shall
then  exist  before  or after  giving  effect to any such Acquisition or
Investment;

                           "(B)  the  Purchase   Price  with  respect  any  such
                  Acquisition  or  Investment  shall be (I)  payable  solely  in
                  common stock of Holdco, or (II) payable in cash so long as (x)
                  the cash  portion of the  Purchase  Price with  respect to any
                  single  Acquisition  or  Investment  (with respect to a single
                  transaction  or a series of  related  transactions)  shall not
                  exceed $50,000,000,  and (y) the aggregate cash portion of the
                  Purchase Price for  Acquisitions  and Investments  consummated
                  pursuant to this clause (vii) (other than the  Acquisition  of
                  the Future  Nextel  Towers)  during the period from the Second
                  Amendment Date through the Tranche B Maturity Date,  shall not
                  exceed $200,000,000;

                           "(C) with respect to Acquisitions structured as Tower
                  Asset  exchanges or swaps,  the following  restrictions  shall
                  apply:   (x)  the  cash  outlay

                                       5
<PAGE>   6


                  by  the   Borrower  for  such Acquisition must be within the
                  dollar limitations set forth in the   preceding   clause  (B);
                  (y)  the   Annualized   EBITDA attributable  to the  Tower
                  Assets  being  acquired  must  be substantially similar to or
                  greater than the Annualized EBITDA of the Tower Assets being
                  exchanged or swapped; and (z) if the exchange  involves  more
                  than  twenty-five  (25)  Towers,  the Towers  acquired  in
                  such  transaction  must have as an anchor tenant a Nextel
                  Tenant or another tenant reasonably acceptable to the Majority
                  Lenders.

                           "(D) the Borrower  shall provide to the Arrangers and
                  the Lenders  calculations  demonstrating  pro forma compliance
                  with the  Financial  Covenants  after  giving  effect  to such
                  Acquisition or Investment; and

                           "(E)  with  respect  to  any  Acquisition  having  an
                  aggregate Purchase Price (with respect to a single transaction
                  or a series of related transactions) in excess of $20,000,000,
                  the Borrower  shall  provide to the  Arrangers and the Lenders
                  revised Projections  assuming  consummation of the Acquisition
                  and  demonstrating  pro forma  compliance  with the  Financial
                  Covenants through the Tranche B Maturity Date;"

(b) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and amended by adding the
following new subsections (xii) and (xiii) at the end thereof:

                  "(xii) so long as no Default or Event of Default  then  exists
         or would be caused  thereby,  the Borrower may  consummate  each of the
         Pre-Approved  Transactions  (other than the  transaction  described  in
         clause (xiii) below); and

                  (xiii)  so long as (A) no  Default  or Event of  Default  then
         exists or would be caused  thereby and (B) the Borrower  shall  provide
         the  Arrangers  with  evidence  satisfactory  to each of them  that the
         revenue and cash flow acquired by the Borrower in connection  with each
         such Acquisition  shall have no material  negative  deviations from the
         projected   revenue  and  cash  flow   relating  to   broadcast   tower
         Acquisitions as set forth in the Borrower's Projections with respect to
         such  Acquisitions  dated  December  1999, the Borrower may make one or
         more  Acquisitions  of broadcast  towers,  or of Persons engaged in the
         broadcast   tower   business,   on  terms  and  conditions   reasonably
         satisfactory  to the Arrangers and having an aggregate  Purchase Price,
         for all such Acquisitions, not to exceed $70,000,000 (inclusive of cash
         and stock consideration)."

10. Amendment to Section 8.7. Section 8.7 of the Credit Agreement,  Restricted
Payments and Purchases, is hereby amended by adding the following new subsection
(g) to the end thereof:

                                       6
<PAGE>   7


                   (g) on the  date on  which  the  Apex  Acquisition  shall  be
         consummated,  repayment  of any  existing  Indebtedness  of  Apex in an
         aggregate amount not to exceed $3,000,000."

11. Amendment to Section 8.9. Section 8.9 of the Credit  Agreement,  Corporate
Name;  Corporate Structure;  Business,  is hereby amended by deleting subsection
(b) therefrom and by substituting the following in lieu thereof:

                   (b) with respect to the Borrower and its Subsidiaries, engage
         in any  businesses  other  than  the  Tower  Operations  and the  Other
         Operations and activities related or incident thereto, and with respect
         to  Holdco,  engage in any  business  other  than that of  holding  the
         Capital Stock of (i) the Borrower,  (ii) any shell Subsidiary formed by
         Holdco   solely  for  the  purpose  of   consummating   any   Permitted
         Acquisition,   and  (iii)  on  the  closing   date  of  any   Permitted
         Acquisition,  any  target  company  acquired  in  connection  with such
         Permitted  Acquisition  immediately  prior to the  contribution of such
         Capital Stock to the Borrower"

12.  Waiver.  Pursuant to Section 4.5 of the Credit  Agreement,  the  Borrower
agreed to deliver to the Arrangers a duly executed landlord waiver agreement, in
form and substance satisfactory to the Arrangers and their counsel, with respect
to the  Borrower's  principal  place of  business  and the  Borrower's  premises
located at One Chase Corporate Drive,  Hoover,  Alabama,  on or before September
30, 1999 (such landlord waiver agreements being  hereinafter  referred to as the
"Required  Landlord  Waivers").  As of the date  hereof,  the  Borrower  has not
delivered  the  required  landlord  waiver  agreements  to  the  Arrangers  (the
"Landlord  Waiver  Default").   The  Arrangers,   the  Syndication   Agent,  the
Administrative  Agent,  the Collateral Agent and the Credit Parties hereby waive
the Landlord Waiver Default  existing as of the date hereof and hereby waive the
requirement  of  Section  4.5 that the  Borrower  deliver to the  Arrangers  the
Required  Landlord Waivers.  The waivers set forth in the immediately  preceding
sentence shall not waive any other requirement or hinder,  restrict or otherwise
modify the rights and remedies of the  Arrangers,  the  Syndication  Agent,  the
Administrative  Agent, the Collateral Agent and the Credit Parties following the
occurrence of any Default or Event of Default under the Credit Agreement.

13. No Other  Amendments,  Waivers or  Consents.  Except  for the  amendments,
waivers and consents set forth above,  the text of the Credit  Agreement and the
other Loan Documents  shall remain  unchanged and in full force and effect,  and
the Arrangers,  the Syndication Agent, the Administrative  Agent, the Collateral
Agent  and the  Credit  Parties  hereby  reserve  the  right to  require  strict
compliance with the terms of the Credit  Agreement and the other Loan Documents,
including,  without  limitation,  all terms  applicable to  Subsidiaries  of the
Borrower, in the future.

14.  Conditions  Subsequent.  As a  condition  subsequent  to the  amendments,
waivers and consents set forth in this Amendment,  the Borrower shall perform or
cause to be performed the  following  (the failure by the Borrower to so perform
or  cause  to be  performed  for

                                       7
<PAGE>   8



any  reason  (other  than  the  fact  that  the Pre-Approved   Transaction  to
which  such  condition   relates  was  not  ever consummated) constituting an
Event of Default under the Credit Agreement):

(a)      Collateral.   On  the  closing  date  for  each  of  the   Pre-Approved
         Transactions, the Borrower shall execute and deliver, or as applicable,
         cause its Subsidiaries to execute and deliver,  to the Collateral Agent
         all agreements, instruments and other items required to be so delivered
         pursuant to Section 6.16 of the Credit Agreement.

(b)      Definitive  Documentation.  Promptly  upon the  closing  of each of the
         Pre-Approved Transactions,  the Borrower shall deliver to the Arrangers
         a full set of copies of the documents  executed in connection with such
         Pre-Approved Transaction.

15. Conditions to  Effectiveness.  This Amendment shall be effective as of the
date first written above (the "Effective Date") upon the following:

                  (a) the Administrative Agent's receipt of a counterpart hereof
 duly executed by the Borrower and Holdco, and by the Majority Lenders;

                  (b) with respect to each of the Pre-Approved Transactions, the
         Arrangers'  receipt  of  (i)  updated   Projections  for  the  Borrower
         demonstrating  the Borrower's pro forma  compliance  with the Financial
         Covenants after giving effect thereto,  and (ii) copies of any material
         agreements relating to such Pre-Approved  Transaction in the possession
         of the Borrower; and

                  (c) the  representations  and  warranties  of  Holdco  and the
         Borrower set forth in the Credit  Agreement and this  Amendment,  other
         than those that are expressly  made as of a specific date, are true and
         correct in all  material  respects  with the same effect as though such
         representations and warranties had been made on and as of the Effective
         Date.

16.  Representations  and  Warranties.  Each of the Borrower  and Holdco,  for
itself  and on  behalf  of  each of its  Subsidiaries,  agrees,  represents  and
warrants in favor of the Arrangers,  the Syndication  Agent, the  Administrative
Agent, the Collateral Agent and the Credit Parties that:

(a)      This  Amendment  has been  executed and  delivered  by duly  authorized
         representatives  of the Borrower and Holdco,  and the Credit Agreement,
         as modified and amended by this Amendment,  constitutes a legal,  valid
         and binding  obligation  of the Borrower and Holdco and is  enforceable
         against the Borrower and Holdco in accordance with its terms, except as
         enforceability may be limited by bankruptcy, insolvency, reorganization
         or  similar  laws  affecting  creditors'  rights  generally  and by the
         application of general equitable principles;

                                       8
<PAGE>   9






(b)      Before and after giving effect to this  Amendment,  no Default or Event
         of Default  with  respect to the  Borrower  or Holdco  (other  than the
         Defaults  and Events of  Default  described  in Section 12 hereof)  has
         occurred and is continuing;

(c)      As of  the  date  hereof  and  after  giving  effect  to  each  of  the
         Pre-Approved Transactions,  (i) the property of the Borrower, at a fair
         valuation  on a going  concern  basis,  will exceed its debt;  (ii) the
         capital of the Borrower will not be  unreasonably  small to conduct its
         business;  and (iii) the Borrower will not have incurred debts, or have
         intended to incur  debts,  beyond its ability to pay such debts as they
         mature;

(d)      No  event  contemplated  in  connection  with  any of the  Pre-Approved
         Transactions  shall occur,  which has not been  consented to or waived,
         the  occurrence  of which  constitutes,  or with the passage of time or
         giving  of notice or both  would  constitute,  a  material  default  by
         Holdco, the Borrower or any of their respective  Subsidiaries under any
         material indenture,  agreement or other instrument,  including, without
         limitation,  the material Necessary  Authorizations and the Indentures,
         or any judgment,  decree or order, to which Holdco, the Borrower or any
         of their  respective  Subsidiaries  is a party or by which Holdco,  the
         Borrower  or any  of  their  respective  Subsidiaries  or any of  their
         respective properties may be bound or affected; and

(e)      All of the  representations  and  warranties of Holdco and the Borrower
         contained  in the Credit  Agreement  (other  than  representations  and
         warranties  that relate solely to a specified date) continue to be true
         and  correct in all  material  respects as of the date hereof as though
         made on and as of such date.

17. Effect on the Credit  Agreement.  Except as specifically  provided herein,
the  Credit  Agreement  shall  remain in full  force and  effect,  and is hereby
ratified,  reaffirmed and confirmed. This Amendment shall be deemed to be a Loan
Document for all purposes.

18.  Counterparts.  This  Amendment  may be executed in any number of separate
counterparts and by the different parties hereto on separate counterparts,  each
of which shall be deemed an original and all of which, taken together,  shall be
deemed to constitute one and the same  instrument.  In proving this Amendment in
any  judicial  proceedings,  it shall not be necessary to produce or account for
more than one such counterpart signed by the party against whom such enforcement
is sought. Any signatures  delivered by a party by facsimile  transmission shall
be deemed an original signature hereto.

                                       9
<PAGE>   10





19. Law of Contract.  THIS CONSENT SHALL BE CONSTRUED IN  ACCORDANCE  WITH AND
GOVERNED BY THE INTERNAL  LAWS OF THE STATE OF NEW YORK  APPLICABLE TO CONTRACTS
MADE AND TO BE PERFORMED WHOLLY WITHIN SUCH STATE.



                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

                                       10

<PAGE>   11



SECOND AMENDMENT (SPECTRASITE COMMUNICATIONS, INC.)
         IN WITNESS WHEREOF, this Amendment has been duly executed as of the day
and year first written above.

BORROWER:                   SPECTRASITE COMMUNICATIONS, INC.


                                    By:              /s/  David P. Tomick
                                                     ---------------------------
                                    Name:            David P. Tomick
                                    Title:           Executive Vice President



                                    Attest:
                                            Name:
                                            Title:


HOLDCO:                    SPECTRASITE HOLDINGS, INC.


                                    By:              /s/  David P. Tomick
                                                     ---------------------------
                                    Name:            David P. Tomick
                                    Title:           Executive Vice President



                                    Attest:
                                    Name:
                                    Title:





<PAGE>   12



ADMINISTRATIVE
AGENT:                              CANADIAN IMPERIAL BANK OF COMMERCE


                                    By:              /s/  Colleen Risorto
                                                     ---------------------------
                                    Name:            Colleen Risorto
                                    Title:           Executive Director
                        CIBC World Markets Corp. As Agent




<PAGE>   13



ARRANGERS:                          CIBC WORLD MARKETS CORP.
                                    (f/k/a CIBC Oppenheimer Corp.)


                                    By:              /s/  Colleen Risorto
                                                     ---------------------------
                                    Name:            Colleen Risorto
                                    Title:           Executive Director
                        CIBC World Markets Corp. As Agent

                                    CREDIT SUISSE FIRST BOSTON


                                    By:              /s/  Jeffrey B. Ulmer
                                                     ---------------------------
                                    Name:            Jeffrey B. Ulmer
                                    Title:           Vice President

                                    By:              /s/ Douglas E. Maher
                                                     ---------------------------
                                    Name:            Douglas E. Maher
                                    Title:           Vice President





<PAGE>   14



COLLATERAL AGENT: CANADIAN IMPERIAL BANK OF COMMERCE



                                    By:              /s/  Colleen Risorto
                                                     ---------------------------
                                    Name:            Colleen Risorto
                                    Title:           Executive Director
                        CIBC World Markets Corp. As Agent





<PAGE>   15



SYNDICATION AGENT:         CREDIT SUISSE FIRST BOSTON


                                    By:              /s/  Jeffrey B. Ulmer
                                                     ---------------------------
                                    Name:            Jeffrey B. Ulmer
                                    Title:           Vice President

                                    By:              /s/  Douglas E. Maher
                                                     ---------------------------
                                    Name:            Douglas E. Maher
                                    Title:           Vice President





<PAGE>   16



MANAGING AGENTS:           BANK OF MONTREAL, CHICAGO BRANCH


                                    By:             /s/  Karen Klapper
                                                    ----------------------------
                                    Name:            Karen Klapper
                                    Title:           Director


                                    THE BANK OF NOVA SCOTIA


                                    By:         /s/  Vincent J. Fitzgerald, Jr.
                                                --------------------------------
                                    Name:            Vincent J. Fitzgerald, Jr.
                                    Title:           Authorized Signatory


                                    FLEET NATIONAL BANK (f/k/a BankBoston, N.A.)


                                    By:              /s/  Shepard D. Rainie
                                                     ---------------------------
                                    Name:            Shepard D. Rainie
                                    Title:           Managing Director


                           DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN BRANCHES


                                    By:             /s/  Patrick A. Keleher
                                                    ----------------------------
                                    Name:            Patrick A. Keleher
                                    Title:           Vice President


                                    By:             /s/  Brian E. Haughney
                                                    ----------------------------
                                    Name:            Brian E. Haughney
                                    Title:           Assistant Vice President


                                    TORONTO DOMINION (TEXAS), INC.


                                    By:             /s/  Sheila M. Conley
                                                    ----------------------------
                                    Name:            Sheila M. Conley
                                    Title:           Vice President

                                    UNION BANK OF CALIFORNIA, N.A.


                                    By:             /s/  Peter C. Connoy
                                                    ----------------------------
                                    Name:            Peter C. Connoy
                                    Title:           Vice President





<PAGE>   17



CO-AGENT:                           CREDIT LYONNAIS NEW YORK BRANCH


                                    By:             /s/  Mark A. Campellone
                                                    ----------------------------
                                    Name:            Mark A. Campellone
                                    Title:           First Vice President





<PAGE>   18



LENDERS:                   CIBC INC.


                                    By:              /s/  Colleen Risorto
                                                     ---------------------------
                                    Name:            Colleen Risorto
                                    Title:           Executive Director
                        CIBC World Markets Corp. As Agent





<PAGE>   19



                                    CREDIT SUISSE FIRST BOSTON


                                    By:              /s/  Jeffrey B. Ulmer
                                                     ---------------------------
                                    Name:            Jeffrey B. Ulmer
                                    Title:           Vice President


                                    By:              /s/  Douglas E. Maher
                                                     ---------------------------
                                    Name:            Douglas E. Maher
                                    Title:           Vice President





<PAGE>   20



                                    BANK OF MONTREAL, CHICAGO BRANCH


                                    By:             /s/  Karen Klapper
                                                    ----------------------------
                                    Name:            Karen Klapper
                                    Title:           Director




<PAGE>   21



                                    THE BANK OF NOVA SCOTIA


                                    By:          /s/  Vincent J. Fitzgerald, Jr.
                                                 -------------------------------
                                    Name:             Vincent J. Fitzgerald, Jr.
                                    Title:           Authorized Signatory





<PAGE>   22



                                    FLEET NATIONAL BANK (f/k/a BankBoston, N.A.)


                                    By:              /s/  Shepard D. Rainie
                                                     ---------------------------
                                    Name:                 Shepard D. Rainie
                                    Title:                Managing Director




<PAGE>   23



                            DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN BRANCHES


                                    By:              /s/  Patrick A. Keleher
                                                     ---------------------------
                                    Name:            Patrick A. Keleher
                                    Title:           Vice President


                                    By:              /s/  Brian E. Haughney
                                                     ---------------------------
                                    Name:            Brian E. Haughney
                                    Title:           Assistant Vice President




<PAGE>   24



                                    TORONTO DOMINION (TEXAS), INC.


                                    By:              /s/  Sheila M. Conley
                                                     ---------------------------
                                    Name:            Sheila M. Conley
                                    Title:           Vice President





<PAGE>   25



                                    UNION BANK OF CALIFORNIA, N.A.


                                    By:              /s/  Peter C. Connoy
                                                     ---------------------------
                                    Name:            Peter C. Connoy
                                    Title:           Vice President





<PAGE>   26



                                    CREDIT LYONNAIS NEW YORK BRANCH


                                    By:              /s/  Mark A. Campellone
                                                     ---------------------------
                                    Name:            Mark A. Campellone
                                    Title:           First Vice President





<PAGE>   27



                                    THE BANK OF NEW YORK


                                    By:              /s/  Gerry Granovsky
                                                     ---------------------------
                                    Name:            Gerry Granovsky
                                    Title:           Vice President





<PAGE>   28



                                    CAISSE DE DEPOT ET PLACEMENT DU QUEBEC


                                    By:              /s/  Louis Lavoie
                                                     ---------------------------
                                    Name:            Louis Lavoie
                                    Title:           Manager


                                    By:              /s/  Lucie Rousseau
                                                     ---------------------------
                                    Name:            Lucie Rousseau
                                    Title:           Vice President





<PAGE>   29



                                    CANADIAN IMPERIAL BANK OF COMMERCE


                                    By:              /s/  Colleen Risorto
                                                     ---------------------------
                                    Name:            Colleen Risorto
                                    Title:           Executive Director
                        CIBC World Markets Corp. As Agent




<PAGE>   30



                                    THE CIT GROUP/EQUIPMENT FINANCING, INC.


                                    By:             /s/  Daniel E. A. Nichols
                                                    ----------------------------
                                    Name:            Daniel E. A. Nichols
                                    Title:           Assistant Vice President





<PAGE>   31



                                    CYPRESSTREE INVESTMENT FUND, LLC

                       By:     CypressTree Investment Management Company, Inc.,
                               its Managing Member


                                    By:
                                    Name:
                                    Title:





<PAGE>   32



                                    NORTHAMERICAN SENIOR FLOATING RATE FUND

                       By:     CypressTree Investment Management Company, Inc.,
                               its Managing Member


                                    By:
                                    Name:
                                    Title:




<PAGE>   33



                                 CYPRESSTREE INVESTMENT MANAGEMENT COMPANY, INC.

                       As:     Attorney-in-Fact and on behalf of First Allmerica
                               Financial Life Insurance Company as Portfolio
                               Manager


                                    By:
                                    Name:
                                    Title:





<PAGE>   34



                                    KZH CYPRESSTREE-1 LLC


                                    By:              /s/  Peter Chin
                                                     ---------------------------
                                    Name:            Peter Chin
                                    Title:           Authorized Agent





<PAGE>   35



                                    FREMONT INVESTMENT & LOAN


                                    By:
                                    Name:
                                    Title:





<PAGE>   36



                                    HELLER FINANCIAL, INC.


                                    By:              /s/  Scott Ziemke
                                                     ---------------------------
                                    Name:            Scott Ziemke
                                    Title:           Assistant Vice President





<PAGE>   37



                                    MERRILL LYNCH SENIOR FLOATING RATE
                                    FUND, INC.


                                    By:
                                    Name:
                                    Title:





<PAGE>   38



                   PPM AMERICA, INC., as attorney in fact, on behalf of Jackson
                   National Life Insurance Company


                                    By:
                                    Name:
                                    Title:





<PAGE>   39



                 Fleet   National  Bank  (f/k/a   BankBoston, N.A.), as Trust
                 Administrator for LONGLANE MASTER TRUST IV


                                    By:
                                    Name:
                                    Title:





<PAGE>   40



                                    GALAXY CLO 1999-1, LTD.

                    By:     SAI Investment Advisor, Inc., its Collateral Manager


                                    By:
                                    Name:
                                    Title:





<PAGE>   41



                                    OXFORD STRATEGIC INCOME FUND

                           By:     Eaton Vance Management, as Investment Advisor


                                    By:              /s/  Scott H. Page
                                                     ---------------------------
                                    Name:            Scott H. Page
                                    Title:           Vice President





<PAGE>   42



                                    SENIOR DEBT PORTFOLIO

                   By:     Boston Management and Research, as Investment Advisor


                                    By:              /s/ Scott H. Page
                                                     ---------------------------
                                    Name:            Scott H. Page
                                    Title:           Vice President





<PAGE>   43



                                    J.H. WHITNEY MARKET VALUE FUND, L.P.

                        By:     J.H. Whitney Value GP, Ltd., its General Partner


                                    By:
                                    Name:
                                    Title:





<PAGE>   44



                                    J.H. WHITNEY MEZZANINE FUND, L.P.

                               By:           Whitney GP, Ltd. - General Partner
                                             -----------------------------------


                                    By:              /s/  Daniel J. O'Brien
                                                     ---------------------------
                                    Name:            Daniel J. O'Brien
                                    Title:           Managing Member





<PAGE>   45



                                    BANK OF AMERICA, N.A.


                                    By:
                                    Name:
                                    Title:





<PAGE>   46



                                    DEBT STRATEGIES FUND II, INC.


                                    By:
                                    Name:
                                    Title:




<PAGE>   47



                                    DEBT STRATEGIES FUND III, INC.


                                    By:
                                    Name:
                                    Title:





<PAGE>   48



                                    THE FUJI BANK, LIMITED, NEW YORK BRANCH


                                    By:
                                    Name:
                                    Title:





<PAGE>   49



                                    VAN KAMPEN SENIOR INCOME TRUST


                                    By:            /s/  Darvin D. Pierce
                                                   -----------------------------
                                    Name:          Darvin D. Pierce
                                    Title:           Vice President





<PAGE>   50



                                    PROSPECT INTERNATIONAL DEBT
                                    STRATEGY FUND


                                    By:
                                    Name:
                                    Title:





<PAGE>   51



                                    CARAVELLE INVESTMENT FUND L.L.C.


                                    By:              /s/  Dean T. Criares
                                                     ---------------------------
                                    Name:            Dean T. Criares
                                    Title:           Managing Director




<PAGE>   52



                                    EATON VANCE SENIOR INCOME TRUST


                                    By:              /s/  Scott H. Page
                                                     ---------------------------
                                    Name:            Scott H. Page
                                    Title:           Vice Presisdent




<PAGE>   53



                                    MERRILL LYNCH SENIOR FLOATING RATE
                                    FUND    II, INC.


                                    By:
                                    Name:
                                    Title:




<PAGE>   54



                                     MORGAN STANLEY DEAN WITTER PRIME
                                    INCOME TRUST


                                    By:
                                    Name:
                                    Title:




<PAGE>   55



                                    ELC "Cayman" Ltd. 1999-III


                                    By:              /s/  Thomas M.Finke
                                                     ---------------------------
                                    Name:            Thomas M. Finke
                                    Title:           Managing Director

<PAGE>   1
                                                                   Exhibit 10.27


                       THIRD AMENDMENT TO CREDIT AGREEMENT

              This THIRD  AMENDMENT TO CREDIT  AGREEMENT  (this  "Amendment") is
entered into as of February 14, 2000, by and among  SpectraSite  Communications,
Inc., a Delaware  corporation (the "Borrower"),  SpectraSite  Holdings,  Inc., a
Delaware  corporation  ("Holdco"),  CIBC World Markets  Corp.  and Credit Suisse
First Boston,  as arrangers (the  "Arrangers"),  Credit Suisse First Boston,  as
syndication agent (the "Syndication Agent"), Canadian Imperial Bank of Commerce,
as administrative agent (the "Administrative Agent"),  Canadian Imperial Bank of
Commerce,  as collateral  agent (the "Collateral  Agent"),  and the other Credit
Parties signatory hereto (the "Credit Parties").

                              W I T N E S S E T H:

              WHEREAS,  the Borrower,  Holdco,  the Arrangers,  the  Syndication
Agent, the Administrative Agent, the Collateral Agent and the Credit Parties are
parties to that certain Credit  Agreement dated as of April 20, 1999, as amended
by that certain First Amendment to Credit  Agreement dated as of August 23, 1999
and that certain Second  Amendment to Credit  Agreement dated as of December 22,
1999 (as the same may be further  amended,  restated,  supplemented or otherwise
modified from time to time, the "Credit Agreement"); and

              WHEREAS,   the  Borrower  and  Holdco  have  requested,   and  the
Arrangers, the Syndication Agent, the Administrative Agent, the Collateral Agent
and the Credit Parties have agreed,  to amend the Credit Agreement as and to the
extent set forth herein;

              NOW THEREFORE,  in  consideration of the premises set forth above,
the  terms  and  conditions   contained  herein  and  other  good  and  valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties  hereby  agree that all  capitalized  terms used  herein  shall have the
meanings ascribed thereto in the Credit Agreement,  as amended hereby, except as
otherwise  defined  or  limited  herein,  and  further  agree,  subject  to  the
conditions precedent to this Amendment hereinafter set forth, as follows:

1.          Amendment to Article 1.

(a)ab Article 1 of the Credit  Agreement,  Definitions,  is hereby  modified and
amended by adding the  following  new  definitions  to be placed in  appropriate
alphabetical order:

                      "Additional   Nextel   Towers"  shall  mean  those  Towers
              acquired in  connection  with the Nextel 2 Purchase  Documents and
              any additional Towers acquired from Nextel.

                      "`AirTouch' shall mean AirTouch Communications, Inc., a
              Delaware corporation."

                                       1
<PAGE>   2


                      "`AirTouch  Acquisition'  shall  mean the  Acquisition  by
              California   Tower  of  certain  Tower  Assets  from  AirTouch  in
              conjunction  with up to 550 Tower Sites  pursuant to the terms and
              conditions  of the AirTouch  Purchase  Documents  for an aggregate
              purchase price not to exceed $198,000,000.

                      "`AirTouch  Purchase  Documents' shall mean those certain
              documents set forth on Schedule 1.1 attached hereto and
                        -----------------------------
              made a part hereof.

                      "`AirTouch Tenants' shall mean AirTouch and any of its
              subsidiaries or controlled Affiliates.

                      "`California  Tower' shall mean California Tower,  Inc., a
              Delaware   corporation  and  a  wholly  owned  Subsidiary  of  the
              Borrower.

                      "`Nextel  2  Acquisition'  shall mean the  Acquisition  by
              Tower Sub of certain Tower Assets from Nextel in conjunction  with
              up to twenty-six  (26) sites  pursuant to the terms and conditions
              of the Nextel 2 Purchase Documents.

                      "Nextel 2  Purchase  Documents'  shall  mean the  purchase
              agreement  and  related  documents  pursuant  to which  Tower  Sub
              acquires certain  Additional Nextel Towers from Nextel West Corp.,
              a Delaware  Corporation,  Nextel of  California,  Inc., a Delaware
              corporation,   each  d/b/a  Nextel   Communications,   and  Nextel
              Communications, Inc., a Delaware corporation.

(b) Article 1 of the Credit Agreement, Definitions, is hereby further modified
and amended by deleting  the existing  definitions  of "Future  Nextel  Towers,"
"Pre-Approved  Transactions"  and  "Pre-Approved  Transaction  Documents" and by
substituting the following in lieu thereof:

                      "`Future  Nextel Towers' shall mean (i) those Towers,  the
              construction  of which is completed after the Agreement Date by or
              for any of the  Nextel  Tenants,  or to  which  any of the  Nextel
              Tenants otherwise  acquires rights after the Agreement Date, which
              are sold,  transferred  or assigned  to Tower Sub  pursuant to the
              terms  of the  Master  Site  Commitment  Agreement,  and  (ii) the
              Additional Nextel Towers."

                      "`Pre-Approved Transactions' shall mean, collectively, the
              Apex   Acquisition,   the  DigiPH   Acquisition,   the   UbiquiTel
              Investment, the AirTouch Acquisition, the Nextel 2 Acquisition and
              the Acquisitions described in Section 8.5(xiii) hereof.

                      "`Pre-Approved    Transaction   Documents'   shall   mean,
              collectively,  the Westower Merger  Agreement,  the NTA Investment
              Documents,   the  Apex  Acquisition  Documents,   DigiPH  Purchase
              Documents,   the  UbiquiTel  Investment  Documents,  the  AirTouch
              Purchase Documents, the Nextel 2 Purchase Documents, the documents
              relating to the  acquisition  of Additional  Nextel Towers and the
              documents  relating  to

                                       2
<PAGE>   3


              the  Acquisitions  described  in  Section 8.5(xiii) hereof
             (including all schedules and exhibits thereto).

2.  Amendment to Article 5. Section 5.1(h) of the Credit  Agreement,  Title to
Assets,  is hereby modified and amended by deleting the last sentence  therefrom
and by substituting the following in lieu thereof:

              "Tower  Sub does not own any  material  Assets  other  than  Tower
              Assets  comprising  the  Nextel  Collateral,   Tower  Space  Lease
              Agreements  with  Co-Locators  on  Towers  comprising  the  Nextel
              Collateral and the Additional Nextel Towers. California Tower does
              not own any  material  Assets  other  than Tower  Assets  acquired
              pursuant to the  AirTouch  Acquisition  Documents  and  additional
              Tower Assets acquired in accordance with Section  8.5(iii) of this
              Agreement.  Holdco does not own any material Assets other than (i)
              the Capital Stock of the  Borrower,  (ii) the Capital Stock of any
              shell  Subsidiary  formed  by Holdco  solely  for the  purpose  of
              consummating any Permitted  Acquisition,  and (iii) on the closing
              date of any Permitted Acquisition, the Capital Stock of any target
              company  acquired in connection  with such  Permitted  Acquisition
              immediately prior to the contribution of such Capital Stock to the
              Borrower."

3.          Amendment to Section 8.2.

(a)ab Section 8.2 of the Credit Agreement,  Investments,  is hereby modified and
amended by adding "and California Tower" after the reference to Tower Sub in the
parenthetical  in line 4 thereof,  such that after  giving  effect  thereto such
Section 8.2 shall begin as follows:

                      "Section 8.2  Investments. Neither Holdco nor the Borrower
              shall,  and the Borrower shall not permit any of its Subsidiaries
              to, make any loan or advance, or make any Investment  or otherwise
              acquire any evidences of Funded Debt, Capital Stock or other
              securities of any Person,  except that the Borrower and its
              Subsidiaries (other than Tower Sub and California Tower) may  . ."

(b)  Section  8.2 of the  Credit  Agreement,  Investments,  is hereby  further
modified and amended by deleting  existing  clause (e) thereof and  substituting
the following therefor:

                      "(e) make loans or advances to  employees  in the ordinary
              course of business in an aggregate amount not to exceed $2,000,000
              at any time outstanding;"

                                       3
<PAGE>   4




4.          Amendment to Section 8.5.

(a)ab Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition of Assets,  is hereby modified and amended by adding "and California
Tower"  after  the  reference  to Tower  Sub in the  parenthetical  in line 1 of
subsection (ii) (A) thereof,  such that after giving effect thereto, the text of
such Section 8.5(ii)(A) prior to the proviso therein shall read as follows:

                      "(A) a merger  among  Holdco,  the Borrower or one or more
              Subsidiaries  (other than Tower Sub and California  Tower) with or
              into any other Person,  or, subject to Section  8.5(vii) below, an
              Acquisition permitted hereunder effected by a merger;"

(b) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and  amended by  deleting
existing  subsections  (ii) (B) and (C) thereof and  substituting  the following
therefor:

                      "(B) a merger between or among two or more Subsidiaries
(other than Tower Sub and California Tower); and

                      (C)  a  liquidation   or   dissolution   of  one  or  more
              Subsidiaries  (other Tower Sub and  California  Tower) into its or
              their  parent  entity   (provided  the  Borrower  or  one  of  its
              Subsidiaries  (other than Tower Sub and California  Tower) is such
              parent entity);"

(c) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and  amended by  deleting
existing subsection (iii) thereof and substituting the following therefor:

                      "(iii) subject to compliance  with Sections 6.10, 6.16 and
              8.5(vii)  hereof,  (A) Tower Sub may  acquire  the  Future  Nextel
              Towers and the Additional  Nextel Towers and (B) California  Tower
              may acquire  additional Tower Assets from AirTouch with respect to
              which an AirTouch Tenant is the anchor tenant;"

(d) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and  amended by  deleting
existing subsection (v) thereof and substituting the following therefor:

                      "(v) the Borrower and its  Subsidiaries  (other than Tower
              Sub and  California  Tower) may (A) make  Investments as permitted
              under  Section  8.2(a) and (b)  hereof,  and (B)  transfer  Assets
              amongst themselves;"

(e) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition of Assets,  is hereby  further  modified and amended by deleting the
opening  paragraph of existing  subsection  (vii) thereof and  substituting  the
following therefor:

                                       4
<PAGE>   5



                      "(vii) subject to compliance with Section 6.10 and Section
              6.16 hereof,  the Borrower and its Subsidiaries  (other than Tower
              Sub and California Tower) may make  Acquisitions,  and Investments
              (including  the   acquisition  of  Capital  Stock  or  the  equity
              interests in persons  engaged in  businesses  similar to the Tower
              Operations) and form Subsidiaries with respect thereto,  and Tower
              Sub  and  California  Tower  may  make  acquisitions  of the  type
              permitted under Section 8.5(iii)  hereof,  in each case subject to
              the following conditions:"

(f) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and  amended by  deleting
existing part (B) of subsection  (vii)  thereof and  substituting  the following
therefor:

                               "(B) the  Purchase  Price with  respect  any such
                      Acquisition  or Investment  shall be (I) payable solely in
                      common stock of Holdco, or (II) payable in cash so long as
                      (x) the cash portion of the Purchase Price with respect to
                      any single  Acquisition  or Investment  (with respect to a
                      single  transaction  or a series of related  transactions)
                      shall not exceed  $50,000,000,  and (y) the aggregate cash
                      portion  of  the  Purchase  Price  for   Acquisitions  and
                      Investments  consummated  pursuant  to this  clause  (vii)
                      (other than Tower Assets  acquired  pursuant to subsection
                      8.5(iii)) during the period from the Second Amendment Date
                      through  the  Tranche B  Maturity  Date,  shall not exceed
                      $200,000,000;

(g) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and  amended by  deleting
existing subsection (viii) thereof and substituting the following therefor:

                      "(viii)  the  Borrower  and its  Subsidiaries  (other than
              Tower Sub and California  Tower) may acquire and construct  Towers
              and Tower Sites without an anchor tenant reasonably  acceptable to
              the  Arrangers  (with any Nextel  Tenant or AirTouch  Tenant being
              deemed  acceptable)  under  contract,  so  long  as the  aggregate
              Investment  for such  Towers and Tower  Sites is at all times less
              than $10,000,000,  provided,  however, that if the Borrower or the
              applicable Subsidiary shall enter into a binding contract with any
              anchor tenant  reasonably  acceptable  to the Arrangers  (with any
              Nextel  Tenant or AirTouch  Tenant being deemed  acceptable)  with
              respect  to any such  Tower or Tower  Site,  the book value of the
              Investment  of the Borrower or the  applicable  Subsidiary in such
              Tower  or  Tower  Site  shall  be  thereafter  excluded  from  the
              investments  subject to the  $10,000,000  limitation  provided for
              herein;"

(h) Section 8.5 of the Credit Agreement,  Liquidation;  Merger; Acquisition or
Disposition  of Assets,  is hereby  further  modified  and  amended by  deleting
existing subsection (xii) thereof and substituting the following therefor:

                      "(xii)  so long as no  Default  or Event of  Default  then
              exists or would be caused  thereby,  subject  to  compliance  with
              Sections 6.10 and 6.16 hereof,  the

                                       5
<PAGE>   6


              Borrower and its  Subsidiaries (other than Tower Sub and
              California Tower) may consummate each of the Pre-Approved
              Transactions (other than the Nextel 2 Acquisition
              and the transaction described in clause (xiii) below);"

5.  Amendment to Section 8.6.  Section 8.6  Limitation on Guaranties is hereby
amended by adding  the words "and  California  Tower" to the  parenthetical  set
forth in item (d) thereof,  such that after giving effect  thereto,  item (d) of
Section 8.6 shall read as follows:

                      "(d)   a guaranty by Holdco,  the  Borrower  or any of its
              Subsidiaries  (other than Tower Sub and  California Tower) of the
              performance obligations of the Borrower or any of its
              Subsidiaries."

6.  Amendment to Article 10. Section 10.1 of the Credit  Agreement,  Events of
Default  (Senior  Obligations),  is hereby  modified and amended by deleting the
world "or" after item (r)  thereof,  deleting  the period after item (s) thereof
and inserting "; or"  therefor,  and adding the  following  new  subsection  (t)
thereafter:

                      "(t)  (i) An  event  of  default  shall  occur  under  the
              Sublease  (as  defined  in  the  Schedule  of  AirTouch   Purchase
              Documents  appended  to the  Third  Amendment  to this  Agreement)
              entitling the sublessor  thereunder to (x) terminate such Sublease
              with respect to Material  Towers,  or (y)  terminate  the Sublease
              with  respect to all sites  subject  thereto,  or (ii) an event of
              default  shall occur under the Master Tower Site Lease (as defined
              in the  schedule of AirTouch  Purchase  Documents  attached to the
              Third Amendment to this Agreement) entitling AirTouch to terminate
              such Master Tower Site Lease with respect to Material Towers."

7. No Other Amendments. Except for the amendments set forth above, the text of
the Credit  Agreement and the other Loan Documents shall remain unchanged and in
full  force  and  effect,   and  the  Arrangers,   the  Syndication  Agent,  the
Administrative Agent, the Collateral Agent and the Credit Parties hereby reserve
the right to require strict  compliance  with the terms of the Credit  Agreement
and  the  other  Loan  Documents,   including,  without  limitation,  all  terms
applicable to Subsidiaries of the Borrower, in the future.

8.  Conditions  Subsequent.  As a condition  subsequent to the  amendments set
forth in this Amendment, the Borrower shall perform or cause to be performed the
following  (the  failure by the  Borrower to so perform or cause to be performed
for any reason constituting an Event of Default under the Credit Agreement):

(a)           Collateral.  On  each  of  the  closing  dates  for  the  AirTouch
              Acquisition,  the  Borrower  shall  execute  and  deliver,  or  as
              applicable,  cause its Subsidiaries to execute and deliver, to the
              Collateral  Agent all  agreements,  instruments  and  other  items
              required to be so delivered pursuant to Section 6.16 of the Credit
              Agreement,  including, without limitation, a collateral assignment
              of the AirTouch Purchase  Documents in favor of the Administrative
              Agent.
                                       6
<PAGE>   7




(b)           Definitive  Documentation.  Promptly  upon  the  closing  of  each
              AirTouch Acquisition,  the Borrower shall deliver to the Arrangers
              a full set of copies of the documents  executed in connection with
              such Acquisition, which documents shall not differ materially from
              the drafts thereof furnished to the Administrative  Agent prior to
              the Effective Date (as defined below).

9.   Conditions to  Effectiveness.  This Amendment shall be effective as of the
date first written above (the "Effective Date") upon the following:

                      (a)  the  Administrative Agent's  receipt of a counterpart
 hereof duly executed by the Borrower and Holdco, and by the Majority Lenders;

                      (b)  the  Arrangers'  receipt  of,  with  respect  to  the
              AirTouch   Acquisition,   updated  Projections  for  the  Borrower
              demonstrating   the  Borrower's  pro  forma  compliance  with  the
              Financial Covenants after giving effect thereto; and

                      (c) the  representations  and warranties of Holdco and the
              Borrower  set forth in the Credit  Agreement  and this  Amendment,
              other than those that are  expressly  made as of a specific  date,
              are true and correct in all material respects with the same effect
              as though such representations and warranties had been made on and
              as of the Effective Date.

10.  Representations  and  Warranties.  Each of the Borrower  and Holdco,  for
itself  and on  behalf  of  each of its  Subsidiaries,  agrees,  represents  and
warrants in favor of the Arrangers,  the Syndication  Agent, the  Administrative
Agent, the Collateral Agent and the Credit Parties that:

(a)           This Amendment has been executed and delivered by duly  authorized
              representatives  of  the  Borrower  and  Holdco,  and  the  Credit
              Agreement, as modified and amended by this Amendment,  constitutes
              a legal,  valid and binding  obligation of the Borrower and Holdco
              and is  enforceable  against the Borrower and Holdco in accordance
              with  its  terms,  except  as  enforceability  may be  limited  by
              bankruptcy,  insolvency,  reorganization or similar laws affecting
              creditors'  rights  generally  and by the  application  of general
              equitable principles;

(b)           Before and after giving effect to this  Amendment,  no Default or
              Event of Default with respect to the Borrower or Holdco has
              occurred and is continuing;

(c)           As of the date  hereof  and  after  giving  effect  to each of the
              AirTouch  Acquisition  and  the  Nextel  2  Acquisition,  (i)  the
              property of the Borrower,  at a fair  valuation on a going concern
              basis, will exceed its debt; (ii) the capital of the Borrower will
              not be unreasonably  small to conduct its business;  and (iii) the
              Borrower will not have incurred  debts,  or have intended to incur
              debts, beyond its ability to pay such debts as they mature;

                                       7
<PAGE>   8





(d)           No event  contemplated  in  connection  with  either the  AirTouch
              Acquisition or the Nextel 2 Acquisition shall occur, which has not
              been consented to or waived,  the occurrence of which constitutes,
              or with the  passage  of time or giving  of  notice or both  would
              constitute,  a material default by Holdco,  the Borrower or any of
              their  respective   Subsidiaries  under  any  material  indenture,
              agreement or other instrument,  including, without limitation, the
              material  Necessary  Authorizations  and  the  Indentures,  or any
              judgment, decree or order, to which Holdco, the Borrower or any of
              their respective  Subsidiaries is a party or by which Holdco,  the
              Borrower or any of their  respective  Subsidiaries or any of their
              respective properties may be bound or affected; and

(e)           All of the  representations  and  warranties  of  Holdco  and  the
              Borrower   contained   in  the  Credit   Agreement   (other   than
              representations  and warranties  that relate solely to a specified
              date) continue to be true and correct in all material  respects as
              of the date hereof as though made on and as of such date.

11.    Counterparts.  This  Amendment  may be executed in any number of separate
counterparts and by the different parties hereto on separate counterparts,  each
of which shall be deemed an original and all of which, taken together,  shall be
deemed to constitute one and the same  instrument.  In proving this Amendment in
any  judicial  proceedings,  it shall not be necessary to produce or account for
more than one such counterpart signed by the party against whom such enforcement
is sought. Any signatures  delivered by a party by facsimile  transmission shall
be deemed an original signature hereto.

12.   Law of Contract.  THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND
GOVERNED BY THE INTERNAL  LAWS OF THE STATE OF NEW YORK  APPLICABLE TO CONTRACTS
MADE AND TO BE PERFORMED WHOLLY WITHIN SUCH STATE.



                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]


                                       8




<PAGE>   9







                                  SCHEDULE 1.1


The AirTouch  Purchase  Documents  shall  include the  following  documents,  as
amended,  and all  schedules  and  exhibits  thereto and  documents  executed in
connection therewith:

1.       AGREEMENT  TO  SUBLEASE  dated as of  February  16, 2000 by and between
         AirTouch Communications, Inc., a Delaware corporation, Los Angeles SMSA
         Limited     Partnership,     a    California    limited    partnership,
         Oxnard-Ventura-Simi   Limited   Partnership,   a   California   limited
         partnership, as Sublessors, Holdco, and California Tower.

2.       SUBLEASE   dated   as   of   ____________,   2000,   between   AirTouch
         Communications,  Inc., a Delaware corporation,  The Other Parties Named
         Therein as Sublessors,  and California  Tower,  and for purposes of the
         guaranty set forth in Section  26(e) thereof and the covenant set forth
         in Section 26(h) thereof, Holdco (the "Sublease").

3.       SITE  DEVELOPMENT AND  BUILD-TO-SUIT  AGREEMENT dated as of __________,
         2000  by  and  between  AirTouch   Communications,   Inc.,  a  Delaware
         corporation,  ("AirTouch")  and  California  Tower for  purposes of the
         Guaranty   set  forth  in  Section   10.2(c)   thereof,   Holdco   (the
         "Build-To-Suit Agreement").

4.       MASTER TOWER SITE LEASE  AGREEMENT dated as of  ____________,  2000, by
         and between AirTouch Communications, Inc. and California Tower, and for
         purposes of the guaranty set forth in Section 19.D. thereof Holdco (the
         "Master Tower Site Lease").

5.       SITE  MARKETING  AGREEMENT  dated as of February 16, 2000,  between (i)
         AirTouch  Communications,  Inc. and the other entities listed under the
         heading  "Owner" on the signature  pages thereto,  and (ii)  California
         Tower,  and (iii) solely for purpose of Section 24 thereof  Holdco (the
         "Site Marketing Agreement").

6.       ESCROW  AGREEMENT  dated as of February 16, 2000, by and among Airtouch
         Communications,  Inc., a Delaware corporation,  the entities other than
         Air  Touch  which are  listed  under the  heading  "Sublessors"  on the
         signature  pages  thereto,  California  Tower and First Union  National
         Bank, as escrow agent (the "Escrow Agreement")


<PAGE>   10



THIRD AMENDMENT (SPECTRASITE COMMUNICATIONS, INC.)
         IN WITNESS WHEREOF, this Amendment has been duly executed as of the day
and year first written above.

BORROWER:                                       SPECTRASITE COMMUNICATIONS, INC.


                                                By:      /s/  David P. Tomick
                                                         -----------------------
                                                Name:         David P. Tomick
                                                Title:  Executive Vice President



                                                Attest:
                                                Name:
                                                Title:


HOLDCO:                                         SPECTRASITE HOLDINGS, INC.


                                                By:     /s/ David P. Tomick
                                                        ------------------------
                                                Name:       David P. Tomick
                                                Title:  Executive Vice President



                                                Attest:
                                                Name:
                                                Title:





<PAGE>   11



ADMINISTRATIVE                      CANADIAN IMPERIAL BANK OF
AGENT:                                           COMMERCE


                                                By:     /s/ Colleen Risorto
                                                        ------------------------
                                                Name:   Colleen Risorto
                                                Title:  Executive Director
                                              CIBC World Markets Corp. as Agent





<PAGE>   12



ARRANGERS:                          CIBC WORLD MARKETS CORP.
                                                 (f/k/a CIBC Oppenheimer Corp.)

                                                By:     /s/ Colleen Risorto
                                                        ------------------------
                                                Name:   Colleen Risorto
                                                Title:  Executive Director
                                               CIBC World Markets Corp. as Agent


                                                     CREDIT SUISSE FIRST BOSTON


                                               By:     /s/ Bill O'Daly
                                                       -------------------------
                                               Name:   Bill O'Daly
Title:    Vice President

                                               By:     /s/ Robert Hetu
                                                       -------------------------
                                               Name:   Robert Hetu
                                               Title:  Vice President





<PAGE>   13



COLLATERAL AGENT:          CANADIAN IMPERIAL BANK OF COMMERCE


                                               By:     /s/  Colleen Risorto
                                                       -------------------------
                                               Name:   Colleen Risorto
                                               Title:  Executive Director
                                               CIBC World Markets Corp. as Agent





<PAGE>   14



SYNDICATION AGENT:                          CREDIT SUISSE FIRST BOSTON


                                               By:     /s/ Bill O'Daly
                                                       -------------------------
                                               Name:   Bill O'Daly
Title:    Vice President

                                               By:     /s/ Robert Hetu
                                                       -------------------------
                                               Name:   Robert Hetu
                                               Title:  Vice President




<PAGE>   15



MANAGING AGENTS:                    BANK OF MONTREAL, CHICAGO BRANCH


                                               By:     /s/ Karen Klapper
                                                       -------------------------
                                               Name:       Karen Klapper
                                               Title:    Director


                             THE BANK OF NOVA SCOTIA

                                              By: /s/ Vincent J. Fitzgerald, Jr.
                                                  ------------------------------
                                              Name:   Vincent J. Fitzgerald, Jr.
                                              Title:       Authorized Signatory


                            FLEET NATIONAL BANK (f/k/a BankBoston, N.A.)


                                              By:     /s/ Shepard D. Rainie
                                                      --------------------------
                                              Name:      Shephard D. Rainie
                                              Title:        Managing Director


                            DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN BRANCHES


                                              By:     /s/ Patrick A. Keleher
                                                      --------------------------
                                              Name:      Patrick A. Keleher
                                              Title:        Vice President


                                              By:     /s/ Brian E. Haughney
                                                      --------------------------
                                              Name:      Brian E. Haughney
                                              Title:    Assistant Vice President


                                                  TORONTO DOMINION (TEXAS), INC.

                                              By:     /s/ Ann S. Slanis
                                                      --------------------------
                                              Name:       Ann S. Slanis
                                              Title:    Vice President

                                                  UNION BANK OF CALIFORNIA, N.A.


                                              By:
                                              Name:
                                              Title:





<PAGE>   16



CO-AGENT:                                      CREDIT LYONNAIS NEW YORK BRANCH


                                              By:     /s/  Mark A. Campellone
                                                      --------------------------
                                              Name:  Mark A. Campellone
                                              Title:    First Vice President





<PAGE>   17



LENDERS:                   CIBC INC.


                                              By:     /s/  Colleen Risorto
                                                      --------------------------
                                              Name:         Colleen Risorto
                                              Title:        Executive Director
                                               CIBC World Markets Corp. as Agent






<PAGE>   18



                                                   CREDIT SUISSE FIRST BOSTON


                                              By:     /s/ Bill O'Daly
                                                      --------------------------
                                              Name:   Bill O'Daly
                                              Title:    Vice President

                                              By:     /s/ Robert Hetu
                                                      --------------------------
                                              Name:   Robert Hetu
                                              Title:    Vice President





<PAGE>   19



                                               BANK OF MONTREAL, CHICAGO BRANCH


                                             By:     /s/  Karen Klapper
                                                     ---------------------------
                                             Name: Karen Klapper
                                             Title:    Director




<PAGE>   20



                             THE BANK OF NOVA SCOTIA


                                             By:  /s/ Vincent J. Fitzgerald, Jr.
                                                  ------------------------------
                                             Name:    Vincent J. Fitzgerald, Jr.
                                             Title:         Authorized Signatory





<PAGE>   21



                                    FLEET NATIONAL BANK (f/k/a BankBoston, N.A.)


                                             By:     /s/  Shepard D. Rainie
                                                     ---------------------------
                                             Name:       Shepard D. Rainie
                                             Title:        Managing Director




<PAGE>   22



                            DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN BRANCHES


                                            By:     /s/  Patrick A. Keleher
                                                    ----------------------------
                                            Name:       Patrick A. Keleher
                                            Title:       Vice President


                                            By:     /s/  Brian E. Haughney
                                                    ----------------------------
                                            Name:        Brian E. Haughney
                                            Title:      Assistant Vice President




<PAGE>   23



                                              TORONTO DOMINION (TEXAS), INC.


                                            By:     /s/ Ann S. Slanis
                                                    ----------------------------
                                            Name:    Ann S. Slanis
                                            Title:   Vice President





<PAGE>   24



                                               UNION BANK OF CALIFORNIA, N.A.


                                            By:     /s/  Peter C. Connoy
                                                    ----------------------------
                                            Name:       Peter C. Connoy
                                            Title:         Vice President





<PAGE>   25



                                                 CREDIT LYONNAIS NEW YORK BRANCH


                                            By:     /s./ Mark A. Campellone
                                                    ----------------------------
                                            Name:  Mark A. Campellone
                                            Title:    First Vice President





<PAGE>   26



                              THE BANK OF NEW YORK


                                            By:     /s/  Gerry Granovsky
                                                    ----------------------------
                                            Name:        Gerry Granovsky
                                            Title:       Vice President





<PAGE>   27



                                          CAISSE DE DEPOT ET PLACEMENT DU QUEBEC


                                            By:     /s/  Louis Lavoie
                                                    ----------------------------
                                            Name:         Louis Lavoie
                                            Title:          Manager


                                            By:     /s/ Lucie Rousseau
                                                    ----------------------------
                                            Name:      Lucie Rousseau
                                            Title:        Vice President




<PAGE>   28



                                             CANADIAN IMPERIAL BANK OF COMMERCE


                                            By:     /s/  Colleen Risorto
                                                    ----------------------------
                                            Name:         Colleen Risorto
                                            Title:         Executive Director
                                              CIBC World Markets Corp. as Agent




<PAGE>   29



                                    THE CIT GROUP/EQUIPMENT FINANCING, INC.


                                            By:       /s/ J. E. Palmer
                                                      --------------------------
                                            Name:        J. E. Palmer
                                            Title:    Assistant Vice President





<PAGE>   30



                                               CYPRESSTREE INVESTMENT FUND, LLC

                                            By:   CypressTree Investment
                                                  Management Company, Inc., its
                                                  Managing Member


                                            By:      /s/  Susan Lee
                                                     ---------------------------
                                            Name:        Susan Lee
                                            Title:          Authorized Agent





<PAGE>   31



                                        NORTHAMERICAN SENIOR FLOATING RATE FUND

                                            By:     CypressTree Investment
                                                    Management Company, Inc.,
                                                    its Managing Member


                                            By:
                                            Name:
                                            Title:




<PAGE>   32



                                 CYPRESSTREE INVESTMENT MANAGEMENT COMPANY, INC.

                                As:     Attorney-in-Fact and on behalf of First
                                        Allmerica Financial Life Insurance
                                        Company as Portfolio Manager


                                            By:
                                            Name:
                                            Title:





<PAGE>   33



                              KZH CYPRESSTREE-1 LLC


                                            By:
                                            Name:
                                            Title:





<PAGE>   34



                                             FREMONT INVESTMENT & LOAN


                                            By:
                                            Name:
                                            Title:





<PAGE>   35



                             HELLER FINANCIAL, INC.


                                            By:
                                            Name:
                                            Title:





<PAGE>   36



                                    MERRILL LYNCH SENIOR FLOATING RATE FUND, INC


                                           By:     /s/  Joseph Matteo
                                                   -----------------------------
                                           Name:       Joseph Matteo
                                           Title:       Authorized Signatory





<PAGE>   37



                          PPM AMERICA, INC., as attorney in fact, on behalf of
                          Jackson National Life Insurance Company


                                           By:
                                           Name:
                                           Title:





<PAGE>   38



                         Fleet National Bank (f/k/a BankBoston, N.A.), as Trust
                         Administrator for LONGLANE MASTER TRUST IV


                                            By:
                                            Name:
                                            Title:





<PAGE>   39



                             GALAXY CLO 1999-1, LTD.

                                            By:    SAI Investment Advisor, Inc.,
                                                   its Collateral Manager


                                            By:
                                            Name:
                                            Title:





<PAGE>   40



                                                  OXFORD STRATEGIC INCOME FUND

                                            By:     Eaton Vance Management, as
                                                    Investment Advisor


                                            By:     /s/ Payson F. Swaffield
                                                    ----------------------------
                                            Name:      Payson F. Swaffield
                                            Title:        Vice President





<PAGE>   41



                              SENIOR DEBT PORTFOLIO

                   By:     Boston Management and Research, as Investment Advisor


                                            By:     /s/ Payson F. Swaffield
                                                    ----------------------------
                                            Name:      Payson F. Swaffield
                                            Title:        Vice President





<PAGE>   42



                                        J.H. WHITNEY MARKET VALUE FUND, L.P.

                        By:     J.H. Whitney Value GP, Ltd., its General Partner


                                            By:
                                            Name:
                                            Title:





<PAGE>   43



                                               J.H. WHITNEY MEZZANINE FUND, L.P.

                                By:           Whitney GP, Ltd. - General Partner
                                              ----------------------------------

                                            By:
                                            Name:
                                            Title:





<PAGE>   44



                              BANK OF AMERICA, N.A.


                                            By:
                                            Name:
                                            Title:





<PAGE>   45



                                                 DEBT STRATEGIES FUND II, INC.


                                            By:     /s/ Joseph Matteo
                                                    ----------------------------
                                            Name:        Joseph Matteo
                                            Title:       Authorized Signatory




<PAGE>   46



                                                 DEBT STRATEGIES FUND III, INC.


                                            By:     /s/  Joseph Matteo
                                                    ----------------------------
                                            Name:        Joseph Matteo
                                            Title:       Authorized Signatory





<PAGE>   47



                                         THE FUJI BANK, LIMITED, NEW YORK BRANCH


                                            By:
                                            Name:
                                            Title:





<PAGE>   48



                                                 VAN KAMPEN SENIOR INCOME TRUST


                                            By:
                                            Name:
                                            Title:





<PAGE>   49



                                                  PROSPECT INTERNATIONAL DEBT
                                                  STRATEGY FUND


                                            By:
                                            Name:
                                            Title:





<PAGE>   50



                                              CARAVELLE INVESTMENT FUND L.L.C.


                                            By:
                                            Name:
                                            Title:




<PAGE>   51



                                    EATON VANCE SENIOR INCOME TRUST


                                            By:     /s/ Payson F. Swaffield
                                                    ----------------------------
                                            Name:      Payson F. Swaffield
                                            Title:        Vice President




<PAGE>   52



                                MERRILL LYNCH SENIOR FLOATING RATE FUND II, INC.


                                            By:     /s/  Joseph Matteo
                                                    ----------------------------
                                            Name:         Joseph Matteo
                                            Title:        Authorized Signatory




<PAGE>   53



                                   MORGAN STANLEY DEAN WITTER PRIME INCOME TRUST


                                            By:
                                            Name:
                                            Title:




<PAGE>   54



                                    ELC "Cayman" Ltd. 1999-III


                                            By:
                                            Name:
                                            Title:




<PAGE>   55



                                    SAWGRASS TRADING LLC


                                            By:     /s/ Kelly C. Walker
                                                    ----------------------------
                                            Name:       Kelly C. Walker
                                            Title:         Vice President




<PAGE>   56



                                    BANC OF AMERICA SECURITIES LLC


                                            By:
                                            Name:
                                            Title:




<PAGE>   57



                                    FIRST DOMINION FUNDING III


                                            By:
                                            Name:
                                            Title:

<PAGE>   1
                                                                    EXHIBIT 21.1

                         SUBSIDIARIES OF THE REGISTRANT

1.   SpectraSite Communications, Inc. ("SCI"), a Delaware corporation and wholly
     owned subsidiary of the Registrant.

2.   Tower Merger Vehicle, Inc. ("TMV"), a Delaware corporation and wholly owned
     subsidiary of SCI.

3.   Tower Asset Sub, Inc., a Delaware corporation and wholly owned subsidiary
     of TMV.

4.   Vertical Properties, Inc., a New York corporation and wholly owned
     subsidiary of SCI.

5.   Stainless, Inc., a Pennsylvania corporation and wholly owned subsidiary of
     SCI.

6.   Doty-Moore Tower Services, Inc., a Texas corporation and wholly owned
     subsidiary of SCI.

7.   Doty-Moore Equipment, Inc., a Texas corporation and wholly owned subsidiary
     of SCI.

8.   Doty Moore RF Services, Inc., a Texas corporation and wholly owned
     subsidiary of SCI.

9.   SpectraSite Broadcast Technical Services, Inc., a Delaware corporation and
     wholly owned subsidiary of SCI.

10.  SpectraSite Broadcast Fabrication, Inc., a Delaware corporation and wholly
     owned subsidiary of SCI.

11.  SpectraSite Broadcast Towers, Inc., a Delaware corporation and wholly owned
     subsidiary of SCI.

12.  SpectraSite Communications Limited, a corporation and wholly owned
     subsidiary of SCI.

13.  California Tower, Inc., a Delaware corporation and wholly owned subsidiary
     of SCI.

14.  Apex Site Management Holdings, Inc. ("Apex Holdings"), a Delaware
     corporation and wholly owned subsidiary of SCI.

15.  Apex Site Management, Inc. ("Apex"), a Delaware corporation and wholly
     owned subsidiary of Apex Holdings.

16.  Metrosite Management, LLC, an Arkansas limited liability company and wholly
     owned subsidiary of Apex.

17.  Vertical Realty, LLC, a Delaware limited liability company and wholly owned
     subsidiary of Apex.

18.  Apex Construction Services LLC, a Delaware limited liability company and
     wholly owned subsidiary of Apex Holdings.

<PAGE>   2

19.  Apex Site Management - Canada, Inc., a Delaware corporation and wholly
     owned subsidiary of Apex.

20.  Westower Corporation ("Westower"), a Washington corporation and wholly
     owned subsidiary of SCI.

21.  SpectraSite Construction, Inc., a Delaware corporation and wholly owned
     subsidiary of Westower.

22.  CNG Communications, Inc., a Delaware corporation and wholly owned
     subsidiary of Westower.

23.  Westower Communications, Inc., a Texas Coroporation and a wholly owned
     subsidiary of Westower.

24.  Teletronics Management Services, Inc., a Washington corporation and wholly
     owned subsidiary of Westower.

25.  Teletronics Realty Services, Inc., a Washington corporation and wholly
     owned subsidiary of Westower.

26.  Westower Design, Inc., a Florida corporation and wholly owned subsidiary of
     Westower.

27.  Westower Leasing, Inc., a Wyoming corporation and wholly owned subsidiary
     of Westower.

28.  Westower Communications Ltd., a Canadian Federal corporation and wholly
     owned subsidiary of Westower.

29.  Westower Leasing Canada Inc., a Canadian Federal corporation and wholly
     owned subsidiary of Westower.

30.  Westower Acquisitions Canada, Inc. ("Acquisitions"), a Canadian Federal
     corporation and wholly owned subsidiary of Westower.

31.  Acier Filteau Inc., a Province Quebec corporation and wholly owned
     subsidiary of Acquisitions.

32.  Jovin Telecommunications, Inc., a Canadian Federal corporation and wholly
     owned subsidiary of Acquisitions.

33.  Telecommunication R. David Inc., a Province Quebec corporation and wholly
     owned subsidiary of Acquisitions.



<PAGE>   1
                                                                    EXHIBIT 23.1

                        CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in the Registration Statement (Form
S-8 No. 333-86291) pertaining to the Stock Incentive Plan of SpectraSite
Holdings, Inc. of our report dated February 14, 2000, with respect to the
consolidated financial statements of SpectraSite Holdings, Inc. included in the
Annual Report (Form 10-K) for the year ended December 31, 1999.


                                                           /s/ Ernst & Young LLP

Raleigh, North Carolina
March 2, 2000

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                          37,778
<SECURITIES>                                         0
<RECEIVABLES>                                   33,315
<ALLOWANCES>                                     1,530
<INVENTORY>                                      4,083
<CURRENT-ASSETS>                                89,544
<PP&E>                                         796,594
<DEPRECIATION>                                  32,837
<TOTAL-ASSETS>                               1,219,953
<CURRENT-LIABILITIES>                           43,419
<BONDS>                                        718,778
                                0
                                    339,494
<COMMON>                                            20
<OTHER-SE>                                     118,242
<TOTAL-LIABILITY-AND-EQUITY>                 1,219,953
<SALES>                                              0
<TOTAL-REVENUES>                               100,085
<CGS>                                                0
<TOTAL-COSTS>                                   54,314
<OTHER-EXPENSES>                                83,885
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              67,513
<INCOME-PRETAX>                               (97,100)
<INCOME-TAX>                                       568
<INCOME-CONTINUING>                           (97,668)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (97,668)
<EPS-BASIC>                                    (12.48)
<EPS-DILUTED>                                  (12.48)


</TABLE>

<PAGE>   1
                                                                    EXHIBIT 99.1



                       UNAUDITED PRO FORMA FINANCIAL DATA

GENERAL

     The unaudited pro forma financial data are based on the historical
financial statements of SpectraSite and Westower Corporation and the adjustments
described in the accompanying notes. The unaudited pro forma financial data do
not purport to represent what SpectraSite's, Westower's or the combined entity's
financial position or results of operations would actually have been if the
transactions had in fact occurred on the dates indicated and are not necessarily
representative of SpectraSite's financial position or results of operations at
any future date or for any future period. The unaudited pro forma consolidated
financial data should be read in conjunction with "Selected Historical Financial
Data," "Management's Discussion and Analysis of Financial Condition and Results
of Operations," and the consolidated financial statements and related notes
thereto included in SpectraSite's Form 10-K for the year ended December 31,
1999.

SPECTRASITE

     The following unaudited pro forma consolidated financial data present both
the pre-merger and post-merger unaudited pro forma consolidated statements of
operations of SpectraSite for the year ended December 31, 1999. The SpectraSite
pro forma column and the Westower pro forma column presented in the post-merger
SpectraSite unaudited pro forma consolidated statement of operations for the
year ended December 31, 1999 are derived from the pre-merger SpectraSite and
Westower pro forma consolidated statements of operations for the corresponding
periods. The unaudited pro forma consolidated statement of operations data give
effect to the following transactions as if they had occurred on January 1, 1999:

      --   the acquisition of 2,000 communications towers from Nextel, the
           leaseback of antenna space by Nextel and SpectraSite's exclusive
           agreement to acquire or construct 1,700 additional sites for Nextel;

      --   the issuance and sale of SpectraSite Holdings' 11 1/4% senior
           discount notes due 2009;

      --   initial borrowings under SpectraSite's credit facility; and

      --   the consummation of the Westower merger.

     Certain of the data presented in the "Nextel" column to the unaudited pro
forma statement of operations of SpectraSite are estimates provided by Nextel.
None of SpectraSite's independent accountants, Nextel's independent accountants
or Westower's independent accountants have audited or otherwise tested this
data.

     The acquisition of tower assets from Nextel and the leaseback of antenna
space by Nextel are presented as if the purchase of assets had occurred on
January 1, 1999. Adjustments for revenues are based on the terms of the master
site lease agreement and on historical co-location revenues. Adjustments for
costs of operations consist of direct operating expenses, which include ground
lease payments, historical routine maintenance costs and property taxes
associated with the towers. Depreciation expense is straight-line depreciation
of the aggregate cost of the towers. Ground leases are non-cancelable operating
leases, generally for terms of five years and include options for renewal, and
pro forma ground lease expense is based on executed ground leases. Nextel has
leased space on each of the 2,000 towers we acquired, primarily for five-year
terms with options for renewal.


                                      E-1
<PAGE>   2

     The pro forma minimum ground lease expenses and minimum rental income for
these leases assuming the Nextel transaction occurred and the related leases
commenced January 1, 1999 are as follows:

<TABLE>
<CAPTION>
                                       GROUND LEASE     RENTAL
                                         EXPENSE        INCOME
                                       ------------    --------
                                            (IN THOUSANDS)
<S>                                    <C>             <C>
1999...............................      $17,648       $ 40,766
2000...............................       17,648         40,766
2001...............................       17,648         40,766
2002...............................       17,648         40,766
2003...............................       17,648         40,766
                                         -------       --------
  Total............................      $88,240       $203,830
                                         =======       ========
</TABLE>

WESTOWER

     The following unaudited pro forma consolidated financial data of Westower
present the unaudited pro forma consolidated statement of operations of Westower
for the period from January 1, 1999 through September 2, 1999, the date on which
SpectraSite acquired Westower.

     This statement gives effect to the acquisition of communications towers
from Koch Industries, Inc. and its affiliates, which occurred in February 1999,
as if this acquisition occurred on January 1, 1999. In addition to the above
acquisition, from January 1 through September 2, 1999, Westower acquired Cypress
Real Estate Services, Inc. and Telecommunications R. David. These acquisitions,
which are included in the historical financial statements of Westower, were not
considered significant transactions, individually or in the aggregate, and
therefore, were not included in the unaudited pro forma consolidated statement
of operations of Westower.

     Adjustments for revenues are based on the executed tenant lease terms for
the Koch towers. Adjustments for costs of operations consist of direct operating
expenses, which include ground lease payments, estimated routine maintenance
costs, property taxes and insurance associated with the towers. Depreciation
expense is straight-line depreciation of the aggregate cost of $17.0 million.
The Koch ground leases are non-cancelable operating leases for a term of 49
years, and pro forma ground lease expense is based on executed ground leases.
Koch has leased space on these towers for a ten-year term with options for
renewal. The pro forma minimum ground lease expense and minimum rental income
for these leases assuming the transaction occurred and the related leases
commenced January 1, 1999 are as follows:

<TABLE>
<CAPTION>
                                        GROUND LEASE    RENTAL
                                          EXPENSE       INCOME
                                        ------------    -------
                                            (IN THOUSANDS)
<S>                                     <C>             <C>
1999................................      $   439       $ 1,364
2000................................          439         1,364
2001................................          439         1,364
2002................................          439         1,364
2003................................          439         1,364
Thereafter..........................       19,322         6,824
                                          -------       -------
  Total.............................      $21,517       $13,644
                                          =======       =======
</TABLE>


                                      E-2
<PAGE>   3

                     PRE-MERGER SPECTRASITE HOLDINGS, INC.

            UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1999

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                                    PRE-MERGER
                                                                                    SPECTRASITE
                                                          HISTORICAL     NEXTEL      PRO FORMA
                                                          ----------    --------    -----------
<S>                                                       <C>           <C>         <C>
Revenues:
  Site leasing........................................     $ 46,515     $ 14,954(a)  $  61,469
  Network services....................................       53,570           --        53,570
                                                           --------     --------     ---------
Total revenues........................................      100,085       14,954       115,039
                                                           --------     --------     ---------
Operating expenses:
  Costs of operations:
     Site leasing.....................................       17,825        6,913(b)     24,738
     Network services.................................       36,489           --        36,489
  Selling, general and administrative expenses........       38,182           --(c)     38,182
  Depreciation and amortization.......................       37,976       11,808(d)     49,784
  Restructuring and non-recurring charges.............        7,727           --         7,727
                                                           --------     --------     ---------
Total operating expenses..............................      138,199       18,721       156,920
                                                           --------     --------     ---------
Operating loss........................................      (38,114)      (3,767)      (41,881)
                                                           --------     --------     ---------
Other income (expense):
  Interest income.....................................        8,951           --         8,951
  Interest expense....................................      (67,513)     (20,554)(e)   (88,067)
  Other income (expense)..............................         (424)          --          (424)
                                                           --------     --------     ---------
     Total other income (expense).....................      (58,986)     (20,554)      (79,540)
                                                           --------     --------     ---------
Loss before income taxes..............................      (97,100)     (24,321)     (121,421)
Income tax expense....................................          568           --           568
                                                           --------     --------     ---------
Net loss..............................................     $(97,668)    $(24,321)    $(121,989)
                                                           ========     ========     =========

Net loss..............................................     $(97,668)
Accretion of redemption value of preferred stock......         (760)
                                                           --------
Net loss applicable to common shareholders............     $(98,428)
                                                           ========
Net loss per share:
     Basic and diluted................................     $ (12.48)
                                                           ========
Weighted average number of shares of common stock
  outstanding:
     Basic and diluted................................        7,886
                                                           ========
</TABLE>

    See accompanying notes to unaudited pro forma consolidated statement of
                                  operations.


                                      E-3
<PAGE>   4

                     PRE-MERGER SPECTRASITE HOLDINGS, INC.
       NOTES TO UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1999
                                 (IN THOUSANDS)

          (a)  Consists of $2,611 of historical co-location revenues received by
     Nextel prior to the acquisition, which are based on fixed payment lease
     terms. This information was provided to us by Nextel. Also consists of
     $12,343 of additional revenues to be recognized by SpectraSite under the
     terms of the Nextel master site lease agreement.

          (b)  Reflects certain direct operating expenses, primarily the cost of
     executed ground leases, historical routine maintenance and property taxes
     associated with the towers, paid by Nextel prior to the acquisition.

          (c)  SpectraSite has incurred incremental operating expenses as a
     result of the Nextel tower acquisition. Such incremental expenses are
     estimated to have been approximately $1,500 per month. These incremental
     operating expenses are based upon management's estimates rather than on any
     contractual obligation; as such, these amounts have not been presented as
     adjustments in the accompanying pro forma financial statements.

          (d)  Reflects the depreciation of the acquired towers calculated on a
     straight-line basis over 15 years.

          (e)  Reflects adjustment to interest expense as if SpectraSite had
     issued its 11 1/4% senior discount notes due 2009 and had entered into the
     credit facility on January 1, 1999 as follows:

<TABLE>
<S>                                                     <C>
PRO FORMA INTEREST EXPENSE:
Interest on 2009 notes at 11 1/4%...................    $13,794
Interest on $150,000 term loan......................      3,964
Amortization of debt issuance costs.................      1,626
Commitment fees on unused portion of credit
  facility..........................................      1,170
                                                        -------
Total adjustment....................................    $20,554
                                                        =======
</TABLE>

                                      E-4
<PAGE>   5

                     WESTOWER CORPORATION AND SUBSIDIARIES

            UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
         FOR THE PERIOD FROM JANUARY 1, 1999 THROUGH SEPTEMBER 2, 1999

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                       HISTORICAL       KOCH        WESTOWER
                                                        WESTOWER     ADJUSTMENTS    PRO FORMA
                                                       ----------    -----------    ---------
<S>                                                    <C>           <C>            <C>
Revenues:
  Site leasing.....................................     $ 1,649         $ 227(a)     $ 1,876
  Network services.................................      62,002            --         62,002
                                                        -------         -----        -------
  Total revenues...................................      63,651           227         63,878
                                                        -------         -----        -------
Operating expenses:
  Costs of operations:
     Site leasing..................................         928           123(b)       1,051
     Network services..............................      43,943            --         43,943
  Selling, general and administrative expenses.....      18,439            --         18,439
  Depreciation and amortization....................       2,920           142(c)       3,062
  Restructuring and non-recurring charges..........       4,629            --          4,629
                                                        -------         -----        -------
Total operating expenses...........................      70,859           265         71,124
                                                        -------         -----        -------
Operating loss.....................................      (7,208)          (38)        (7,246)
                                                        -------         -----        -------
Other income (expense):
  Interest income..................................         151            --            151
  Interest expense.................................      (2,317)         (213)(d)     (2,530)
  Other income (expense)...........................         154            --            154
                                                        -------         -----        -------
     Total other income (expense)..................      (2,012)         (213)        (2,225)
                                                        -------         -----        -------
Loss before income taxes...........................      (9,220)         (251)        (9,471)
Income tax expense.................................         223          (100)(e)        123
                                                        -------         -----        -------
Net loss...........................................     $(9,443)        $(151)       $(9,594)
                                                        =======         =====        =======
Net loss per share:
  Basic and diluted................................     $ (1.10)
                                                        =======
Weighted average number of shares of common stock
  outstanding:
  Basic and diluted................................       8,562
                                                        =======
</TABLE>

    See accompanying notes to unaudited pro forma consolidated statement of
                                  operations.


                                      E-5
<PAGE>   6

                     WESTOWER CORPORATION AND SUBSIDIARIES

       NOTES TO UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
         FOR THE PERIOD FROM JANUARY 1, 1999 THROUGH SEPTEMBER 2, 1999

     (a)  Consists of additional revenues to be recognized by Westower in
connection with site lease agreements with Koch.

     (b)  Reflects certain direct operating expenses, primarily the cost of
executed ground leases, estimated routine maintenance, property taxes and
insurance associated with the towers.

     (c)  Reflects the depreciation of the acquired towers from Koch calculated
on a straight-line basis over 20 years.

     (d)  Reflects adjustment to interest expense related to additional
borrowings under Westower's credit facility to acquire the Koch towers, based on
the credit facility's approximate interest rate of 7.5%.

     (e)  Reflects income tax benefit for the Koch tower operating results at
Westower's estimated tax rate of 40%.


                                      E-6
<PAGE>   7

                     POST-MERGER SPECTRASITE HOLDINGS, INC.

            UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1999

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                                  POST-MERGER
                                       SPECTRASITE    WESTOWER       MERGER       SPECTRASITE
                                        PRO FORMA     PRO FORMA    ADJUSTMENTS     PRO FORMA
                                       -----------    ---------    -----------    -----------
<S>                                    <C>            <C>          <C>            <C>
Revenues:
  Site leasing.....................     $  61,469      $ 1,876       $    --       $  63,345
  Network services.................        53,570       62,002        (1,449)(a)     114,123
                                        ---------      -------       -------       ---------
Total revenues.....................       115,039       63,878        (1,449)        177,468
                                        ---------      -------       -------       ---------
Operating expenses:
  Costs of operations:
     Site leasing..................        24,738        1,051            --          25,789
     Network services..............        36,489       43,943        (1,014)(a)      79,418
  Selling, general and
     administrative expenses.......        38,182       18,439            --          56,621
  Depreciation and amortization....        49,784        3,062         9,577(b)       61,972
                                                                        (451)(c)
  Restructuring and non-recurring
     charges.......................         7,727        4,629        (4,629)(d)       7,727
                                        ---------      -------       -------       ---------
Total operating expenses...........       156,920       71,124         3,483         231,527
                                        ---------      -------       -------       ---------
Operating loss.....................       (41,881)      (7,246)       (4,932)        (54,059)
                                        ---------      -------       -------       ---------
Other income (expense):
  Interest income..................         8,951          151        (1,466)(e)       7,636
  Interest expense.................       (88,067)      (2,530)        2,052(f)      (88,545)
  Other income (expense)...........          (424)         154            --            (270)
                                        ---------      -------       -------       ---------
     Total other income
       (expense)...................       (79,540)      (2,225)          586         (81,179)
                                        ---------      -------       -------       ---------
Loss before income taxes...........      (121,421)      (9,471)       (4,346)       (135,238)
Income tax expense.................           568          123            --             691
                                        ---------      -------       -------       ---------
Net loss...........................     $(121,989)     $(9,594)      $(4,346)      $(135,929)
                                        =========      =======       =======       =========
Net loss per share:
  Basic and diluted................                                                $    6.73(g)
                                                                                   =========
Weighted average number of shares
  of common stock outstanding:
  Basic and diluted................                                                   20,192
                                                                                   =========
</TABLE>

    See accompanying notes to unaudited pro forma consolidated statement of
                                  operations.



                                      E-7
<PAGE>   8

                     POST-MERGER SPECTRASITE HOLDINGS, INC.
       NOTES TO UNAUDITED PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1999
                                 (IN THOUSANDS)

     (a)  Reflects the elimination of intercompany site construction revenues
and costs of site construction for towers built by Westower for SpectraSite
during the period from January 1 through September 2, 1999.

     (b)  Reflects amortization of goodwill as if the merger of Westower and
SpectraSite had occurred on January 1, 1999. Goodwill is amortized over 15
years.

     (c)  Reflects adjustments to eliminate amortization of historical goodwill
of Westower of $1,062 and to convert Westower tower depreciation from 20 years
to 15 years, increasing expense by $611.

     (d)  Reflects the elimination of certain non-recurring charges resulting
directly from the transaction which were incurred by Westower prior to its
acquisition by Spectrasite.

     (e)  Reflects an adjustment to eliminate interest income as if SpectraSite
had used cash-on-hand to repay Westower's outstanding indebtedness.

     (f)  Reflects adjustments to eliminate interest expense as if Westower's
credit facility and its $15,000 convertible note from BET Associates were paid
in full on January 1, 1999.

     (g)  SpectraSite's earnings per share for the year ended December 31, 1999
reflects the adoption of Statement of Financial Accounting Standards No. 128,
"Earnings Per Share", which requires companies to compute earnings per share
under two different methods, basic and diluted. The weighted average common
shares outstanding at December 31, 1999 reflects the issuance of 15.5 million
shares of SpectraSite common stock in exchange for all of the outstanding shares
of Westower common stock.

     If SpectraSite had net income during this period, diluted earnings per
share would have included potential common shares related to its convertible
preferred stock and outstanding options. These potential common shares were not
included in the diluted earnings per share calculation for the year ended
December 31, 1999 because the effect would have been antidilutive. In connection
with the Nextel tower acquisition, provisions for dividends and redemption were
eliminated with respect to SpectraSite Holdings' Series A and Series B preferred
stock.


                                      E-8




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