SPECTRASITE HOLDINGS INC
8-A12G, 1999-09-01
COMMUNICATIONS SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTO N, DC 20549

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                    PURSUANT TO SECTION 12(b) OR 12(g) OF THE
                       SECURITIES AND EXCHANGE ACT OF 1934

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

                           SPECTRASITE HOLDINGS, INC.
             (Exact Name of Registrant as Specified in its Charter)

              DELAWARE                                  56-2027322
(State of Incorporation or Organization)       (IRS Employer Identification)

                         8000 REGENCY PARKWAY, SUITE 570
                           CARY, NORTH CAROLINA 27511
               (Address of Principal Executive Offices) (Zip Code)

     If this form relates to the registration of a class of securities  pursuant
to  Section  12(b) of the  Exchange  Act and is  effective  pursuant  to General
Instruction A.(c), check the following box. [_].

     If this form relates to the registration of a class of securities  pursuant
to  Section  12(g) of the  Exchange  Act and is  effective  pursuant  to General
Instruction A.(d), check the following box. [X]

     Securities  Act  registration  statement  file  number  to which  this form
relates: 333-84857

     Securities to be registered pursuant to Section 12(b) of the Act:

   Title of Each Class                         Name Of Each Exchange on Which
   To Be So Registered                         Each Class Is To Be Registered

         NONE.                                 NONE.



     Securities to be registered pursuant to Section 12(g) of the Act:

                         Common stock, par value $0.001



          This registration statement contains a total of three pages.

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

<PAGE>


Item 1.  Description of Securities to be Registered.

     A description of the common stock to be registered by this Form,  including
the  information  required  by Item  202 of  Regulation  S-K,  is to be found in
SpectraSite  Holdings,  Inc.'s prospectus filed pursuant to Rule 424(b)(3) filed
with the Securities  and Exchange  Commission on August 12, 1999 to its Form S-4
Registration Statement,  No. 333-84857, as supplemented on August 20, 1999. That
description is incorporated herein by reference.  In addition,  the stockholders
of SpectraSite have executed a written consent to increase the authorized shares
of SpectraSite common stock to 300,000,000.


Item 2.  Exhibits.

     2.1  Agreement  and Plan of  Merger,  dated as of  February  10,  1999 (the
          "Nextel Merger Agreement"),  among  NextelCommunications,  Inc., Tower
          Parent  Corp.,  Tower Merger  Vehicle,  Inc.,  Tower Asset Sub,  Inc.,
          SpectraSite Holdings, Inc., SpectraSite  Communications,  Inc. and SHI
          Merger Sub,  Inc.  (incorporated  by  reference  to exhibit 2.1 of the
          SpectraSite's Form S-4 Registration Statement, No. 333-67043)

     2.2  Amendment  No.  1 to the  Nextel  Merger  Agreement  (incorporated  by
          reference to exhibit 2.2 of the  SpectraSite's  Form S-4  Registration
          Statement, No. 333-67043)

     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 exhibit 2.3 of the  SpectraSite's  Form
          S-4 Registration Statement, No. 333-67043)

     3.1  Amended Bylaws of SpectraSite Holdings, Inc.

     3.8  Bylaws of  Integrated  Site  Development,  dated as of April 25,  1999
          (incorporated  by reference to exhibit 3.8 of the  SpectraSite's  Form
          S-4 Registration Statement, No. 333-67043)

     3.9  Amended and  Restated  Certificate  of  Incorporation  of  SpectraSite
          Holdings,  Inc.  (Incorporated  by  reference  to  exhibit  3.9 of the
          SpectraSite's Form S-4 Registration Statement, No. 333-67043)

     4.1  Indenture,  dated as of June 26, 1998, between  SpectraSite  Holdings,
          Inc.  and  United  States  Trust  Company  of  New  York,  as  trustee
          (incorporated  by reference to exhibit 4.1 of the  SpectraSite's  Form
          S-4 Registration Statement, No. 333-67043)

     4.2  First Supplemental Indenture, dated as of March 25, 1999 (incorporated
          by reference to exhibit 4.2 of the SpectraSite's Form S-4 Registration
          Statement, No. 333-67043)

<PAGE>


     4.3  Indenture,  dated as of April 20, 1999, between SpectraSite  Holdings,
          Inc.  and  United  States  Trust  Company  of  New  York,  as  trustee
          (incorporated  by reference to exhibit 4.3 of the  SpectraSite's  Form
          S-4 Registration Statement, No. 333-67043)

     10.1 Credit  Agreement,  dated April 20, 1999, by and among the SpectraSite
          Holding,  Inc.,  SpectraSite  Communications,  Inc., CIBC  Oppenheimer
          Corp.,  Credit  Suisse  First  Boston  Corporation  and other  parties
          thereto


<PAGE>



                                   SIGNATURES

     Pursuant to the  requirements of Section 12 of the Securities  Exchange Act
of 1934, the registrant  has duly caused this  registration  to be signed on its
behalf by the undersigned, thereto duly authorized.


                                               SPECTRASITE HOLDINGS, INC.



DATE: August 31, 1999                          BY: /s/ David P. Tomick
                                                   --------------------
                                                   David P. Tomick
                                                   Chief Financial Officer



                                                                     Exhibit 3.1










                                     AMENDED


                                     BYLAWS

                                       OF

                           SPECTRASITE HOLDINGS, INC.




<PAGE>



                                 AMENDED BYLAWS

                                       OF

                           SPECTRASITE HOLDINGS, INC.


                                    ARTICLE I
                                     OFFICES

     1.  Principal  Office.  The principal  office of the  Corporation  shall be
located in Wake County,  North  Carolina or such other place as is designated by
the Board of Directors.

     2. Registered Office. The registered office of the Corporation  required by
law to be maintained in the State of Delaware may be, but need not be, identical
with the principal office.

     3. Other  Offices.  The  Corporation  may have offices at such other places
either  within or without the State of Delaware,  as the Board of Directors  may
from time to time determine or as the affairs of the Corporation may require.

                                   ARTICLE II
                            MEETINGS OF STOCKHOLDERS

          1.     Place of  Meetings.  All meetings of  stockholders  shall be
held at the principal  office of the Corporation or at such other place,  either
within or without the State of Delaware, as shall be designated in the notice of
the meeting or in the waiver of notice thereof.

          2.     Annual Meeting.  The annual meeting of the stockholders shall
be held at the principal office of the Corporation  during the month of December
of each  year on any day in that  month  (except  a  Saturday,  Sunday  or legal
holiday)  and at such  time as is  determined  by the  Board of  Directors,  and
designated  in the notice of meeting,  for the purpose of electing  Directors of
the  Corporation  and  for the  transaction  of such  other  business  as may be
properly brought before the meeting.

          3.     Substitute  Annual  Meeting.  If the annual meeting shall not
be held on the day designated by Section 2 of this Article II of these Bylaws, a
substitute  annual  meeting may be called in accordance  with the  provisions of
Section 4 of this  Article II as soon  thereafter  as  convenient.  A meeting so
called shall be designated  and treated for all purposes as the annual  meeting.
The shares represented at such substitute annual meeting, either in person or by
proxy,  and entitled to vote thereat,  shall constitute a quorum for the purpose
of such meeting.

          4.     Special Meetings.  Special meetings of the stockholders may be
called at any time by the President,  Secretary or the Board of Directors of the
Corporation,  or by any  stockholder  pursuant  to the  written  request  of the
holders of not less than one-tenth  (1/10) of all the shares entitled to vote at
the meeting. At any special meeting of the stockholders,  only such business may
be transacted  which is related to the purposes of such meeting set forth in the
notice  thereof given  pursuant to Section 5 of this Article II or in any waiver
of notice given pursuant to Section 6 of this Article II.

<PAGE>

         5.       Notice of Meetings.

                  (a)  Written or printed  notice  stating the time and place of
the meeting  shall be delivered  not less than ten (10) nor more than sixty (60)
days  before  the date  thereof,  either  personally  or by  mail,  by or at the
direction  of the  Board of  Directors,  President,  Secretary  or other  person
calling the  meeting,  to each  stockholder  of record  entitled to vote at such
meeting on the record date as  explained in Section 6 of Article VII. If mailed,
such notice shall be deemed to be delivered  when deposited in the United States
mail addressed to the  stockholder at his address as it appears on the record of
stockholders of the Corporation, with the correct postage thereon prepaid.

                  (b) In the case of an annual or substitute annual meeting, the
notice of meeting  need not  specifically  state the  business to be  transacted
thereat  unless it is a matter,  other than election of Directors,  on which the
vote of the stockholders is expressly required by the provisions of the Delaware
General Corporation Law. In the case of a special meeting, the notice of meeting
shall  specifically  state the  purpose  or  purposes  for which the  meeting is
called.

                  (c) When a meeting is adjourned  for thirty (30) days or more,
or when a new  record  date is fixed  after the  adjournment  for the  adjourned
meeting,  notice of the  adjourned  meeting  shall be given as in the case of an
original meeting.  When a meeting is adjourned for less than thirty (30) days in
any one  adjournment,  it is not  necessary  to give any  notice of the time and
place of the adjourned  meeting or of the business to be  transacted  thereat to
the persons present at such meeting other than by announcement at the meeting at
which  the  adjournment  is  taken;  provided,  however,  notice  shall be given
pursuant to Section 5 of this  Article II to all persons  not in  attendance  or
those persons  departing such adjourned  meeting  before such  announcement  was
made.

         6.  Waivers of Notice.  Whenever  notice is required to be given to any
stockholder  under any provision of the Delaware  General  Corporation  Law, the
Certificate of Incorporation or the Bylaws, a written waiver thereof,  signed by
the  stockholder  entitled  to  notice,  shall be deemed  equivalent  to notice.
Attendance of a stockholder at a meeting shall  constitute a waiver of notice of
such  meeting,  except  when the  stockholder  attends a meeting for the express
purpose of objecting, at the beginning of the meeting, to the transaction of any
business  because the meeting is not lawfully  called or  convened.  Neither the
business to be transacted at, nor the purpose of, any regular or special meeting
of the stockholders need be specified in any written waiver of notice.

         7. Voting  Lists.  At least ten (10) days  before  each  meeting of the
stockholders the Secretary of the Corporation shall prepare an alphabetical list
of the stockholders entitled to vote at such meeting or any adjournment thereof,
with the address of and number of shares held by each,  which list shall be kept
on file at a location  in the city  where  such  meeting is to be held or at the
place  where  such  meeting is to be held for a period of ten (10) days prior to
such meeting,  and shall be subject to inspection by any stockholder at any time
during the usual business hours.  This list shall also be produced and kept open
at the time and place of the meeting and shall be subject to  inspection  by any
stockholder during the whole time of the meeting.

         8.       Quorum.


<PAGE>

                  (a)  Unless  otherwise  provided  by  law,  the  holders  of a
majority  of the shares  entitled  to vote,  represented  in person or by proxy,
shall constitute a quorum at a meeting of stockholders. When a quorum is present
at the original  meeting,  any business which might have been  transacted at the
original meeting may be transacted at an adjourned  meeting,  even when a quorum
is not  present.  In the  absence of a quorum at the  opening of any  meeting of
stockholders,  such meeting may be  adjourned  from time to time by the Board of
Directors  or the vote of a  majority  of the  shares  voting  on the  motion to
adjourn,  but no other  business may be transacted  until and unless a quorum is
present. If a later quorum is present at an adjourned meeting, then any business
may be transacted which might have been transacted at the original meeting.

                  (b) The stockholders at a meeting at which a quorum is present
may continue to do business until adjournment, notwithstanding the withdrawal of
sufficient stockholders to leave less than a quorum.

         9.       Voting of Shares.

                  (a) Every  stockholder  of record  shall be  entitled at every
meeting of  stockholders to one vote for each share of capital stock standing in
his or her name on the record of  stockholders  determined  in  accordance  with
Section 6 of Article VII.

                  (b)  Except  in the  election  of  Directors,  the  vote  of a
majority of the shares  voted on any matter at a meeting of  stockholders,  duly
held and at which a quorum is present,  shall be the act of the  stockholders on
that  matter,  unless a vote by a greater  number is  required  by law or by the
Certificate of Incorporation or Bylaws of the Corporation.

                  (c) Voting on all matters  except the  election  of  Directors
shall be by voice  vote or by a show of hands  unless the  holders of  one-tenth
(1/10) of the shares  represented at the meeting  shall,  prior to the voting on
any  matter,  demand a  ballot  vote on that  particular  matter.  Elections  of
Directors shall be by ballot only.

                  (d) Shares of its own stock owned by the Corporation, directly
or indirectly,  through a subsidiary or otherwise,  shall not be voted and shall
not be counted  in  determining  the total  number of shares  entitled  to vote;
except  that  shares  held in a  fiduciary  capacity  may be voted  and shall be
counted to the extent provided by law.

         10.  Proxies.  Shares  may be voted  either in person or by one or more
agents  authorized by a written proxy executed by the stockholder or by his duly
authorized  attorney-in-fact.  A proxy is not  valid  after  the  expiration  of
thirty-six  (36)  months  from  the date of its  execution,  unless  the  person
executing it specifies therein the length of time for which it is to continue in
force, or limits its use to a particular meeting.

         11.      Inspectors of Election.

                  (a)  Appointment of Inspectors of Election.  In advance of any
meeting of stockholders,  the Board of Directors may appoint any persons,  other
than  nominees for office,  as  inspectors of election to act at such meeting or
any  adjournment  thereof.  If inspectors of election are not so appointed,  the
chairman of any such meeting may appoint  inspectors of election at the


<PAGE>


meeting.  The number of  inspectors  shall be either  one or three.  In case any
person  appointed as  inspector  fails to appear or fails or refuses to act, the
vacancy may be filled by appointment by the Board of Directors in advance of the
meeting or at the meeting by the person acting as chairman.

                  (b) Duties of  Inspectors.  The  inspectors of election  shall
determine  the number of shares  outstanding  and the voting power of each,  the
shares represented at the meeting,  the existence of a quorum, the authenticity,
validity and effect of proxies,  receive  votes,  ballots or consents,  hear and
determine all challenges and questions in any way arising in connection with the
right to vote,  count and tabulate all votes or consents,  determine  the result
and do such acts as may be proper to conduct the election or vote with  fairness
to all  stockholders.  The  inspectors  of election  shall  perform their duties
impartially, in good faith, to the best of their ability and as expeditiously as
is practical.

                  (c) Vote of  Inspectors.  If there  are  three  inspectors  of
election,  the decision,  act or certificate of a majority shall be effective in
all respects as the decision, act or certificate of all.

                  (d) Report of  Inspectors.  On request of the  chairman of the
meeting,  the  inspectors  shall make a report in writing  of any  challenge  or
question or matter  determined by them and shall  execute a  certificate  of any
fact found by them. Any report or certificate  made by them shall be prima facie
evidence of the facts stated therein.

         12.  Informal Action by  Stockholders.  Any action which is required or
permitted to be taken at a meeting of the  stockholders  may be taken  without a
meeting if a consent in  writing,  setting  forth the action so taken,  shall be
signed and dated by the holders of  outstanding  stock  having not less than the
minimum number of votes that would be necessary to authorize or take such action
at a meeting at which all shares entitled to vote thereon were present and voted
and shall be delivered to the  Corporation by delivery to its registered  office
in the State of Delaware, its principal place of business or an officer or agent
of the Corporation  having custody of the book in which  proceedings of meetings
of stockholders are recorded.  Delivery to the  Corporation's  registered office
shall be by hand or by certified or registered mail,  return receipt  requested.
When corporate action is taken without a meeting by less than unanimous  written
consent,  prompt  notice  shall  be given  to  those  stockholders  who have not
consented  in  writing.  Such  signed  and dated  action  must be filed with the
Secretary of the Corporation to be kept in the Corporate  minutes book,  whether
done before or after the action so taken,  but in no event later than sixty (60)
days after the first signature date.

                                   ARTICLE III
                                    DIRECTORS

         1.       General Powers.  The business and affairs of the Corporation
shall be managed by the Board of  Directors or by such  committees  as the Board
may establish pursuant to these Bylaws.

         2. Number,  Term and  Qualification.  The number of persons  serving as
Directors  of the  Corporation  shall be not less  than  five (5) nor more  than
fifteen  (15) as may be fixed

<PAGE>

or  changed  from  time  to  time,  within  the  minimum  and  maximum,  by  the
stockholders or by the Board of Directors. Each Director shall hold office until
his death, resignation, retirement, removal, disqualification,  or his successor
is  elected  and  qualifies.  Directors  need not be  residents  of the State of
Delaware or stockholders of the Corporation.

         3.  Election  of  Directors.  Except as  provided  in Section 5 of this
Article  III,  the  Directors  shall be  elected  at the  annual  meeting of the
stockholders, and those persons who receive the highest number of votes shall be
deemed to have been elected. Election of Directors shall be by written ballot.

         4. Removal.  Directors may be removed from office with or without cause
by a vote of stockholders  holding a majority of the outstanding shares entitled
to vote at an election of Directors.  If a director is elected by a voting group
of  stockholders,  only the stockholders of that voting group may participate in
the vote to remove him. If any  Directors  are so removed,  new Directors may be
elected at the same meeting.

         5. Vacancies. A vacancy occurring in the Board of Directors, including,
but not limited to, a vacancy created by an increase in the authorized number of
Directors  or  resulting  from  the  stockholders'  failure  to  elect  the full
authorized  number of  Directors,  may be filled by the Board of Directors or if
the  Directors  remaining  in  office  constitute  less  than  a  quorum  of the
Directors,  they may fill the vacancy by the  affirmative  vote of a majority of
all remaining Directors or by the sole remaining Director.  If the vacant office
was held by a Director elected by a voting group, only the remaining Director or
Directors  elected by that voting  group or the holders of shares of that voting
group are  entitled to fill the  vacancy.  A Director  elected to fill a vacancy
shall be elected  for the  unexpired  term of his  predecessor  in  office.  The
stockholders  may elect a Director at any time to fill any vacancy not filled by
the Directors.

         6. Chairman.  There may be a Chairman of the Board of Directors elected
by the Directors from their number at any meeting of the Board of Directors. The
Chairman  shall  preside  at all  meetings  of the  Board  of  Directors  and of
stockholders  and perform  such other  duties as may be directed by the Board of
Directors.  Until a Chairman of the Board of Directors is elected, the President
of the  Corporation  shall preside at the meetings of the Board of Directors and
stockholders.

         7.   Compensation.   The  Board  of  Directors   may  provide  for  the
compensation  of  Directors  for their  services as such and may provide for the
payment of any and all expenses  incurred by the  Directors in  connection  with
such services.

         8.       Executive and Other Committees.

                  (a)  The  Board  of  Directors,  by  resolution  adopted  by a
majority of the number of Directors then in office, may designate from among its
members an Executive  Committee and one or more other Committees each consisting
of one or more Directors,  and each of which, to the extent authorized by law or
provided in the resolution,  shall have and may exercise all of the authority of
the Board of Directors and may authorize the corporate seal to be affixed to all
papers which may require it, except no such committee shall have authority as to
the following  matters:  (i) the  dissolution,  merger or  consolidation  of the
Corporation,  or the sale, lease or

<PAGE>

exchange of all or substantially  all of the property of the  Corporation;  (ii)
the amendment of the Certificate of Incorporation; (iii) the amendment or repeal
of the Bylaws or adoption of new Bylaws; (iv) the declaration of a dividend; (v)
the issuance of stock;  (vi) the  adoption of a  certificate  of  ownership  and
merger pursuant to Section 253 of the Delaware General Corporation Law.

                  (b) Any resolutions  adopted or other action taken by any such
committee  within  the scope of the  authority  delegated  to it by the Board of
Directors  shall be deemed for all  purposes to be adopted or taken by the Board
of Directors.  The  designation of any committee and the  delegation  thereto of
authority  shall not operate to relieve the Board of  Directors,  or any members
thereof, of any responsibility or liability imposed upon it or him by law.

                  (c) If a  committee  member  is absent  or  disqualified,  the
qualified  members present at a meeting,  even if not a quorum,  may unanimously
appoint  another Board of Directors  member to act in the absent or disqualified
member's place.

                  (d) Regular meetings of any such committee may be held without
notice  at such time and  place as such  committee  may fix from time to time by
resolution.  Special  meetings of any such committee may be called by any member
thereof upon not less than one day's notice stating the place,  date and hour of
such  meeting,  which  notice may be written  or oral,  and if mailed,  shall be
deemed to be delivered when deposited in the United States mail addressed to any
member of the  Executive  Committee at his business  address.  Any member of the
Executive Committee may waive notice of any meeting and no notice of any meeting
need be given to any member  thereof  who  attends  in  person.  The notice of a
meeting of the Executive  Committee  need not state the business  proposed to be
transacted at the meeting.

                  (e) A  majority  of the  members of any such  committee  shall
constitute a quorum for the transaction of business at any meeting thereof,  and
actions  of such  committee  must be  authorized  by the  affirmative  vote of a
majority of the members of such committee.

                  (f) Any  member of any such  committee  may be  removed at any
time with or without cause by  resolution  adopted by a majority of the Board of
Directors.

                  (g) Any such  committee  shall elect a presiding  officer from
among its  members  and may fix its own rules of  procedure  which  shall not be
inconsistent with these Bylaws. It shall keep regular minutes of its proceedings
and report the same to the Board of Directors for its information at the meeting
thereof held next after the proceedings shall have been taken.

                                   ARTICLE IV
                              MEETING OF DIRECTORS

         1. Regular Meetings.  A regular meeting of the Board of Directors shall
be held  immediately  after,  and at the same place as,  the  annual  meeting of
stockholders.  In addition,  the Board of Directors may provide,  by resolution,
the time and place for the holding of additional regular meetings.

<PAGE>

         2. Special Meetings.  Special meetings of the Board of Directors may be
called by or at the  request of the  Chairman of the Board (if one has been duly
elected), the President or any two Directors.

         3.       Notice of Meetings.

                  (a) Regular meetings of the Board of Directors may be held
without notice.

                  (b) The  person or  persons  calling a special  meeting of the
Board of  Directors  shall,  at least two days before the  meeting,  give notice
thereof by any usual  means of  communication.  Such  notice or waiver of notice
shall specify the business to be  transacted  at, or the purpose of, the meeting
that is called. Notice of an adjourned meeting need not be given if the time and
place are fixed at the meeting  adjourning and if the period of adjournment does
not exceed ten (10) days in any one adjournment.

                  (c) A Director may waive notice of any meeting.  Attendance by
a Director at a meeting  shall  constitute  a waiver of notice of such  meeting,
except where a Director  attends a meeting for the express  purpose of objecting
to the transaction of any business because the meeting is not lawfully called or
convened.

         4. Quorum. A majority of the Directors in office immediately before the
meeting shall constitute a quorum for the transaction of business at any meeting
of the Board of Directors.

         5.       Manner of Acting.

                  (a) Except as otherwise provided in this Section, the act of a
majority  of the  Directors  then in  office  shall  be the act of the  Board of
Directors,  unless a greater  number is  required  by law,  the  Certificate  of
Incorporation of the Corporation, or a Bylaw adopted by the stockholders.

                  (b) A Director of the Corporation, who is present at a meeting
of the Board of  Directors  at which  action on any  corporate  matter is taken,
shall be presumed to have  assented to the action taken unless his contrary vote
is recorded or his dissent is otherwise entered in the minutes of the meeting or
unless he shall file his written  dissent to such action with the person  acting
as the secretary of the meeting before the adjournment  thereof or shall forward
such dissent by registered mail to the Secretary of the Corporation  immediately
after the adjournment of the meeting. Such right of dissent shall not apply to a
Director who voted in favor of such action.

                  (c) The vote of a majority of the number of Directors  then in
office  shall  be  required  to adopt a  resolution  constituting  an  Executive
Committee  or  other  committee  of the  Board.  The vote of a  majority  of the
Directors  then  holding  office  shall be required to adopt,  amend or repeal a
Bylaw, or to adopt a resolution dissolving the Corporation without action by the
stockholders, in such circumstances as authorized by law. Vacancies in the Board
of  Directors  may be filled as  provided  in Section 5 of Article  III of these
Bylaws.

<PAGE>

         6.  Informal  Action by  Directors.  Action  taken by the  Directors or
members  of a  committee  of  the  Board  of  Directors  without  a  meeting  is
nevertheless  Board or  committee  action if  written  consent  to the action in
question is signed by all of the Directors or members of the  committee,  as the
case may be,  and filed  with the  minutes  of the  proceedings  of the Board or
committee, whether done before or after the action so taken.

         7.  Attendance by Telephone.  Any one or more Directors or members of a
committee may  participate  in a meeting of the Board or committee by means of a
conference telephone or similar  communications  device which allows all persons
participating in the meeting to hear each other,  and such  participation in the
meeting shall be deemed presence in person at such meeting.

                                    ARTICLE V
                                    OFFICERS

         1.  Number.  The  officers  of  the  Corporation  shall  consist  of  a
President,  a  Secretary,  a  Treasurer,  and such  Vice  Presidents,  Assistant
Secretaries,  Assistant  Treasurers and other officers as the Board of Directors
may  from  time to time  elect.  Any two or more  offices,  other  than  that of
President and Secretary,  may be held by the same person. In no event,  however,
may an  officer  act in more  than  one  capacity  where  action  of two or more
officers is required.

         2. Election and Term. The officers of the Corporation  shall be elected
by the Board of  Directors.  Such election may be held at any regular or special
meeting  of  the  Board.  Each  officer  shall  hold  office  until  his  death,
resignation, retirement, removal, disqualification,  or his successor is elected
and qualifies.

         3.  Removal.  Any officer or agent elected or appointed by the Board of
Directors  may be removed by the Board with or without  cause;  but such removal
shall be without  prejudice  to the  contract  rights,  if any, of the person so
removed.

         4.  Resignations.  Any  officer  may  resign at any time in  writing by
notifying the Board or the President or the Secretary.  Such  resignation  shall
take  effect at the date of receipt  of such  notice or at such later time as is
therein  specified,  and,  unless  otherwise  specified,  the acceptance of such
resignation shall not be necessary to make it effective.  The resignation of any
officer shall be without prejudice to the contract rights of the Corporation, if
any.

         5.  Compensation.  The  compensation of all officers of the Corporation
shall be fixed by the Board of Directors.

         6. President. The President shall be the chief executive officer of the
Corporation  and,  subject  to the  control  of the  Board of  Directors,  shall
supervise and control the management of the Corporation in accordance with these
Bylaws.  He shall,  in the  absence  of a  Chairman  of the Board of  Directors,
preside at all meetings of the Board of  Directors  and  stockholders.  He shall
sign, with any other proper officer,  certificates for shares of the Corporation
and any deeds,  mortgages,  bonds,  contracts, or other instruments which may be
lawfully  executed  on behalf  of the  Corporation,  except  where  required  or
permitted  by law to be  otherwise  signed and  executed  and  except  where the
signing and  execution  thereof  shall be delegated by the Board of Directors to
some other  officer or agent;  and,  in  general,  he shall  perform  all duties
incident to the office of

<PAGE>

President  and such other duties as may be  prescribed by the Board of Directors
from time to time.

         7.  Vice  Presidents.  The  Vice  Presidents,  in the  order  of  their
appointment,  unless otherwise  determined by the Board of Directors,  shall, in
the absence or disability of the President,  perform the duties and exercise the
powers of that  office.  In addition,  they shall  perform such other duties and
have  such  other  powers  as the  President  or the  Board of  Directors  shall
prescribe.  The Board of Directors may designate one or more Vice  Presidents to
be responsible for certain functions,  including, but not limited to, Marketing,
Finance, Manufacturing and Personnel.

         8. Secretary. The Secretary shall keep accurate records of the acts and
proceedings of all meetings of stockholders,  Directors and committees. He shall
give all notices  required  by law and by these  Bylaws.  He shall have  general
charge of the  corporate  books and records and of the  corporate  seal,  and he
shall affix the corporate seal to any lawfully executed instrument requiring it.
He shall have general charge of the stock transfer books of the  Corporation and
shall keep, at the registered or principal office of the  Corporation,  a record
of stockholders  showing the name and address of each stockholder and the number
and class of the  shares  held by each.  He shall sign such  instruments  as may
require his  signature,  and, in general,  attest the  signature  or certify the
incumbency  or  signature  of any other  officer  of the  Corporation  and shall
perform all duties incident to the office of the Secretary and such other duties
as may be  assigned  to him  from  time to time by the  President  or  Board  of
Directors.

         9.  Treasurer.  The  Treasurer  shall  have  custody  of all  funds and
securities  belonging to the Corporation and shall receive,  deposit or disburse
the same under the direction of the Board of  Directors.  He shall keep full and
accurate  accounts  of the  finances  of the  Corporation  in  books  especially
provided for that purpose,  which may be consolidated or combined  statements of
the Corporation and one or more of its subsidiaries as appropriate, that include
a balance sheet as of the end of the fiscal year,  an income  statement for that
year, and a statement of cash flows for the year unless that information appears
elsewhere in the financial statements.  If financial statements are prepared for
the Corporation on the basis of generally accepted  accounting  principles,  the
annual financial statements must also be prepared on that basis. The Corporation
shall  mail the  annual  financial  statements,  or a  written  notice  of their
availability,  to each  stockholder  within one hundred twenty (120) days of the
close of each fiscal year. The Treasurer  shall, in general,  perform all duties
incident to his office and such other duties as may be assigned to him from time
to time by the President or by the Board of Directors.

         10. Assistant Secretaries and Treasurers. The Assistant Secretaries and
Assistant Treasurers shall, in the absence or disability of the Secretary or the
Treasurer,  perform the respective  duties and exercise the respective powers of
those offices, and they shall, in general, perform such other duties as shall be
assigned to them by the  Secretary  or the  Treasurer,  respectively,  or by the
President or by the Board of Directors.

         11. Controller and Assistant  Controllers.  The Controller,  if one has
been appointed,  shall have charge of the accounting  affairs of the Corporation
and shall have such other  powers and perform  such other duties as the Board of
Directors shall designate.  Each Assistant Controller shall have such powers and
perform  such  duties  as may be  assigned  by the Board of

<PAGE>

Directors,  and the  Assistant  Controllers  shall  exercise  the  powers of the
Controller during that officer's absence or inability to act.

         12. Bonds.  The Board of Directors,  by resolution,  may require any or
all  officers,  agents and  employees  of the  Corporation  to give bonds to the
Corporation,  with sufficient sureties,  conditioned on the faithful performance
of the duties of their respective offices or positions,  and to comply with such
other conditions as may from time to time be required by the Board of Directors.

                                   ARTICLE VI
                          CONTRACTS, LOAN AND DEPOSITS

         1.  Contracts.  The Board of  Directors  may  authorize  any officer or
officers, or agent or agents, to enter into any contracts or execute and deliver
any instrument on behalf of the  Corporation,  and such authority may be general
or confined to specific instances, or otherwise limited.
         2. Loans. No loans shall be contracted on behalf of the Corporation and
no evidence of indebtedness  shall be issued in its name unless  authorized by a
resolution of the Board of Directors specifying which officer(s) may effect such
indebtedness  on behalf of the  Corporation.  Such  authority  may be general or
confined to specific instances.

         3.  Checks  and  Drafts.  All  checks,  drafts or other  orders for the
payment of money issued in the name of the  Corporation  shall be signed by such
officer or officers or agent or agents, of the Corporation and in such manner as
shall be determined from time to time by resolution of the Board of Directors.

         4. Deposits.  All funds of the Corporation not otherwise employed shall
be  deposited  from  time to  time  to the  credit  of the  Corporation  in such
depository or depositories as the Board of Directors shall direct.

                                   ARTICLE VII
                   CERTIFICATES FOR SHARES AND OTHER TRANSFER

         1.  Certificates for Shares.  Certificates  representing  shares of the
Corporation  shall be  issued,  in such  form as the  Board of  Directors  shall
determine,  to every  stockholder  for the fully paid shares owned by him. These
certificates  shall be signed by the President or any Vice President or a person
who has been designated as the chief executive officer of the Corporation and by
the Secretary,  Assistant Secretary, Treasurer or Assistant Treasurer and sealed
with the seal of the Corporation or a facsimile  thereof.  The signatures of any
such officers upon a certificate may be facsimiles or may be engraved or printed
or  omitted  if  the  certificate  is  countersigned  by a  transfer  agent,  or
registered by a registrar,  other than the Corporation  itself or an employee of
the Corporation.  In case any officer who has signed or whose facsimile or other
signature  has been  placed upon such  certificate  shall have ceased to be such
officer before such  certificate is issued,  it may be issued by the Corporation
with the same  effect as if he were such  officer at the date of its issue.  The
certificates shall be consecutively  numbered or otherwise  identified;  and the
name and  address  of the  persons to whom they are  issued,  with the number of
shares and date of issue,  shall be entered on the stock  transfer  books of the
Corporation.

<PAGE>

         2.  Transfer  of Shares.  Transfers  of shares of capital  stock of the
Corporation  shall be made only on the books of the  Corporation  by the  holder
thereof or by such holders'  duly  authorized  attorney  appointed by a power of
attorney duly  executed and filed with the Secretary or a transfer  agent of the
Corporation,  and on surrender of the certificate or  certificates  representing
such shares of capital stock properly  endorsed for transfer and upon payment of
all  necessary  transfer  taxes.  Every  certificate   exchanged,   returned  or
surrendered to the  Corporation  shall be marked  "Cancelled,"  with the date of
cancellation,  by the Secretary or an Assistant  Secretary or the transfer agent
of the Corporation, as the case may be. A person in whose name shares of capital
stock  shall  stand on the books of the  Corporation  shall be deemed  the owner
thereof to receive  dividends,  to vote as such owner and for all other purposes
as respects  the  Corporation.  No transfer of shares of capital  stock shall be
valid as  against  the  Corporation,  its  stockholders  and  creditors  for any
purpose, except to render the transferee liable for the debts of the Corporation
to the extent  provided by law,  until such transfer  shall have been entered on
the books of the Corporation by an entry showing from and to whom transferred.

         3. Transfer Agent and Registrar. The Board of Directors may appoint one
or more transfer  agents and one or more  registrars of transfer and may require
all stock  certificates to be signed or  countersigned by the transfer agent and
registered by the registrar of transfers.

         4.       Closing Transfer Books and Fixing Record Date.

                  (a) For the purpose of determining the  stockholders  entitled
to notice or to vote at any meeting of stockholders or any adjournment  thereof,
the Board of  Directors  shall fix a record  date,  which  record date shall not
precede the date upon which the resolution  fixing the record date is adopted by
the Board of Directors,  and which record date shall not be more than sixty (60)
nor less than ten (10) days before the date of such  meeting.  If no record date
is fixed by the Board of  Directors,  such  record date shall be at the close of
business  on the day next  preceding  the day on which  notice is given,  or, if
notice is waived,  at the close of business on the next day preceding the day on
which the meeting is held.  Such  determination  of stockholders of record shall
apply to any adjournment of the meeting;  provided,  however,  that the Board of
Directors may fix a new record date for the adjourned meeting.

                  (b) For the purpose of determining the  stockholders  entitled
to  consent to  corporate  action in  writing  without a  meeting,  the Board of
Directors  may fix a record  date,  which record date shall not precede the date
upon which the  resolution  fixing  the  record  date is adopted by the Board of
Directors,  and which  date  shall not be more than ten (10) days after the date
upon which the  resolution  fixing  the  record  date is adopted by the Board of
Directors.  If no record  date has been  fixed by the Board of  Directors,  such
record date,  when no prior action by the Board of Directors is required by this
chapter, shall be the first date on which a signed written consent setting forth
the action  taken or  proposed  to be taken is filed with the  Secretary  of the
Corporation.  If no record  date has been  fixed by the Board of  Directors  and
prior  action by the Board of  Directors  is  required by the  Delaware  General
Corporation  Law,  such record date shall be at the close of business on the day
on which the Board of Directors adopts the resolution taking such prior action.

                  (c) For the purpose of determining the  stockholders  entitled
to receive  payment of any  dividend or other  distribution  or allotment of any
rights,  or the  stockholders

<PAGE>

entitled to exercise any rights in respect of any change, conversion or exchange
of stock, or for the purpose of any other lawful action,  the Board of Directors
may fix a record  date,  which record date shall not precede the date upon which
the  resolution  fixing the record date is adopted,  and which record date shall
not be more than  sixty  (60) days prior to such  action.  If no record  date is
fixed,  the record date for determining  stockholders for any such purpose shall
be at the close of  business on the day on which the Board of  Directors  adopts
the resolution relating thereto.

         5. Lost Certificates. The Board of Directors may authorize the issuance
of a new share  certificate in place of a certificate  claimed to have been lost
or destroyed, upon receipt of an affidavit of such fact from the person claiming
the loss or destruction.  When  authorizing  such issuance of a new certificate,
the Board may require the claimant to give the Corporation a bond in such sum as
it may direct to  indemnify  the  Corporation  against  loss from any claim with
respect to the certificate claimed to have been lost or destroyed;  or the Board
may,  by  resolution  reciting  that  the  circumstances  justify  such  action,
authorize the issuance of the new certificate without requiring such a bond.

         6. Holder of Record. The Corporation may treat as absolute owner of the
shares the person in whose name the shares  stand of record on its books just as
if that person had full  competency,  capacity,  and  authority  to exercise all
rights of ownership  irrespective  of any knowledge or notice to the contrary or
any description indicating a representative,  pledge or other fiduciary relation
or any  reference to any other  instrument  or to the rights of any other person
appearing upon its record or upon the share certificate;  except that any person
furnishing to the  Corporation  proof of his appointment as a fiduciary shall be
treated as if he were a holder of record of the Corporation's shares.

         7. Treasury Shares. Treasury shares of the Corporation shall consist of
such shares as have been issued and thereafter acquired but not cancelled by the
Corporation.  Treasury shares shall not carry voting or dividend rights,  except
rights in share dividends.

                                  ARTICLE VIII
                        INDEMNIFICATION AND REIMBURSEMENT
                            OF DIRECTORS AND OFFICERS

         1. Indemnification for Expenses and Liabilities.  Any person who at any
time serves or has served (i) as a director,  officer,  employee or agent of the
Corporation,  (ii) at the request of the  Corporation  as a  director,  officer,
partner,  trustee, employee or agent of another foreign or domestic corporation,
partnership,  joint venture, trust or other enterprise,  or (iii) at the request
of the Corporation as a trustee or administrator under an employee benefit plan,
or is  called  as a  witness  at a time when he or she has not been made a named
defendant or respondent to any Proceeding,  shall have a right to be indemnified
by the  Corporation  to the fullest  extent from time to time  permitted  by law
against Liability and Expenses in any Proceeding (including, but not limited to,
a Proceeding  brought by or on behalf of the Corporation  itself) arising out of
his or her status as such or activities in any of the foregoing capacities.

         The Board of Directors of the  Corporation  shall take all such actions
as may be necessary  and  appropriate  to authorize the  Corporation  to pay the
indemnification required by this

<PAGE>

provision,  including without  limitation,  to the extent needed,  making a good
faith  evaluation of the manner in which the claimant for indemnity acted and of
the reasonable amount of indemnity due him or her.

         Any person who at any time serves or has served in any of the aforesaid
capacities for or on behalf of the Corporation shall be deemed to be doing or to
have done so in reliance upon, and as consideration for, the rights provided for
herein. Any repeal or modification of these indemnification provisions shall not
affect  any  rights  or  obligations  existing  at the  time of such  repeal  or
modification.  The rights  provided for herein shall inure to the benefit of the
legal representatives of any such person and shall not be exclusive of any other
rights to which such person may be entitled apart from this provision.

         The  right  granted  herein  shall  not be  limited  by the  provisions
contained  in  Section  145  of  the  Delaware  General  Corporation  Law or any
successor to such statute.

         2. Advance Payment of Expenses.  The Corporation shall (upon receipt of
an  undertaking  by or on behalf of the  director,  officer,  employee  or agent
involved to repay the Expenses  described  herein unless it shall  ultimately be
determined  that he or she is  entitled  to be  indemnified  by the  Corporation
against such Expenses) pay Expenses incurred by such director, officer, employee
or agent in defending a  Proceeding  or appearing as a witness at a time when he
or she has not been named as a defendant or a respondent with respect thereto in
advance of the final disposition of such Proceeding.

         3.  Insurance.  The  Corporation  shall have the power to purchase  and
maintain  insurance (on behalf of any person who is or was a director,  officer,
employee or agent of the Corporation, or is or was serving at the request of the
Corporation  as a director,  officer,  employee or agent of another  domestic or
foreign corporation, partnership, joint venture, trust or other enterprise or as
a trustee or administrator under an employee benefit plan) against any liability
asserted against him or her and incurred by him or her in any such capacity,  or
arising out of his or her status as such,  whether or not the Corporation  would
have the power to indemnify him or her against such liability.

         4. Definitions.  The following terms as used in this Article shall have
the following meanings. "Proceedings" means any threatened, pending or completed
action,  suit,  or  proceeding  and any  appeal  therein  (and  any  inquiry  or
investigation  that could lead to such action,  suit,  or  proceeding),  whether
civil, criminal, administrative, investigative or arbitrative and whether formal
or informal.  "Expenses" means expenses of every kind,  including  counsel fees.
"Liability" means the obligation to pay a judgment,  settlement,  penalty,  fine
(including  an excise tax assessed  with respect to an employee  benefit  plan),
reasonable  expenses  incurred with respect to a Proceeding,  and all reasonable
expenses  incurred in enforcing  the  indemnification  rights  provided  herein.
"Director,"  "officer,"  "employee"  and "agent"  include the estate or personal
representative of a director,  officer,  employee or agent.  "Corporation" shall
include any domestic or foreign  predecessor of this  Corporation in a merger or
other transaction in which the predecessor's  existence ceased upon consummation
of the transaction.

                                   ARTICLE IX
                               GENERAL PROVISIONS

<PAGE>

         1. Dividends. The Board of Directors may from time to time declare, and
the Corporation may pay,  dividends on its outstanding  shares in the manner and
upon the terms and conditions provided by law and by its charter.

         2. Seal.  The  corporate  seal  shall have the name of the  corporation
inscribed thereon and shall be in such form as may be approved from time to time
by the Board of  Directors.  Such seal may be an  impression or stamp and may be
used by the officers of the  Corporation by causing it, or a facsimile  thereof,
to be impressed or affixed or in any other manner reproduced. In addition to any
form or seal adopted by the Board of Directors,  the officers of the Corporation
may use as the corporate seal a seal in the form of a circle containing the name
of the  Corporation  and the  state  of its  incorporation  (or an  abbreviation
thereof) on the circumference and the word "Seal" in the center.

         3. Waiver of Notice. Whenever any notice is required to be given to any
stockholder or Director under the provisions of the Delaware General Corporation
Law or under the  provisions  of the  charter  or Bylaws of the  Corporation,  a
waiver  thereof in writing  signed by the  person or  persons  entitled  to such
notice,  whether before or after the time stated therein, shall be equivalent to
the giving of such notice.

         4. Fiscal Year. The fiscal year of the Corporation  shall be determined
by the Board of Directors.

         5. Form of Records.  Any records  maintained by the  Corporation in the
regular  course of its business,  including its stock ledger,  books of account,
and minute  books,  may be kept on, or be in the form of, punch cards,  magnetic
tape,  photographs,  microphotographs,  or any other information storage device;
provided that the records so kept can be converted  into a clearly  legible form
within a reasonable  time. The Corporation  shall so convert any records so kept
upon the request of any person entitled to inspect the same.

         6. Amendments. Except as otherwise provided herein, these Bylaws may be
amended or  repealed  and new Bylaws may be adopted by the  affirmative  vote of
stockholders entitled to exercise a majority of voting power of the Corporation,
or, if the Certificate of  Incorporation  of the Corporation so permits,  by the
affirmative  vote of a majority  of the  Directors  then  holding  office at any
regular or special  meeting of the Board of Directors  or by  unanimous  written
consent.

         The  Board of  Directors  shall  have no  power  to adopt a Bylaw:  (i)
changing  the  statutory  requirement  for a quorum  of  Directors  or action by
Directors or changing the statutory  requirement for a quorum of stockholders or
action by  stockholders;  (ii) providing for the  management of the  Corporation
otherwise  than by the  Board of  Directors  or the  committees  thereof;  (iii)
increasing  or  decreasing  the number of  Directors;  or (iv)  classifying  and
staggering the election of Directors.



<PAGE>



         THIS IS TO  CERTIFY  that the above  Bylaws  were duly  adopted  by the
stockholders  of the Corporation by action taken,  without a meeting,  effective
the 28th day of April, 1999.

                                                   /s/ David P. Tomick
                                                   David P. Tomick, Secretary









                                CREDIT AGREEMENT

                                      among

                 SPECTRASITE COMMUNICATIONS, INC., as Borrower;

                   SPECTRASITE HOLDINGS, INC., as a Guarantor;

                           CIBC OPPENHEIMER CORP. and
                    CREDIT SUISSE FIRST BOSTON, as Arrangers;

                CREDIT SUISSE FIRST BOSTON, as Syndication Agent;

           BANK OF MONTREAL, CHICAGO BRANCH, THE BANK OF NOVA SCOTIA,
          BANKBOSTON, N.A., DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN
           BRANCHES, TORONTO DOMINION (TEXAS), INC. AND UNION BANK OF
                      CALIFORNIA, N.A., as Managing Agents;

                  CREDIT LYONNAIS NEW YORK BRANCH, as Co-Agent;

                       CANADIAN IMPERIAL BANK OF COMMERCE,
                  as Administrative Agent and Collateral Agent;

                                       and

                      THE OTHER CREDIT PARTIES PARTY HERETO


                           Dated as of April 20, 1999














                      Paul, Hastings, Janofsky & Walker LLP
                                Atlanta, Georgia



<PAGE>






                                CREDIT AGREEMENT
                                      among
                 SPECTRASITE COMMUNICATIONS, INC., as Borrower;
                   SPECTRASITE HOLDINGS, INC., as a Guarantor;
                           CIBC OPPENHEIMER CORP. and
                    CREDIT SUISSE FIRST BOSTON, as Arrangers;
                CREDIT SUISSE FIRST BOSTON, as Syndication Agent;
           BANK OF MONTREAL, CHICAGO BRANCH, THE BANK OF NOVA SCOTIA,
          BANKBOSTON, N.A., DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN
           BRANCHES, TORONTO DOMINION (TEXAS), INC. AND UNION BANK OF
                      CALIFORNIA, N.A., as Managing Agents;
                  CREDIT LYONNAIS NEW YORK BRANCH, as Co-Agent;
                       CANADIAN IMPERIAL BANK OF COMMERCE,
                  as Administrative Agent and Collateral Agent;
                                       and
                      THE OTHER CREDIT PARTIES PARTY HERETO


             The parties to this  Agreement  hereby agree as follows,  as of the
20th day of April, 1999:


                                                     ARTICLE 1

                                                    Definitions

         For the purposes of this Agreement:

         "Acquisition"  shall mean, with respect to any Person,  any transaction
or  series of  related  transactions  for the  direct or  indirect  (whether  by
purchase, lease, exchange, issuance of stock or other equity or debt securities,
merger,  reorganization  or any other method) (a)  acquisition by such Person of
any other Person, which Person shall then become consolidated with the acquiring
Person in accordance  with GAAP,  (b)  acquisition  by such Person of all or any
substantial  part of the assets of any other Person,  or (c) acquisition by such
Person of any communications  tower facilities,  communication  tower management
businesses or related contracts.

         "Adjustment  Date" shall mean the second  (2nd)  Business Day after the
date on which the financial statements referred to in Section 7.2 hereof for two
(2) full fiscal  quarters of the Borrower from and after the Agreement Date have
been delivered to the Arrangers.

         "Administrative   Agent"  shall  mean  CIBC,  as  administrative  agent
hereunder for the Lenders and the Tranche C Lenders, together with any successor
Administrative Agent hereunder.

         "Administrative   Agent's   Office"   shall  mean  the  office  of  the
Administrative Agent, located at 425 Lexington Avenue, New York, New York 10017,
or such other office as may be designated  pursuant to the provisions of Section
13.1 of this Agreement.

         "Advance" or  "Advances"  shall mean  amounts  advanced to the Borrower
pursuant to Article 2 hereof on the occasion of any borrowing.


                                        1

<PAGE>



         "Affiliate" shall mean, with respect to a Person,  (i) any other Person
directly or indirectly controlling, controlled by, or under common control with,
such  first  Person;  (ii) any  Person  having  direct  or  indirect  beneficial
ownership  of five  percent  (5%) or more of the equity  interest  in such first
Person;  (iii) any  officer,  director  or partner of such  Person;  or (iv) any
spouse or relative  (by blood,  adoption  or  marriage)  of any such  individual
Person. For purposes of this definition, "control" when used with respect to any
Person  includes,  without  limitation,  power,  whether direct or indirect,  to
direct or cause the  direction  of the  management  and  policies of such Person
whether through the ownership of voting securities or other equity interests, by
contract or otherwise.  Unless otherwise  specified,  "Affiliate" as used herein
shall mean an Affiliate of the Borrower, and shall include,  without limitation,
Holdco.

         "Agents"  shall  mean,  collectively,  the  Administrative  Agent,  the
Collateral Agent, the Syndication  Agent, the Managing Agents,  the Co-Agent and
the Arrangers, and "Agent" shall mean any one of them.

         "Agreement" shall mean this Credit Agreement.

         "Agreement Date" shall mean the date as of which this Agreement is
dated.

         "Annualized  EBITDA" shall mean, as of any calculation date, the sum of
(i) EBITDA (Other Operations), plus (ii) Annualized EBITDA (Tower Operations).

         "Annualized   EBITDA  (Tower   Operations)"   shall  mean,  as  of  any
calculation date, the product of (i) EBITDA with respect to the Tower Operations
for the calendar  month most recently ended for which  financial  statements are
then available, times (ii) twelve (12).

         "Applicable  Law" shall mean, in respect of any Person,  all provisions
of constitutions, statutes, rules, regulations and orders of governmental bodies
or regulatory  agencies applicable to such Person,  including,  without limiting
the foregoing,  the Necessary  Authorizations,  the  Communications  Act, zoning
ordinances  and all  Environmental  Laws, all rules,  regulations  and published
decisions  of the FCC and the FAA,  and all  orders,  decisions,  judgments  and
decrees of all courts and  arbitrators  in  proceedings  or actions to which the
Person in question is a party or by which it is bound.

         "Applicable  Margin" shall mean the interest rate margin  applicable to
Advances hereunder as determined in accordance with Section 2.3(g) hereof.

         "Approved  Fund" means,  with respect to any Lender that is a fund that
invests in bank loans,  any other fund or trust or entity  that  invests in bank
loans and is advised or managed by the same investment advisor as such Lender or
by an Affiliate of such investment advisor.

         "Arrangers" shall mean CIBC Oppenheimer Corp. and CSFB.

         "Assets" shall mean any or all of the property and assets of Holdco,
the Borrower and the Borrower's Subsidiaries.

         "Assignee" shall have the meaning assigned thereto in Section 13.5(c)
hereof.

         "Assignment  and Assumption  Agreement"  shall mean each Assignment and
Assumption  Agreement,  in substantially  the form of Exhibit A attached hereto,
pursuant  to which a Lender or a Tranche C Lender may,  subject to Section  13.5
hereof, sell or participate a portion of its Loans and Commitments.

                                        2

<PAGE>



         "Assignment   of  Acquisition   Documents"   shall  mean  that  certain
Assignment of Acquisition Documents dated as of the Agreement Date among Holdco,
the Borrower,  Tower Sub and the Collateral Agent, for the benefit of the Senior
Credit Parties, in substantially the form of Exhibit B attached hereto, pursuant
to  which  Holdco,  the  Borrower  and  Tower  Sub  collaterally  assign  to the
Collateral  Agent,  for the benefit of the Senior Credit  Parties,  all of their
interest in and rights  under each of the Nextel  Acquisition  Documents  (other
than the Nextel Subordinated Security Agreement).

         "Authorized  Signatory" shall mean such senior personnel of a Person as
may be duly  authorized  and  designated  in writing  by such  Person to execute
documents, agreements and instruments on behalf of such Person.

         "Bankruptcy  Code"  shall mean the United  States  Bankruptcy  Code (11
U.S.C.  Section 101 et seq.),  as now or hereafter  amended,  and any  successor
statute.

         "Base Rate"  shall mean,  as of any date,  a simple  interest  rate per
annum  equal to the  higher  of (x) the  Prime  Rate,  or (y) the sum of (A) the
Federal Funds Rate, plus (B) one-half of one percent (1/2%). The Base Rate shall
be adjusted automatically as of the opening of business on the effective date of
each change in the Prime Rate or the Federal  Funds Rate, as the case may be, to
account for such change.

         "Base Rate Advance"  shall mean an Advance which the Borrower  requests
to be made as a Base Rate  Advance or which is  converted to a Base Rate Advance
in accordance with the provisions of Section 2.2 hereof.

         "Blockage  Ending  Event"  shall have the meaning  assigned  thereto in
Section 2.15(b)(iii) hereof.

         "Borrower" shall mean SpectraSite Communications, Inc., a Delaware
corporation.

         "Borrower Debt" shall mean, as of any calculation date, all Funded Debt
of the Borrower and its  Subsidiaries,  on a  consolidated  basis,  in each case
without  duplication.  For purposes of  calculating  the  "Leverage  Ratio," the
Tranche C Loans shall be excluded from the calculation of Borrower Debt.

         "Borrower  Pledge  Agreement"  shall mean that certain  Borrower Pledge
Agreement  between the Borrower and the Collateral Agent, for the benefit of the
Senior Credit Parties, dated as of the Agreement Date, in substantially the form
of Exhibit C attached  hereto,  pursuant  to which the  Borrower  pledges to the
Collateral  Agent all of the  Capital  Stock,  whether  now  owned or  hereafter
acquired, of its Subsidiaries.

         "Borrowing Base Amount" shall mean the lesser of (a) the sum of (i) the
product of (A) the aggregate  number of Existing  Towers having at least one (1)
anchor tenant  reasonably  acceptable  to the Arrangers  (with any Nextel Tenant
being  deemed  acceptable),  times  (B)  $110,000,  plus (ii) for each New Tower
having at least one (1) anchor  tenant  reasonably  acceptable  to the Arrangers
(with any Nextel Tenant being deemed acceptable), the lesser of (i) $125,000 and
(i)  sixty  percent  (60%) of the cost of such New  Tower,  and (b) the  Maximum
Borrowing Base Amount.

         "Business  Day" shall mean a day on which  banks and  foreign  exchange
markets are open for the transaction of business  required for this Agreement in
London and New York, as relevant to the  determination  to be made or the action
to be taken.


                                        3

<PAGE>



         "Capital   Expenditures"   shall  mean,   in  respect  of  any  Person,
expenditures  for the purchase of assets of long-term  use which are required to
be capitalized in accordance with GAAP.

         "Capital Stock" shall mean, as applied to any Person, any capital stock
of such Person, regardless of class or designation,  and all warrants,  options,
purchase rights,  conversion or exchange rights,  voting rights, calls or claims
of any character with respect thereto.

         "Capitalized  Interest"  shall mean the amount of any  interest  on the
Tranche C Loans which is not paid in cash on the quarterly due date therefor but
is  capitalized  as  additional  principal  under the Tranche C Loans as of such
quarterly due date.

         "Capitalized   Lease   Obligation"  shall  mean  that  portion  of  any
obligation  of a  Person  as  lessee  under  a lease  which  is  required  to be
capitalized on the balance sheet of such lessee in accordance with GAAP.

         "Certificate  of  Financial   Condition"   shall  mean  a  certificate,
substantially  in the form of  Exhibit D  attached  hereto,  signed by the chief
financial  officer of the  Borrower,  together with any  schedules,  exhibits or
annexes appended thereto.

         "Change of Control" shall mean any of the following:

                  (i)  prior to an  Initial  Public  Offering,  the  Controlling
Shareholders cease to be the "beneficial  owners" (as defined in Rules 13d-3 and
13d-5 under the  Exchange  Act),  directly or  indirectly,  of a majority in the
aggregate  of the total  voting  power of the  voting  Capital  Stock of Holdco,
whether  as  a  result  of  issuance  of  securities  of  Holdco,   any  merger,
consolidation,  liquidation  or  dissolution  of Holdco,  any direct or indirect
transfer of securities  by Holdco or otherwise  (for purposes of this clause (i)
and  clause  (ii)  below,  the  Controlling  Shareholders  shall  be  deemed  to
beneficially own any voting Capital Stock of an entity (the "specified  entity")
held by any  other  entity  (the  "parent  entity")  so long as the  Controlling
Shareholders  beneficially own (as so defined),  directly or indirectly,  in the
aggregate  a majority  of the voting  power of the voting  Capital  Stock of the
parent entity); or

                  (ii)  subsequent to an Initial Public  Offering,  any "person"
(as such term is used in Sections  13(d) and 14(d) of the Exchange  Act),  other
than one or more  Controlling  Shareholders,  is or becomes the beneficial owner
(as defined in clause (i) above,  except  that for  purposes of this clause (ii)
such person shall be deemed to have  "beneficial  ownership"  of all shares that
any such  person has the right to  acquire,  whether  such right is  exercisable
immediately or only after the passage of time), directly or indirectly,  of more
than  thirty-five  percent (35%) of the total voting power of the voting Capital
Stock of Holdco;  provided,  however,  that the Controlling  Shareholders do not
have the right or ability by voting power,  contract or  otherwise,  to elect or
designate  for  election a majority of the board of directors of Holdco (for the
purposes of this clause (ii),  such other person shall be deemed to beneficially
own any voting Capital Stock of a specified  entity held by a parent entity,  if
such other  person is the  beneficial  owner (as defined in this  clause  (ii)),
directly or  indirectly,  of more than  thirty-five  percent (35%) of the voting
power of the voting  Capital  Stock of such  parent  entity and the  Controlling
Shareholders  "beneficially  own" (as defined in clause (i) above),  directly or
indirectly,  in the  aggregate a lesser  percentage  of the voting  power of the
voting  Capital Stock of such parent entity and do not have the right or ability
by voting power, contract or otherwise,  to elect or designate for election of a
majority of the board of directors of such parent entity); or



                                        4

<PAGE>



                  (iii) during any period of two (2)  consecutive  years (or, in
the case this event  occurs  within the first two (2) years after the  Agreement
Date,  such  shorter  period  as  shall  have  begun  on  the  Agreement  Date),
individuals  who at the  beginning  of such  period  constituted  the  board  of
directors of Holdco  (together  with any new  directors  whose  election by such
board of  directors or whose  nomination  for  election by the  shareholders  of
Holdco was  approved  by a vote of a majority  of the  directors  of Holdco then
still in office who were either  directors  at the  beginning  of such period or
whose election or nomination for election was previously so approved)  cease for
any reason to  constitute a majority of the board of directors of Holdco then in
office; or

                  (iv)  Holdco's  merger or  consolidation  with or into another
Person  or the  merger  of  another  Person  with or  into  Holdco  if  Holdco's
securities that are outstanding  immediately prior to such transaction and which
represent  100% of the  aggregate  voting  power of  Holdco's  Voting  Stock are
changed into or exchanged for cash,  securities or property,  unless pursuant to
such  transaction such securities are changed into or exchanged for, in addition
to any  other  consideration,  securities  of  the  surviving  corporation  that
represent  immediately  after  such  transaction,  at  least a  majority  of the
aggregate voting power of the Voting Stock of the surviving corporation; or

                  (v) the sale of all or substantially all of Holdco's assets to
another  Person,  other  than a  Controlling  Shareholder  or a  Person  that is
controlled by the Controlling Shareholders; or


                  (vi) the  failure  of Holdco to own and  control,  free of any
Lien or  encumbrance  other  than  Liens in favor of the  Collateral  Agent  and
Permitted  Liens,  one  hundred  percent  (100%) of the issued  and  outstanding
Capital Stock of the Borrower (other than any Permitted High Yield  Securities);
or

                  (vii) the failure of the Borrower to own and control,  free of
any Lien or encumbrance  other than Liens in favor of the  Collateral  Agent and
Permitted  Liens,  one  hundred  percent  (100%) of the issued  and  outstanding
Capital Stock of Tower Sub and each of its other Subsidiaries.

         "CIBC"  shall mean  Canadian  Imperial  Bank of  Commerce  acting by or
through one or more of its affiliates,  branches or agencies,  and any successor
thereof.

         "Code"  shall mean the Internal  Revenue Code of 1986,  as amended from
time to time.

         "Co-Agent" shall mean Credit Lyonnais New York Branch.

         "Co-Locator" shall mean any tenant on a Tower which is not an anchor
tenant.

         "Co-Location  Percentage"  shall mean, with respect to the Borrower and
its Subsidiaries on a consolidated basis, the percentage  determined by dividing
the total number of Co-Locators by the total number of Towers.

         "Collateral" shall mean all property pledged as collateral security for
the Obligations  pursuant to the Security Documents or otherwise,  to the extent
set forth in the Security  Documents and in Section 2.15 of this Agreement,  and
all other property of Holdco, the Borrower or any of the Borrower's Subsidiaries
that is now or hereafter in the  possession or control of any Credit Party or in
which  any  Credit  Party  has been  granted a Lien;  provided,  however,  that,
notwithstanding anything to the contrary contained herein, any funds held in the


                                        5

<PAGE>



Tranche C Pre-Funded Interest Account, or any other Pre-Funded Interest Account,
shall not  constitute  Collateral  for purposes of this  Agreement and the other
Loan Documents.

         "Collateral Agent" shall mean CIBC, in its capacity as collateral agent
for the  Lenders  and the  Tranche C Lenders  hereunder  and under the  Security
Documents  to the extent set forth in Section  11.7  hereof,  together  with any
successor Collateral Agent hereunder.

         "Commitment  Ratios" shall mean the several  obligations of the Lenders
to make Advances to the Borrower under the  Commitments in accordance with their
respective  percentages  thereof  which  are set  forth  (together  with  dollar
amounts)  for each  Lender,  as of the  Agreement  Date,  on Schedule 1 attached
hereto.

         "Commitments" shall mean, collectively,  the Revolving Commitment,  the
Tranche A Commitment and the Tranche B Commitment.

         "Communications Act" shall mean the Communications Act of 1934, and any
similar or successor  federal statute,  and the rules and regulations of the FCC
thereunder, all as amended and as the same may be in effect from time to time.

         "Contributed  Capital" shall mean the sum of those amounts  Invested in
Holdco, in the form of an equity or equity-like contribution, on or prior to the
Agreement Date.

         "Controlling Shareholders" shall mean, collectively, Welsh, Whitney,
Stephen H. Clark, David P. Tomick, Joe L. Finley,  Waller-Sutton Media Partners,
L.P.,  Kitty  Hawk  Limited   Partnership,   III,  Kitty  Hawk  Capital  Limited
Partnership,  IV, Eagle Creek Capital,  L.L.C.,  The North  Carolina  Enterprise
Fund, L.P. and Finley Family Limited Partnership.

         "Convertible  Securities"  shall mean any Capital Stock or other equity
interests  of any  Person  which are  convertible,  at the  option of the holder
thereof, into Funded Debt.

         "Credit Parties" shall mean,  collectively,  the Administrative  Agent,
the Collateral Agent, the Syndication Agent, the Arrangers, the Managing Agents,
the Co-Agent, the Lenders, the Tranche C Lenders and the Issuing Bank.

         "CSFB" shall mean Credit  Suisse First Boston  acting by or through one
or more of its affiliates, branches or agencies, and any successor thereof.

         "Debt Offering" shall have the meaning set forth in Section 2.7(c)
hereof.

         "Default"  shall  mean any  Event  of  Default,  and any of the  events
specified in Section  10.1,  regardless of whether there shall have occurred any
passage of time or giving of notice,  or both,  that would be necessary in order
to constitute such event an Event of Default.

         "Default  Rate" shall mean a simple per annum  interest  rate equal to,
(i) in the case of the Senior Obligations, the sum of (x) the Base Rate, (y) the
Applicable Margin then in effect with respect to Base Rate Advances, and (z) two
percent  (2%),  and  (ii) in the case of the  Tranche  C  Obligations,  thirteen
percent (13%).

         "Dollars"  or "$" shall mean the basic unit of the lawful  currency  of
the United States of America.


                                        6

<PAGE>



         "EBITDA"  shall  mean,  for  any  period,  for  the  Borrower  and  its
Subsidiaries on a consolidated  basis,  the sum of (i) Net Income,  plus (ii) to
the extent deducted in determining Net Income,  the sum of each of the following
for such period: (a) Interest Expense,  (b) income tax expense, (c) depreciation
and amortization,  (d) extraordinary losses (less any extraordinary  gains), (e)
other  non-cash  charges  and  (f)   non-recurring   transaction   expenses  and
underwriters'  fees;  provided,  however,  (I) with  respect to any Person  that
became a Subsidiary  of, or was merged with or  consolidated  into, the Borrower
during  such  period,  or  the  Acquisition  by  the  Borrower  or  any  of  its
Subsidiaries of a substantial  part of the assets of any Person,  "EBITDA" shall
also include (x) the EBITDA of such Person or  attributable  to such assets,  as
applicable,  during such period as if such Acquisition,  merger or consolidation
had  occurred on the first day of such  period,  and (y) an amount  equal to the
projected expense savings to be realized by the Borrower or such Subsidiary,  as
the case may be, in connection with such  Acquisition from the first day of such
period through the date of such Acquisition, as demonstrated to the satisfaction
of the Majority Lenders,  and (II) with respect to any Person that has ceased to
be a Subsidiary of the Borrower  during such period,  or any material  assets of
the Borrower or any of its  Subsidiaries  sold or  otherwise  disposed of by the
Borrower or any such Subsidiary  during such period,  "EBITDA" shall exclude the
EBITDA of such Person or attributable to such assets, as applicable, during such
period as if such sale or  disposition  of such  Subsidiary  or such  assets had
occurred on the first day of such period.

         "EBITDA (Other  Operations)"  shall mean, as of any  calculation  date,
EBITDA with respect to the Other  Operations  for the twelve (12) calendar month
period ended on the last day of the calendar month most recently ended for which
financial statements are then available.

         "Environmental  Laws"  shall  mean,  with  respect to any  Person,  all
applicable  federal,   state,  local  and  municipal  laws,   statutes,   rules,
regulations and ordinances,  codes, common law, consent agreements to which such
Person  is a  party  or  by  which  it is  bound,  orders,  decrees,  judgments,
injunctions,  permits,  licenses,  authorizations and other requirements issued,
promulgated,  approved  or  entered  thereunder  affecting  such  Person  or its
property  and  relating  to, or  imposing  liability  or  standards  of  conduct
concerning, public or occupational health, safety or the pollution or protection
of the environment,  including,  without limitation, those relating to releases,
discharges,  emissions, spills, leaching, or disposals to, on, under, or in air,
water,  land or ground water,  to the withdrawal or use of ground water,  to the
use,  handling  or  disposal  of  polychlorinated  biphenyls,  asbestos  or urea
formaldehyde,  to the  treatment,  storage,  disposal or management of hazardous
substances.

         "Equity  Offering" shall have the meaning  assigned  thereto in Section
2.7(c) hereof.

         "ERISA" shall mean the Employee Retirement Income Security Act of 1974,
as in effect from time to time.

         "ERISA Affiliate" shall mean any "affiliate" of the Borrower within the
meaning of Section 414 of the Code.

         "Eurodollar  Advance" shall mean an Advance which the Borrower requests
to be made as a  Eurodollar  Advance or which is  continued as or converted to a
Eurodollar Advance in accordance with the provisions of Section 2.2 hereof.

         "Eurodollar   Advance  Period"  shall  mean,  in  connection  with  any
Eurodollar Advance, the term of such Advance selected by the Borrower, which may
be one (1),  two (2),  three  (3) or six (6)  months,  and  subject  to the last
proviso  of this  definition,  nine (9) or  twelve  (12)  months,  or  otherwise
determined in accordance with this Agreement; provided, however, notwithstanding


                                        7

<PAGE>



the  foregoing,  (i)  any  applicable  Eurodollar  Advance  Period  which  would
otherwise  end on a day which is not a  Business  Day shall be  extended  to the
succeeding  Business  Day unless  such  Business  Day falls in another  calendar
month, in which case such  Eurodollar  Advance Period shall end on the preceding
Business Day, (ii) any  applicable  Eurodollar  Advance Period which begins on a
day for which there is no  numerically  corresponding  day in the calendar month
during which such  Eurodollar  Advance Period is to end shall (subject to clause
(i) above) end on the last day of such calendar  month,  and (iii) no Eurodollar
Advance Period shall extend beyond the applicable  Maturity Date or such earlier
date as would interfere with the Borrower's repayment obligations under Sections
2.6 or 2.7 hereof;  provided  further,  however,  the  Borrower may not select a
Eurodollar  Advance Period in excess of six (6) months unless the Administrative
Agent has notified the Borrower  that such funds are available to each Lender at
a rate (exclusive of reserves and other  adjustments) at or below the Eurodollar
Rate for such proposed Advance and Eurodollar Advance Period.

         "Eurodollar Base Rate" shall mean, with respect to each day during each
Eurodollar  Advance Period,  the rate per annum determined by the Administrative
Agent to be the  arithmetic  mean (rounded to the nearest  1/100th of 1%) of the
offered rates for deposits in Dollars with a term  comparable to such Eurodollar
Advance  Period that appears on the Telerate  British  Bankers  Assoc.  Interest
Settlement Rates Page at  approximately  11:00 a.m. (London time), on the second
(2nd) full Business Day preceding  such  Eurodollar  Advance  Period;  provided,
however,  that if there  shall at any time no longer  exist a  Telerate  British
Bankers Assoc.  Interest  Settlement  Rates Page,  "Eurodollar  Base Rate" shall
mean, with respect to each day during each Eurodollar  Advance Period,  the rate
per annum equal to the rate at which CIBC is offered Dollar deposits at or about
10:00 a.m. (New York time), two (2) Business Days prior to the beginning of such
Eurodollar  Advance  Period  in  the  interbank   eurodollar  market  where  the
eurodollar  and  foreign  currency  and  exchange  operations  in respect of its
Eurodollar  Advances are then being  conducted  for delivery on the first day of
such Eurodollar  Advance Period for the number of days comprised  therein and in
the amount comparable to the amount of its Eurodollar  Advance to be outstanding
during such Eurodollar Advance Period. As used herein, "Telerate British Bankers
Assoc. Interest Settlement Rates Page" shall mean the display designated as page
3750 on the  Telerate  System  Incorporated  Service  (or such other page as may
replace  such page on such  service for the purpose of  displaying  the rates at
which  Dollar  deposits  are  offered by leading  banks in the London  interbank
deposit market).

         "Eurodollar  Rate"  shall  mean,  with  respect to each day during each
Eurodollar  Advance  Period,  a  rate  per  annum  determined  for  such  day in
accordance with the following  formula (rounded upward to the nearest 1/100th of
1%):

                              Eurodollar Base Rate
                      1.00 - Eurodollar Reserve Percentage

         "Eurodollar Reserve Percentage" shall mean, for any day as applied to a
Eurodollar Advance, the aggregate (without  duplication) of the rates (expressed
as a decimal fraction) of reserve requirements in effect on such day (including,
without limitation,  basic, supplemental,  marginal and emergency reserves under
any regulations of the Board of Governors of the Federal Reserve System or other
Governmental  Authority having  jurisdiction  with respect thereto) dealing with
reserve requirements  prescribed for eurocurrency funding (currently referred to
as  "Eurocurrency  Liabilities"  in Regulation D of such Board)  maintained by a
member bank of the Federal Reserve System.

         "Event of Default"  shall mean any of the events  specified  in Section
10.1, provided that any requirement for notice or lapse of time or both has been
satisfied.


                                        8

<PAGE>



         "Excess  Cash Flow" shall mean,  with  respect to the  Borrower and its
Subsidiaries  on a consolidated  basis,  as of the end of any fiscal year of the
Borrower and based on the audited financial  statements  required to be provided
under  Section  7.3  hereof,  the  excess of (a) EBITDA  (without  regard to the
proviso in the definition of the term  "EBITDA") for such fiscal year,  over (b)
the sum of the following  items for such fiscal year:  (i) Fixed  Charges;  (ii)
non-maintenance Capital Expenditures; and (iii) permanent, voluntary prepayments
of the Senior Loans (accompanied by permanent  reduction in a like amount of the
Revolving  Commitment,  in the case of such  prepayment of the Revolving  Loans)
hereunder.

         "Excess  Cash Flow  Recapture  Date" shall mean,  with  respect to each
fiscal  year of the  Borrower,  that date  which is the  earlier to occur of (a)
ninety  (90) days after the end of such fiscal  year,  and (b) the date on which
the Borrower shall have provided to the Credit Parties the financial  statements
required to be  provided  under  Section 7.3 hereof with  respect to such fiscal
year.

         "Exchange  Act" shall mean the  Securities  Exchange Act of 1934, as it
may be amended, and any successor act thereto.

         "Existing  Tower" shall mean each Tower owned by the Borrower or any of
its Subsidiaries on the day prior to the Agreement Date.

         "FAA"  shall mean the  Federal  Aviation  Administration,  or any other
similar or successor agency of the federal government.

         "FCC" shall mean the Federal  Communications  Commission,  or any other
similar  or  successor  agency  of  the  federal  government  administering  the
Communications Act.

         "Federal Funds Rate" shall mean, as of any date,  the weighted  average
of the rates on overnight  federal  funds  transactions  with the members of the
Federal Reserve System arranged by federal funds brokers,  as published for such
day (or, if such day is not a Business Day, for the next preceding Business Day)
by the Federal  Reserve  Bank of New York,  or, if such rate is not so published
for any day which is a Business Day, the average of the  quotations for such day
on such transactions received by the Administrative Agent from three (3) federal
funds brokers of recognized standing selected by the Administrative Agent.

         "Fee  Letter"  shall mean that  certain  letter  agreement  dated as of
January 15, 1999,  setting forth the applicable  fees to be paid by the Borrower
to the Arrangers  and the  Administrative  Agent in  connection  with the Senior
Commitments.

         "Final  Maturity Date" shall mean July 1, 2007, or such earlier date on
which the payment of all outstanding Tranche C Obligations shall be due (whether
by acceleration or otherwise).

         "Financial  Covenants"  shall  mean  from  time to time  the  financial
covenants applicable to the Borrower from time to time as set forth in Article 9
hereof.

         "Financial  Statements"  shall  have the  meaning  assigned  thereto in
Section 5.1(k) hereof.

         "Five Year PIK  Period"  shall  mean the five (5) year  payment-in-kind
period with respect to interest on the Holdco 2008 Notes issued  pursuant to the
Indenture For 2008 Notes ending on July 14, 2003.


                                        9

<PAGE>



         "Fixed Charge Coverage Ratio" shall mean, on any calculation  date, for
the Borrower and its  Subsidiaries  on a  consolidated  basis,  the ratio of (a)
Annualized EBITDA as at such date, to (b) the amount of Fixed Charges during the
immediately preceding four (4) fiscal quarter period.

         "Fixed  Charges" shall mean,  for any period,  for the Borrower and its
Subsidiaries, on a consolidated basis, the sum of the following for such period:
(a) cash Interest Expense,  plus (b) mandatory,  permanent principal  repayments
with respect to Borrower Debt, plus (c) maintenance Capital  Expenditures,  plus
(d) income taxes payable, plus (e) the amount of any Restricted Payments made to
Holdco.

         "Fixed  Rate  Advance"  shall mean an  Advance of the  Tranche C Loans,
which bears interest at a per annum rate equal to ten percent (10.0%).

         "Funded  Debt"  shall  mean,  with  respect  to  any  Person  as of any
calculation  date,  the sum of the following as of such date:  (a) the principal
amount of all outstanding  Indebtedness  for money borrowed of such Person;  (b)
the principal amount of all  Indebtedness for money borrowed  Guaranteed by such
Person; (c) the stated amount of all letters of credit issued for the account of
such Person;  (d) all Capitalized Lease Obligations of such Person; and (e) if a
Default or Event of Default then exists hereunder or a default then exists under
any Interest Hedge  Agreements,  the net termination  payment  obligations under
such Interest Hedge Agreements.

         "Future Nextel  Towers" shall mean 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  acquire  rights  after  the
Agreement Date, which are sold, transferred or assigned to Tower Sub pursuant to
the terms of the Master Site Commitment Agreement.

         "GAAP"  shall mean  generally  accepted  accounting  principles  in the
United States, consistently applied.

         "Governmental   Authority"  shall  mean  any  government  or  political
subdivision of the United States or any other country or any agency,  authority,
board, bureau, central bank, commission,  department or instrumentality  thereof
or therein,  including,  without limitation,  any court, tribunal, grand jury or
arbitrator,  in each case whether foreign or domestic,  or any entity exercising
executive,  legislative,  judicial, regulatory or administrative functions of or
pertaining to such government or political subdivision.

         "Granting Lender" shall have the meaning assigned thereto in Section
13.5(m).

         "Guarantors"  shall mean,  collectively,  Holdco and each Subsidiary of
the Borrower that  guaranties  payment of the Senior  Obligations  hereunder and
under the other Loan Documents.

         "Guaranty" or "Guaranteed," as applied to an obligation, shall mean and
include (a) a guaranty, direct or indirect, in any manner, of all or any part of
such  obligation,  and (b) any  agreement,  direct or  indirect,  contingent  or
otherwise,  the practical effect of which is to assure in any way the payment or
performance  (or payment of damages in the event of  non-performance)  of all or
any part of such  obligation,  including,  without  limiting the foregoing,  any
reimbursement obligations with respect to outstanding letters of credit.

         "Hazardous Materials" shall mean any substances,  materials,  compounds
or wastes defined,  listed, or subject to control under any Environmental Law as
being hazardous, toxic, extremely hazardous or dangerous.



                                       10

<PAGE>



         "Holdco" shall mean SpectraSite Holdings, Inc., a Delaware corporation.

         "Holdco 2008 Notes" shall mean the 12% Senior  Discount  Notes due 2008
issued by Holdco  pursuant to the terms and conditions of the Indenture For 2008
Notes.

         "Holdco  2009 Notes" shall mean the 11 1/4% Senior  Discount  Notes due
2009 issued by Holdco  pursuant to the terms and conditions of the Indenture For
2009 Notes.

         "Holdco Equity  Documents" shall mean,  collectively,  (a) that certain
Second  Amended and  Restated  Registration  Rights  Agreement,  dated as of the
Agreement  Date;  (b) that  certain  Third  Amended and  Restated  Stockholders'
Agreement,  dated as of the Agreement Date; and (c) that certain Preferred Stock
Purchase  Agreement,  dated  February 10, 1999,  as amended as of the  Agreement
Date.

         "Holdco  Pledge   Agreement"  shall  mean  that  certain  Stock  Pledge
Agreement between Holdco and the Collateral Agent, for the benefit of the Senior
Credit  Parties,  dated as of the Agreement Date, in  substantially  the form of
Exhibit E attached hereto.

         "Indebtedness"  shall mean,  with  respect to any  Person,  and without
duplication,  (a) all items  (except  items of partners'  or members'  equity or
capital stock or surplus or general  contingency or deferred tax reserves) which
in accordance  with GAAP would be included in determining  total  liabilities as
shown on the liability side of a balance sheet of such Person, (b) all direct or
indirect  obligations  of any  other  Person  secured  by any Lien to which  any
property or asset owned by such Person is subject, whether or not the obligation
secured  thereby  shall  have been  assumed,  (c) to the  extent  not  otherwise
included,  any Guaranty and all Capitalized Lease Obligations of such Person and
all  obligations  of such Person with respect to leases  constituting  part of a
sale and lease-back arrangement,  (d) all reimbursement obligations with respect
to  outstanding  letters of credit,  and (e)  obligations  under  Interest Hedge
Agreements.

         "Indemnified   Parties"shall   mean  those   Persons   eligible  to  be
indemnified by Holdco, the Borrower and the Borrower's  Subsidiaries pursuant to
this  Agreement,  and shall include each of the Credit Parties and each of their
respective  employees,   representatives,   officers,   agents,   directors  and
Affiliates.

         "Indenture For 2008 Notes" shall mean that certain  Indenture  dated as
of June 26, 1998 between Holdco,  as issuer,  and United States Trust Company of
New York, as trustee, in respect of the Holdco 2008 Notes.

         "Indenture For 2009 Notes" shall mean that certain  Indenture  dated as
of April 20, 1999, between Holdco, as issuer, and United States Trust Company of
New York, as Trustee in respect of the Holdco 2009 Notes.

         "Indentures"  shall mean  collectively the Indenture For 2008 Notes and
the Indenture For 2009 Notes.

         "Initial  Maturity  Date" shall mean December 31, 2005, or such earlier
date on which the payment of all  outstanding  Senior  Obligations in respect of
the  Revolving  Commitment  and the  Tranche A Loans  shall be due  (whether  by
acceleration or otherwise).

         "Initial  Public  Offering" shall mean the first public offering of the
common Capital Stock of Holdco.


                                       11

<PAGE>



         "Insolvency  Proceeding"  shall have the  meaning  assigned  thereto in
Section 2.15(c) hereof.

         "Intercreditor  Agreement"  shall mean that certain  Intercreditor  and
Subordination  Agreement among the Collateral  Agent,  the Nextel Tenants (other
than Nextel  Partners),  Tower Sub and the  Borrower,  dated as of the Agreement
Date, in substantially the form of Exhibit F attached hereto.

         "Interest  Coverage Ratio" shall mean, on any calculation date, for the
Borrower  and its  Subsidiaries,  on a  consolidated  basis,  the  ratio  of (a)
Annualized  EBITDA  as at  such  date,  to (b)  cash  Interest  Expense  for the
immediately  preceding four (4) fiscal quarter period;  provided,  however, that
for the period ended on (i) September 30, 1999,  Interest  Expense shall be cash
Interest Expense for the immediately  preceding fiscal quarter,  times four (4),
(ii) December 31, 1999,  Interest Expense shall be cash Interest Expense for the
immediately  preceding two (2) fiscal quarter  period,  times two (2), and (iii)
March  31,  2000,  Interest  Expense  shall  be cash  Interest  Expense  for the
immediately preceding three (3) fiscal quarter period, times four-thirds (4/3).

         "Interest Expense" shall mean, for any period, for the Borrower and its
Subsidiaries on a consolidated  basis,  all interest  expense paid or accrued in
respect of Borrower Debt (including,  without limitation, the interest component
of  payments  for such  period in respect  of  Capitalized  Lease  Obligations),
together with recurring fees (but, in any event, including,  without limitation,
all fees due under  Sections 2.4 (b), (c) and (d) hereof)  associated  therewith
(other than fees payable on or prior to the Agreement Date), after giving effect
to any Interest Hedge Agreements, all as determined in accordance with GAAP. For
purposes  of  determining  the  Interest  Coverage  Ratio and the  Fixed  Charge
Coverage Ratio, the amount of any  cash-collateralized,  pre-funded  interest on
the Tranche C Loans in a Pre-Funded  Interest Account shall be excluded from the
calculation of Interest Expense.

         "Interest  Hedge  Agreements"  shall mean any interest rate swap,  cap,
collar,  floor,  caption or swaption  agreements,  or any  similar  arrangements
designed to hedge the risk of variable  interest  rate  volatility  or to reduce
interest costs,  arising at any time between the Borrower,  on the one hand, and
any one or more of the Lenders,  or any other Person (other than an Affiliate of
the  Borrower),  on the other hand,  as such  agreement  or  arrangement  may be
modified, supplemented and in effect from time to time.

         "Investment"  shall mean, with respect to any Person, any loan, advance
or extension  of credit  (other than to  customers,  lessees or licensees in the
ordinary  course  of  business)  by such  Person  to, or any  Guaranty  or other
contingent  liability with respect to the Capital  Stock,  Funded Debt, or other
obligations of, or any contributions to the capital of, any other Person, or any
ownership,  purchase or other  acquisition by such Person of any interest in any
Capital Stock,  limited  partnership  interest,  general  partnership  interest,
limited liability company interest or other securities of any such other Person,
other than an Acquisition;  and "Invest,"  "Investing" or "Invested"  shall mean
the making of an Investment.  "Investment"  shall also include the total cost of
any  future  commitment  or other  obligation  binding  on any Person to make an
Investment or any subsequent Investment.

         "Issuing  Bank"  shall  mean  the  Administrative  Agent  or any of its
affiliates, as issuer of any Letter of Credit hereunder.

         "Joinder  Agreement" shall mean that certain Joinder Agreement dated as
of the Tranche C Initial  Funding Date  executed by each Person having agreed to
fund a portion of the Tranche C


                                       12

<PAGE>



Loans, in substantially the form of Exhibit G attached hereto, pursuant to which
each such  Person  agrees  to join as a party to,  and be bound by the terms and
conditions of, this Agreement and the other Loan Documents applicable to Tranche
C Lenders,  and for all  purposes to become a "Tranche C Lender"  hereunder  and
thereunder.

         "L/C Obligations" shall mean, at any date, the sum of (a) the aggregate
amount then  available to be drawn under all  outstanding  Letters of Credit and
(b) the aggregate amount of drawings under Letters of Credit which have not then
been reimbursed by the Borrower pursuant to Section 2.14(e) hereof.

         "L/C  Participants"  shall  mean with  respect to any Letter of Credit,
collectively,  all of the Lenders which have issued a Revolving Commitment other
than the Issuing Bank.

         "L/C  Participating  Interest" shall mean with respect to any Letter of
Credit (a) in the case of the Issuing Bank with respect thereto, its interest in
such  Letter of Credit and any  Letter of Credit  Application  relating  thereto
after giving effect to the granting of participating  interests therein, if any,
pursuant  hereto  and (b) in the case of each  L/C  Participant,  its  undivided
participating  interest  in such  Letter  of  Credit  and any  Letter  of Credit
Application relating thereto.

         "Lenders" shall mean the financial  institutions  whose names appear as
"Lenders" on the  signature  pages  hereof and any other Person which  becomes a
"Lender"  hereunder after the Agreement Date; and "Lender" shall mean any one of
the foregoing Lenders.

         "Letter of Credit  Application"  shall mean an application in such form
as the Issuing Bank may specify from time to time requesting the Issuing Bank to
issue a Letter of Credit.

         "Letter of Credit Committed Amount" shall mean $15,000,000.

         "Letters of Credit"  shall mean any and all letters of credit issued by
the Issuing  Bank for the account of the  Borrower  pursuant to Section  2.14 of
this Agreement.

         "Leverage Ratio" shall mean, on any calculation  date, the ratio of (a)
Borrower Debt, to (b) Annualized EBITDA.

         "Lien" shall mean,  with respect to any property,  any mortgage,  lien,
pledge,  negative pledge or other agreement not to pledge,  assignment,  charge,
security  interest,  title  retention  agreement,   levy,  execution,   seizure,
attachment,  garnishment or other similar  encumbrance of any kind in respect of
such property,  whether created by statute,  contract,  common law or otherwise,
and whether choate or inchoate, vested or perfected.

         "Loan Documents" shall mean, without  limitation,  this Agreement,  the
Notes (other than the Tranche C Notes), the Fee Letter, the Security  Documents,
the Intercreditor Agreement, all Requests for Advance, all Requests for Issuance
of  Letters  of Credit,  the  Certificate  of  Financial  Condition,  the Use of
Proceeds  Letter,  all  Performance  Certificates,   Letters  of  Credit  issued
hereunder,  all Interest  Hedge  Agreements  with a Lender or any Affiliate of a
Lender, and any other document or agreement or certificate  (including,  without
limitation,  any legal opinion  issued by counsel for the Borrower or any of its
Affiliates  and any  reliance  letter  issued  with  respect  to any such  legal
opinion)  executed or  delivered  in  connection  with or  contemplated  by this
Agreement,  and on and after the  Tranche C Initial  Funding  Date,  shall  also
include the Tranche C Notes.


                                       13

<PAGE>



         "Loans" shall mean,  collectively,  the Revolving Loans, the Term Loans
and the Tranche C Loans.

         "Majority  Lenders"  shall mean (i) prior to the occurrence of an Event
of Default and the termination of unfunded Senior  Commitments,  Lenders the sum
of whose  Revolving  Commitment and Unfunded  Tranche A Commitment  amounts plus
Term Loans  outstanding  equals or exceeds fifty-one percent (51%) of the sum of
such items for all  Lenders,  or (ii) at any time that there  exists an Event of
Default hereunder, and unfunded Senior Commitments have been terminated, Lenders
the total of whose Senior Loans outstanding  equals or exceeds fifty-one percent
(51%) of the  total  principal  amount  of the  Senior  Loans  then  outstanding
hereunder.

         "Managing Agents" shall mean, collectively,  Bank of Montreal,  Chicago
Branch, The Bank of Nova Scotia,  BankBoston,  N.A.,  Dresdner Bank AG, New York
and Grand Cayman  Branches,  Toronto  Dominion  (Texas),  Inc. and Union Bank of
California, N.A.

         "Master Site Commitment  Agreement" shall mean that certain Master Site
Commitment  Agreement,  dated as of the Agreement Date, among Nextel, the Nextel
Tenants (other than Nextel Partners), Tower Parent Corp., Holdco and Tower Sub.

         "Master Site Lease Agreement" shall mean that certain Master Site Lease
Agreement,  dated as of the Agreement Date, among the Nextel Tenants (other than
Nextel Partners) and Tower Sub.

         "Material Contracts" shall have the meaning assigned thereto in Section
5.1(y) hereof.

         "Material  Towers"  shall mean,  as of any date of  determination,  any
Tower or any group or set of Towers wheresoever  located to which more than five
percent  (5%) of the  Borrower's  Annualized  EBITDA for the  twelve  (12) month
period most recently ended is attributable.

         "Materially  Adverse Effect" shall mean (i) any material adverse effect
upon the business, operations,  properties,  condition (financial or otherwise),
prospects,  capitalization,  assets or  liabilities  or results of operations of
Holdco,  the Borrower and the Borrower's  Subsidiaries taken as a whole, or upon
the ability of Holdco,  the Borrower or any of the  Borrower's  Subsidiaries  to
conduct the Tower Operations, or (ii) a material adverse effect upon the binding
nature,  validity, or enforceability of this Agreement,  the Notes and the other
Loan  Documents  or upon the  ability  of  Holdco,  the  Borrower  or any of the
Borrower's  Subsidiaries  to perform the payment  obligations  or other material
obligations under this Agreement or any other Loan Document, or upon the rights,
benefits  or  interests  of the  Lenders and the Tranche C Lenders in and to the
Loans or the rights of the Collateral  Agent in the Collateral;  in either case,
whether resulting from any single act,  omission,  situation,  status,  event or
undertaking,  or taken  together  with other such acts,  omissions,  situations,
statuses, events or undertakings.

         "Maturity  Date" shall mean,  with  respect to all  amounts  owing,  or
Advances made,  under (a) the Revolving  Commitment or the Tranche A Commitment,
the Initial Maturity Date, (b) the Tranche B Commitment,  the Tranche B Maturity
Date, and (c) the Tranche C Loans, the Final Maturity Date.

         "Maximum  Borrowing Base Amount" shall mean, as of any calculation date
during  the  period  from  (a)  the  Agreement   Date  through  June  30,  1999,
$200,000,000,  (b) July 1, 1999 through  September 30, 1999,  $250,000,000,  (c)
October 1, 1999 through December 31, 1999, $300,000,000, and (d) January 1, 2000
through March 31, 2000, $325,000,000,  in each case less the aggregate principal
amount of the Tranche B Loans then outstanding.


                                       14

<PAGE>



         "Merger Agreement" shall mean that certain Agreement and Plan of Merger
dated as of February 10, 1999, as amended on the Agreement  Date,  among Nextel,
Tower Parent Corp., Merger Sub, Tower Sub, the Nextel Tenants (other than Nextel
Partners),   Holdco,   the  Borrower  and  SHI  Merger  Sub,  Inc.,  a  Delaware
corporation.

         "Merger  Sub"  shall  mean  Tower  Merger  Vehicle,  Inc.,  a  Delaware
corporation, which, prior to giving effect to the Tower Sub Merger, is a direct,
wholly-owned  subsidiary of Tower Parent Corp., and which after giving effect to
the  Tower  Sub  Merger,  shall  be a  direct,  wholly-owned  Subsidiary  of the
Borrower.

         "Mortgage" shall mean any mortgage, deed to secure debt, deed of trust,
or  other  instrument  encumbering  or  transferring  title  (in fee  simple  or
leasehold) to real property, in form and substance  substantially similar to the
forms  attached  hereto as Exhibits H-1 and H-2, by which the Borrower or any of
its Subsidiaries  grants a mortgage to the Collateral  Agent, for the benefit of
the Senior  Credit  Parties,  in real estate  owned or leased by the Borrower or
such Subsidiary.

         "Mortgage Default" shall have the meaning assigned thereto in the
Mortgages.

         "Multiemployer Plan" shall have the meaning set forth in Section 4001
(a)(3) of ERISA.

         "Necessary  Authorizations"  shall mean any local zoning ordinances and
any rights,  whether  based upon any  agreement,  statute,  order or  otherwise,
licenses,   authorizations,   permits,   consents,   approvals,   registrations,
certificates,  agreements,  permits or other  rights  filed with,  granted by or
entered into by a federal or state governmental  authority  (including,  without
limitation,  the FAA and the FCC) which permit or authorize the  construction or
maintenance  of a  Tower  or the use of a Tower  by the  Borrower  or any of its
Subsidiaries for wireless communications purposes,  together with any amendment,
modification or replacement with respect thereto.

         "Net Income"  shall mean,  for the Borrower and its  Subsidiaries  on a
consolidated  basis,  for any period,  net income  determined in accordance with
GAAP.

         "Net Proceeds" shall mean, with respect to any sale, lease, transfer or
other  disposition   (including,   without  limitation,   by  casualty  loss  or
condemnation)  of  Assets by the  Borrower  or any of its  Subsidiaries,  or any
issuance by the  Borrower  or any of its  Subsidiaries  of any Capital  Stock or
other debt or equity  securities  (in any  event,  a "Sales  Transaction"),  the
aggregate  amount of cash  received  for such Assets or  securities  (including,
without  limitation,  any  payments  received  in  respect of  covenants  not to
compete,  consulting or management  fees, and any portion of the amount received
in  cash  upon  payment  of  a  buyer  promissory  note  or  other  evidence  of
Indebtedness),  net of  (i)  taxes  payable  with  respect  to  any  such  Sales
Transaction,  (ii)  contingencies  with  respect to any such Sales  Transaction,
appropriately  reserved for by the Borrower or the applicable  Subsidiary  under
GAAP, (iii) reasonable and customary  transaction costs properly attributable to
such Sales  Transaction  and payable by the Borrower or any of its  Subsidiaries
(other  than  to an  Affiliate)  in  connection  with  such  Sales  Transaction,
including, without limitation, sales commissions and underwriting discounts, and
(iv) all  payments  made on any  Indebtedness  which is  secured  by any  assets
subject to such Sales  Transaction in accordance with the terms of any Lien upon
or other security  arrangement of any kind with respect to such Assets, or which
must by its  terms,  or in order to obtain a  necessary  consent  to such  Sales
Transaction  or by Applicable  Law be repaid out of the proceeds from such Sales
Transaction.

         "Net Proceeds Trust" shall have the meaning assigned thereto in Section
2.7(b)(ii) hereof.


                                       15

<PAGE>



         "New Tower"  shall mean each Tower built or acquired by the Borrower or
any of its  Subsidiaries  during the period from the Agreement  Date through the
Revolving Loan Availability Date.

         "Nextel" shall mean Nextel Communications, Inc., a Delaware
corporation.

         "Nextel Acquisition" shall mean the Acquisition of the Tower Assets and
certain build rights pursuant to the Nextel Acquisition Documents.

         "Nextel  Acquisition  Documents" shall mean,  collectively,  the Master
Site  Lease  Agreement,   the  Master  Site  Commitment  Agreement,  the  Nextel
Subordinated Security Agreement,  the Merger Agreement, the Partners Master Site
Lease  Agreement,  the Real Estate Side Letter and the  Nonassignable  Contracts
Agreements.

         "Nextel  Collateral"  shall  mean  the  "Collateral,"  as that  term is
defined in the Nextel Subordinated Security Agreement.

         "Nextel  Partners"  shall  mean  Nextel  Partners  Operating  Corp.,  a
Delaware corporation.

         "Nextel Related Parties" shall mean,  collectively,  Nextel, the Nextel
Tenants and their respective Subsidiaries.

         "Nextel  Subordinated  Lien" shall mean that  certain  Lien  granted by
Tower Sub in favor of Tower  Parent  Corp.  as  secured  party for itself and on
behalf of other  beneficiaries  thereof on the Nextel Collateral pursuant to the
Nextel Subordinated  Security Agreement,  which Lien is subordinated pursuant to
the terms  and  conditions  of the  Intercreditor  Agreement  to the Lien in the
Nextel  Collateral  in favor of the  Collateral  Agent,  for the  benefit of the
Credit Parties.

         "Nextel  Subordinated  Security  Agreement"  shall  mean  that  certain
Security and Subordination  Agreement,  dated as of the Agreement Date,  between
Tower Sub, as assignor,  and Tower Parent Corp., as secured party for itself and
on behalf of other beneficiaries thereof.

         "Nextel Tenants" shall mean, collectively,  Nextel of New York, Inc., a
Delaware  corporation,  Nextel  Communications  of  the  Mid-Atlantic,  Inc.,  a
Delaware  corporation,  Nextel South  Corp.,  a Georgia  corporation,  Nextel of
Texas, Inc., a Texas corporation, Nextel West Corp., a Delaware corporation, and
Nextel  of  California,   Inc.,  a  Delaware  corporation,   each  d/b/a  Nextel
Communications,  Nextel  Partners and each other Nextel  Related Party that is a
tenant under the Master Site Lease  Agreement or the Partners  Master Site Lease
Agreement.

         "Nonassignable Contracts Agreements" shall mean, collectively, all
Nonassignable Contracts Agreements, dated as of the Agreement Date, among a
Nextel Tenant, Tower Parent Corp. and Tower Sub.

         "Non-Disturbance    Agreement"    shall    mean   any    Subordination,
Non-Disturbance  and Attornment  Agreement,  in substantially  the form attached
hereto  as  Exhibit  I,  among  the  Borrower  or any of its  Subsidiaries,  the
Collateral  Agent and a tenant  leasing  space on any Tower from the Borrower or
such Subsidiary.

         "Notes" shall mean,  collectively,  the Revolving Notes, the Term Notes
and the Tranche C Notes.



                                       16

<PAGE>



         "Notice   of   Conversion/Continuation"   shall   mean  a   notice   in
substantially the form of Exhibit J attached hereto.

         "Obligations" shall mean (i) all payment and performance obligations of
every kind,  nature and  description  of Holdco,  the Borrower,  the  Borrower's
Subsidiaries,  and any other obligors to the Credit Parties (or their respective
Affiliates in the case of Interest Hedge Agreements), or any of them, under this
Agreement  and the other Loan  Documents  (including,  without  limitation,  any
interest,  fees, costs, expenses and other charges accruing after any Insolvency
Proceeding commences regardless of whether such interest,  fees, costs, expenses
or  other  charges  are  deemed  allowed  or  recoverable  in  such   Insolvency
Proceeding),  as they may be amended from time to time, or as a result of making
the  Loans,  whether  such  obligations  are  direct or  indirect,  absolute  or
contingent, due or not due, contractual or tortious, liquidated or unliquidated,
arising by operation of law or otherwise, now existing or hereafter arising, and
(ii) the  obligation  to pay an amount equal to the amount of any and all damage
which the Credit Parties (or their respective Affiliates in the case of Interest
Hedge  Agreements),  or any of them, may suffer by reason of a breach by Holdco,
the Borrower,  any of its Subsidiaries or any other obligor,  of any obligation,
covenant  or  undertaking  with  respect  to this  Agreement  or any other  Loan
Document.

         "Other  Operations"  shall mean all  businesses  (other  than the Tower
Operations) of the Borrower and its Subsidiaries, including, without limitation,
to the extent not included in the Tower Operations, their Tower Site acquisition
and Tower Site management businesses.

         "Overadvance"  shall  mean,  at any time  prior to the  Revolving  Loan
Availability Date, the amount of the excess, if any, of the aggregate  principal
amount of the Tranche A Loans then outstanding  over the Maximum  Borrowing Base
Amount then applicable.

         "Participants" shall have the meaning assigned thereto in Section 13.5
(b) hereof.

         "Partners  Master  Site  Lease  Agreement"  shall  mean,  if  and  when
executed,  that certain  Partners Master Site Lease Agreement among Tower Parent
Corp.,  Nextel Partners and its Subsidiaries  (individually  and collectively as
tenants thereunder), Tower Sub and the Landlord Parties (as defined therein) and
until  executed and delivered,  all references  thereto in this Agreement and in
the other Loan Documents shall be deemed to have no force or effect.

         "Payment  Blockage  Notice" shall have the meaning  assigned thereto in
Section 2.15(b)(iii) hereof.

         "Payment  Blockage  Period" shall have the meaning  assigned thereto in
Section 2.15(b)(iii) hereof.

         "Payment Date" shall mean the last day of any Eurodollar Advance
Period.

         "PBGC" shall mean the Pension Benefit Guaranty Corporation, or any
successor thereto.

         "Performance  Certificate" shall mean a certificate of the president or
chief  financial  officer of the Borrower as to its  financial  performance,  in
substantially the form attached hereto as Exhibit K.

         "Permitted  Acquisitions"  shall mean Acquisitions made by the Borrower
or any of its  Subsidiaries  as and to the extent  permitted  under  Section 8.5
hereof.


                                       17

<PAGE>



         "Permitted Debt" shall mean  Indebtedness  permitted to be incurred and
to remain outstanding by Holdco, the Borrower and its Subsidiaries,  pursuant to
Section 8.1 hereof.

         "Permitted  Dispositions"  shall mean the sale or other  disposition of
Towers and Tower Assets by the Borrower or any of its Subsidiaries as and to the
extent permitted under Section 8.5 hereof.

         "Permitted  High-Yield  Securities"  shall  mean,   collectively,   (a)
preferred equity securities issued by the Borrower or Holdco, and (b) other debt
securities  issued by Holdco,  as an "add-on" under the Indentures or otherwise,
upon the Borrower's  demonstration to the Arrangers of pro forma compliance with
this Agreement through the Tranche B Maturity Date;  provided,  however, in each
case,  the terms and conditions of such  securities  (i) shall be  substantially
similar to the terms of the  Indenture  For 2009 Notes or the Indenture For 2008
Notes  with any  deviations  therefrom  not more  onerous  (taken as a whole) on
Holdco or the Borrower than the terms of such Indentures (except for an increase
in the interest rate payable  thereon to the extent  provided in clause  (ii)(A)
below),  (ii) shall provide,  among other things, that (A) neither dividends nor
interest  shall be payable in cash at any time  prior to the  expiration  of the
Five Year PIK Period, unless such dividends or interest, as applicable, are paid
with funds available  therefor in a Pre-Funded  Interest  Account into which has
been funded an amount  sufficient to make payments of dividends or interest,  as
applicable,  on such Permitted High-Yield  Securities for a period ending on the
earlier of (I) the second  anniversary of the date of issuance  thereof and (II)
the expiration of the Five Year PIK Period;  provided,  however,  that if Holdco
issues  securities  that  would  otherwise   constitute   Permitted   High-Yield
Securities and deposits into a Pre-Funded  Interest Account an amount sufficient
to pay dividends or interest, as applicable,  on such securities for a period of
at least three (3) years,  then such securities  shall be deemed to be Permitted
High-Yield  Securities  and after  such  three (3) year  period  Holdco  may pay
dividends or  interest,  as  applicable,  in cash on such  Permitted  High-Yield
Securities  without  regard to the  restriction  in this clause (A); (B) in each
case,  such dividends or interest may be paid at a coupon no greater than 14.5%;
and (C) such  securities  shall have no required  cash  redemptions  (other than
customary change of control redemption provisions) or principal maturities prior
to the  Tranche B  Maturity  Date,  and  (iii) in the case of equity  securities
issued by the Borrower, shall contain no creditor-like rights or remedies.

         "Permitted   Investments"  shall  mean  Investments  described  in  and
permitted to be made under Section 8.2 hereof.

         "Permitted Liens" shall mean, as applied to any Person:

                  (a)      Any Lien in favor of the Collateral Agent given to
secure the Obligations;

                  (b) (i) Liens on real  estate  for real  estate  taxes not yet
delinquent  and (ii)  Liens  for  taxes,  assessments,  judgments,  governmental
charges or levies or claims not yet  delinquent or the  non-payment  of which is
being  diligently  contested in good faith by  appropriate  proceedings  and for
which adequate  reserves have been set aside on such Person's books, but only so
long  as no  foreclosure,  distraint,  sale or  similar  proceedings  have  been
commenced with respect thereto;

                  (c) Liens of  landlords,  carriers,  warehousemen,  mechanics,
laborers and  materialmen  and other  statutory  Liens  incurred in the ordinary
course of business  for sums not yet due or being  diligently  contested in good
faith, if reserves or appropriate provisions shall have been made therefor;



                                       18

<PAGE>



                  (d) Liens  incurred  in the  ordinary  course of  business  in
connection with worker's compensation and unemployment insurance or other social
security programs;

                  (e) Easements, rights-of-way,  restrictions, survey exceptions
and  other  similar  encumbrances  on the  use of  real  property  which  do not
materially interfere with the ordinary conduct of the business of such Person or
materially  detract  from the utility or value of such real  property,  or Liens
incidental  to the conduct of the business of such Person or to the ownership of
its properties which were not incurred in connection with  Indebtedness or other
extensions of credit and which do not in the aggregate  materially  detract from
the value of such properties or materially  impair their use in the operation of
the business of such Person;

                  (f)      the Nextel Subordinated Lien;

                  (g) Liens securing  conditional sale, rental or purchase money
obligations permitted to be incurred pursuant to Section 8.1(j) hereof, but only
in the property that is the subject of such obligation;

                  (h) Liens  granted  to secure  the  performance  of letters of
credit,  bids,  tenders,  contracts,  leases,  public or statutory  obligations,
surety,  customs,  appeal and  performance  bonds and other similar  obligations
incurred in the ordinary  course of business and not incurred in connection with
the borrowing of money;

                  (i)      leasehold and license rights and interests granted to
third parties in respect
of the Tower Assets;

                  (j)      Liens in favor of the Borrower or any wholly-owned
Subsidiary of the Borrower;

                  (k) any  interest  in or  title of a  lessor  to any  property
subject to a Capitalized  Lease Obligation  permitted to be incurred pursuant to
Section 8.1(c) hereof;

                  (l) normal  provisions in agreements  and leases that restrict
the assignment of such agreement or lease;

                  (m) negative  pledges and other agreements not to create Liens
contained in the Indentures,  any Permitted High Yield  Securities and any other
Permitted Debt;

                  (n) Liens on Tower Sites  leased by the Borrower or any of its
Subsidiaries granted by the fee owner thereof; and

                  (o) the right of first  refusal set forth in Section  19(c) of
each of the Master  Site Lease  Agreement  and the  Partners  Master  Site Lease
Agreement.

         "Person"  shall  mean an  individual,  corporation,  limited  liability
company,   association,   partnership,   joint  venture,  trust  or  estate,  an
unincorporated organization, a government or any agency or political subdivision
thereof, or any other entity.

         "Plan" shall mean, with respect to any Person, an employee benefit plan
within the  meaning of  Section  3(3) of ERISA  sponsored  or  maintained  by or
contributed  to by such Person for the benefit of employees of such Person,  but
excluding any Multiemployer Plan.



                                       19

<PAGE>



         "Pre-Funded  Interest  Account"  shall  mean an escrow  account or cash
collateral  account  maintained  in the name of the  Borrower or Holdco with the
Administrative  Agent or with a trustee in respect of any  Permitted  High-Yield
Securities into which has been directly funded a portion of the Tranche C Loans,
or a portion of the Net  Proceeds of the  issuance of any  Permitted  High-Yield
Securities by the Borrower or Holdco;  provided that all funds on deposit in any
such account shall be available  solely for the payment of such interest or such
dividends, as applicable.

         "Prime Rate" shall mean, at any time,  the rate of interest  adopted by
the Administrative Agent as its reference rate for the determination of interest
rates for loans of varying  maturities in United States dollars to United States
residents of varying degrees of  creditworthiness  and being quoted at such time
by  the  Administrative  Agent  as its  "prime  rate."  The  Prime  Rate  is not
necessarily   the  lowest  rate  of  interest   charged  to   borrowers  of  the
Administrative Agent or its Affiliates.

         "Projections" shall have the meaning assigned thereto in Section 4.1(e)
hereof.

         "Property"  shall mean any real property or personal  property,  plant,
building,  facility,  structure,  underground  storage tank or unit,  equipment,
inventory  or other  asset  owned,  leased or operated by Borrower or any of its
Subsidiaries  (including,  without  limitation,  any  surface  water  thereon or
adjacent thereto, and soil and groundwater thereunder).

         "Purchase Price" shall mean, with respect to each Permitted Acquisition
and each Permitted  Disposition,  the total consideration  payable in connection
with such Permitted  Acquisition or Permitted  Disposition,  as the case may be,
whether  payable in cash,  securities,  by a note or other  property,  or by the
assumption of Indebtedness (including, without limitation, all forms of deferred
compensation, such as non-compete, consulting and similar agreements).

         "Real Estate Side Letter"  shall mean that  certain  Letter  Agreement,
dated as of the Agreement Date, from Nextel and agreed to by Tower Parent Corp.,
Merger Sub, Tower Sub, each of the Nextel Tenants, the Borrower,  Holdco and SHI
Merger Sub, Inc.

         "Register" shall have the meaning assigned thereto in Section 13.5(d)
hereof.

         "Remaining Revolving Commitment" shall mean, as of any date, the amount
of the Revolving  Commitment  less the aggregate  amount of the L/C  Obligations
then outstanding.

         "Reportable  Event" shall have the meaning set forth in Section 4043 of
ERISA,  other than an event for which the reporting  requirement has been waived
by regulations promulgated under such Section.

         "Request for Advance" shall mean a certificate designated as a "Request
for Advance,"  signed by an Authorized  Signatory of the Borrower  requesting an
Advance  hereunder,  which  shall  be in  substantially  the form of  Exhibit  L
attached  hereto and shall,  among  other  things,  (i)  specify the date of the
Advance,  which shall be a Business Day, the amount of the Advance,  the type of
Advance,  and,  with respect to a Eurodollar  Advance,  the  Eurodollar  Advance
Period  selected by the Borrower,  (ii) state that there shall not exist, on the
date of the requested  Advance both before and after giving effect thereto,  any
Default or Event of  Default,  and (iii) the use of the  proceeds of the Advance
being requested.

         "Request for Issuance of Letter of Credit"  shall mean any  certificate
signed by an Authorized  Signatory of the Borrower,  which  certificate  will be
denominated a "Request for


                                       20

<PAGE>



Issuance of Letter of Credit" and shall be in  substantially  the form  attached
hereto as Exhibit M, and shall,  among other things, (i) specify the beneficiary
of the  proposed  Letter of Credit,  the  purpose  of the Letter of Credit,  the
proposed  date of  issuance  of the Letter of Credit,  which shall be a Business
Day,  and the  documents  which must be  presented  to draw under such Letter of
Credit (including,  without limitation, any documents which the Issuing Bank may
require),  (ii) include, as an attachment,  a Letter of Credit Application,  and
(iii)  state that there  shall not exist,  on the date of the  request and after
giving  effect to the issuance of the Letter of Credit,  any Default or Event of
Default hereunder.

         "Required  Tranche C Lenders"  shall mean  Tranche C Lenders the sum of
whose Tranche C Loans  outstanding  equals or exceeds fifty-one percent (51%) of
the total principal amount of the Tranche C Loans then outstanding hereunder.

         "Restricted   Payment"   shall   mean  (a)  any   direct  or   indirect
distribution,  dividend, redemption or other payment to any Person on account of
any general or limited  partnership  interest  in, or ownership of any shares of
Capital  Stock,  or other  securities  of or equity  interests in,  Holdco,  the
Borrower or any of the Borrower's Subsidiaries;  (b) any payment of principal of
or interest on any  Indebtedness  of any of Holdco,  the  Borrower or any of the
Borrower's  Subsidiaries  in favor of any Affiliate  other than pursuant to this
Agreement or the other Loan  Documents;  or (c) any payment under any management
or  consulting  agreement  or other  similar  agreement or  arrangement  with an
Affiliate of the Borrower not entered into in the ordinary course of business.

         "Restricted  Purchase"  shall  mean  any  payment  on  account  of  the
purchase,  redemption  or other  acquisition  or  retirement  of any  general or
limited partnership  interest in, or shares of Capital Stock or other securities
of or  equity  interests  in,  Holdco,  the  Borrower  or any of the  Borrower's
Subsidiaries,  including,  without  limitation,  any warrants or other rights or
options to acquire shares of Capital Stock or  partnership  interests of Holdco,
the Borrower or any of the Borrower's Subsidiaries.

         "Revolving Commitment" shall mean the several obligations of certain of
the Lenders to advance the sum of up to $50,000,000 to the Borrower, on or after
the Agreement Date, in accordance  with their  respective  Revolving  Commitment
Ratios and as such amount may be reduced from time to time,  all pursuant to the
terms hereof.

         "Revolving  Commitment  Ratios"  shall  mean the  percentages  in which
certain of the  Lenders are  severally  bound to make  Advances to the  Borrower
under the Revolving  Commitment,  which as of the Agreement  Date, are set forth
(together with dollar amounts thereof) on Schedule 1 attached hereto.

         "Revolving  Loan  Availability  Date"  shall mean the date on which the
Borrower  shall request a Revolving  Loan be made hereunder and shall provide to
the  Arrangers  and  the  Lenders  calculations   demonstrating  the  Borrower's
pro-forma compliance with the Leverage Ratio.

         "Revolving  Loans"  shall mean,  collectively,  the amount  advanced by
certain of the Lenders to the Borrower  under the Revolving  Commitment,  not to
exceed the amount of the  Revolving  Commitment,  and evidenced by the Revolving
Notes.

         "Revolving Notes" shall mean those certain  revolving  promissory notes
in the aggregate  original  principal  amount of $50,000,000,  one issued by the
Borrower to each of the Lenders  issuing a Revolving  Commitment  in  accordance
with each such Lender's Revolving


                                       21

<PAGE>



Commitment  Ratio,  each one  substantially  in the form of  Exhibit N  attached
hereto,  and any  extensions,  modifications,  renewals  or  replacements  of or
amendments to any of the foregoing.

         "Sales  Transaction"  shall have the  meaning  assigned  thereto in the
definition of "Net Proceeds".

         "Securities Act" shall mean the Securities Act of 1933, as amended, and
the rules and regulations promulgated thereunder.

         "Security Agreement" shall mean that certain Security Agreement between
the  Borrower and the  Collateral  Agent,  for the benefit of the Senior  Credit
Parties,  dated as of the Agreement Date, in substantially the form of Exhibit O
attached hereto.

         "Security  Documents"  shall mean,  without  limitation,  the  Security
Agreement,  the Borrower Pledge Agreement, the Trademark Security Agreement, the
Assignment of Acquisition  Documents,  the Subsidiary  Guaranty,  the Subsidiary
Pledge Agreement,  the Subsidiary Security Agreement (Senior  Obligations),  the
Holdco Pledge Agreement,  all Mortgages,  all  Non-Disturbance  Agreements,  any
other agreement or instrument providing Collateral for the Obligations,  whether
now or hereafter in existence,  and any filings,  instruments,  agreements,  and
documents  related  thereto or to this  Agreement,  and providing the Collateral
Agent  with  Collateral  for the  Obligations,  and on and after  the  Tranche C
Initial  Funding Date shall also include the Tower Sub Guaranty,  the Subsidiary
Security Agreement (Tranche C Obligations) and the Tranche C Pre-Funded Interest
Account Pledge Agreement.

         "Security  Interest"  shall  mean all Liens in favor of the  Collateral
Agent created  hereunder or under any of the Security  Documents,  as and to the
extent set forth therein and in Section 2.15 hereof, to secure the Obligations.

         "Senior   Commitments"   shall  mean,   collectively,   the   Revolving
Commitment, the Tranche A Commitment and the Tranche B Commitment.

         "Senior  Credit  Parties"  shall mean the Credit Parties other than the
Tranche C Lenders.

         "Senior Loans" shall mean, collectively the Revolving Loans and the
Term Loans.

         "Senior Notes" shall mean, collectively, the Revolving Notes and the
Term Notes.

         "Senior  Obligations"  shall mean any and all  Obligations  owed to the
Senior  Credit  Parties  arising in respect  of the Senior  Commitments  and the
Senior Loans.

         "Shareholders"  shall mean the  shareholders  of Holdco which as of the
Agreement Date are as set forth on Schedule 5.1(c) attached hereto.

         "SPC" shall have the meaning assigned thereto in Section 13.5(m).

         "Subsidiary"  shall mean, as applied to any Person,  any corporation of
which  more than  fifty  percent  (50%) of the  outstanding  stock  (other  than
directors' qualifying shares) having ordinary voting power to elect its board of
directors,  regardless of the existence at the time of a right of the holders of
any class or classes of securities of such  corporation  to exercise such voting
power by reason of the happening of any contingency, or any partnership or other
entity of which more than fifty percent (50%) of the outstanding  partnership or
other equity interests, is at


                                       22

<PAGE>



the  time  owned  directly  or  indirectly  by  such  Person,  or by one or more
Subsidiaries of such Person,  or by such Person and one or more  Subsidiaries of
such Person.

         "Subsidiary  Guaranty"  shall  mean that  certain  Subsidiary  Guaranty
Agreement  issued by each  Subsidiary of the Borrower in favor of the Collateral
Agent,  for the benefit of the Senior Credit Parties,  dated as of the Agreement
Date, in substantially  the form of Exhibit P attached  hereto,  and any similar
guaranty or any guaranty supplement delivered pursuant to Section 6.16 hereof.

         "Subsidiary Pledge Agreement" shall mean that certain Subsidiary Pledge
Agreement  between each Subsidiary of the Borrower having one or more of its own
corporate  Subsidiaries and the Collateral  Agent, for the benefit of the Senior
Credit Parties,,  dated as of the Agreement Date, in  substantially  the form of
Exhibit Q  attached  hereto,  and any  similar  pledge  agreement  or any pledge
agreement supplement delivered pursuant to Section 6.16 hereof.

         "Subsidiary  Security Agreement (Senior  Obligations)"  shall mean that
certain Subsidiary Security Agreement (Senior  Obligations)  between each of the
Borrower's  Subsidiaries and the Collateral Agent, for the benefit of the Senior
Credit  Parties,  dated as of the Agreement Date, in  substantially  the form of
Exhibit R-1 attached hereto,  and any similar security agreement or any security
agreement supplement delivered pursuant to Section 6.16 hereof.

         "Subsidiary  Security Agreement (Tranche C Obligations)" shall mean the
Subsidiary Security Agreement (Tranche C Obligations)  between Tower Sub and the
Collateral Agent, for the benefit of the Tranche C Lenders, in substantially the
form of Exhibit R-2 attached  hereto,  to be entered into in connection with the
funding of the initial Advance of the Tranche C Loans, if applicable.

         "Term  Loans"  shall  mean,  collectively,  the Tranche A Loans and the
Tranche B Loans.

         "Term Notes" shall mean the Tranche A Notes and the Tranche B Notes.

         "Tower" shall mean any wireless communications tower owned by the
Borrower or any
of its Subsidiaries.

         "Tower  Assets"  shall mean assets and  businesses  constituting  Tower
Sites, Towers or "build to suit" businesses of the Borrower or any Subsidiary of
the  Borrower  located in the  United  States,  and any and all Assets  relating
thereto (including,  without limitation, tower structures,  concrete pads, tower
lighting and fences,  interests in real property  related  thereto,  third party
tenant leases and permits and documents related thereto).

         "Tower  Operations"  shall  mean the  ownership,  leasing,  management,
"build-out"  and  construction  businesses of the Borrower and its  Subsidiaries
relating to the Towers.

         "Tower  Parent  Corp."  shall  mean  Tower  Parent  Corp.,  a  Delaware
corporation.

         "Tower Site" shall mean each parcel of real  property,  owned or leased
by the  Borrower  or any of its  Subsidiaries  pursuant  to a Tower  Site  Lease
Agreement,  on which the Borrower or any of its Subsidiaries  owns,  operates or
maintains a Tower.

         "Tower Site Lease Agreement" shall mean each lease for real property to
which the Borrower or any of its  Subsidiaries  is a party pursuant to which the
Borrower or such Subsidiary leases a Tower Site.


                                       23

<PAGE>



         "Tower  Space  Lease  Agreement"  shall  mean any  lease  or  sub-lease
agreement to which the Borrower or any of its  Subsidiaries  is a party pursuant
to which the Borrower or such Subsidiary leases or sub-leases  platform space on
Towers  and space on other  communications  sites  and the  right to use  and/or
benefit from related improvements.

         "Tower Sub" shall mean Tower Asset Sub,  Inc., a Delaware  corporation,
and after  giving  effect to the Nextel  Acquisition  on the  Agreement  Date, a
wholly-owned Subsidiary of the Borrower.

         "Tower Sub Guaranty" shall mean that certain Guaranty  Agreement (Tower
Sub) issued by Tower Sub in favor of the  Collateral  Agent,  for the benefit of
the  Tranche C  Lenders,  dated as of the  Tranche C Initial  Funding  Date,  in
substantially  the form of Exhibit S  attached  hereto,  to be  entered  into in
connection  with the funding of the initial  Advance of the Tranche C Loans,  if
applicable.

         "Tower Sub  Merger"  shall mean the merger of SHI Merger Sub,  Inc.,  a
Delaware  corporation,  with and into Merger Sub in  connection  with the Nextel
Acquisition.

         "Trademark  Security  Agreement"  shall  mean  that  certain  Trademark
Security  Agreement  between the  Borrower  and the  Collateral  Agent,  for the
benefit  of the  Senior  Credit  Parties,  dated as of the  Agreement  Date,  in
substantially  the form of Exhibit T attached hereto,  and any similar agreement
delivered pursuant to Section 6.16 hereof.

         "Tranche A Commitment" shall mean the several obligations of certain of
the Lenders to advance the sum of up to  $300,000,000  to the Borrower not later
than March 31, 2002, in accordance  with their  respective  Tranche A Commitment
Ratios, and as such amount may be reduced from time to time, all pursuant to the
terms hereof.

         "Tranche  A  Commitment  Ratios"  shall mean the  percentages  in which
certain of the  Lenders are  severally  bound to make  Advances to the  Borrower
under the Tranche A Commitment,  which,  as of the Agreement Date, are set forth
(together with dollar amounts thereof) on Schedule 1 attached hereto.

         "Tranche A Loans"  shall mean,  collectively,  the amounts  advanced by
certain of the Lenders to the Borrower  under the Tranche A  Commitment,  not to
exceed the amount of the Tranche A  Commitment,  and  evidenced by the Tranche A
Notes.

         "Tranche A Notes" shall mean those  certain term notes in the aggregate
original principal amount of $300,000,000, one issued by the Borrower to each of
the Lenders issuing a Tranche A Commitment in accordance with each such Lender's
Tranche A  Commitment  Ratio,  each one  substantially  in the form of Exhibit U
attached hereto, and any extensions,  modifications, renewals or replacements of
or amendments to any of the foregoing.

         "Tranche B Commitment" shall mean the several obligations of certain of
the  Lenders to advance  the sum of up to  $150,000,000  to the  Borrower on the
Agreement Date in accordance with their respective  Tranche B Commitment Ratios,
all pursuant to the terms hereof.

         "Tranche  B  Commitment  Ratios"  shall mean the  percentages  in which
certain of the  Lenders are  severally  bound to make  Advances to the  Borrower
under the Tranche B Commitment, which, as of the Agreement Date and after giving
effect to any Assignment and Assumption  Agreement effective as of the Agreement
Date,  are set forth  (together  with  dollar  amounts  thereof)  on  Schedule 1
attached hereto.



                                       24

<PAGE>



         "Tranche B Loans"  shall  mean,  collectively,  the amount  advanced by
certain of the Lenders to the Borrower  under the Tranche B  Commitment,  not to
exceed the amount of the Tranche B  Commitment  and  evidenced  by the Tranche B
Notes.

         "Tranche B Maturity  Date" shall mean June 30,  2006,  or such  earlier
date on which the payment of all  outstanding  Senior  Obligations in respect of
the Tranche B Loans shall be due (whether by acceleration or otherwise).

         "Tranche B Notes" shall mean those  certain term notes in the aggregate
original principal amount of $150,000,000, one issued by the Borrower to each of
the Lenders issuing a Tranche B Commitment in accordance with each such Lender's
Tranche B  Commitment  Ratio,  each one  substantially  in the form of Exhibit V
attached hereto, and any extensions,  modifications, renewals or replacements of
or amendments to any of the foregoing.

         "Tranche C Credit  Ratios"  shall mean with  respect to each Advance of
the Tranche C Loans,  the  percentages  in which the Tranche C Lenders  agree to
make such  Advance to the  Borrower,  as  specified  by written  notice from the
Tranche C Representative to the Administrative  Agent prior to the date on which
such Advance of the Tranche C Loans is funded.

         "Tranche C Default"  shall mean any of the events  specified in Section
10.3(a),  provided that any  requirement for notice or lapse of time or both has
been satisfied.

         "Tranche  C  Initial  Funding  Date"  shall  mean the date on which the
initial Advance of the Tranche C Loans is funded.

         "Tranche C Lenders" shall mean, collectively, WCAS and any other Person
which  becomes a "Tranche C Lender"  hereunder  after the  Agreement  Date;  and
"Tranche C Lender" shall mean any one of the foregoing Tranche C Lenders.

         "Tranche C Loans" shall mean, collectively,  the amounts advanced, from
time to time in the sole  discretion of the Tranche C Lenders,  by the Tranche C
Lenders to the Borrower, to be evidenced by the Tranche C Notes.

         "Tranche  C  Notes"shall  mean  term  notes in the  aggregate  original
principal  amount of the Tranche C Loans,  one issued by the Borrower to each of
the Tranche C Lenders in an amount equal to such  Tranche C Lender's,  Tranche C
Credit Ratio times the aggregate  amount of each Advance of the Tranche C Loans,
each one  substantially  in the  form of  Exhibit  W  attached  hereto,  and any
extensions,  modifications,  renewals or replacements of or amendments to any of
the foregoing.

         "Tranche C Obligations"  shall mean any and all Obligations owed to the
Tranche C Lenders  arising  in  respect  of the  Tranche  C Loans  (which  shall
include,  despite  anything  which may be construed  to the  contrary  contained
herein,  the  amount  of any  Capitalized  Interest),  all of  which  Tranche  C
Obligations shall rank pari passu with each other.

         "Tranche C Pre-Fund  Period"  shall mean the period  commencing  on the
Tranche C Initial  Funding  Date and  ending on the  second  anniversary  of the
Tranche C Initial Funding Date.

         "Tranche C Pre-Funded  Interest Account" shall mean the cash-collateral
Pre-Funded  Interest  Account,  in which the Collateral Agent has been granted a
Lien in favor of the  Tranche C  Lenders,  having  on  deposit  funds  which are
available  solely to make  payments  of  interest  on the  Tranche C Loans for a
period of two (2) years from the Agreement Date (and payment of


                                       25

<PAGE>



principal of, and interest on, the Tranche C Loans upon the Final  Maturity Date
or in the event of acceleration of the Tranche C Obligations pursuant to Section
10.3(b) hereof and with respect to which the Collateral  Agent,  for the benefit
of the Tranche C Lenders, has been granted a first priority Lien.

         "Tranche C Pre-Funded  Interest  Account Pledge  Agreement"  shall mean
that certain Deposit Account Pledge  Agreement dated as of the Tranche C Initial
Funding Date between the Borrower and the Collateral  Agent,  for the benefit of
the Tranche C Lenders.

         "Tranche C Representative" shall mean WCAS.

         "Transferee" shall have the meaning assigned thereto in Section 13.5(f)
 hereof.

         "Unfunded  Tranche A Commitment"  shall mean, as of any date during the
period from the Agreement Date through March 31, 2002, the amount of the Tranche
A Commitment  less the  aggregate  principal  amount of the Tranche A Loans then
outstanding.

         "Use of  Proceeds  Letter"  shall  mean that  certain  Use of  Proceeds
Letter, substantially in the form of Exhibit X attached hereto, delivered to the
Credit Parties on the Agreement Date pursuant to Article 4 hereof.

         "Voided  Payment"  shall have the meaning  assigned  thereto in Section
2.15(j) hereof.

         "Voting  Stock"  shall  mean  all  classes  of  Capital  Stock or other
interests,  including  partnership  interests,  of a Person then outstanding and
normally entitled, without regard to the occurrence of any contingency,  to vote
in the election of directors, managers, or trustee thereof.

         "WCAS" shall mean WCAS Capital  Partners III, L.P., a Delaware  limited
partnership.

         "Welsh" shall mean, collectively, Welsh, Carson, Anderson & Stowe VIII,
L.P.,  a Delaware  limited  partnership,  WCAS  Information  Partners,  L.P.,  a
Delaware  limited  partnership,  WCAS and each of  their  respective  individual
partners.

         "Whitney" shall mean, J. H. Whitney Mezzanine Fund, L.P., a Delaware
limited  partnership,   Whitney  Equity  Partners,   L.P.,  a  Delaware  limited
partnership,  J. H.  Whitney  III,  L.P., a Delaware  limited  partnership,  and
Whitney Strategic Partners III, L.P., a Delaware limited partnership.

         Each  definition  of an agreement in this Article 1 shall  include such
instrument or agreement as amended, restated, supplemented or otherwise modified
from time to time, and except where the context otherwise requires,  definitions
imparting  the singular  shall  include the plural and vice versa.  Except where
otherwise  specifically  restricted,  reference  to a party  to a Loan  Document
includes that party and its  successors  and assigns.  An Event of Default shall
"exist",  "continue"  or be  "continuing"  until such Event of Default  has been
waived in writing in accordance with Section 13.12 hereof. All terms used herein
which are defined in Article 9 of the Uniform  Commercial  Code in effect in the
State of New York on the date hereof and which are not otherwise  defined herein
shall have the same meanings herein as set forth therein.  All accounting  terms
used  herein  without  definition  shall  be used as  defined  under  GAAP.  All
financial  calculations  hereunder shall, unless otherwise stated, be determined
for the Borrower on a consolidated basis with its Subsidiaries.



                                       26

<PAGE>



                                    ARTICLE 2

                                      Loans

         Section 2.1 The Loans.  Subject to the terms and  conditions of, and in
reliance upon the representations and warranties made in, this Agreement and the
other  Loan  Documents,  the  Lenders  have  extended  and agree,  severally  in
accordance  with their  respective  Commitment  Ratios and not jointly,  to make
Senior Loans to the Borrower in an aggregate principal amount not to exceed Five
Hundred Million Dollars ($500,000,000).

         (a) The  Revolving  Loans.  The Lenders  listed on Schedule 1 as having
issued  a  Revolving  Commitment  agree,  severally  in  accordance  with  their
respective  Revolving  Commitment  Ratios  and not  jointly,  upon the terms and
subject  to the  conditions  of this  Agreement,  to  lend  and  re-lend  to the
Borrower,  on and after the Revolving Loan  Availability  Date, but prior to the
Initial  Maturity Date,  amounts which,  in the aggregate,  do not exceed at any
time the amount of the Remaining Revolving Commitment.  Subject to the terms and
conditions  hereof and prior to the Initial  Maturity  Date,  Advances under the
Revolving  Commitment  may be  repaid  and  reborrowed  from  time  to time on a
revolving  basis or may be  continued  or  converted  pursuant  to a  Notice  of
Conversion/Continuation as provided in Section 2.2 hereof.

         (b) The  Tranche A Loans.  The  Lenders  listed on Schedule 1 as having
issued a  Tranche  A  Commitment  agree,  severally  in  accordance  with  their
respective  Tranche A  Commitment  Ratios  and not  jointly,  upon the terms and
subject to the  conditions of this  Agreement,  to lend to the Borrower,  on and
after  the  Agreement  Date  and on or  prior to March  31,  2002,  in  multiple
Advances,  an aggregate amount not to exceed (i) from the Agreement Date through
the Revolving  Loan  Availability  Date,  the lesser of (A) the  Borrowing  Base
Amount or (B) the Tranche A  Commitment,  and (ii) from and after the  Revolving
Loan  Availability  Date,  (A) the Tranche A Commitment  less (B) the  aggregate
amount of any Tranche A Loans advanced prior to the Revolving Loan  Availability
Date.  After the Agreement Date,  Advances under the Tranche A Commitment may be
continued  or  converted  pursuant  to a Notice  of  Conversion/Continuation  as
provided in Section 2.2 hereof; provided, however, there shall be no increase in
the aggregate principal amount outstanding under the Tranche A Commitment at any
time after March 31, 2002. Amounts repaid under the Tranche A Commitment may not
be reborrowed. If at any time prior to the Revolving Loan Availability Date, the
aggregate  principal  amount of the  Tranche  A Loans  outstanding  exceeds  the
Maximum  Borrowing  Base  Amount,   such  Tranche  A  Loans  shall  nevertheless
constitute  Obligations  that are secured by the  Collateral and are entitled to
all benefits thereof.

         (c) The  Tranche B Loans.  The  Lenders  listed on Schedule 1 as having
agreed to make Tranche B Loans shall,  severally  and in  accordance  with their
respective  Tranche B  Commitment  Ratios  and not  jointly,  upon the terms and
subject  to the  conditions  of  this  Agreement,  lend to the  Borrower  on the
Agreement Date, an amount equal to the Tranche B Commitment. After the Agreement
Date,  Advances  under the Tranche B  Commitment  may be  continued or converted
pursuant  to a Notice of  Conversion/Continuation  as  provided  in Section  2.2
hereof; provided, however, there shall be no increase in the aggregate principal
amount of the Tranche B Loans  outstanding at any time after the Agreement Date.
Amounts repaid under the Tranche B Commitment may not be reborrowed.

         (d) The Tranche C Loans.  Subject to the prior  consent of the Majority
Lenders, the Tranche C Lenders shall, upon the request of the Borrower, in their
sole  discretion,  severally and in accordance with their  respective  Tranche C
Credit Ratios and not jointly,  upon the terms and subject to the  conditions of
this Agreement, lend to the Borrower on and after the Tranche C



                                       27

<PAGE>



Initial Funding Date, and on or prior to the third  anniversary of the Agreement
Date, in one or more Advances,  the amount of the Tranche C Loans which shall be
determined by the Majority Lenders, in their sole discretion, on or prior to the
Tranche C Initial  Funding Date.  After the third  anniversary  of the Agreement
Date, there shall be no increase in the aggregate  principal amount of Tranche C
Loans  outstanding,  except with respect to any Capitalized  Interest under this
Agreement. Tranche C Loans which have been repaid may not be reborrowed.

         (e) The  Letters of Credit.  Notwithstanding  that the  Revolving  Loan
Availability Date may not have occurred,  the Issuing Bank agrees,  prior to the
Initial  Maturity Date and upon the terms and subject to the  conditions of this
Agreement,  to issue from time to time for the account of the Borrower,  Letters
of  Credit  to such  beneficiaries  as shall be  designated  in  writing  by the
Borrower to the Issuing Bank, up to the limit of the Letter of Credit  Committed
Amount.  If at any time prior to the Revolving Loan  Availability Date a draw is
made  under any  Letter  of Credit  issued  hereunder,  prior to the  Borrower's
reimbursement  of the Issuing Bank for the full amount of such draw,  the amount
of such draw shall  constitute an Obligation  that is secured by the  Collateral
and is entitled to all benefits thereof.

         (f) Use of  Proceeds.  The  proceeds  of the Loans shall be used (i) to
finance   the   Nextel   Acquisition,   (ii)   to   provide   funding   for  the
construction/development,  management,  build-out and  Acquisition of Towers and
Tower  Sites,  and (iii) for  general  corporate  purposes  (including,  without
limitation,  fees  and  expenses  relating  to the  Nextel  Acquisition  and the
transactions  contemplated by this Agreement and the other Loan  Documents).  On
the date of the funding of any Advance of the Tranche C Loans, a portion of such
Advance in an  aggregate  amount  equal to interest on such  Advance  during the
Tranche C  Pre-Fund  Period  shall be funded on the date of such  Advance to the
Tranche C Pre-Funded  Interest  Account and made solely  available  for the cash
payment of  interest  charges  when due on the  Tranche C Loans which shall have
accrued on or before  the  second  (2nd)  anniversary  of the  Tranche C Initial
Funding Date, and principal and interest  repayment upon the Final Maturity Date
or in the event of acceleration of the Tranche C Obligations pursuant to Section
10.3(b) hereof.

         Section 2.2       Manner of Borrowing and Disbursement.

         (a) Choice of Interest  Rate,  Etc. Any Advance (i) under the Revolving
Commitment (except with respect to Advances in reimbursement of amounts advanced
to beneficiaries  under Letters of Credit,  which Advances shall in all cases be
Base Rate Advances initially) shall, at the option of the Borrower, be made as a
Base Rate Advance or a Eurodollar  Advance,  (ii) under the Tranche A Commitment
shall,  at the  option  of the  Borrower,  be made as a Base Rate  Advance  or a
Eurodollar Advance, (iii) under the Tranche B Commitment shall, at the option of
the Borrower,  be made as a Base Rate Advance or a Eurodollar Advance,  and (iv)
as Tranche C Loans  shall be made as a Fixed Rate  Advance;  provided,  however,
that (i) if the Borrower fails to give the  Administrative  Agent written notice
specifying whether a Eurodollar Advance is to be repaid,  continued or converted
on a Payment  Date,  such  Eurodollar  Advance shall be converted to a Base Rate
Advance on such Payment Date,  and (ii) the Borrower may not select a Eurodollar
Advance  if, at the time of such  selection,  a Default or Event of Default  has
occurred  and is  continuing.  All  Advances  of the  Senior  Loans  made on the
Agreement  Date shall bear interest as Base Rate  Advances.  Any notice given to
the Administrative  Agent in connection with a requested Advance hereunder shall
be given to the  Administrative  Agent  prior to 10:00  a.m.  (New York time) in
order for such Business Day to count toward the minimum  number of Business Days
required.


                                       28

<PAGE>



         (b)      Base Rate Advances.

                  (i) Initial and Subsequent  Advances.  The Borrower shall give
the  Administrative  Agent in the case of Base Rate Advances,  irrevocable prior
written  notice not later  than  10:00 a.m.  (New York time) on the date of such
Advance in the form of a Request for  Advance,  or  telephonic  notice  followed
immediately  by a Request for Advance;  provided,  however,  that the Borrower's
failure to confirm any  telephonic  notice with a Request for Advance  shall not
invalidate any notice so given; and provided, further, that no such notice shall
be required in connection with the making of a Base Rate Advance to repay a draw
under a Letter of Credit.

                  (ii) Repayments and Conversions.  The Borrower may (A) upon at
least  one  (1)  Business  Days'   irrevocable   prior  written  notice  to  the
Administrative  Agent, repay or prepay a Base Rate Advance, or (B) upon at least
three (3) Business Days' irrevocable prior written notice to the  Administrative
Agent in the  form of a  Notice  of  Conversion/Continuation,  convert  all or a
portion of the principal amount thereof to one or more Eurodollar  Advances.  On
the date indicated by the Borrower, such Base Rate Advance shall be so repaid or
converted.

                  (iii) Miscellaneous.  Notwithstanding any term or provision of
this  Agreement  which may be construed to the contrary,  each Base Rate Advance
(except  any  Base  Rate  Advance  in   reimbursement  of  amounts  advanced  to
beneficiaries  under  Letters of Credit)  shall be in a  principal  amount of at
least $3,000,000 and in integral multiples of $100,000 in excess thereof, or the
remaining amount of the Revolving Commitment or the Tranche A Commitment, as the
case may be.

         (c)      Eurodollar Advances.

                  (i) Initial and Subsequent  Advances.  The Borrower shall give
the Administrative  Agent in the case of Eurodollar  Advances at least three (3)
Business  Days'  irrevocable  prior written  notice in the form of a Request for
Advance,  or telephonic  notice  followed  immediately by a Request for Advance;
provided,  however, that the Borrower's failure to confirm any telephonic notice
with a  Request  for  Advance  shall not  invalidate  any  notice so given.  The
Borrower  shall  promptly  notify  the  Administrative  Agent  by  telephone  or
telecopy,  and shall immediately  confirm any such telephonic notice in writing,
of its selection of a Eurodollar  Base Rate and  Eurodollar  Advance  Period for
such Advance; provided, however, that the Borrower's failure to confirm any such
telephonic notice in writing shall not invalidate any notice so given.

                  (ii) Repayments, Continuations and Conversions. At least three
(3)  Business  Days prior to each Payment  Date for a  Eurodollar  Advance,  the
Borrower  shall give the  Administrative  Agent written  notice in the form of a
Notice of  Conversion/Continuation  specifying  whether all or a portion of such
Eurodollar  Advance  outstanding  on such Payment Date (A) is to be continued in
whole or in part as a new  Eurodollar  Advance,  in which case such notice shall
also specify the Eurodollar Advance Period for such new Eurodollar Advance,  (B)
is to be converted in whole or in part to a Base Rate  Advance,  or (C) is to be
repaid and not continued or converted.  Upon such Payment Date,  such Eurodollar
Advance  will,  subject to the  provisions  hereof,  be so repaid,  continued or
converted, as applicable. If the Borrower fails to give the Administrative Agent
written  notice  specifying  whether  a  Eurodollar  Advance  is to  be  repaid,
continued or converted  on a Payment  Date,  such  Eurodollar  Advance  shall be
converted to a Base Rate Advance on such Payment Date.



                                       29

<PAGE>



                  (iii) Miscellaneous.  Notwithstanding any term or provision of
this Agreement which may be construed to the contrary,  each Eurodollar  Advance
shall be in a principal amount of at least $5,000,000 and in integral  multiples
of $100,000 in excess thereof,  and at no time shall the aggregate number of all
Eurodollar Advances outstanding exceed ten (10).

         (d) Fixed Rate Advances.  All Advances of Tranche C Loans shall be made
as Fixed Rate  Advances.  Under no  circumstances  may any Fixed Rate Advance be
converted to a Base Rate Advance or a Eurodollar Advance.

         (e) Notification of Lenders. Upon receipt of a Request for Advance or a
notice from the Borrower  with respect to any  outstanding  Advance prior to the
Payment  Date  for  such  Advance,   or  a  request  by  the  Issuing  Bank  for
reimbursement under Section 2.14 hereof, the Administrative Agent shall promptly
notify each Lender and each  Tranche C Lender,  as  applicable,  by telephone or
telecopy of the contents thereof and the amount of such Lender's or such Tranche
C Lender's  portion of the Advance.  Each Lender and each  Tranche C Lender,  as
applicable,  shall,  not later  than 1:00  p.m.  (New York  time) on the date of
borrowing specified in such notice,  make available to the Administrative  Agent
at the  Administrative  Agent's Office, or at such account as the Administrative
Agent shall designate, the amount of its portion of any Advance which represents
an additional borrowing hereunder in immediately available funds.

         (f)      Disbursement.

                  (i)  Prior  to 3:00  p.m.  (New  York  time) on the date of an
Advance hereunder,  the Administrative  Agent shall, subject to the satisfaction
of any applicable conditions set forth in Article 4 hereof, disburse the amounts
made  available  to it by the Lenders or the Tranche C Lenders,  as the case may
be, in  immediately  available  funds by (A)  transferring  the  amounts so made
available by wire transfer pursuant to the Borrower's  instructions,  (B) in the
case of an Advance representing the reimbursement of the Issuing Bank for a draw
under a Letter of Credit,  transferring  such amount to the Issuing Bank, or (C)
in the absence of such instructions  referred to in clause (A) above and so long
as the  provisions  of clause (B) above do not apply to the  requested  Advance,
crediting  the  amounts  so  made  available  to the  account  of  the  Borrower
maintained  with the  Administrative  Agent.  In the case of any  Advance of the
Tranche C Loans,  notwithstanding any contrary instruction by the Borrower,  the
Administrative  Agent shall  transfer a portion of such  Advance in an amount of
not less than the amount  necessary to pay  interest on such Advance  during the
Tranche C Pre-Fund Period to the Tranche C Pre-Funded Interest Account.

                  (ii)  Unless the  Administrative  Agent  shall  have  received
notice from a Lender, prior to the date of any Advance that such Lender will not
make available to the Administrative Agent such Lender's ratable portion of such
Advance,  the Administrative Agent may assume that such Lender, has made or will
make such  portion  available  to the  Administrative  Agent on the date of such
Advance and the Administrative Agent may, in its sole discretion and in reliance
upon  such   assumption,   make  available  to  the  Borrower  on  such  date  a
corresponding  amount.  If and to the extent a Lender does not make such ratable
portion available to the Administrative  Agent, such Lender,  agrees to repay to
the  Administrative  Agent on demand such  corresponding  amount  together  with
interest  thereon,  for each day from the date such amount is made  available to
the Borrower until the date such amount is repaid to the  Administrative  Agent,
at the Federal Funds Rate.

                  (iii) If such Lender shall repay to the  Administrative  Agent
such corresponding  amount, such amount so repaid shall constitute such Lender's
portion of the applicable Advance for purposes of this Agreement. If such Lender
does not repay such corresponding amount



                                       30
<PAGE>



immediately upon the Administrative  Agent's demand therefor, the Administrative
Agent shall  notify the  Borrower,  and the  Borrower  shall  promptly  pay such
corresponding  amount  to  the  Administrative  Agent,  together  with  interest
thereon.  The failure of any Lender to fund its portion of any Advance shall not
relieve any other  Lender of its  obligation  hereunder  to fund its  respective
portion of the  Advance on the date of such  borrowing,  but no Lender  shall be
responsible for any such failure of any other Lender.

                  (iv) In the event that,  at any time when the  Borrower is not
in Default,  a Lender for any reason  fails or refuses to fund its portion of an
Advance,  then,  until such time as such  Lender has funded its  portion of such
Advance,  or all  other  Lenders  have  received  payment  in full  (whether  by
repayment or  prepayment)  of the  principal and interest due in respect of such
Advance,  such non-funding Lender shall not have the right (A) to vote regarding
any issue on which voting is required or advisable  under this  Agreement or any
other Loan  Document  and,  with respect to any such  Lender,  the amount of the
Revolving  Commitment  and Term  Loans,  as  applicable,  or  Senior  Loans,  as
applicable, held by such Lender shall not be counted as outstanding for purposes
of determining  "Majority  Lenders"  hereunder,  and (B) to receive  payments of
principal, interest or fees from the Borrower in respect of its unfunded portion
of  Advances.  Notwithstanding  the  foregoing,  within  sixty  (60) days of the
failure by any Lender to fund its portion of an  Advance,  so long as no Default
or Event of Default then exists, the Borrower may, in its discretion,  provide a
replacement  lender or lenders for such non-funding  Lender,  which  replacement
lender or lenders will be subject to the approval of the Arrangers,  which shall
not be unreasonably  withheld, and the Administrative Agent, such Lender and the
Borrower  shall take all  necessary  actions to transfer the rights,  duties and
obligations of such  non-funding  Lender to such  replacement  lender or lenders
within such sixty (60) day period (including, without limitation, the payment in
full of all Senior  Obligations  hereunder due to the  non-funding  Lender being
replaced).

         (g) Automatic  Payment.  Unless payment is otherwise timely made by the
Borrower,  the  becoming  due of any  amount  required  to be  paid  under  this
Agreement or any of the other Loan  Documents as  principal,  accrued  interest,
fees or other charges in respect of the Senior Loans shall be deemed irrevocably
to be a Request  for  Advance  on the due date of,  and in an  aggregate  amount
required to pay, such principal,  accrued interest,  fees or other charges,  and
the proceeds of an Advance (i) under the Unfunded Tranche A Commitment,  or (ii)
in the event  that the  Tranche  A  Commitment  is fully  funded or is no longer
available,  under  the  Revolving  Commitment,  made  pursuant  thereto  may  be
dispersed  by way of direct  payment of the relevant  Obligation  and shall bear
interest  initially as a Base Rate  Advance.  The  Administrative  Agent and the
Lenders  shall  have no  obligation  to the  Borrower  to honor any such  deemed
Request for Advance,  but may do so in their sole  discretion and without regard
to the  existence  of, and without  being deemed to have waived,  any Default or
Event of Default.

         Section 2.3       Interest.

         (a) On Base Rate Advances.  Interest on each Base Rate Advance shall be
computed  on the basis of a year of 365/366  days for the actual  number of days
elapsed and shall be payable quarterly in arrears, commencing on the last day of
the first (1st) full fiscal quarter after the Agreement  Date.  Interest on Base
Rate Advances then outstanding  shall also be due and payable on the date of any
repayment  made  under  Section  2.2 or Section  2.6  hereof and on the  Initial
Maturity Date or the Tranche B Maturity  Date,  as  applicable.  Interest  shall
accrue and be payable on each Base Rate Advance at the simple per annum interest
rate  equal to the sum of (A) the Base  Rate and (B) the  Applicable  Margin  in
effect from time to time and as more fully set forth in Section 2.3(g) below.



                                       31

<PAGE>



         (b) On Eurodollar  Advances.  Interest on each Eurodollar Advance shall
be computed on the basis of a 360-day year for the actual number of days elapsed
and shall be payable  in arrears  (i) on the  applicable  Payment  Date for such
Advance,  and (ii) if the Eurodollar  Advance Period for such Eurodollar Advance
exceeds three (3) months,  interest on such Eurodollar  Advance shall be due and
payable in  arrears  on every  three (3) month  anniversary  of such  Eurodollar
Advance.  Interest on Eurodollar Advances then outstanding shall also be due and
payable on the date of any  repayment  made  under  Section  2.2 or Section  2.6
hereof and on the  Initial  Maturity  Date or the  Tranche B Maturity  Date,  as
applicable. Interest shall accrue and be payable on each Eurodollar Advance at a
rate per annum equal to the sum of (A) the  Eurodollar  Base Rate  applicable to
such  Eurodollar  Advance and (B) the  Applicable  Margin in effect from time to
time and as more fully set forth in Section 2.3(g) below.

         (c)      On Fixed Rate Advances.

                  (i) Interest on each Fixed Rate  Advance  shall be computed on
the basis of a 360-day  year for the actual  number of days elapsed and shall be
payable,  subject to the  restrictions  contained in this Section  2.3(c) and in
Section 2.15 hereof,  quarterly  in arrears,  commencing  on the last day of the
first (1st) full calendar  quarter after the Agreement  Date.  Interest on Fixed
Rate  Advances  then  outstanding  shall  also be due and  payable  on the Final
Maturity Date. Except as set forth in Section  2.3(e)(ii) below,  interest shall
accrue  and be  payable  on each  Fixed  Rate  Advance  at the  simple per annum
interest rate equal to ten percent (10%).

                  (ii) So long as  funds  remain  in the  Tranche  C  Pre-Funded
Interest Account,  the Borrower shall provide the Administrative Agent with five
(5) Business Days' written notice of the due date of any interest payment on the
Tranche C Loans,  which notice shall  direct the  Administrative  Agent to apply
funds from the Tranche C  Pre-Funded  Interest  Account to pay such  interest in
cash.  To the  extent  that  funds are  available  in the  Tranche C  Pre-Funded
Interest Account, the Administrative Agent shall comply with such direction.  In
no event shall any cash payment of interest on the Tranche C Loans be made other
than from funds available therefor in the Tranche C Pre-Funded  Interest Account
until all funds in such account shall have been depleted.

                  (iii)  Notwithstanding  anything  to  the  contrary  contained
herein,  the amount of any interest with respect to any Fixed Rate Advance which
is not paid in cash to the Administrative  Agent, for the benefit of the Tranche
C Lenders,  whether because (A) a Payment  Blockage  Period then exists,  or (B)
with  respect to any  quarterly  interest  payment,  the Borrower is not able to
demonstrate  pro forma  compliance  with the  Financial  Covenants  after giving
effect to such payment, shall be paid in kind to the extent set forth in Section
2.3(e)(ii), and capitalized as additional principal under the Tranche C Loans as
of the applicable  quarterly payment date therefor,  and, to the extent that the
amount  of such  interest  is paid in kind,  shall  not  constitute  a Tranche C
Default  hereunder.  The amount of all interest  required to be  capitalized  as
additional  principal  under the  Tranche  C Loans  hereunder  shall  constitute
Capitalized   Interest   and  shall   accrue   interest   from  and  after  such
capitalization   at  the  interest  rate  then   applicable  to  the  Tranche  C
Obligations.

         (d)  Interest  if No Notice  of  Selection  of  Interest  Rate.  If the
Borrower fails to give the  Administrative  Agent timely notice of the selection
of a Eurodollar  Base Rate, or if the  Administrative  Agent is unable to timely
determine a Eurodollar  Base Rate for any Advance,  the Base Rate shall apply to
such Advance.  If the Borrower fails to elect to continue any Eurodollar Advance
then outstanding prior to the Payment Date applicable thereto in accordance with
the


                                       32

<PAGE>



provisions  of Section  2.2 hereof,  the Base Rate shall  apply to such  Advance
commencing on and after such Payment Date.

         (e)  Interest  Upon  Default  and Upon  Failure  to Make Cash  Interest
Payments on Tranche C Loans When Due.

                  (i) On the Senior Obligations. Immediately upon the occurrence
of an Event of Default under Section 10.1(b), (f) or (g) hereunder,  interest on
the Senior  Obligations shall accrue at the Default Rate applicable thereto from
the date of such Event of Default.  Interest accruing at the Default Rate on the
Senior  Obligations  shall be payable on demand and in any event on the  Initial
Maturity Date or the Tranche B Maturity  Date, as  applicable,  and shall accrue
until the earliest to occur of (A) waiver of the applicable  Event of Default in
accordance with Section 13.12 hereof,  (B) agreement by the Majority  Lenders to
rescind the charging of interest at the Default  Rate, or (C) payment in full of
the Senior Obligations.  The Lenders shall not be required to (x) accelerate the
maturity of their Senior Loans, (y) terminate their Senior  Commitments,  or (z)
exercise any other rights or remedies available to them under the Loan Documents
in order to charge interest hereunder at the Default Rate.

                  (ii) On the Tranche C Obligations. During the existence of any
Tranche C Default under Section 10.3(a)(i),  (ii) or (iii), or in the event that
the amount of any  interest due in respect of the Tranche C  Obligations  is not
paid in cash to the  Administrative  Agent,  for the  benefit  of the  Tranche C
Lenders,  on the applicable  quarterly  payment date  therefor,  interest on the
Tranche C Obligations shall accrue at the Default Rate applicable to the Tranche
C Obligations during the quarterly period  immediately  preceding the applicable
quarterly payment date for which a cash payment is not made.

         (f) Computation of Interest.  In computing interest on any Advance, the
date of making the Advance  shall be included  and the date of payment  shall be
excluded; provided, however, that if an Advance is repaid on the date that it is
made, one (1) day's interest shall be due with respect to such Advance.

         (g)      Applicable Margins for Base Rate Advances and Eurodollar
Advances.

                  (i) Advances Under the Revolving  Commitment or of the Tranche
A Loans.  With respect to any Advance  under the  Revolving  Commitment,  or any
Advance of the Tranche A Loans, the Applicable  Margin shall be (A) on and after
the Agreement  Date to but not  including  the later of (I) the  Revolving  Loan
Availability  Date and (II) the  Adjustment  Date, (x) 3.00% with respect to any
Eurodollar Advance and (y) 1.50% with respect to any Base Rate Advance,  and (B)
on and after the later of (I) the Revolving Loan  Availability Date and (II) the
Adjustment  Date, the interest rate margin based upon the Leverage Ratio for the
most recent fiscal  quarter end,  effective as of the second (2nd)  Business Day
after the financial  statements  referred to in Section 7.2 hereof are delivered
by the  Borrower  to the  Administrative  Agent for the  fiscal  quarter  of the
Borrower  most  recently  ended,  expressed  as a per annum rate of  interest as
follows:

<TABLE>
<CAPTION>

                                           Then the Base Rate Advance     Then the Eurodollar Advance
      If the Leverage Ratio is:            Applicable Margin shall be:    Applicable Margin shall be:
<S>                                        <C>                            <C>
Greater than 6.00 to 1.00                         1.50%                      3.00%
Greater than 5.50 to 1.00 but less than or        1.25%                      2.75%
equal to 6.00 to 1.00
</TABLE>


                                       33

<PAGE>

<TABLE>
<CAPTION>
<S>                                        <C>                            <C>
Greater than 5.00 to 1.00 but less than or        1.00%                      2.50%
equal to 5.50 to 1.00
Greater than 4.50 to 1.00 but less than or        0.75%                      2.25%
equal to 5.00 to 1.00
Greater than 4.00 to 1.00 but less than or        0.25%                       1.75%
equal to 4.50 to 1.00
Less than or equal to 4.00 to 1.00                0.00%                      1.25%
</TABLE>


In the  event  that the  Borrower  fails to  timely  provide  (i) the  financial
statements  referred to above in accordance with the terms of Section 7.2 hereof
or (ii) the  Performance  Certificate  referred to in Section  7.4  hereof,  and
without  prejudice to any additional rights under Section 2.3(e) or Section 10.2
hereof,  no  downward  adjustment  of the  Applicable  Margin in effect  for the
preceding quarter shall occur until the actual delivery of such statements,  and
from such failure and until such delivery,  the  Applicable  Margin shall be (x)
3.00% with  respect to each  Eurodollar  Advance,  and (y) 1.50% with respect to
each Base Rate Advance.

                  (ii)  Advances  of the  Tranche B Loans.  With  respect to any
Advance of the Tranche B Loans, the Applicable Margin shall be the interest rate
margin based upon the  Leverage  Ratio for the most recent  fiscal  quarter end,
effective as of the second (2nd)  Business  Day after the  financial  statements
referred  to in  Section  7.2  hereof  are  delivered  by  the  Borrower  to the
Administrative Agent for the fiscal quarter of the Borrower most recently ended,
expressed as a per annum rate of interest as follows:
<TABLE>
<CAPTION>

                                       Then the Base Rate Advance     Then the Eurodollar Advance
      If the Leverage Ratio is:        Applicable Margin shall be:    Applicable Margin shall be:
      ------------------------         --------------------------     ----------------------------
<S>                                    <C>                            <C>
Greater than 5.00 to 1.00                         2.00%                      3.50%

Less than or equal to 5.00 to 1.00                1.75%                      3.25%

</TABLE>

In the  event  that the  Borrower  fails to  timely  provide  (i) the  financial
statements  referred to above in accordance with the terms of Section 7.2 hereof
or (ii) the  Performance  Certificate  referred to in Section  7.4  hereof,  and
without  prejudice to any additional rights under Section 2.3(e) or Section 10.2
hereof,  no  downward  adjustment  of the  Applicable  Margin in effect  for the
preceding quarter shall occur until the actual delivery of such statements,  and
from such failure and until such delivery,  the  Applicable  Margin shall be (x)
3.50% with  respect to each  Eurodollar  Advance,  and (y) 2.00% with respect to
each Base Rate Advance.

         Section 2.4       Fees.

         (a) Fees Payable Under the Fee Letter.  The Borrower agrees to pay such
fees as are mutually agreed upon and as are described in the Fee Letter.

         (b) Commitment  Fees. The Borrower agrees to pay to the  Administrative
Agent,  for  the  benefit  of each  of the  Lenders  in  accordance  with  their
respective  Revolving  Commitment  Ratios or  Tranche A  Commitment  Ratios,  as
applicable,  a commitment  fee on (i) the  aggregate  unborrowed  balance of the
Remaining Revolving  Commitment,  for each day from the Agreement Date until the
Initial  Maturity Date, at a rate of one-half of one percent  (0.50%) per annum,
and (ii) the Unfunded Tranche A Commitment, for each day from the Agreement Date
until  March  31,  2002,  at a rate of,  (A) so long as the  Unfunded  Tranche A
Commitment is greater than or equal to $225,000,000, one and one-quarter percent
(1.25%) per annum, (B) so long as the


                                       34

<PAGE>



Unfunded  Tranche A  Commitment  is less than  $225,000,000  but greater than or
equal to $150,000,000,  three-quarters of one percent (0.75%) per annum, and (C)
so long as the Unfunded Tranche A Commitment is less than $150,000,000, one-half
of one percent (0.50%) per annum.  Such commitment fees shall be computed on the
basis of a year of 365/366 days for the actual number of days elapsed,  shall be
payable  quarterly in arrears on the last Business Day of each calendar quarter,
commencing on the last day of the first full fiscal  quarter after the Agreement
Date, shall be fully earned when due, and shall be  non-refundable  when paid. A
final payment of any accrued and unpaid  commitment  fee with respect to (x) the
Revolving Commitment shall also be due and payable on the Initial Maturity Date,
and (y) the Unfunded Tranche A Commitment shall also be due and payable on March
31, 2002.

         (c)  Letter  of  Credit  Fee.  The  Borrower   agrees  to  pay  to  the
Administrative  Agent, for the benefit of the Lenders,  in accordance with their
respective  Revolving  Commitment  Ratios,  a letter of credit  fee equal to the
Applicable  Margin for Eurodollar  Advances  under the Revolving  Commitment per
annum  (computed  on the basis of a 360 day year for the  actual  number of days
elapsed),  of the stated  amount of each Letter of Credit  issued by the Issuing
Bank hereunder.  Such letter of credit fee shall be due and payable quarterly in
arrears on the last day of each  calendar  quarter  during  which such Letter of
Credit is  outstanding  and any accrued  and unpaid  letter of credit fees shall
also be due and payable on the Initial  Maturity Date. Such letter of credit fee
shall be fully earned when due and nonrefundable  when paid. In the event of any
inconsistency between the terms of this Agreement and the terms of any letter of
credit  reimbursement  agreements  or  indemnification  agreements  between  the
Borrower  and the  Issuing  Bank  with  respect  to  Letters  of  Credit  issued
hereunder, the terms of this Agreement shall control.

         (d) Issuing Bank Fee. The Borrower  agrees to pay to the Issuing  Bank,
for its own account,  a fee equal to one-quarter  of one percent  (0.25%) of the
face amount of each Letter of Credit  issued  hereunder,  which fee shall be due
and payable in advance on the date of the issuance of such Letter of Credit. The
foregoing fee shall be fully earned when due and nonrefundable when paid. In the
event of any inconsistency  between the terms of this Agreement and the terms of
any letter of credit  reimbursement  agreements  or  indemnification  agreements
between the  Borrower and the Issuing Bank with respect to the Letters of Credit
issued hereunder, the terms of this Agreement shall control.

         (e)  Computation  of Fees.  In computing  any fees  payable  under this
Section  2.4, the first day of the  applicable  period shall be included and the
date of payment shall be excluded.

         Section 2.5       Optional Prepayment/Reduction of Commitment.

         (a)  Prepayment  of  Advances.  The  principal  amount of any Base Rate
Advance under the Revolving Loan Commitment may be prepaid in full or in part at
any time, without penalty or premium,  upon not less than one (1) Business Days'
prior written notice to the  Administrative  Agent;  and the principal amount of
any Eurodollar  Advance under the Revolving Loan Commitment may be prepaid prior
to the applicable Payment Date,  without penalty or premium,  upon not less than
three (3)  Business  Days' prior  written  notice to the  Administrative  Agent,
provided that the Borrower  shall  reimburse the Lenders and the  Administrative
Agent, on demand, for any loss or out-of-pocket  expense incurred by any of them
in  connection  with such  prepayment  of  Eurodollar  Advances  as set forth in
Section  2.10  hereof.  Each  notice  of  prepayment  given  hereunder  shall be
irrevocable.  Upon receipt of any notice of prepayment, the Administrative Agent
shall  promptly  notify  each Lender of the  contents  thereof by  telephone  or
telecopy and of such Lender's portion of the prepayment.



                                       35

<PAGE>



         (b)      Permanent Prepayment or Reduction.

                  (i) Terms of  Prepayments or  Reductions.  Optional  permanent
prepayments  of principal of the Term Loans,  and  permanent  reductions  of the
Revolving Commitment hereunder,  may be made at any time upon three (3) Business
Days' prior  irrevocable  written notice to the  Administrative  Agent,  without
penalty or premium,  provided that such  prepayments  or reductions  shall be in
minimum  amounts of $5,000,000 and integral  multiples of $1,000,000;  provided,
however,  that if the Borrower  prepays the Tranche B Loans in full on or before
the second (2nd)  anniversary of the Agreement  Date, the Borrower hereby agrees
to pay to the Administrative  Agent, on behalf of the Lenders in accordance with
their respective  Tranche B Commitment Ratios, a premium in an amount determined
by  multiplying  the  aggregate  amount of the Tranche B  Commitment  by (i) one
percent  (1.00%)  with respect to such  prepayments  made on or before the first
(1st) anniversary of the Agreement Date, and (ii)  three-quarters of one percent
(0.75%) with respect to such prepayments made after the first (1st)  anniversary
of the  Agreement  Date but on or before the  second  (2nd)  anniversary  of the
Agreement  Date.  Optional  permanent  prepayments of principal of the Tranche C
Loans may be made, on a pro rata basis,  subject to the terms and  conditions of
Section 2.15 hereof and the  mandatory  repayments,  if any, of the Senior Loans
pursuant to Section 2.7(c) hereof, to the extent of any Net Proceeds received by
the  Borrower,  or received by Holdco and  Invested  in the  Borrower,  from the
issuance of any Permitted  High-Yield  Securities or the issuance of any Capital
Stock;  provided  that such  prepayments  are made within thirty (30) days after
receipt by the Borrower or Holdco, as the case may be, of such Net Proceeds.

                  (ii) Application of Payments or Reductions.  In the event that
the Borrower  shall make a  prepayment  of the Term Loans on or before March 31,
2002, the amount of such prepayment  shall be applied to permanently  reduce the
Tranche A Commitment and the Tranche B Loans on a pro rata basis. If applicable,
the  Borrower  shall pay to the  Administrative  Agent,  for the  benefit of the
Lenders, the amount to reduce the amount of the Tranche A Loans then outstanding
to not more than the amount of the Tranche A  Commitment  as so reduced.  In the
event that the Borrower  shall make a  prepayment  of the Term Loans after March
31, 2002, such prepayment of the Term Loans shall permanently reduce the Tranche
A Loans  and the  Tranche B Loans,  on a pro rata  basis.  Each  such  reduction
allocated  to the  Tranche  A Loans  shall  reduce,  on a pro  rata  basis,  the
remaining  scheduled  installments of principal due under the Tranche A Loans as
set forth in Section 2.6(b)  hereof.  Each such reduction of the Tranche B Loans
shall be allocated to the Tranche B Loans, on a pro rata basis, to the remaining
scheduled  installments  of principal due under the Tranche B Loans as set forth
in Section 2.6(c) hereof.  Each such prepayment shall also be made together with
accrued  interest on the amount so prepaid and the commitment  fees set forth in
Section  2.4(b)  accrued  through the date of the reduction  with respect to the
amount  reduced.  As of the date of  cancellation  or reduction set forth in any
notice thereof,  the Revolving  Commitment  shall be permanently  reduced to the
amounts  stated  in the  Borrower's  notice  for all  purposes  herein,  and the
Borrower shall pay to the Administrative  Agent, for the benefit of the Lenders,
the amount  necessary to reduce the principal amount of the Revolving Loans then
outstanding to not more than the amount of the Remaining Revolving Commitment as
so reduced,  together with the accrued interest on the amount so prepaid and the
commitment  fee set forth in  Section  2.4(b)  accrued  through  the date of the
reduction  with  respect  to the amount  reduced.  In  connection  with any such
permanent  repayment,  the Borrower shall reimburse the Administrative Agent and
the Lenders, on demand, for any loss or out-of-pocket expense incurred by any of
them in  connection  with such payment of Eurodollar  Advances,  as set forth in
Section  2.10.  Upon  receipt  of any notice of  prepayment  or  reduction,  the
Administrative  Agent shall promptly notify each Lender of the contents  thereof
by telephone or telecopy and of such Lender's  portion of the  prepayment or the
reduction, as applicable.

         Section 2.6       Repayment.

         (a) The Revolving  Loans.  All unpaid principal and accrued interest of
the Revolving Loans and any other  outstanding  Obligations  under the Revolving
Commitment shall be due and payable in full on the Initial Maturity Date.



                                       36

<PAGE>



         (b) The Tranche A Loans. Commencing on June 30, 2002, and at the end of
each calendar  quarter  thereafter,  the  outstanding  principal  balance of the
Tranche A Loan  then  outstanding  shall be  repaid  by an  amount  equal to the
percentage (for such quarter and year) set forth below:

<TABLE>
<CAPTION>

                                                                            Annual Percentage of Tranche A
                                       Percentage of Tranche A Loans       Loans Outstanding as of June 30,
                                      Outstanding as of June 30, 2002       2002 to be Reduced Each Period
          Quarters Ending               to be Reduced Each Quarter:               Ending December 31:
          ---------------               ---------------------------               -------------------
<S>                                   <C>                                  <C>
June 30, 2002 through and                          4.00%                                12.00%
including December 31, 2002
March 31, 2003 through and                         5.75%                                23.00%
including December 31, 2003
March 31, 2004 through and                         7.50%                                30.00%
including December 31, 2004
March 31, 2005 through and                         8.75%                                35.00%
including Initial Maturity Date

</TABLE>

Additionally,  the Tranche A Loans shall be repaid as may be required by Section
2.7 hereof.  Any unpaid  principal  and  interest of the Tranche A Loans and any
other  outstanding  Obligations  under the Tranche A Commitment shall be due and
payable in full on the Initial Maturity Date.

         (c) Tranche B Loans.  Commencing  on June 30,  2002,  and at the end of
each calendar  quarter  thereafter,  the  outstanding  principal  balance of the
Tranche B Loans then outstanding shall be repaid as set forth below:
<TABLE>
<CAPTION>


          Quarters Ending                 Quarterly Payment Amount               Annual Payment Amount
          ---------------                 ------------------------               ---------------------
<S>                                       <C>                                    <C>
June 30, 2002 through and                        $ 500,000                            $ 1,500,000
including December 31, 2002
March 31, 2003 through and                       $ 375,000                            $ 1,500,000
including December 31, 2003
March 31, 2004 through and                       $ 375,000                            $ 1,500,000
including December 31, 2004
March 31, 2005 through and                       $ 375,000                            $ 1,500,000
including December 31, 2005
March 31, 2006                                   $67,500,000                            ------
June 30, 2006                                    $76,500,000                            ------

</TABLE>

Additionally,  the Tranche B Loans shall be repaid as may be required by Section
2.7 hereof.  Any unpaid  principal  and  interest of the Tranche B Loans and any
other  outstanding  Senior  Obligations  shall be due and payable in full on the
Tranche B Maturity Date.

         (d) The Tranche C Loans.  All unpaid  principal and accrued interest of
the Tranche C Loans and any other outstanding Tranche C Obligations shall be due
and payable in full on the Final Maturity Date.


                                       37

<PAGE>



         (e) Letter of Credit Advances.  All Base Rate Advances made pursuant to
draws under the Letters of Credit (which shall, in any event,  not be made prior
to the Revolving  Loan  Availability  Date) shall be deemed to be Advances under
the Revolving  Commitment  and shall be due and payable on the Initial  Maturity
Date.

         Section  2.7  Mandatory  Repayments.  In  addition  to  the  repayments
provided for in Section 2.6 hereof,  the Borrower shall, if required pursuant to
this Section 2.7, prepay the Loans, without any obligation to pay any prepayment
premium otherwise due, as follows:

         (a) Excess Cash Flow. Commencing with respect to the fiscal year of the
Borrower  ended  December  31,  2002,  and  with  respect  to each  fiscal  year
thereafter  during the term of this  Agreement,  on or prior to the Excess  Cash
Flow  Recapture  Date with respect to each such fiscal year,  the Borrower shall
make a prepayment of the  outstanding  principal  amount of the Term Loans in an
amount equal to  seventy-five  percent (75%) of Excess Cash Flow for such fiscal
year;  provided,  however,  that,  in the event  that the  Borrower  shall  have
maintained  a  Leverage  Ratio  less  than or  equal to 4.00 to 1.00 for two (2)
consecutive fiscal quarters, the amount of the prepayment due under this Section
2.7(a) shall at all times thereafter be reduced to fifty percent (50%) of Excess
Cash Flow.  The amount of any prepayment  made by the Borrower  pursuant to this
Section  2.7(a)  shall be applied  to prepay  the  Senior  Loans as set forth in
Section 2.7(e) below.

         (b)  Disposition  of Assets.  (i) If,  after the  Agreement  Date,  the
Borrower or any of its Subsidiaries shall sell, transfer or otherwise dispose of
(including,  without  limitation,  by way of condemnation  or casualty),  in the
aggregate  during the term of this  Agreement,  any Assets with Net  Proceeds in
excess of $5,000,000 (other than (i) the sale of obsolete  equipment (other than
Towers) and inventory or the sale,  transfer or other disposition of Assets that
are  replaced  by  property of  substantially  equivalent  kind and value in the
ordinary  course  of  business,  and (ii) the  lease of space on  Towers  in the
ordinary  course of business),  one hundred  percent  (100%) of the Net Proceeds
received by the Borrower or such Subsidiary from such Sales Transaction shall be
applied,  on the date of receipt thereof by the Borrower or such Subsidiary,  to
prepay the Senior Loans as set forth in Section 2.7(e) below; provided, however,
that, at the Borrower's election, so long as no Default or Event of Default then
exists or would be caused thereby, such Net Proceeds may be used by the Borrower
or any  Subsidiary  to purchase or construct  one or more Towers,  the aggregate
Purchase  Price of which does not exceed such Net  Proceeds  (or the sum of such
Net Proceeds plus Advances otherwise available for Permitted  Acquisitions),  so
long as the Borrower or such Subsidiary shall have (A) entered into a definitive
contract  for  purchase or  construction  within six (6) months from the date of
such sale or other disposition,  and (B) concluded such purchase or construction
within twelve (12) months from the date of such sale or other disposition.

                  (ii) In the event the Borrower elects to exercise its right to
reinvest Net Proceeds under Section 2.7(b)(i),  the Borrower shall so notify the
Administrative  Agent not less than five (5) Business Days prior to the proposed
date of the closing of the sale or other  disposition and shall, upon its or any
Subsidiary's  receipt  of any Net  Proceeds  with  respect to such sale or other
disposition,  remit such Net Proceeds to the Administrative  Agent to reduce the
outstanding principal balance of the Revolving Loans (but not the Term Loans nor
the amount of the Revolving Loan  Commitment).  Any amount in excess of the then
outstanding  balance  of the  Revolving  Loans  shall  be  held in  trust  in an
interest-bearing  account with the Administrative  Agent or an Affiliate thereof
(the "Net Proceeds Trust") for the benefit of the Borrower, to be applied to the
ultimate  purchase of the Towers,  as hereinafter  provided.  The Borrower shall
consummate the Acquisition of the Towers not later than twelve (12) months after
the date of the  applicable  sale or other  disposition.  To the extent that the
Borrower shall not have consummated


                                       38

<PAGE>



any such  purchase as of twelve (12) months after the date of such sale or other
disposition (for whatever reason, including the occurrence of a Default or Event
of Default hereunder), or the cash Purchase Price of such purchase shall be less
than the Net Proceeds of the  applicable  sale or other  disposition,  any funds
held in the Net  Proceeds  Trust  relating  to such sale shall be applied in the
manner set forth in Section 2.7(e).

                  (iii) Amounts in any Net Proceeds  Trust shall also be subject
to a valid and perfected  first priority Lien in favor of the  Collateral  Agent
(for the benefit of the Senior Credit Parties to secure the Senior Obligations),
pursuant to a deposit pledge  agreement or other security  agreement in form and
substance reasonably satisfactory to the Collateral Agent.

         (c) Debt or Equity  Issuance.  If, after the Agreement Date, (i) 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"),  or (ii)  the
Borrower  or Holdco  shall  issue any Capital  Stock or other  equity  interests
(other than any  Convertible  Securities)  in the Borrower or Holdco (other than
from the issuance of (A) any Permitted  High-Yield  Securities  which are equity
securities  to the  extent  that  such Net  Proceeds  shall be used to repay the
Tranche C Loans as permitted by Section  2.5(b)(i)  hereof,  or (B) such Capital
Stock or other equity  interests to any Shareholder or Affiliate  thereof) (each
an "Equity Offering"), the Borrower shall prepay the Senior Loans as follows:

                  (i) In the event that the Leverage  Ratio on a pro forma basis
         after giving effect to any Debt Offering  shall be greater than 4.00 to
         1.00,  an amount up to one hundred  percent  (100%) of the Net Proceeds
         received by Holdco with respect to such Debt Offering shall be applied,
         on the date of receipt of the Net  Proceeds  of such Debt  Offering  by
         Holdco,  by the  Borrower  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.

                  (ii) In the event that the Leverage Ratio on a pro forma basis
         after giving effect to any Equity  Offering  shall be greater than 4.00
         to 1.00, an amount up to fifty percent (50%) of the excess,  if any, of
         (A) the  aggregate  amount of Net Proceeds  received by the Borrower or
         Holdco, as applicable,  in respect of Equity Offerings conducted during
         the term of this Agreement, over (B) $250,000,000, shall be applied, on
         the date of receipt  thereof,  to prepay the Senior Loans, as set forth
         in Section 2.7(e),  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
         Equity Offering.

         (d) Tranche A  Overadvances.  Prior to the Revolving Loan  Availability
Date,  in the event that the  Lenders  shall make any Tranche A Loans which give
rise to an  Overadvance,  or if there shall exist an Overadvance  for any reason
whatsoever,  the  Borrower  shall  make,  ON  DEMAND,  a payment  on the  Senior
Obligations  to be  applied  to the  Tranche A Loans in an  aggregate  principal
amount equal to such Overadvance.

         (e) Application of Payments.  Except as otherwise  permitted in Section
2.7(b) hereof, the amount of any prepayment required to be made pursuant to this
Section 2.7 shall be applied as follows:  (i) first,  to permanently  prepay the
outstanding  principal  amount of the Term Loans, on a pro rata basis,  with the
amount  allocated to the Tranche A Loans being applied to reduce,  on a pro-rata
basis, the remaining scheduled installments of principal due under the Tranche A
Loans as set forth in Section  2.6(b)  hereof,  and the amount  allocated to the
Tranche B Loans being  applied to reduce,  on a pro-rata  basis,  the  remaining
scheduled  installments  of principal due under the Tranche B Loans as set forth
in Section 2.6(c) hereof, and (ii) thereafter, to prepay



                                       39

<PAGE>



the outstanding  principal amount of the Revolving  Loans,  with a corresponding
permanent reduction in the amount of the Revolving Commitment; provided however,
that if an Event of Default has  occurred and is  continuing  at the time of any
prepayment  required to be made pursuant to this Section 2.7, the amount of such
prepayment  shall be applied to prepay the Term Loans and the Revolving Loans on
a pro-rata  basis.  Accrued  interest on the principal  amount of the Term Loans
being  prepaid,  and accrued  interest and fees on the  principal  amount of the
Revolving Commitment being reduced,  pursuant to this Section 2.7 to the date of
such prepayment shall be paid by the Borrower  concurrently  with such principal
prepayment.

         Section 2.8       Notes; Loan Accounts.

         (a) The  Loans  shall be  repayable  in  accordance  with the terms and
provisions set forth herein,  and shall be evidenced by the Notes. One Revolving
Note,  one Tranche A Note and one Tranche B Note shall be issued by the Borrower
to the order of each  Lender  in  accordance  with its  Commitment  Ratios  with
respect to such Senior Loans.  On the date on which any Advance of the Tranche C
Loans is  funded,  if  applicable,  one  Tranche  C Note  shall be issued by the
Borrower  to the  order  of each  Tranche  C  Lender  funding  such  Advance  in
accordance  with its Tranche C Credit  Ratio with  respect to the amount of such
Advance. Each Note shall be issued by the Borrower to the order of a Lender or a
Tranche C Lender,  as the case may be, and shall be duly  executed and delivered
by one or more Authorized Signatories of the Borrower.

         (b) Each Lender and each  Tranche C Lender may open and maintain on its
books in the name of the Borrower a loan  account with respect to such  Lender's
or such  Tranche C Lender's,  as  applicable,  portion of the Loans and interest
thereon.  Each Lender and each  Tranche C Lender which opens such a loan account
shall debit such loan  account for the  principal  amount of its portion of each
Advance made and accrued interest thereon and shall credit such loan account for
each payment on account of principal of or interest on its Loans. The records of
a Lender or a Tranche C Lender with respect to the loan account maintained by it
shall be prima  facie  evidence of the Loans of such Lender or Tranche C Lender,
as applicable,  and accrued interest  thereon,  but the failure of any Lender or
any Tranche C Lender to maintain such records or to make any such notations,  or
any  error or  mistake  in such  notations,  shall  not  affect  the  Borrower's
repayment obligations with respect to such Loans.

         (c) Each Tranche C Note, and any other agreement, note, bond, debenture
or other  instrument  from time to time  evidencing the Tranche C Obligations or
any part thereof shall contain a specific  statement  thereon to the effect that
the Indebtedness  evidenced thereby is subject to the provisions of Section 2.15
of this Agreement.

         Section 2.9       Manner of Payment.

         (a) Each payment  (including any prepayment) by the Borrower on account
of the principal of or interest on the Loans,  commitment fees, letter of credit
fees  and  any  other  amount  owed  to any of the  Credit  Parties  under  this
Agreement,  the Fee  Letter or the Notes  shall be made not later than 2:00 p.m.
(New York time) on the date  specified for payment  under this  Agreement to the
Administrative  Agent at the  Administrative  Agent's Office, for the account of
the applicable  Credit Party,  in Dollars in immediately  available  funds.  Any
payment  received by the  Administrative  Agent after 2:00 p.m.  (New York time)
shall, solely for the purpose of calculating interest, be deemed received on the
next Business Day. Receipt by the Administrative  Agent of any payment hereunder
at or prior to 2:00 p.m.  (New York time) on any Business Day shall be deemed to
constitute  receipt  on such  Business  Day.  In the case of a  payment  for the
account  of a Lender  or a  Tranche  C Lender,  the  Administrative  Agent  will
promptly  thereafter  distribute  the amount so  received  in like funds to such
Lender or Tranche C Lender, as applicable. If the


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<PAGE>



Administrative  Agent shall not have  received  any payment from the Borrower as
and when due, the  Administrative  Agent will promptly notify the Credit Parties
accordingly.

         (b) The Borrower agrees to pay principal,  interest, fees and all other
Obligations due hereunder,  under the Fee Letter,  under the Notes, or under the
other  Loan  Documents   without   set-off  or  counterclaim  or  any  deduction
whatsoever.

         (c) Prior to the  acceleration  of the Senior Loans under  Section 10.2
hereof,  and other than with respect to payments required to be made pursuant to
Section 2.7 hereof  (which shall be applied as set forth in Section 2.7 hereof),
if some but less than all  amounts  due from the  Borrower  are  received by the
Administrative  Agent, the Administrative Agent shall distribute such amounts in
the following order of priority on a pro-rata  basis:  (i) FIRST, to the payment
of any fees,  costs or expenses then due and payable to any of the Senior Credit
Parties hereunder or under any other Loan Document;  (ii) SECOND, to the payment
of  interest  then due and  payable on the Senior  Loans;  (iii)  THIRD,  to the
payment of principal then due and payable on the Term Loans; (iv) FOURTH, to the
payment of principal then due and payable on the Revolving  Loans; (v) FIFTH, to
the payment of all other  amounts  not  otherwise  referred  to in this  Section
2.9(c) then due and payable to the Senior Credit Parties  hereunder or under any
other Loan Document;  (vi) SIXTH, to the payment of any fees,  costs or expenses
then due and  payable to any of the  Tranche C Lenders;  (vii)  SEVENTH,  to the
payment of  interest  then due and  payable on the  Tranche C Loans;  and (viii)
EIGHTH,  to the payment of all other amounts not  otherwise  referred to in this
Section 2.9(c) then due and payable to the Tranche C Lenders hereunder and under
any other Loan Document.

         (d) Subject to any contrary  provisions in the definition of Eurodollar
Advance  Period,  if any payment  under this  Agreement or any of the other Loan
Documents is specified to be made on a day which is not a Business Day, it shall
be made on the next Business Day, and such  extension of time shall in such case
be included in computing  interest  and fees,  if any, in  connection  with such
payment.

         Section 2.10      Reimbursement.

         (a)  Whenever  any  Lender  shall   sustain  or  incur  any  losses  or
out-of-pocket  expenses in connection with (i) failure by the Borrower to borrow
any  Eurodollar  Advance after having given notice of its intention to borrow in
accordance with Section 2.2 hereof (whether by reason of the Borrower's election
not to  proceed or the  non-fulfillment  of any of the  conditions  set forth in
Article 4), (ii)  prepayment of any  Eurodollar  Advance in whole or in part for
any reason,  or (iii) failure by the Borrower to prepay any  Eurodollar  Advance
after giving notice of its intention to prepay such Advance, the Borrower agrees
to pay to such Lender,  upon demand,  an amount  sufficient to  compensate  such
Lender  for all such  losses and  reasonable  out-of-pocket  expenses  resulting
therefrom.  Such Lender's good faith  determination of the amount of such losses
or  out-of-pocket   expenses,  as  set  forth  in  writing  and  accompanied  by
calculations in reasonable detail  demonstrating the basis for its demand, which
shall be delivered to the Borrower by the Administrative Agent on behalf of such
Lender, shall be presumptively correct.

         (b) Expenses subject to reimbursement hereunder shall include,  without
limiting the generality of the foregoing, expenses incurred by any Lender or any
participant  of  such  Lender   permitted   hereunder  in  connection  with  the
re-employment  of funds prepaid,  repaid,  not borrowed or paid, as the case may
be, and the amount of the expenses subject to  reimbursement  hereunder shall be
the  excess,  if any,  of (i) the  interest  or other cost to such Lender of the
deposit or other source of funding used to make any such Eurodollar  Advance for
the remainder of its Eurodollar  Advance  Period,  over (ii) the interest earned
(or to be earned) by such Lender upon


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<PAGE>



the re-lending or other  re-deployment of the amount of such Eurodollar  Advance
for the remainder of its putative Eurodollar Advance Period.

         Section 2.11      Pro Rata Treatment.

         (a) Advances.  Each Advance of any of the Loans from the Lenders or the
Tranche C Lenders,  as applicable,  shall be made pro-rata on the basis of their
respective Commitment Ratios or Tranche C Credit Ratios, as applicable.

         (b) Payments  Prior to  Declaration  of an Event of Default.  Except as
provided in Section 2.2(f)(iv),  prior to the declaration of an Event of Default
by the Administrative  Agent on behalf of the Lenders under Section 10.2 hereof,
each payment and  prepayment of principal of the Senior Loans,  and each payment
of interest on the Senior  Loans,  shall be made to the Lenders  pro-rata on the
basis of their respective  Commitment Ratios, and each payment and prepayment of
principal of the Tranche C Loans,  and each payment of interest on the Tranche C
Loans,  shall be made to the  Tranche C Lenders  pro-rata  on the basis of their
respective  Tranche C Credit  Ratios.  If any Lender or  Tranche C Lender  shall
obtain any payment  (whether  involuntary,  through the exercise of any right of
set-off,  or  otherwise)  on  account  of the Loans  made by it in excess of its
ratable share of the Loans under its Commitment Ratio or Tranche C Credit Ratio,
as applicable,  with respect  thereto,  such Lender or Tranche C Lender,  as the
case may be,  shall  forthwith  purchase  from the other  Lenders  or  Tranche C
Lenders, as applicable, such participations in the applicable Loans made by them
as shall be  necessary  to cause such  purchasing  Lender or Tranche C Lender to
share the excess  payment  ratably  with each of the other  Lenders or Tranche C
Lenders, as applicable;  provided,  however,  that if all or any portion of such
excess payment is thereafter  recovered from such purchasing Lender or Tranche C
Lender, such purchase from each Lender or Tranche C Lender, as applicable, shall
be rescinded,  and each such Lender or Tranche C Lender,  as  applicable,  shall
repay to the purchasing Lender or Tranche C Lender, as applicable,  the purchase
price to the extent of such recovery. The Borrower agrees that any Lender or any
Tranche C Lender so purchasing a participation  from another Lender or Tranche C
Lender,  as  applicable,  pursuant to this  Section  2.11(b) may, to the fullest
extent permitted by law, exercise all its rights of payment (including the right
of set-off)  with  respect to such  participation  as fully as if such Lender or
Tranche C Lender, as applicable, were the direct creditor of the Borrower in the
amount of such  participation.  The provisions of this Section 2.11(b) set forth
the rights of the Lenders and the Tranche C Lenders with respect to payment, and
are not enforceable for the benefit of the Borrower.

         (c)  Payments  Subsequent  to  Declaration  of  an  Event  of  Default.
Subsequent to the declaration of an Event of Default by the Administrative Agent
on behalf of the Lenders  under  Section 10.2 hereof,  payments and  prepayments
made to any of the Credit  Parties,  or otherwise  received by any of the Credit
Parties, shall be distributed as provided in Section 10.4 hereof.

         Section 2.12  Capital  Adequacy.  If any Lender  shall have  reasonably
determined  that the adoption  (after the Agreement  Date) of any Applicable Law
regarding the capital adequacy of banks or bank holding companies, or any change
in  Applicable  Law after the  Agreement  Date or any change after the Agreement
Date  in the  interpretation  or  administration  thereof  by  any  governmental
authority,  central bank or comparable agency charged with the interpretation or
administration  thereof,  or compliance by such Lender with any directive issued
or adopted  after the date hereof  regarding  capital  adequacy  (whether or not
having the force of law) of any such  governmental  authority,  central  bank or
comparable  agency, in each case first promulgated after the Agreement Date, has
or would have the effect of reducing the rate of return on such Lender's capital
as a  consequence  of its  obligations  hereunder to a level below that which it
could have achieved but for such  adoption,  change or  compliance  (taking into
consideration such Lender's


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<PAGE>



policies  with respect to capital  adequacy  immediately  before such  adoption,
change or compliance and assuming that such Lender's  capital was fully utilized
prior to such adoption,  change or compliance) by an amount reasonably deemed by
such Lender to be material,  then such Lender shall promptly notify the Borrower
of such  adoption,  compliance,  or  change.  Within  sixty (60) days of written
notice by such Lender,  the Borrower  shall,  in its  discretion,  (i) provide a
replacement  lender or lenders  for such  Lender,  which  replacement  lender or
lenders will be subject to the approval of the Administrative  Agent,  which, so
long  as no  Default  or  Event  of  Default  shall  then  exist,  shall  not be
unreasonably  withheld,  and  the  Administrative  Agent,  such  Lender  and the
Borrower  shall take all  necessary  actions to transfer the rights,  duties and
obligations  of such Lender to such  replacement  lender or lenders  within such
sixty (60) day period (including, without limitation, the payment in full of all
Obligations  hereunder due to the Lender being  replaced),  or (ii)  thereafter,
from time to time upon demand by such  Lender,  promptly pay to such Lender such
additional  amounts as shall be sufficient  to  compensate  such Lender for such
reduced return,  together with interest on such amount from the fourth (4th) day
after the date of demand until payment in full thereof at the Base Rate plus the
Applicable  Margin  in  effect  for  Base  Rate  Advances  under  the  Revolving
Commitment;  provided, however, that notwithstanding the foregoing, the Borrower
shall have no obligation to provide any such  replacement  bank or make any such
payment  in the  event  that  the  first  such  demand  in  respect  of any such
regulatory change,  request or directive  regarding capital adequacy was sent by
such  Lender  more  than  ninety  (90)  days  after  it  became   aware  of  the
applicability of such regulatory change, request or directive to the Loans. Such
Lender will designate a different  lending office if such designation will avoid
the need for,  or reduce the amount of, such  compensation  and will not, in the
judgment of such Lender, be otherwise materially disadvantageous to such Lender.
A certificate  of such Lender setting forth the amount to be paid to such Lender
by the  Borrower  as a result of any event  referred  to in this  paragraph  and
supporting  calculations  in  reasonable  detail  shall  be  conclusive,  absent
manifest error.

         Section  2.13 Tax Forms.  On or prior to the  Agreement  Date and on or
prior to the first  Business Day of each calendar year  thereafter,  each Lender
and each Tranche C Lender which is  organized in a  jurisdiction  other than the
United  States shall provide each of the  Administrative  Agent and the Borrower
with either (a) two (2)  properly  executed  originals of Form 4224 or Form 1001
(or any successor  forms)  prescribed by the Internal  Revenue  Service or other
documents  satisfactory  to the Borrower  and the  Administrative  Agent,  and a
properly executed Internal Revenue Service Form W-8 or Form W-9, as the case may
be,  certifying  (i) as to such Lender's or Tranche C Lender's,  as the case may
be, status for purposes of determining  exemption from United States withholding
taxes  with  respect  to all  payments  to be made to such  Lender or  Tranche C
Lender,  as applicable,  hereunder and under the other Loan  Documents,  or (ii)
that all payments to be made to such Lender or Tranche C Lender, as the case may
be,  hereunder and under the other Loan Documents are subject to such taxes at a
rate reduced to zero by an applicable tax treaty, or (b) a certificate  executed
by such  Lender or Tranche C Lender,  as the case may be,  certifying  that such
Lender or Tranche C Lender, as applicable,  is not a "bank" and that such Lender
or  Tranche  C Lender,  as  applicable,  qualifies  for the  portfolio  interest
exemption  under  Section  881(c) of the  Code,  and two (2)  properly  executed
originals  of  Internal  Revenue  Service  Form  W-8  (or  any  successor  form)
prescribed  certifying  such  Lender's  or Tranche C  Lender's,  as  applicable,
entitlement to an exemption from United States  withholding  tax with respect to
payments of interest  to be made under this  Agreement  and under the other Loan
Documents. Each such Lender and each such Tranche C Lender agrees to provide the
Administrative  Agent and the Borrower with new forms prescribed by the Internal
Revenue Service upon the expiration or obsolescence of any previously  delivered
form, or after the occurrence of any event requiring a change in the most recent
forms delivered by it to the Administrative Agent and the Borrower.



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<PAGE>



         Section 2.14      Letters of Credit.

         (a) Letter of Credit  Committed  Amount.  (i)  Subject to the terms and
conditions  hereof,  the Issuing Bank, in reliance on the  agreements of the L/C
Participants set forth in Section 2.14(d)(i) hereof,  agrees to issue Letters of
Credit  denominated  in Dollars  for the  account of the  Borrower  prior to the
Initial  Maturity Date, in such form as may be approved from time to time by the
Issuing  Bank;  provided that the Issuing Bank shall have no obligation to issue
any Letter of Credit if, after giving effect to such issuance, (A) the aggregate
amount of the L/C  Obligations  would  exceed  the  Letter  of Credit  Committed
Amount, or (B) the sum of (I) the aggregate  principal amount of Revolving Loans
then  outstanding,  plus  (II) the  aggregate  amount  of L/C  Obligations  then
outstanding, would exceed the Revolving Commitment.

                  (ii) Each  Letter of Credit  shall (A) be either (x) a standby
letter of credit  issued to support  obligations  of the  Borrower or any of its
Subsidiaries,  contingent  or  otherwise,  to finance  the  working  capital and
business needs of the Borrower or any of its Subsidiaries in the ordinary course
of  business,  or (y) a  commercial  letter of credit  issued in  respect to the
purchase of goods or services by the Borrower or any of its  Subsidiaries in the
ordinary course of business, and (B) expire no later than the earlier of (x) the
date that is twelve (12) months after the date of its issuance and (y) the fifth
(5th) Business Day prior to the Initial Maturity Date.

                  (iii) Each  Letter of Credit  shall be subject to the  Uniform
Customs and, to the extent not inconsistent therewith,  the laws of the State of
New York or, in any case where the Issuing  Bank  issues such  Letters of Credit
from  an  office  located  outside  of  the  United  States,  the  laws  of  the
jurisdiction in which such office is located.

                  (iv) The Issuing  Bank shall not at any time be  obligated  to
issue any Letter of Credit  hereunder if such issuance  would  conflict with, or
cause the Issuing Bank or any L/C  Participant  to exceed any limits imposed by,
any Applicable Law.

         (b)  Procedure  for  Issuance of Letters of Credit.  The  Borrower  may
request that the Issuing Bank issue a Letter of Credit, at any time prior to the
fifth (5th)  Business Day prior to the Initial  Maturity  Date, by delivering to
the  Issuing  Bank at its address  for  notices  specified  herein a Request for
Issuance of Letter of Credit, completed to the satisfaction of the Issuing Bank,
and such other  certificates,  documents and other papers and information as the
Issuing Bank may request.  Upon receipt of any Request for Issuance of Letter of
Credit,  the  Issuing  Bank  will  process  the  Letter  of  Credit  Application
accompanying   such  Request  for   Issuance  of  Letter  of  Credit,   and  the
certificates,  documents  and other  papers and  information  delivered to it in
connection  therewith,  in accordance  with its customary  procedures  and shall
promptly issue the Letter of Credit requested thereby (but in no event shall the
Issuing  Bank be required to issue any Letter of Credit  earlier  than three (3)
Business  Days after its receipt of any Request for Issuance of Letter of Credit
therefor  and all such  other  certificates,  documents  and  other  papers  and
information  relating  thereto) by issuing the original of such Letter of Credit
to the beneficiary thereof or as otherwise may be agreed by the Issuing Bank and
the Borrower.  The Issuing Bank shall furnish a copy of such Letter of Credit to
the Borrower promptly following the issuance thereof.

         (c) Fees,  Commissions and Other Charges. (i) The Borrower shall pay to
the  Administrative  Agent,  for the  account  of the  Issuing  Bank and the L/C
Participants,  with  respect to each Letter of Credit  issued  hereunder,  a per
annum  letter of credit  fee,  as and to the extent set forth in Section  2.4(c)
hereof.  In addition,  the Borrower  shall pay to the Issuing Bank,  for its own
account,  an issuing fee, as set forth in Section 2.4(d) hereof, with respect to
each Letter of Credit issued hereunder.


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<PAGE>



                  (ii) In addition to the foregoing  fees and  commissions,  the
Borrower  shall pay or reimburse  the Issuing Bank for such normal and customary
costs and  expenses as are  incurred or charged by the Issuing  Bank in issuing,
effecting  payment  under,  amending or  otherwise  administering  any Letter of
Credit.

                  (iii) The Administrative  Agent shall,  promptly following its
receipt  thereof,  distribute to the Issuing Bank and the L/C  Participants  all
fees and commissions  received by the Administrative  Agent for their respective
accounts pursuant to this Section 2.14(c).

         (d) L/C  Participations.  (i) The Issuing  Bank  irrevocably  agrees to
grant and hereby grants to each L/C Participant  and, to induce the Issuing Bank
to issue Letters of Credit hereunder, each L/C Participant irrevocably agrees to
accept and purchase and hereby  accepts and purchases  from the Issuing Bank, on
the terms and conditions  hereinafter  stated,  for such L/C  Participant's  own
account and risk an undivided interest equal to such L/C Participant's Revolving
Commitment  Ratio from time to time in effect in the Issuing  Bank's  rights and
obligations  under each  Letter of Credit  issued  hereunder  and each Letter of
Credit  Application  and the  amount  of each  draft  paid by the  Issuing  Bank
thereunder. Each L/C Participant unconditionally and irrevocably agrees with the
Issuing  Bank that,  if a draft is paid under any Letter of Credit for which the
Issuing Bank is not  reimbursed in full by the Borrower in  accordance  with the
terms of this Agreement, such L/C Participant shall pay to the Issuing Bank upon
demand at the Issuing  Bank's  address for  notices  specified  herein an amount
equal to such L/C Participant's then Revolving Commitment Ratio of the amount of
such draft, or any part thereof,  which is not so reimbursed.  If such demand is
made prior to 12:00 noon (New York time) on a Business Day, such L/C Participant
shall make such  payment to the Issuing  Bank prior to the end of such  Business
Day and  otherwise  such L/C  Participant  shall  make such  payment on the next
succeeding Business Day.

                  (ii) If any amount  required to be paid by any L/C Participant
to  the  Issuing  Bank  pursuant  to  Section   2.14(d)(i)  in  respect  of  any
unreimbursed portion of any payment made by the Issuing Bank under any Letter of
Credit is paid to the Issuing Bank within three (3) Business Days after the date
such  payment is due,  such L/C  Participant  shall pay to the  Issuing  Bank on
demand an amount equal to the product of (i) such  amount,  times (ii) the daily
average  Federal  Funds  Rate,  as quoted by the  Issuing  Bank,  times  (iii) a
fraction the  numerator  of which is the number of days that elapse  during such
period and the  denominator  of which is 360. If any such amount  required to be
paid by any L/C Participant  pursuant to Section  2.12(d)(i) is not in fact made
available to the Issuing Bank by such L/C Participant  within three (3) Business
Days after the date such  payment is due,  the Issuing Bank shall be entitled to
recover from such L/C Participant,  on demand, such amount with interest thereon
calculated  from  such due date at the rate per  annum  applicable  to Base Rate
Advances  hereunder.  A  certificate  of the Issuing  Bank  submitted to any L/C
Participant  with respect to any amounts of owing under this subsection shall be
conclusive in the absence of manifest error.

                  (iii)  Whenever,  at any time after the Issuing  Bank has made
payment under any Letter of Credit and has received from any L/C Participant its
pro-rata  share of such  payment in  accordance  with  Section  2.14(d)(i),  the
Issuing  Bank  receives  any payment  related to such Letter of Credit  (whether
directly  from the  Borrower or  otherwise,  including  proceeds  of  Collateral
applied  thereto by the  Issuing  Bank),  or any  payment of interest on account
thereof,  the Issuing Bank will, if such payment is received prior to 12:00 noon
(New York  time) on a  Business  Day,  distribute  to such L/C  Participant  its
pro-rata  share  thereof prior to the end of such Business Day and otherwise the
Issuing Bank will distribute  such payment on the next succeeding  Business Day;
provided,  however,  that in the event  that any such  payment  received  by the
Issuing Bank


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<PAGE>



shall be required to be returned by the Issuing Bank, such L/C Participant shall
return to the Issuing Bank the portion  thereof  previously  distributed  by the
Issuing Bank to it.

         (e) Reimbursement  Obligation of the Borrower.  (i) The Borrower agrees
to reimburse the Issuing Bank,  (x) with respect to drafts  presented  under any
Letter  of  Credit  and  paid by the  Issuing  Bank  prior  the  Revolving  Loan
Availability  Date,  upon  demand,  and (y) on the same  Business Day on which a
draft is presented under any Letter of Credit and paid by the Issuing Bank on or
after the  Revolving  Loan  Availability  Date,  provided  that the Issuing Bank
provides  notice to the  Borrower  prior to 12:00  noon (New York  time) on such
Business Day, and otherwise the Borrower will  reimburse the Issuing Bank on the
next  succeeding  Business  Day.  The failure to provide  such notice  shall not
affect the  Borrower's  absolute and  unconditional  obligation to reimburse the
Issuing  Bank for any draft paid under any Letter of Credit.  The  Issuing  Bank
shall  provide  notice  to the  Borrower  on such  Business  Day as a  draft  is
presented and paid by the Issuing Bank  indicating  the amount of (A) such draft
so paid and (B) any taxes,  fees, charges or other costs or expenses incurred by
the Issuing Bank in  connection  with such  payment.  Each such payment shall be
made to the Issuing Bank at its address for notices  specified herein in Dollars
in immediately available funds. Notwithstanding anything contained herein to the
contrary,  the Issuing Bank shall not be required to provide the  Borrower  with
notice of its demand for  payment  in  respect of drafts  paid under  Letters of
Credit prior to the Revolving Loan  Availability  Date, and the Borrower  hereby
agrees to pay such amounts immediately upon the Issuing Bank's demand therefor.

                  (ii)  Interest  shall  be  payable  on  any  and  all  amounts
remaining  unpaid by the Borrower under this Section  2.14(e) from the date such
amounts  are drawn  until  payment in full at the rate which would be payable on
any outstanding Base Rate Advances of Revolving Loans.

                  (iii) Each drawing after the Revolving Loan  Availability Date
under any Letter of Credit shall  constitute a request,  with no further  action
required,  by the Borrower to the Administrative  Agent for a borrowing pursuant
to Section  2.2(b) in the amount of such drawing.  The funding date with respect
to such borrowing shall be the date of such drawing.

         (f) Obligations  Absolute.  (i) The Borrower's  obligations  under this
Section 2.14 shall be absolute and unconditional under any and all circumstances
and  irrespective  of any set-off,  counterclaim or defense to payment which the
Borrower may have or have had against the Issuing Bank,  any L/C  Participant or
any beneficiary of a Letter of Credit.

                  (ii) The  Borrower  also agrees with the Issuing  Bank and any
L/C Participant  that neither the Issuing Bank nor any L/C Participant  shall be
responsible  for, and the  Borrower's  reimbursement  obligations  under Section
2.14(e)(i)  shall not be affected  by, among other  things,  (A) the validity or
genuineness  of  documents  or of any  endorsements  thereon,  even  though such
documents  shall in fact prove to be invalid,  fraudulent or forged,  or (B) any
dispute  between  or among the  Borrower  and any  beneficiary  of any Letter of
Credit or any other party to which such Letter of Credit may be transferred,  or
(C) any claims  whatsoever of Borrower against any beneficiary of such Letter of
Credit or any such transferee.

                  (iii) Neither the Issuing Bank nor any L/C  Participant  shall
be  liable  for any  error,  omission,  interruption  or delay in  transmission,
dispatch  or  delivery  of  any  message  or  advice,  however  transmitted,  in
connection with any Letter of Credit,  except for errors or omissions  caused by
the Issuing Bank's gross negligence or willful misconduct.

                  (iv) The  Borrower  agrees that any action taken or omitted by
the Issuing Bank under or in connection with any Letter of Credit or the related
drafts or documents, if done in


                                       46

<PAGE>



absence of gross  negligence or willful  misconduct  and in accordance  with the
standards of care specified in the Uniform  Commercial  Code of the State of New
York,  shall be binding on the Borrower and shall not result in any liability of
the Issuing Bank or any L/C Participant to the Borrower.

         (g) Letter of Credit  Payments.  If any draft  shall be  presented  for
payment under any Letter of Credit,  the  responsibility  of the Issuing Bank to
the Borrower in  connection  with such draft  shall,  in addition to any payment
obligation  expressly  provided  for in such  Letter of  Credit,  be  limited to
determining  that the  documents  (including  each draft)  delivered  under such
Letter of Credit in connection with such presentment are in conformity with such
Letter of Credit.

         (h)  Application.  To the extent that any  provision of any Request for
Issuance of Letter of Credit or any Letter of Credit Application  related to any
Letter of Credit is  inconsistent  with the provisions of this Section 2.14, the
provisions of this Section 2.14 shall apply.

         (i) Change in Law. If any change after the Agreement Date in Applicable
Law, any change in the interpretation or administration  thereof,  or any change
after the Agreement Date in compliance  with  Applicable Law by the Issuing Bank
or any other Lender as a result of any request or directive of any  governmental
authority, central bank or comparable agency (whether or not having the force of
law) shall (i) impose, modify or deem applicable any reserve (including, without
limitation,  any  imposed  by the  Board of  Governors  of the  Federal  Reserve
System), special deposit, capital adequacy,  assessment or other requirements or
conditions  against  letters  of credit  issued by the  Issuing  Bank or against
participations by any L/C Participant in the Letters of Credit or (ii) impose on
the Issuing Bank or any L/C Participant any other condition regarding any Letter
of Credit or any participation  therein,  and the result of any of the foregoing
in the reasonable determination of the Issuing Bank or such L/C Participant,  as
the  case  may be,  is to  increase  the  cost to the  Issuing  Bank or such L/C
Participant  of issuing or  maintaining  any Letter of Credit or  purchasing  or
maintaining any participation  therein,  as the case may be, by an amount (which
amount shall be  reasonably  determined)  deemed by the Issuing Bank or such L/C
Participant to be material,  then, on the earlier of (x) five (5) days following
the date of demand  (which  demand shall be made not later than three (3) months
following the Issuing Bank's or such L/C  Participant's  determination of a need
for additional  compensation) by the Issuing Bank or such L/C Participant or (y)
the Initial  Maturity Date, the Borrower shall  immediately pay the Issuing Bank
or such L/C Participant,  as the case may be, such additional  amount or amounts
as the Issuing Bank or such L/C Participant, as the case may be, determines will
compensate it for such increased  costs.  Within sixty (60) days of such written
demand by the Issuing Bank or such L/C  Participant,  the  Borrower  may, in its
discretion, provide a replacement lender or lenders for the Issuing Bank or such
L/C  Participant,  which  replacement  lender or lenders  will be subject to the
approval of the Administrative  Agent,  which, so long as no Default or Event of
Default  shall  then  exist,  shall  not  be  unreasonably   withheld,  and  the
Administrative  Agent,  such Lender and the  Borrower  shall take all  necessary
actions to transfer the rights,  duties and  obligations  of the Issuing Bank or
such L/C  Participant  to such  replacement  lender or lenders within such sixty
(60) day period.  A certificate of such Lender or the Issuing Bank setting forth
the amount, and in reasonable detail, the basis for the Issuing Bank or such L/C
Participant's  determination  of such amount,  to be paid to the Issuing Bank or
such L/C  Participant  by the  Borrower as a result of any event  referred to in
this paragraph  shall,  absent manifest error, be conclusive.  Such  certificate
shall be  delivered  to the  Borrower  with  each  written  demand  for  payment
referenced  above. The Issuing Bank and each L/C Participant  further agree that
they shall use their best  efforts to give the  Borrower  thirty (30) days prior
notice,  and in any event shall give prompt notice,  of any event referred to in
this  paragraph  which may have the effect of materially  increasing the cost to
the Issuing Bank or such L/C Participant


                                       47

<PAGE>



of issuing or maintaining any Letter of Credit or purchasing or maintaining any
participation therein.

         (j)  Indemnity.  The  Borrower  will  indemnify  and hold  harmless the
Indemnified   Parties  from  and  against  any  and  all  claims,   liabilities,
obligations,  losses,  damages,  penalties,  actions,  judgments,  suits, costs,
expenses or disbursements of any kind or nature whatsoever  (including,  without
limitation,  reasonable attorneys' fees) which may be imposed on, incurred by or
asserted against any such Indemnified  Parties in any way relating to or arising
out of the issuance of a Letter of Credit, except that the Borrower shall not be
liable  to any of the  Indemnified  Parties  for any  portion  of  such  claims,
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements  resulting from the gross negligence or willful
misconduct of the Indemnified  Parties as determined by a final,  non-appealable
judicial  order.  This  Section  2.14(j)  shall  survive   termination  of  this
Agreement.

         Section  2.15  Special  Provisions  Regarding  Tranche  C  Obligations.
Notwithstanding  anything to the contrary  contained in this Agreement or in any
other Loan  Document,  the  following  shall apply with respect to the Tranche C
Obligations on and after the date of the initial funding of the Tranche C Loans:

         (a) Priority of Liens.  The  Borrower and the Tranche C Lenders  hereby
agree that the Tranche C Obligations  shall be secured only by a first  priority
Lien on the Tranche C Pre-Funded  Interest Account and a subordinate Lien on the
Nextel Collateral, and shall not be secured by any of the other Collateral. Each
of the Tranche C Lenders agrees that, if at any time such Tranche C Lender shall
be in  possession  of any Assets  (other  than any funds  held in the  Tranche C
Pre-Funded  Interest  Account) of Holdco,  the Borrower or any of the Borrower's
Subsidiaries,  such  Tranche C Lender  shall  hold such  Assets in trust for the
Collateral  Agent, for the benefit of the Senior Credit Parties,  so long as any
of the Senior  Obligations  remains unpaid and until all Senior  Commitments are
terminated.   Notwithstanding  anything  to  the  contrary  (including,  without
limitation,  the date, time,  manner or order of perfection or attachment of the
Lien in the Nextel Collateral granted by the Borrower to the Collateral Agent on
behalf of the Tranche C Lenders),  and  notwithstanding the usual application of
the  priority  provisions  of the  Uniform  Commercial  Code as in effect in any
jurisdiction  or  any  other   Applicable  Law  or  judicial   decision  of  any
jurisdiction, or whether any of the Tranche C Lenders holds possession of all or
any part of the Nextel Collateral,  or any of the Tranche C Lenders is perfected
without filing or possession of any part of the Nextel  Collateral,  the Lien in
favor of the Collateral  Agent on behalf of the Senior Credit Parties shall be a
first,  senior and prior security interest in and Lien on the Nextel Collateral,
prior in interest and superior to the Lien on the Nextel  Collateral in favor of
the Collateral Agent on behalf of the Tranche C Lenders.

         (b)      Relative Priority of Tranche C Obligations.

                  (i) Each of the Tranche C Lenders hereby  subordinates any and
all claims now or  hereafter  owing to it by Holdco,  the  Borrower,  any of the
Borrower's  Subsidiaries  or any  other  obligor  in  respect  of the  Tranche C
Obligations (other than any claim to the Tranche C Pre-Funded  Interest Account)
to any and all claims of the  Senior  Credit  Parties,  in respect of the Senior
Obligations,  and to  payment  of or for  adequate  protection  pursuant  to any
Insolvency  Proceeding,  and,  except as set forth in Section  2.15(b)(iii)  and
Section 2.15(c) hereof, agrees that all Senior Obligations shall be paid in full
in cash or otherwise satisfied to the satisfaction of the Senior Credit Parties,
and the Senior  Commitments shall be terminated,  before any payment (other than
any  payment  (x) from the Tranche C  Pre-Funded  Interest  Account or (y) which
constitutes  Capitalized  Interest)  may be made on the  Tranche C  Obligations,
whether for principal or interest or other Indebtedness or obligations  relating
thereto.


                                       48

<PAGE>



                  (ii) Until all of the Senior  Obligations shall have been paid
in full in cash or otherwise  satisfied to the satisfaction of the Senior Credit
Parties,  and the Senior  Commitments shall have been terminated,  except as set
forth in  Sections  2.5(b)(i)  or  2.15(b)(iii)  hereof,  each of the  Tranche C
Lenders agrees not to accept any payment of any kind (whether in cash,  property
or securities except in the form of Capitalized  Interest) upon or in respect of
the  Tranche C  Obligations  (from the  Borrower or  otherwise),  nor (except as
permitted by Section  13.5 hereof) make any transfer to third  parties not party
to this Agreement,  nor take any other action designed to secure indirectly from
the  Borrower any payment on account of the Tranche C  Obligations,  without the
express,  prior written consent of the Administrative Agent. Each of the Tranche
C  Lenders  agrees  to pay over to the  Administrative  Agent any funds or other
distributions  that may be received by it from the  Borrower (A) as a prepayment
at any time (other than as permitted under Sections  2.5(b)(i) or 2.15(b)(iii)),
or (B) except as set forth in Sections  2.5(b)(i) or 2.15(b)(iii),  as a payment
on  account  of  the  Tranche  C  Obligations,  at any  time  until  the  Senior
Obligations  have  been  paid in full in  cash  or  otherwise  satisfied  to the
satisfaction of the Senior Credit Parties and the Senior  Commitments  have been
terminated.  In case any funds or other distributions shall be paid or delivered
to any Tranche C Lender under the  circumstances  described in clause (A) or (B)
of the preceding  sentence before the Senior Obligations shall have been paid in
full in cash or otherwise  satisfied to the  satisfaction  of the Senior  Credit
Parties and the Senior  Commitments  have been  terminated,  such funds or other
distributions  shall be held in trust by such  Tranche C Lender  for the  Senior
Credit Parties and immediately  paid and delivered to the  Administrative  Agent
(in the form received endorsed over to the  Administrative  Agent).  Each of the
Tranche C Lenders  further agrees not to sell,  assign,  transfer or endorse any
claim or claims  against the Borrower to anyone except  subject to the terms and
conditions of this Agreement.

                  (iii)   Notwithstanding   anything  contained  herein  to  the
contrary,  so long as (x) no Payment  Blockage  Period is in  effect,  (y) after
giving effect to the  applicable  payment,  no Default or Event of Default under
this  Agreement  would  be  caused  thereby,  and  (z) the  Borrower  is able to
demonstrate  pro forma  compliance  with the  Financial  Covenants  after giving
effect to any such  payment,  the  Borrower  or any  guarantor  of the Tranche C
Obligations  may make,  and the  Tranche C Lenders  may  receive  (A)  regularly
scheduled  cash  payments  of  interest  on or with  respect  to the  Tranche  C
Obligations  in accordance  with this  Agreement and the Tranche C Notes and (B)
optional  prepayments  of principal on the Tranche C Loans  permitted to be made
pursuant to Section 2.5(b)(i)  hereof;  provided that the Borrower may make cash
payments of interest on the Tranche C Loans (and  payment of  principal  of, and
interest on, the Tranche C Loans upon the Final Maturity Date or in the event of
acceleration  of the Tranche C Obligations  pursuant to Section  10.3(b) hereof)
from the  Tranche C  Pre-Funded  Interest  Account  despite the  existence  of a
Payment Blockage Period.  In any event,  cash interest payments on the Tranche C
Loans shall be made first from the Tranche C Pre-Funded  Interest  Account until
such  account  is  reduced to zero  before  cash  payment is made from any other
source.  As used herein,  "Payment Blockage Period" means each period commencing
on the date the Tranche C Representative and the Borrower receive written notice
(a  "Payment   Blockage   Notice")   from  the   Administrative   Agent  or  its
representative that a Default or Event of Default has occurred and is continuing
and ending on the earliest to occur of the following  events (a "Blockage Ending
Event"):

                  (A)      the Tranche C Representative and the Borrower receive
                           written  notice  from the  Administrative  Agent that
                           such  Default  or Event  of  Default  has been  cured
                           within  the grace  period,  if any,  provided  for in
                           Section  10.1 of this  Agreement or waived in writing
                           or has ceased to exist;

                  (B)      with  respect  to any  Default  or Event  of  Default
                           (other than any Default or Event of Default under any
                           of Section 10.1(b), (f) or (g) hereof), a three


                                       49

<PAGE>



                           hundred sixty-five (365) day period commencing on the
                           date of such  Payment  Blockage  Notice has  elapsed,
                           unless  at  the  expiration  of  such  three  hundred
                           sixty-five  (365) day period any judicial  proceeding
                           shall  be  pending   which  stays  or  prevents   the
                           acceleration   of  the  Senior   Obligations  or  the
                           exercise of the  Administrative  Agent's  remedies in
                           connection  therewith,  in  which  event  such  three
                           hundred sixty-five (365) day period shall be extended
                           during the period that such  judicial  proceeding  is
                           pending and such stay or prevention exists;

                  (C)      the Senior Obligations have been paid in full in cash
                           or  otherwise  satisfied to the  satisfaction  of the
                           Senior Credit Parties and the Senior Commitments have
                           been terminated; or

                  (D)      the benefits of this Section  2.15(b)(iii)  have been
                           waived in writing by the Administrative Agent and the
                           Majority Lenders.

In the case of Events of  Default  under any of  Sections  10.1(b),  (f) and (g)
hereof,  the Payment  Blockage  Period  shall  continue  until all of the Senior
Obligations  have  been  paid in full in  cash  or  otherwise  satisfied  to the
satisfaction of the Senior Credit Parties and the Senior  Commitments  have been
terminated.  After a Blockage Ending Event, the Borrower shall continue to make,
and the  Tranche  C Lenders  may  receive,  regularly  scheduled  cash  interest
payments on the Tranche C Obligations to the extent  permitted herein so long as
the other  requirements  of this  Agreement are satisfied.  Notwithstanding  any
provision in this Agreement to the contrary,  the Tranche C Lenders shall at all
times have the right to receive  payments  due to the Tranche C Lenders from the
Tranche C Pre-Funded Interest Account.

         (c) Each of the  Tranche  C Lenders  agrees  that the  priority  of the
Obligations set forth above shall continue during any insolvency,  receivership,
bankruptcy,  dissolution,  liquidation,  or reorganization proceeding, or in any
other proceeding,  whether voluntary or involuntary,  by or against Holdco,  the
Borrower  or  any  of the  Borrower's  Subsidiaries,  under  any  bankruptcy  or
insolvency  law or laws,  federal or state  relating to the relief of debtors of
any  jurisdiction,  whether now or hereafter in effect,  and in any out-of-court
composition,   assignment  for  the  benefit  of  creditors,   readjustment   of
Indebtedness,  reorganization,  extension or other debt  arrangement of any kind
(collectively,  an  "Insolvency  Proceeding").  In the  event  of  any  payment,
distribution,  division  or  application,  partial  or  complete,  voluntary  or
involuntary,  by  operation  of law or  otherwise,  of  all or any  part  of the
property,  assets or business of Holdco, the Borrower,  or any of the Borrower's
Subsidiaries or the proceeds thereof, or any securities of the Borrower,  to any
Tranche C Lender, by reason of any liquidation,  dissolution or other winding up
of  the  Borrower  or its  business  or by  reason  of any  sale  or  Insolvency
Proceeding,  then any such  payment or  distribution  of any kind or  character,
whether  in cash,  property  or  securities,  which,  but for the  subordination
provisions of this Section 2.15,  would otherwise be payable or deliverable upon
or in  respect  of the  Tranche C  Obligations,  shall  instead  be paid over or
delivered directly to the  Administrative  Agent, for application to the payment
of the Senior  Obligations as set forth in this Agreement,  and no holder of the
Tranche C  Obligations  shall  receive any such payment or  distribution  or any
benefit  therefrom to such extent until the Senior  Obligations  have been fully
paid in cash or otherwise  satisfied to the  satisfaction  of the Senior  Credit
Parties  and the  Senior  Commitments  have been  terminated  after  which  such
payments  or  distributions   may  be  applied  to  payment  of  the  Tranche  C
Obligations.

         (d)  Forbearance  from Exercise of Certain  Remedies.  Until the Senior
Obligations  have  been  paid in full in  cash  or  otherwise  satisfied  to the
satisfaction  of the  Credit  Parties  and  the  Senior  Commitments  have  been
terminated, none of the Tranche C Lenders, and no Person


                                       50

<PAGE>



on behalf of any of the Tranche C Lenders, shall (i) take any action or exercise
any remedy  against the Borrower to enforce the Tranche C  Obligations,  or (ii)
take any action or  exercise  any remedy  against  any  guarantor  of or pledgor
securing  the  Senior  Obligations  in order to  collect  any of the  Tranche  C
Obligations,  or (iii) commence,  or join with any other creditor of Holdco, the
Borrower or any of the Borrower's  Subsidiaries  in  commencing,  any Insolvency
Proceeding  against  any of  Holdco,  the  Borrower,  or  any of the  Borrower's
Subsidiaries or (iv) take any action or exercise any remedy against any property
or assets of the Borrower or of any guarantor of or pledgor  securing the Senior
Obligations;  provided,  however,  that (A) the Tranche C  Obligations  shall be
immediately  due and payable upon the  occurrence  of a Tranche C Default of the
type  described in Section  10.3(a)(ii)  or (iii) hereof and the  Administrative
Agent,  at the direction of the Tranche C Lenders,  may seek to collect  payment
(other than by  commencement  of any Insolvency  Proceeding or by foreclosure or
other  remedial  action  against any  property  or assets  (except the Tranche C
Pre-Funded  Interest  Account) of Holdco,  the Borrower or any of the Borrower's
Subsidiaries)  of the Tranche C Obligations in accordance  with this  Agreement,
and (B) if no Payment Blockage Period shall then exist,  during the existence of
any Tranche C Default, the Administrative Agent, at the direction of the Tranche
C Lenders,  may seek to  collect  payment  (other  than by  commencement  of any
Insolvency  Proceeding or by foreclosure  or other  remedial  action against any
properties  or assets  (except the  Tranche C  Pre-Funded  Interest  Account) of
Holdco,  the Borrower or any of the  Borrower's  Subsidiaries)  of the Tranche C
Obligations in accordance with this Agreement;  and provided,  further, that any
payments received by any of the Tranche C Lenders shall be received in trust for
the benefit of the Senior  Credit  Parties  pursuant to Section  2.15(c)  hereof
(other than any funds received from the Tranche C Pre-Funded Interest Account or
otherwise  received in compliance with this Section 2.15). Each of the Tranche C
Lenders  understands  and agrees that the Senior  Credit  Parties shall have the
right,  but shall have no  obligation,  to cure any default  under the Tranche C
Obligations without the prior written consent of the Required Tranche C Lenders,
and that, with respect to any Tranche C Default of the type described in Section
10.3(a)(iv), in the event that the Senior Credit Parties waive any corresponding
Default or Event of Default with respect to the Senior Obligations,  the Tranche
C Lenders shall be deemed to have waived, without any action on their part, such
Tranche C  Default  to the same  extent  waived by the  Senior  Credit  Parties.
Notwithstanding  anything  to  the  contrary  which  may  be  contained  in  the
foregoing,  the  restrictions  on the  Tranche C  Obligations  set forth in this
Section  2.15(d) shall not apply with respect to the Borrower at any time during
which the Borrower is a debtor in an Insolvency  Proceeding or in the event that
the Administrative  Agent, at the direction of the Majority Lenders,  shall have
declared the Senior Obligations to be due and payable prior to the Maturity Date
in accordance with Section 10.2 hereof; provided, however, that, in no event may
the  Tranche C Lenders  take any  action or  exercise  any  remedy  against  any
property  or assets  (other than the Tranche C  Pre-Funded  Interest  Account in
compliance  with  this  Section  2.15) of  Holdco,  the  Borrower  or any of the
Borrower's Subsidiaries, or commence, or join with any other creditor of Holdco,
the Borrower or any of the Borrower's Subsidiaries in commencing, any Insolvency
Proceeding,  until  the  Senior  Obligations  have  been  fully  paid in cash or
otherwise  satisfied to the  satisfaction  of the Senior Credit  Parties and the
Senior  Commitments  have  been  terminated.  Notwithstanding  anything  to  the
contrary contained herein, (x) the Tranche C Lenders may seek to collect payment
of the Tranche C  Obligations  by  participation  in any  Insolvency  Proceeding
commenced  against  the  Borrower  or Tower Sub,  and (y) each of the  Tranche C
Lenders  shall have the right to take all  actions  and pursue all  remedies  to
enforce its right to receive  payments  from the Tranche C  Pre-Funded  Interest
Account;  provided,  however, that, in either case, until the Senior Obligations
have been paid in full in cash or otherwise satisfied to the satisfaction of the
Senior Credit Parties and the Senior  Commitments  have been  terminated,  in no
event  may  the  Tranche  C  Lenders  commence,  or join  any  other  Person  in
commencing, an Insolvency Proceeding against the Borrower or Tower Sub.



                                       51

<PAGE>



         (e) Administrative  Agent's Authority to Act. For so long as any of the
Senior Obligations shall remain unpaid, the Administrative  Agent shall have the
right to act as  attorney-in-fact  for each of the  Tranche C  Lenders  (and any
other holder of any of the Tranche C  Obligations)  for the  purposes  specified
herein  and each of the  Tranche  C  Lenders  hereby  irrevocably  appoints  the
Administrative  Agent  its  true  and  lawful  attorney,   with  full  power  of
substitution,  in the  name of such  Tranche  C  Lender  (or in the  name of the
holders of the Tranche C Obligations), for the use and benefit of holders of the
Tranche C Obligations  without notice to the Tranche C Representative  or any of
the Tranche C Lenders (or the other holders of the Tranche C Obligations) or any
of their  respective  representatives,  successors  or  assigns,  to perform the
following acts, at the option of the holders of the Senior  Obligations,  at any
meeting of  creditors  of the  Borrower  or in  connection  with any  Insolvency
Proceeding:

                  (i) if a  proper  claim or  proof  of debt in  respect  of the
         Tranche C  Obligations  has not been filed in the form  required in any
         such Insolvency Proceeding at least ten (10) Business Days prior to the
         expiration of the time for filing such claims,  to file an  appropriate
         claim for and on behalf of the holders of the Tranche C Obligations;

                  (ii)  to  collect  any  assets  of the  Borrower  distributed,
         divided or applied by way of  dividend or  payment,  or any  securities
         issued,  on account of the Tranche C Obligations and to apply the same,
         or  the   proceeds   of  any   realization   upon  the  same  that  the
         Administrative  Agent in its sole discretion  elects to effect,  to the
         Senior  Obligations  until all of such Senior  Obligations  (including,
         without limitation, all interest and other payments accruing or paid on
         the  Senior  Obligations  after  the  commencement  of  any  Insolvency
         Proceeding at the rate specified in this  Agreement)  have been paid in
         full in cash or otherwise  satisfied to the  satisfaction of the Senior
         Credit  Parties,  rendering any surplus to the holders of the Tranche C
         Obligations, if and to the extent permitted by Applicable Law; and

                  (iii) in the event of an  Insolvency  Proceeding  in which any
         claim of the Tranche C Lenders  has been  assigned to the same class of
         claims as the Senior Credit  Parties,  to take  generally any action in
         connection with any such Insolvency  Proceeding  either in its own name
         or in the name of the Tranche C Lenders (including, without limitation,
         voting on any plan of reorganization) that the holders of the Tranche C
         Obligations  would be authorized to take, but for this Section 2.15, in
         the  event  that the  Administrative  Agent  believes  such  action  is
         reasonably necessary to protect the Senior Credit Parties' interests in
         the Senior  Obligations  and under this  Section  2.15 and after  first
         giving the Tranche C  Representative  five (5) days' written  notice of
         its  intent  to  take  such  action  (to  the  extent  such  notice  is
         practicable),  provided that the Administrative  Agent agrees to permit
         the Tranche C Lenders to take action on their own behalf in  connection
         with any such  Insolvency  Proceeding as may be necessary to reasonably
         protect the Tranche C Lenders' interests, as long as such action is not
         contrary to or in conflict with the actions and interests of the Senior
         Credit  Parties  and  is  always  in  second  position  to  the  Senior
         Obligations;  provided,  however,  that in the  event of an  Insolvency
         Proceeding  in which  none of the claims of the  Tranche C Lenders  has
         been assigned to the same class of claims as the Senior Credit Parties,
         the  Tranche C Lenders  shall have the right to vote their own  claims,
         but hereby  agree not to vote their  claims in any manner  which  would
         effect,  or  attempt to effect,  a "cram  down" plan of  reorganization
         pursuant to Section  1129(b) of the Bankruptcy Code with respect to the
         Senior Credit Parties.

         In the event  the  Collateral  Agent  supports  use of cash  collateral
(excluding  any  funds in the  Tranche C  Pre-Funded  Interest  Account)  by the
Borrower or any of its  Subsidiaries  or in the event the Senior Credit  Parties
elect to provide debtor-in-possession financing to the Borrower or



                                       52

<PAGE>



any of its Subsidiaries  pursuant to Section 364 of the Bankruptcy Code, none of
the Tranche C Lenders  shall object to such use of such cash  collateral or such
debtor-in-possession financing.

         In no event  shall the holders of the Senior  Obligations  be liable to
any of the Tranche C Lenders or any other  holders of the Tranche C  Obligations
for any failure to prove the Tranche C  Obligations,  to exercise any right with
respect  thereto or to collect any sums payable  thereon.  A  distribution  made
under this Section 2.15 to holders of Senior  Obligations  that otherwise  would
have been made to holders of the  Tranche C  Obligations  is not, as between the
Borrower, its other creditors and holders of Tranche C Obligations, a payment by
the Borrower on the Senior Obligations,  it being understood that the provisions
of this Section 2.15 are solely for the purpose of defining the relative  rights
of the  holders of Tranche C  Obligations,  on the one hand,  and the holders of
Senior  Obligations on the other hand. Each of the Tranche C Lenders  represents
that the  Tranche C Lenders are the sole  holders of the  Tranche C  Obligations
and,  except  upon  satisfaction  of the  conditions  set forth in Section  13.5
hereof, shall not assign, participate or transfer all or any part of the Tranche
C Obligations or any interest therein until the Senior Obligations are repaid in
full in cash or otherwise  satisfied to the  satisfaction  of the Senior  Credit
Parties and the Senior Commitments are terminated.

         (f) Duration and Termination.  The agreements contained in this Section
2.15 shall constitute a continuing  agreement of  subordination  with respect to
the Tranche C Obligations, and shall remain in effect until indefeasible payment
in  full  in  cash  or  other  satisfaction  of the  Senior  Obligations  to the
satisfaction  of the  Senior  Credit  Parties  and  termination  of  the  Senior
Commitments.  The Senior  Credit  Parties may,  without  notice to the Tranche C
Representative  or any of the Tranche C Lenders,  extend or continue  credit and
make other  financial  accommodations  to or for the account of the  Borrower in
reliance upon this Section 2.15.

         (g) Tranche C Lenders' Waivers.  All of the Senior Obligations shall be
deemed to have been made or incurred in reliance upon this Section 2.15. Each of
the Tranche C Lenders  expressly  waives all notice of the  acceptance by Senior
Credit Parties,  or any of them, of the  subordination  and other  provisions of
this Section 2.15 and all other notices not  specifically  required  pursuant to
the  terms of this  Agreement  whatsoever,  and each of the  Tranche  C  Lenders
expressly  consents to reliance by each of the Senior  Credit  Parties  upon the
subordination  and other  agreements as herein  provided.  Each of the Tranche C
Lenders  agrees that none of the Senior  Credit  Parties has made  warranties or
representations  with  respect  to  the  due  execution,   legality,   validity,
completeness or  enforceability  of this Agreement or the  collectibility of the
Obligations hereunder,  that each of the Senior Credit Parties shall be entitled
to manage and supervise their Senior Loans in accordance with Applicable Law and
their usual practices, modified from time to time as they deem appropriate under
the  circumstances,  and that none of the Senior  Credit  Parties shall have any
liability  to any Tranche C Lender  for,  and each  Tranche C Lender  waives any
claim which such Tranche C Lender may now or  hereafter  have against the Senior
Credit Parties, or any of them, arising out of (i) any and all actions which the
Senior  Credit  Parties,  or any of them,  may take or omit to take  (including,
without  limitation,  actions  with  respect  to  the  creation,  perfection  or
continuation  of Liens  on or  security  interests  in the  Senior  Obligations,
actions with respect to the occurrence of a Default or Event of Default, actions
with respect to the foreclosure  upon,  sale,  release,  or depreciation  of, or
failure  to  realize  upon,  the  Collateral  and  actions  with  respect to the
collection of any claim for all or any part of the Senior  Obligations  from any
account  debtor,  guarantor or any other  party) with  respect to the  documents
regarding the Senior  Obligations or any other  agreement  related thereto or to
the collection of the Senior  Obligations or the valuation,  use,  protection or
release of the Collateral and/or other security for the Senior Obligations, (ii)
the election by the Senior Credit  Parties,  or any of them,  in any  Insolvency
Proceeding, and/or (iii) any borrowing of, or grant of a security interest under
Section 364 of the Bankruptcy Code to, the Borrower as debtor-in-possession.



                                       53

<PAGE>



         (h) No Contest of Security  Interest.  The Tranche C Lenders agree that
they shall not contest the validity, perfection or enforceability of any Lien or
Security Interest granted to the Collateral Agent on behalf of the Senior Credit
Parties by the Borrower or any other obligor of the Senior Obligations, and each
of the  Tranche C Lenders  agrees to  cooperate  in the  defense  of any  action
contesting the validity,  perfection or enforceability of such Liens or Security
Interest. Nothing in this Section 2.15 shall be construed as in any way limiting
a party's right to enforce the order of priorities of Liens and Indebtedness set
forth in this Agreement as against any other Person.

         (i) Subordination Not Affected.  The subordinations  effected,  and the
rights created,  by this Section 2.15 shall not be affected by (a) any amendment
of or any addition of or  supplement  to any  instrument,  document or agreement
relating to the Senior  Obligations  (other  than  specific  amendments  of this
Section 2.15),  (b) any exercise or non-exercise  of any right,  power or remedy
under or in respect of the Senior  Obligations  or any  instrument,  document or
agreement relating thereto,  (c) the release,  sale,  exchange or surrender,  in
whole or in part, of any part of the Collateral or any additional  collateral to
which any Credit Party may become entitled,  (d) any release of any guarantor of
or pledgor securing the Obligations or any security for such pledge or guaranty,
or  (e)  any  waiver,  consent,   release,   indulgence,   extension,   renewal,
modification,  delay or other  action,  inaction  or  omission in respect of the
Senior Obligations or any instrument,  document or agreement relating thereto or
any security therefor or pledge or guaranty thereof,  whether or not the Tranche
C  Lenders  shall  have had  notice or  knowledge  of any of the  foregoing  and
regardless  of whether the Tranche C Lenders  shall have  consented  or objected
thereto.

         (j) Voided Payments.  To the extent that the Borrower makes any payment
on the Senior  Obligations  which is  subsequently  invalidated,  declared to be
fraudulent,  avoidable or preferential, set aside or is required to be repaid to
a trustee,  receiver,  the estate of the  Borrower  or any other party under any
bankruptcy  act,  state or federal  law,  common law or  equitable  cause  (such
payment being hereinafter referred to as a "Voided Payment"), then to the extent
of such Voided  Payment  that portion of the Senior  Obligations  which had been
previously  satisfied  by such Voided  Payment  shall be revived and continue in
full  force and effect as if such  Voided  Payment  had never been made.  In the
event  that a Voided  Payment is sought to be  recovered  from any of the Senior
Credit Parties, an "Event of Default" hereunder shall be deemed to have occurred
and to be  continuing  from the date of such  recovery  from such Senior  Credit
Party of such Voided  Payment  until the full  amount of such Voided  Payment is
fully and finally  restored to such Senior  Credit Party and until such time the
provisions of this Section 2.15 shall be in full force and effect.

         (k)  Violation  of  Agreement  by the  Borrower.  The  Borrower  hereby
consents to the  provisions of this Section  2.15,  agrees to abide by the terms
hereof,  agrees to make no payments or  distributions  contrary to the terms and
provisions  hereof  and to do every  act and thing  necessary  to carry out such
terms and  provisions.  The  Borrower  agrees that should it make any payment in
contravention  of any  provision of this Section 2.15 the maturity of the Senior
Obligations may be accelerated in accordance with the terms of this Agreement.

         (l)  Waiver.  Regardless  of the  due  date  of any  of the  Tranche  C
Obligations  and except as permitted by this Section 2.15, each of the Tranche C
Lenders hereby expressly waives any and all rights to payment by the Borrower of
the  Tranche  C  Obligations  prior  to  repayment  in full  in  cash  or  other
satisfaction of the Senior  Obligations to the satisfaction of the Senior Credit
Parties and termination of the Senior  Commitments.  The Tranche C Lenders agree
that,  until the Senior  Obligations have been paid in full in cash or otherwise
satisfied to the satisfaction of the


                                       54

<PAGE>



Senior  Credit  Parties,  none of the Tranche C Lenders shall be entitled to any
right of subrogation,  exoneration,  reimbursement or contribution in respect of
any of the Tranche C Obligations.

         (m) Waiver of  Marshalling.  Notwithstanding  anything to the  contrary
contained in this Section 2.15, in the event that the Senior Obligations are, or
hereafter  become,  secured by property,  instruments,  documents or  agreements
other than the Nextel  Collateral  (including,  without  limitation,  any pledge
securing or  guaranty  of the Senior  Obligations  by any  Person),  each of the
Tranche C Lenders agrees that the  Collateral  Agent shall have no obligation to
marshal such other property,  instruments,  documents,  agreements or guaranties
before  enforcing its rights against the Nextel  Collateral or its rights herein
as against the Tranche C Lenders.


                                    ARTICLE 3

                                    Guarantee


         Section 3.1 Guarantee.  Holdco hereby unconditionally guarantees to the
Senior Credit Parties and their respective  permitted successors and assigns and
the subsequent holders of the Senior Obligations (including, without limitation,
any  interest  on the  Senior  Loans  accruing  after the  filing of a  petition
initiating any Insolvency Proceeding, whether or not such interest accrues or is
recoverable  against the Borrower after the filing of such petition for purposes
of the Bankruptcy Code or is an allowed claim in such proceeding),  irrespective
of the validity and  enforceability  of this Agreement  (other than this Article
3),  the Notes or the other Loan  Documents  or the  Senior  Obligations  of the
Borrower or any of the other  Guarantors  hereunder or thereunder,  the value or
sufficiency of any  Collateral or any other  circumstance  that might  otherwise
affect the liability of a guarantor,  that: (i) the principal of and interest on
the Senior Loans,  the Notes and all other  Obligations  of the Borrower and the
other  Guarantors to the Senior Credit Parties under this  Agreement,  the Notes
and the other Loan Documents shall be promptly paid in full when due, whether at
stated  maturity,  by  acceleration  or otherwise,  in accordance with the terms
hereof  and  thereof;  and (ii) in case of any  extension  of time of payment or
renewal of any Notes or any of such other Senior Obligations,  the same shall be
promptly paid in full when due in accordance  with the terms of the extension or
renewal, whether at stated maturity, by acceleration or otherwise. The foregoing
guaranty is a guaranty of payment and not of  collection.  Failing  payment when
due of any amount so guaranteed for whatever reason, Holdco will be obligated to
pay the same immediately.

         Section 3.2 Waivers and  Releases.  Holdco hereby waives notice of, and
consents to, any extension of time of payment, renewals, releases of collateral,
delays in  obtaining  or  realizing  upon or  failures  to obtain,  perfect,  or
maintain perfection of, or realize upon collateral or other indulgence from time
to  time  granted  by any of the  Senior  Credit  Parties  in  respect  of  this
Agreement,  the Notes or any other Loan Document.  Until the Senior  Obligations
have been paid in full in cash or otherwise satisfied to the satisfaction of the
Senior Credit Parties,  Holdco hereby releases the Borrower from all, and agrees
not to assert or enforce  (whether by or in a legal or equitable  proceeding  or
otherwise) any,  "claims" (as defined in 11 U.S.C. ss. 101(4)),  whether arising
under  Applicable  Law or otherwise,  to which Holdco is or would be entitled by
virtue of its  obligations  hereunder,  any payment made pursuant  hereto or the
exercise  by the Senior  Credit  Parties  of their  rights  with  respect to any
Collateral,  including  any such  claims to which  Holdco may be  entitled  as a
result of any right of subrogation,  exoneration or reimbursement. To the extent
that the  Borrower  may not be released by Holdco  under this  Article 3, Holdco
agrees  that,  until the  Senior  Obligations  have been paid in full in cash or
otherwise  satisfied to the satisfaction of the Senior Credit Parties,  it shall
not be entitled to any


                                       55

<PAGE>



right of subrogation,  exoneration,  reimbursement or contribution in respect of
any Senior Obligations guaranteed hereby. With respect to this Agreement and the
Notes, Holdco hereby waives presentment,  protest,  demand of payment, notice of
dishonor and all other notices and demands  whatsoever.  Holdco  further  agrees
that, as between Holdco, on the one hand, and the Senior Credit Parties,  on the
other hand, (i) the maturity of the Senior Obligations  guaranteed hereby may be
accelerated  as  provided  in  Section  10.2  hereof  for the  purposes  of this
Guarantee,  notwithstanding any stay, injunction or other prohibition preventing
such acceleration in respect of the Senior  Obligations  guaranteed  hereby, and
(ii) in the event of any declaration of acceleration of such Senior  Obligations
as provided in Section  10.2  hereof,  such Senior  Obligations  (whether or not
otherwise due and payable) shall forthwith  become due and payable by Holdco for
purposes of this guarantee. The Obligations of Holdco under this Article 3 shall
be automatically reinstated if and to the extent that for any reason any payment
by or on behalf of the Borrower is  rescinded  or must  otherwise be restored by
any holder of any of the Senior Obligations  guaranteed hereunder,  whether as a
result of any  proceedings  in bankruptcy or  reorganization  or otherwise,  and
Holdco agrees that it will  indemnify  the Senior  Credit  Parties on demand for
their   out-of-pocket  costs  and  expenses   (including,   without  limitation,
reasonable  fees and expenses of counsel)  incurred by the Senior Credit Parties
in connection with such rescission or restoration.

         Section 3.3       Miscellaneous.

         (a) Upon the bankruptcy or winding up or other  distribution  of Assets
of the Borrower or any  Subsidiary of the Borrower or of any surety or guarantor
for any of Senior  Obligations of the Borrower to the Senior Credit Parties,  or
any of them, the rights of the Senior Credit Parties against Holdco shall not be
affected  or impaired by the  omission of any Senior  Credit  Party to prove its
claim,  or to prove its full  claim,  and the  Collateral  Agent may prove  such
claims  as it  sees  fit and may  refrain  from  proving  any  claim  and in its
discretion may value as it sees fit or refrain from valuing any security held by
it without in any way releasing,  reducing or otherwise  affecting the liability
to any Senior Credit Party of Holdco.

         (b) Holdco absolutely,  unconditionally  and irrevocably waives any and
all right to assert any defense,  set-off,  counterclaim  or  cross-claim of any
nature  whatsoever  with respect to this Article 3 or the  obligations of Holdco
hereunder or the  obligations of any other Person or party  (including,  without
limitation,  the Borrower)  relating to this Article 3 or the obligations of any
other  guarantor  with  respect  to the  Senior  Obligations  in any  action  or
proceeding  brought by any Senior Credit Party to collect the Senior Obligations
or any portion  thereof,  or to enforce  the  obligations  of Holdco  under this
Article 3.

         (c) The Senior Credit  Parties,  or any of them, may from time to time,
without  exonerating  or releasing  Holdco in any way under this  Guaranty,  (i)
release,  discharge,  abandon  or  otherwise  deal with or fail to deal with any
guarantor or surety of the Guaranteed  Obligations or any security or securities
therefor or any part thereof now or hereafter held by the  Administrative  Agent
or (ii)  amend,  modify,  extend,  accelerate  or waive in any manner any of the
provisions, terms, or conditions of the Loan Documents, all as they may consider
expedient or appropriate in their sole discretion or (iii) act or fail to act in
any manner  referred to in this Article 3 without  regard to whether such action
or inaction may deprive Holdco of its right to subrogation  against the Borrower
to recover  full  indemnity  for any payments  made  pursuant to this Article 3.
Without  limiting the  generality of this Article 3, it is  understood  that the
Senior Credit Parties may, without  exonerating or releasing Holdco, give up, or
modify or abstain from  perfecting  or taking  advantage of any security for the
Senior  Obligations  and accept or make any  compositions or  arrangements,  and
realize upon any security for the Senior  Obligations  when, and in such manner,
as such Person may deem expedient, all without notice to Holdco.


                                       56

<PAGE>



         (d) If a claim is ever  made upon the  Senior  Credit  Parties  for the
repayment  or  recovery  of any amount or  amounts  received  by such  Person in
payment of any of the Senior  Obligations  and such Person repays all or part of
such  amount  by  reason  of (i) any  judgment,  decree or order of any court or
administrative body having jurisdiction over such Person or any of its property,
or (ii) any  settlement or compromise of any such claim  effected by such Person
with any such claimant,  including the Borrower, then in such event Holdco shall
be and remain  obligated  to such Person  hereunder  for the amount so repaid or
recovered  to the same  extent  as if such  amount  had  never  originally  been
received by such Person.

         (e) Holdco  expressly  represents and  acknowledges  that any financial
accommodations  by the Senior Credit  Parties,  or any of them, to the Borrower,
including  without  limitation the extension of the Senior Loans are and will be
of direct interest, benefit and advantage to Holdco.


                                    ARTICLE 4

                              Conditions Precedent

         Section 4.1 Conditions Precedent to Initial Advance of the Loans and to
the Issuance of the Initial  Letter of Credit.  The obligation of the Lenders to
undertake  their  respective  Commitments and to make the initial Advance of the
Senior Loans, and of the Issuing Bank to issue the initial Letter of Credit,  is
subject to the prior fulfillment of each of the following conditions:

         (a) The Administrative  Agent shall have received each of the following
(with copies for each of the Lenders  which have  requested  same),  in form and
substance satisfactory to the Arrangers and each of the Lenders, as applicable:

                  (i)      this duly executed Agreement;

                  (ii) the duly executed Notes (other than the Tranche C Notes);

                  (iii)    the  duly  executed   Borrower's   Pledge  Agreement,
                           together with appropriate original stock certificates
                           and  undated   stock  powers  with  respect   thereto
                           executed in blank;

                  (iv)     the duly executed Security  Agreement,  together with
                           evidence of the filing of appropriate UCC-1 financing
                           statement forms;

                  (v)      the loan certificate of the Borrower, in
                           substantially the form attached hereto as Exhibit Y,
                           including a certificate of incumbency with respect to
                                                 ---------
                           each Authorized Signatory, together with appropriate
                           attachments which shall include without limitation,
                           the following items: (A) a copy of the certificate of
                           incorporation of the Borrower, certified to be
                           complete and correct by the Secretary of State of the
                           State of Delaware, and a complete and correct copy of
                           the by-laws of the Borrower; (B) certificates of good
                           standing for the Borrower issued by the Secretary of
                           State or similar state official for each state in
                           which the Borrower has qualified to do business;
                           (C) a true, complete and correct copy of the
                           resolutions of the board of directors of the
                           Borrower, authorizing the Borrower to execute,
                           deliver and perform this Agreement and the other Loan
                           Documents to which it is a party; and (D) a complete
                           and correct copy of any agreement in effect with


                                       57

<PAGE>



                           respect to the voting rights, ownership interests, or
                           management of the Borrower;

                  (vi)     the duly executed  Subsidiary  Guaranty  executed and
                           delivered by each Subsidiary of the Borrower;

                  (vii)    the  duly  executed   Subsidiary  Security  Agreement
                           (Senior Obligations),  executed and delivered by each
                           Subsidiary  of  the  Borrower,  together  appropriate
                           UCC-l financing statement forms;

                  (viii)   the duly executed  Subsidiary  Pledge  Agreement from
                           each Subsidiary of the Borrower which has one or more
                           corporate  Subsidiaries,  together  with  appropriate
                           original stock  certificates and undated stock powers
                           with respect thereto executed in blank;

                  (ix)     a loan certificate from each Guarantor, in
                           substantially the form attached hereto as Exhibit Z,
                           including a certificate of incumbency with respect to
                                                 ---------
               each officer  authorized  to execute Loan  Documents on behalf of
               such Guarantor, together with appropriate attachments which shall
               include,  without limitation,  the following items: (A) a copy of
               the certificate or articles of  incorporation  of such Guarantor,
               certified to be complete and correct by the Secretary of State of
               the state of such Guarantor's  organization;  (B) certificates of
               good standing for such Guarantor issued by the Secretary of State
               or similar state  official for each state in which such Guarantor
               has qualified to do business;  (C) a complete and correct copy of
               the  by-laws of such  Guarantor;  and (D) a complete  and correct
               copy  of the  resolutions  of the  board  of  directors  of  such
               Guarantor  authorizing  such  Guarantor  to execute,  deliver and
               perform the Loan Documents to which it is a party;

                  (x)      the duly executed  Holdco Pledge  Agreement  pledging
                           all of the Capital  Stock of the  Borrower,  together
                           with  appropriate  original  stock  certificates  and
                           undated stock powers with respect thereto executed in
                           blank;

                  (xi)     the duly executed Intercreditor Agreement;

                  (xii)    the  duly  executed  Trademark  Security   Agreement,
                           together with appropriate filing coversheet;

                  (xiii) the duly executed Assignment of Acquisition Documents;

                  (xiv)    copies of insurance binders or certificates  covering
                           the Assets of the Borrower and its Subsidiaries,  and
                           otherwise  meeting  the  requirements  of Section 6.5
                           hereof;

                  (xv)     a  Non-Disturbance  Agreement with respect to each of
                           the Tower  Sites  owned or leased by the  Borrower or
                           any of its  Subsidiaries on the Agreement Date, after
                           giving  effect  to  the  Nextel  Acquisition,  to the
                           extent that space on the Towers located at such Tower
                           Sites has been leased to a Nextel Tenant;


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<PAGE>



                  (xvi)    legal  opinions,  dated as of the Agreement  Date, of
                           Dow,  Lohnes &  Albertson,  PLLC,  as loan  documents
                           counsel and Paul, Weiss, Rifkind, Wharton & Garrison,
                           as  acquisition  counsel to Holdco,  the Borrower and
                           its  Subsidiaries in connection with the transactions
                           contemplated  by the  Nextel  Acquisition  Documents,
                           this  Agreement  and the other Loan  Documents;  each
                           addressed  to the  Arrangers  and  the  other  Credit
                           Parties,  in form and substance  satisfactory  to the
                           Arrangers and their counsel;

                  (xvii)   a duly  executed  Request for Advance for the initial
                           Advance  of  the  Senior  Loans,  which  Request  for
                           Advance,  as of the  Agreement  Date and after giving
                           pro forma effect to the Nextel Acquisition, shall (A)
                           set  forth  the  Borrowing  Base  Amount  as  of  the
                           Agreement Date and the detailed  calculation thereof,
                           and (B)  demonstrate  that, as of the Agreement Date,
                           the Borrower shall (I) have  Annualized  EBITDA of at
                           least  $23,000,000,  and  (II)  own  at  least  2,100
                           Towers;

                  (xviii) the duly executed Use of Proceeds Letter;

                  (xix)    the duly executed  Certificate of Financial Condition
                           for  the   Borrower   and  its   Subsidiaries   on  a
                           consolidated  basis,  given  by the  chief  financial
                           officer  of  the  Borrower   which  shall  include  a
                           certification that, since December 31, 1998, no event
                           has occurred  which would,  with the passage of time,
                           be  reasonably  likely to have a  Materially  Adverse
                           Effect after giving effect to the Nextel Acquisition;

                  (xx)     copies of all  consents  of any  Person,  and filings
                           with any Governmental  Authority (including,  without
                           limitation,  consents  of the  holders  of the Holdco
                           2008 Notes and  Hart-Scott  Rodino  filings)  made or
                           obtained in connection with the Nextel Acquisition or
                           the  transactions  contemplated by this Agreement and
                           the other Loan Documents;

                  (xxi)    except as set forth in Section 4.5(c) hereof,  a duly
                           executed lien  termination  agreement and  recordable
                           Lien releases with respect to any Liens which are not
                           Permitted  Liens  hereunder  upon the  Assets  of the
                           Borrower  and its  Subsidiaries,  and with respect to
                           any other  Indebtedness  which is not Permitted  Debt
                           hereunder; and

                  (xxii)   all such other documents as either the Administrative
                           Agent or any Lender may reasonably request, certified
                           by  an  appropriate   governmental   official  or  an
                           Authorized Signatory if so requested.

         (b) The Arrangers  shall have received  evidence  satisfactory  to them
that all material Necessary Authorizations,  including all necessary consents to
the  execution,  delivery and  performance by the Borrower of this Agreement and
the  other  Loan  Documents  to  which  it is a  party  and by  Holdco  and  the
Subsidiaries  of the  Borrower of the Loan  Documents to which they are parties,
have been obtained or made,  are in full force and effect and are not subject to
any pending or threatened reversal or cancellation, and the Administrative Agent
shall have received a certificate of an Authorized Signatory so stating.

         (c) The Arrangers  shall have received  complete and correct  copies of
any employment agreements of the Borrower and each of the Guarantors.


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         (d) The Credit  Parties shall receive  payment of all fees and expenses
due  and  payable  on  the  Agreement  Date  in  respect  of  the   transactions
contemplated hereby.

         (e)  The  Arrangers  shall  have  received  the  Borrower's   financial
projections,  after  giving  effect  to  the  transactions  contemplated  hereby
(including,  without  limitation,  consummation of the Nextel  Acquisition) on a
fiscal year basis through the Tranche B Maturity  Date,  and on a fiscal quarter
basis through December 31, 2001 (together with any revisions thereof required to
be delivered by the Borrower pursuant to the terms hereof,  the  "Projections"),
and the  Arrangers  shall  not be aware  of any  information  or  other  matters
affecting  the assets or rights to be  acquired  in  connection  with the Nextel
Acquisition,  or the other  transactions  contemplated by this Agreement and the
other Loan  Documents,  which  information  is  inconsistent  in a material  and
adverse  manner  with  any  information  disclosed  in  the  Nextel  Acquisition
Documents,  which  information could reasonably be expected to have a Materially
Adverse Effect.

         (f) The Arrangers shall have received,  with respect to at least ninety
percent  (90%) of the  Tower  Sites  owned or  leased  by the  Borrower  and its
Subsidiaries  on  the  Agreement  Date,   after  giving  effect  to  the  Nextel
Acquisition, a report (as set forth on Schedule 5.1(cc) attached hereto) setting
forth the  following  information  with  respect  to such Tower  Sites:  (i) the
location of such Tower Sites,  (ii) the dates of final termination or expiration
of all Tower Site Lease Agreements and Tower Space Lease  Agreements  applicable
to such Tower Sites, (iii) current anchor tenants and Co-Locators,  and capacity
for additional tenants, on such Tower Sites, and (iv) with respect to any leased
Tower Sites, whether the consent of the landlord of such Tower Sites is required
for an assignment of the Tower Site Lease Agreement with respect thereto.

         (g) The  Arrangers  shall  have  received  a  certificate  of the chief
financial officer of Holdco  satisfactory to each of them and their counsel that
Holdco has  received  Contributed  Capital of not less than  $230,000,000  on or
prior to the Agreement  Date pursuant to the Holdco Equity  Documents,  and that
Welsh has directly invested at least $155,000,000 of such Contributed Capital.

         (h) All legal matters  incident to this Agreement and the  consummation
of the transactions  contemplated hereby shall be reasonably satisfactory to the
Arrangers and their counsel.

         (i) As an additional  condition precedent to the initial Advance of the
Senior Loans and the  issuance of the initial  Letter of Credit  hereunder,  the
Arrangers  shall have received  evidence  satisfactory  to each of them that the
Borrower shall have received at least  $160,000,000 in proceeds of the Tranche C
Loans or  $150,000,000  in gross  proceeds of  Permitted  High-Yield  Securities
issued in lieu thereof.

         (j) As a condition precedent to the initial Advance of the Senior Loans
and the issuance of the initial Letter of Credit hereunder,  the Arrangers shall
have received evidence satisfactory to them that all conditions precedent to the
Tower Sub Merger shall have been satisfied,  and that the Tower Sub Merger shall
be  consummated  simultaneously  with the funding of the initial  Advance of the
Senior Loans.

         (k) The  Tranche C Lenders  shall  have  received  2,000,000  shares of
common Capital Stock of Holdco.

         (l) As an additional  condition precedent to the initial Advance of the
Revolving Loans, the Revolving Loan Availability Date shall have occurred.


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<PAGE>



         Section 4.2 Conditions Precedent to Each Advance. The obligation of the
Lenders and the Tranche C Lenders to make each  Advance  (including  the initial
Advance  hereunder)  is  subject  to the  fulfillment  of each of the  following
conditions immediately prior to or contemporaneously with such Advance:

         (a) All of the  representations  and warranties made by or with respect
to  Holdco,  the  Borrower  and its  Subsidiaries,  or any of them,  under  this
Agreement and the other Loan Documents,  which,  pursuant to Section 5.2 hereof,
are made at and as of the time of such  Advance,  shall be true and  correct  at
such time in all material  respects,  both before and after giving effect to the
application of the proceeds of such Advance;

         (b) There  shall not exist,  on the date of the making of such  Advance
and after giving effect to the proceeds of such  Advance,  a Default or Event of
Default hereunder,  the  Administrative  Agent shall have received a Request for
Advance  signed by an  Authorized  Signatory so  certifying,  which  Request for
Advance  shall also (i) certify the  Borrower's  compliance  with the  Financial
Covenants,  (ii) provide  calculations  demonstrating the Borrower's  compliance
with Section 9.1 hereof  before and after  giving  effect to such  Advance,  and
(iii) with respect to Advances  made prior to the  Revolving  Loan  Availability
Date,  provide  calculations  demonstrating  the Borrowing Base Amount as of the
date of such Advance; and

         Section 4.3 Conditions  Precedent to Issuance of Each Letter of Credit.
The  obligation  of the Issuing Bank to issue any Letter of Credit  hereunder is
subject to the prior fulfillment of each of the following conditions:

         (a) All of the  representations  and warranties made by or with respect
to  Holdco,  the  Borrower  and its  Subsidiaries,  or any of them,  under  this
Agreement and the other Loan Documents,  which,  pursuant to Section 5.2 hereof,
are made at and as of the time of the  issuance of such Letter of Credit,  shall
be true and correct at such time in all material respects, both before and after
giving effect to the issuance of such Letter of Credit; and

         (b) There shall not exist,  on the date of the  issuance of such Letter
of Credit  and after  giving  effect  thereto,  a  Default  or Event of  Default
hereunder,  and the  Administrative  Agent  shall have  received  a Request  for
Issuance of Letter of Credit so certifying.

         Section 4.4 Conditions  Precedent to the Funding of each Advance of the
Tranche C Loans.  The funding of each  Advance of the Tranche C Loans is subject
to the prior fulfillment of each of the following conditions:

         (a) The Administrative Agent shall have received each of the following,
in form and substance satisfactory to the Arrangers:

                  (i)      a duly executed Joinder Agreement executed by each of
                           the Tranche C Lenders funding such Advance;

                  (ii)     a duly  executed  Tranche  C Note  in  favor  of each
                           Tranche C Lender  funding  such  Advance in an amount
                           equal to such  Tranche  C  Lender's  Tranche C Credit
                           Ratio times the  aggregate  amount of such Advance of
                           the Tranche C Loans;

                  (iii)    with respect to the initial  Advance of the Tranche C
                           Loans, the duly executed Tower Sub Guaranty  executed
                           and delivered by Tower Sub;


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<PAGE>



                  (iv)     with respect to the initial  Advance of the Tranche C
                           Loans,   the  duly   executed   Subsidiary   Security
                           Agreement  (Tranche  C  Obligations),   executed  and
                           delivered  by Tower Sub,  together  with  appropriate
                           UCC-l financing statement forms, if necessary;

                  (v)      with respect to the initial  Advance of the Tranche C
                           Loans,   the  duly  executed   Tranche  C  Pre-Funded
                           Interest Account Pledge Agreement; and

                  (vi)     all such other documents as either the Administrative
                           Agent or any Tranche C Lender may reasonably request,
                           certified by an appropriate  governmental official or
                           an Authorized Signatory if so requested.

         (b) The  Borrower  and the  Tranche  C  Lenders  shall  have  given the
Administrative  Agent at least twenty (20) days' prior  written  notice of their
intention to fund such  Advance of the Tranche C Loans,  which notice shall also
set forth the  proposed  amount of such  Advance and the Tranche C Credit  Ratio
with respect to each Tranche C Lender funding such Advance.

         (c) The Majority  Lenders shall have given their prior written  consent
to the  funding of such  Advance on the terms set forth in the notice  delivered
pursuant to Section 4.4(b).

         (d) A portion of such Advance in an amount  sufficient to make interest
payments on such  Advance  during the Tranche C Pre-Fund  Period shall be funded
directly to the Tranche C Pre-Funded Interest Account.

         (e) The date of the  funding  of such  Advance  of the  Tranche C Loans
shall occur on or before the third anniversary of the Agreement Date.

         (f) There shall not exist, on the date of the making of such Advance of
the Tranche C Loans and after giving effect to the proceeds of such  Advance,  a
Default or Event of  Default  hereunder,  the  Administrative  Agent  shall have
received a Request for Advance signed by an Authorized  Signatory so certifying,
which Request for Advance shall also (i) certify the Borrower's  compliance with
the  Financial  Covenants,  and  (ii)  provide  calculations  demonstrating  the
Borrower's  compliance with Section 9.1 hereof before and after giving effect to
such Advance.

         Section 4.5  Conditions  Subsequent  to Agreement  Date. As a condition
subsequent to the funding of the Tranche B Loans,  and the making of the initial
Advance of the Tranche A Loans  hereunder,  on the Agreement  Date, the Borrower
shall  perform  or cause to be  performed  the  following  (the  failure  by the
Borrower to so perform or cause to be performed constituting an Event of Default
hereunder):

         (a)  Mortgages.  Within  ninety (90) days of the  Agreement  Date,  the
Borrower  shall  deliver  to the  Arrangers,  Mortgages  (fee or  leasehold,  as
applicable)  with  respect  to the 500 Tower  Sites and  other  parcels  of real
property identified on Schedule 6.10.

         (b) Tower Site  Lease  Agreements  and Tower  Space  Lease  Agreements.
Within thirty (30) days of the Agreement Date, the Borrower shall deliver to the
Arrangers a list  supplementing  Schedule  5.1(cc) and setting forth,  as of the
Agreement  Date,  all of the Tower Site Lease  Agreements  and Tower Space Lease
Agreements of the Borrower and its Subsidiaries.

         (c) Lien  Releases.  On or before  October 20, 1999, the Borrower shall
use its  reasonable  best efforts to deliver to the  Arrangers  recordable  Lien
releases with respect to any


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<PAGE>



Liens on the Nextel  Collateral  held by The Chase  Manhattan Bank. The Borrower
shall  deliver  to the  Arrangers  a  written  report  detailing  the  status of
obtaining such releases on or before each of May 20, 1999,  June 20, 1999,  July
20, 1999, August 20, 1999 and September 20, 1999.

         (d) Landlord  Waivers.  On or before  September 30, 1999,  the Borrower
shall deliver to the Arrangers a duly executed  landlord  waiver  agreement,  in
form and substance satisfactory to the Arrangers and their counsel, with respect
to each of (i)  the  Borrower's  principal  place  of  business,  and  (ii)  the
Borrower's premises located at One Chase Corporate Drive, Hoover, Alabama.

         (e) Partners Master Site Lease  Agreement.  Promptly upon the execution
and delivery of the Partners Master Site Lease Agreement by the parties thereto,
the Borrower  shall  deliver to the Arrangers a complete and correct copy of the
Partners Master Site Lease  Agreement,  together with all exhibits and schedules
thereto.


                                    ARTICLE 5

                         Representations and Warranties

         Section  5.1  Representations  and  Warranties.  Each of Holdco and the
Borrower,  for itself and on behalf of each of its Subsidiaries,  hereby agrees,
represents and warrants in favor of each of the Credit Parties that:

         (a) Organization;  Ownership; Power; Qualification. Each of Holdco, the
Borrower and each of the Borrower's Subsidiaries is a corporation or other legal
entity duly organized,  validly  existing and in good standing under the laws of
the state of its  incorporation  or  organization,  has the  corporate  or other
organizational  power and  authority to own or lease and operate its  properties
and to  carry  on its  business  as  now  being  and  hereafter  proposed  to be
conducted.  Each of Holdco, the Borrower and each of the Borrower's Subsidiaries
is duly  qualified,  in good  standing  and  authorized  to do  business in each
jurisdiction  in which the  character  of its  properties  or the  nature of its
businesses  makes such  qualification  or  authorization  prudent  except  where
failure to be so  qualified,  in good  standing or  authorized  would not have a
Materially Adverse Effect.

         (b) Authorization; Enforceability. The Borrower has the corporate power
and has taken all necessary action,  corporate or otherwise,  to authorize it to
borrow hereunder, to execute, deliver and perform this Agreement and each of the
other Loan Documents to which it is a party in accordance with their  respective
terms,  and to  consummate  the  transactions  contemplated  hereby and thereby.
Holdco has the corporate power and has taken all necessary action,  corporate or
otherwise,  to authorize it to execute,  deliver and perform this  Agreement and
each of the other Loan Documents to which it is a party in accordance with their
respective  terms,  and to consummate the transactions  contemplated  hereby and
thereby.   Each   Subsidiary   of  the  Borrower  has  the  corporate  or  other
organizational power and has taken all necessary action, corporate or otherwise,
to  authorize it to execute,  deliver and perform each of the Loan  Documents to
which it is a party in accordance with their  respective terms and to consummate
the transactions contemplated by this Agreement and by such Loan Documents. This
Agreement,  and each of the other Loan  Documents  to which any of  Holdco,  the
Borrower  or any of the  Borrower's  Subsidiaries  is a  party,  has  been  duly
executed and delivered by Holdco,  the Borrower or such Subsidiary,  as the case
may be, and is a legal,  valid and binding obligation of Holdco, the Borrower or
such Subsidiary, as applicable, enforceable against Holdco, the Borrower or such
Subsidiary,  as the case may be, in  accordance  with its  terms,  except to the
extent that


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<PAGE>



enforcement  thereof  may be limited  by  bankruptcy,  insolvency,  liquidation,
reorganization,  reconstruction and other similar laws affecting  enforcement of
creditors'  rights generally  (insofar as any such law relates to any Insolvency
Proceeding of Holdco, the Borrower or such Subsidiary, as applicable) and by the
application of general equitable principles.

         (c) Capital Stock,  Corporate  Organization and Related Matters.  As of
the  Agreement  Date,  after  giving  effect  to  the  Nextel  Acquisition,  the
capitalization of Holdco will be as set forth on Schedule 5.1(c) hereof.  Holdco
owns all of the issued and  outstanding  Capital Stock of the Borrower,  and the
Borrower  owns all of the issued and  outstanding  Capital  Stock of each of its
Subsidiaries  and has the  unrestricted  right to vote such Capital Stock. As of
the  Agreement  Date,  the Borrower  does not have any  Subsidiaries  other than
Merger Sub and Tower Sub.  All of the issued and  outstanding  shares of Capital
Stock of the Borrower and its Subsidiaries have been duly authorized and validly
issued and are fully paid and nonassessable, and are free and clear of all Liens
(except for  Permitted  Liens).  None of such  Capital  Stock has been issued in
violation  of the  Securities  Act,  or the  securities,  "Blue  Sky"  or  other
Applicable Laws of any applicable jurisdiction. As of the Agreement Date, except
as set forth on  Schedule  5.1(c),  none of Holdco,  the  Borrower or any of the
Borrower's Subsidiaries has outstanding any stock or securities convertible into
or  exchangeable  for  any  shares  of its  Capital  Stock,  nor are  there  any
preemptive  or similar  rights to  subscribe  for or to  purchase,  or any other
rights to subscribe  for or to purchase,  or any options for the purchase of, or
any agreements  providing for the issuance  (contingent or otherwise) of, or any
calls, commitments,  or claims of any character relating to, any of such Capital
Stock or any stock or securities  convertible  into or  exchangeable  for any of
such Capital Stock.  As of the Agreement  Date,  except as set forth on Schedule
5.1(c),  none of Holdco,  the Borrower or any of the Borrower's  Subsidiaries is
subject to any  obligation  (contingent or otherwise) to repurchase or otherwise
acquire or retire any shares of its Capital  Stock or to register  any shares of
its Capital Stock,  and there are no agreements  restricting the transfer of any
shares of Capital Stock of any of Holdco,  the Borrower or any of the Borrower's
Subsidiaries  or restricting  the ability of any Subsidiary of the Borrower from
making  distributions,  dividends or other Restricted  Payments to the Borrower.
Except  as set  forth on  Schedule  5.1(c),  within  the  five  (5) year  period
immediately  preceding the Agreement  Date,  neither the Borrower nor any of its
Subsidiaries  has  changed  its  name  nor  has  the  Borrower  or  any  of  its
Subsidiaries transacted business under any other name or trade name.

         (d) Compliance with Other Loan Documents and Contemplated Transactions.
The execution, delivery and performance by each of Holdco, the Borrower and each
of the  Borrower's  Subsidiaries  of this  Agreement  and each of the other Loan
Documents to which it is a party in accordance with their respective  terms, and
the consummation of the transactions contemplated hereby and thereby, do not and
will not (i) with  respect  to any  Material  Towers,  require  any  consent  or
approval,  governmental or otherwise,  not already obtained, (ii) violate in any
material  respect   Applicable  Law  respecting  Holdco,  the  Borrower  or  any
Subsidiary of the Borrower  (including,  without limitation,  the Communications
Act or any rule,  regulation  or policy of the FCC, the FAA or any other grantor
of a Necessary  Authorization),  (iii) conflict with,  result in a breach of, or
constitute a default under the certificate or articles of incorporation, by-laws
or other governing documents of Holdco, the Borrower or of any Subsidiary of the
Borrower,  or, except as set forth on Schedule  5.1(h)  hereof,  in any material
respect under any material indenture,  agreement, or other instrument,  to which
Holdco,  the Borrower or any  Subsidiary  of the Borrower is a party or by which
any of them or their  respective  properties  may be bound,  including,  without
limitation, the Indentures, (iv) subject to the filing of post-consummation name
change notices with the FCC, conflict with, result in a breach of, or constitute
a  default  or  violation  of,  the  terms  and   conditions  of  any  Necessary
Authorization  with respect to any Material Towers,  or (v) result in or require
the creation or imposition of any Lien


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<PAGE>



upon or with respect to any property now owned or hereafter  acquired by Holdco,
the Borrower or any of the Borrower's Subsidiaries, except for Permitted Liens.

         (e) Business.  The Borrower and each of its Subsidiaries are engaged in
the Tower  Operations and in the Other  Operations,  and in business  activities
related thereto.

         (f)  Necessary  Authorizations,  Etc.  To the  best  of the  Borrower's
knowledge,  all of the  material  Necessary  Authorizations  have  been duly and
validly  authorized and issued by the grantors  thereof to, and are legally held
by, the Borrower and its Subsidiaries. The Borrower and each of its Subsidiaries
have  obtained all material  Necessary  Authorizations,  and all of the material
Necessary Authorizations are in full force and effect, and the Borrower and each
of its  Subsidiaries  are  in  compliance  in all  material  respects  with  the
provisions  thereof.  No material Necessary  Authorization is the subject of any
pending  or,  to the best of the  Borrower's  knowledge,  threatened  attack  or
revocation,  and the Borrower is not aware of any fact or condition  which would
constitute grounds for any governmental or other licensing authority (including,
without limitation, the FCC and the FAA) to deny any pending application for any
material  Necessary  Authorization,  to  suspend,  revoke,  modify  or annul any
material Necessary Authorizations or to impose any material financial penalty on
the Borrower or any of its Subsidiaries.

         (g) Compliance with Law; Absence of Default.  Holdco,  the Borrower and
each  of the  Borrower's  Subsidiaries,  and  the  construction,  ownership  and
operation of the Towers and the conduct of the Tower  Operations by the Borrower
and its  Subsidiaries,  are in compliance in all material respects with all, and
do not violate in any  material  respect any, (i)  Applicable  Laws  (including,
without limitation,  all rules and regulations promulgated by the FCC and/or the
FAA) and/or (ii) provisions of the  certificates  or articles of  incorporation,
by-laws and other  governing  documents  of Holdco,  the  Borrower or any of the
Borrower's  Subsidiaries.  No event has occurred or failed to occur  (including,
without limitation,  any matter which could create a Default or Event of Default
hereunder  by  cross-default)  which  has  not  been  remedied  or  waived,  the
occurrence or non-occurrence of which  constitutes,  or with the passage of time
or giving of notice or both would  constitute,  (x) an Event of Default or (y) a
material default by Holdco,  the Borrower or any of the Borrower's  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 the
Borrower's  Subsidiaries  is a party or by which Holdco,  the Borrower or any of
the Borrower's  Subsidiaries or any of their respective  properties may be bound
or affected. None of Holdco, the Borrower nor any of the Borrower's Subsidiaries
is a party  to or  bound by any  contract  or  agreement  continuing  after  the
Agreement  Date,  or bound by any  Applicable  Law,  that  could  reasonably  be
expected  to have a  Materially  Adverse  Effect  or  result  in the loss of any
material Necessary Authorization.

         (h)  Title  to  Assets.   Holdco,   the  Borrower  and  the  Borrower's
Subsidiaries each has good and legal title to, or a valid leasehold interest in,
all of its respective  Assets,  and none of such Assets is subject to any Liens,
except for Permitted Liens. Except for financing statements evidencing Permitted
Liens, no financing  statement under the Uniform Commercial Code as in effect in
any jurisdiction and no other filing which names Holdco,  the Borrower or any of
the Borrower's  Subsidiaries as debtor, or which covers or purports to cover any
of the  Assets  of the  Borrower  or any  of  the  Borrower's  Subsidiaries,  is
currently effective and on file in any state or other jurisdiction,  and none of
Holdco,  the Borrower or any of the Borrower's  Subsidiaries has signed any such
financing statement or filing or any security agreement  authorizing any secured
party  thereunder  to file any such  financing  statement  or filing.  As of the
Agreement  Date,  except as set forth on Schedule  5.1(h),  none of Holdco,  the
Borrower or any of the Borrower's



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<PAGE>



Subsidiaries  is a party to any contract,  instrument  or agreement  (including,
without limitation, any of the Necessary Authorizations) restricting the ability
of Holdco,  the Borrower or such  Subsidiary,  as  applicable,  to enter into an
agreement by which  Holdco,  the  Borrower or such  Subsidiary,  as  applicable,
agrees that it shall not create, assume, incur or permit to exist or be created,
directly  or  indirectly,  any Lien on its  Assets.  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 the Capital
Stock of the Borrower.

         (i)  Litigation.  As of the  Agreement  Date,  except  as set  forth on
Schedule  5.1(i)  attached  hereto,  there  is  no  action,  suit,  application,
complaint,  petition,  revocation,  proceeding  or  investigation,  at law or in
equity, or any order, decree or judgment,  in effect or pending against,  or, to
the best of the Borrower's knowledge, threatened against Holdco, the Borrower or
any of the Borrower's  Subsidiaries  or any of their  respective  properties and
Assets (including,  without limitation, any Necessary Authorization or any Tower
Assets)  in any court or before any  arbitrator  of any kind or before or by any
governmental body (including,  without  limitation,  the FCC and/or the FAA). No
such action,  suit,  proceeding  or  investigation,  and no such  action,  suit,
proceeding or  investigation  arising after the Agreement  Date,  (i) calls into
question the validity of this Agreement or any of the other Loan Documents, (ii)
if  determined  adversely  to  Holdco,  the  Borrower  or any of the  Borrower's
Subsidiaries,  could reasonably be expected to have a Materially Adverse Effect,
or (iii) which could restrict in any material manner the ownership, operation or
license status of any Material Towers.

         (j) Taxes. All federal and material state,  local and other tax returns
(including  information  returns)  of  Holdco,  the  Borrower  and  each  of the
Borrower's Subsidiaries required by law to be filed have been duly filed and all
federal and material state,  local and other taxes and  impositions,  including,
without  limitation,  withholding  taxes,  assessments  and  other  governmental
charges or levies  required  to be paid by Holdco,  the  Borrower  or any of the
Borrower's  Subsidiaries  or imposed  upon  Holdco,  the  Borrower or any of the
Borrower's  Subsidiaries or any of their respective properties,  income, profits
or Assets, which are due and payable,  have been paid, except any such taxes (i)
the payment of which Holdco, the Borrower or any of the Borrower's  Subsidiaries
is diligently  contesting  in good faith by  appropriate  proceedings,  (ii) for
which adequate reserves have been provided on the books of Holdco,  the Borrower
or the  applicable  Subsidiary of the  Borrower,  and (iii) as to which no Lien,
other than a Permitted Lien, has attached and no foreclosure, distraint, sale or
similar proceedings have been commenced.  The charges,  accruals and reserves on
the books of Holdco,  the Borrower and each of the  Borrower's  Subsidiaries  in
respect of any taxes or other governmental charges are adequate.

         (k) Financial  Information.  The Borrower has furnished or caused to be
furnished to the Credit Parties audited financial statements for the Borrower on
a consolidated basis with its Subsidiaries which are complete and correct in all
material respects and present fairly in all material respects in accordance with
GAAP the financial  position of the Borrower and its  Subsidiaries  on and as at
December  31, 1998 and the results of  operations  for the period then ended and
unaudited  financial  statements  for the  Borrower  and its  Subsidiaries  on a
consolidated  basis for the  month  ended  February  28,  1999  (the  "Financial
Statements").  As of the Agreement Date, none of Holdco,  the Borrower or any of
the  Borrower's  Subsidiaries  has  any  material  liabilities,   contingent  or
otherwise,  other than (i) as disclosed in the financial  statements referred to
in the preceding  sentence,  (ii) as set forth or referred to in this Agreement,
(iii) those which have been  incurred in the ordinary  course of business  since
February 28, 1999, or (iv) those permitted pursuant to Section 8.1 and there are
no material  unrealized losses of Holdco,  the Borrower or any of the Borrower's
Subsidiaries and no anticipated losses of Holdco, the


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Borrower or any of the Borrower's Subsidiaries other than those set forth in the
Projections  which have been disclosed in writing to the Credit Parties prior to
the  Agreement  Date and  identified  as such.  The  Projections  represent  the
Borrower's  reasonable  estimate  of  projected  future  operations  as  of  the
Agreement  Date,  and as of the Agreement  Date,  to the best of the  Borrower's
knowledge,  there exist no facts or  circumstances  which the Borrower  believes
could  be  reasonably  likely  to  cause  a  materially  adverse  change  in the
Projections.

         (l) No Adverse Change.  Since December 31, 1998,  there has occurred no
event which has had or which could  reasonably  be expected to have a Materially
Adverse Effect.

         (m) ERISA. Each Plan maintained,  or contributed to, by the Borrower or
any of its Subsidiaries, or any of their ERISA Affiliates, is listed on Schedule
5.1(m)  attached  hereto.  Each of such Plans is in  compliance  in all material
respects with their terms, ERISA and the Code. None of such Plans has a material
"accumulated  funding  deficiency"  within  the  meaning  of ERISA or the  Code.
Neither the Borrower  nor any of its  Subsidiaries  nor any of their  respective
ERISA Affiliates has incurred any material liability to the PBGC (other than the
payment of premiums  imposed by Title IV of ERISA) in  connection  with any such
Plan.  The  assets of each such Plan  which is  subject to Title IV of ERISA are
sufficient to provide the benefits under such Plan if such Plan were  terminated
on the date hereof.  No  Reportable  Event has occurred with respect to any such
Plan. No party in interest, fiduciary, trustee or administrator of any such Plan
or trust created  thereunder has engaged in a "prohibited  transaction" (as such
term is defined in Section 406 of ERISA or Section 4975 of the Code) which would
subject  the  Borrower,  its  Subsidiaries  or any  of  their  respective  ERISA
Affiliates  to a material tax on  "prohibited  transactions"  imposed by Section
4975 of the Internal Revenue Code. No party in interest,  fiduciary,  trustee or
administrator  of any such Plan or trust  created  thereunder  has  committed  a
material breach of its fiduciary duty or knowingly participated in any violation
of ERISA which would subject the  Borrower,  its  Subsidiaries,  or any of their
respective ERISA Affiliates to a material penalty under Section 502 of ERISA. As
of the Agreement  Date, none of the Borrower,  its  Subsidiaries or any of their
respective  ERISA  Affiliates is a participant in or obliged to make any payment
to a  Multiemployer  Plan.  As of the  Agreement  Date,  except as  required  by
Sections  601  through  609  of  ERISA,  neither  the  Borrower  nor  any of its
Subsidiaries has made any oral or written commitments to provide post-employment
health  or life  insurance  coverage  with  respect  to any  former  or  current
employee.  The Borrower and its  Subsidiaries and ERISA Affiliates have properly
classified  individuals  providing  services  to  the  Borrower  or  any  of its
Subsidiaries or ERISA  Affiliates as employees or  non-employees,  except to the
extent that a misclassification would not result in a Materially Adverse Effect.

         (n) Compliance  with  Regulations U and X. Neither the Borrower nor any
of its  Subsidiaries  is engaged  principally in, or has as one of its important
activities,  the business of purchasing or carrying, or extending credit for the
purpose of  purchasing  or  carrying,  any margin  stock  within the  meaning of
Regulations U and X of the Board of Governors of the Federal Reserve System.

         (o) Investment Company Act; Public Utility Holding Company Act. None of
Holdco,  the  Borrower  or any of the  Borrower's  Subsidiaries  is  required to
register under the provisions of the Investment Company Act of 1940, as amended,
and neither the entering into or  performance  by the Borrower of this Agreement
nor the issuance of the Notes violates any provision of such Act or requires any
consent,  approval or authorization of, or registration with, the Securities and
Exchange  Commission  or any  other  governmental  or public  body or  authority
pursuant to any  provisions of such Act. None of Holdco,  the Borrower or any of
the Borrower's  Subsidiaries is a "public  utility  holding  company" within the
meaning of the Public Utility Holding Company Act of 1935, as amended.


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         (p)  Securities  Laws.  Holdco,  the Borrower,  each of the  Borrower's
Subsidiaries  and,  to the  best  knowledge  of  Holdco,  the  Borrower  and the
Borrower's  Subsidiaries,  any underwriters,  sales agents,  representatives  or
brokers  representing or acting on behalf of Holdco,  the Borrower or any of the
Borrower's  Subsidiaries,  have  complied  in all  material  respects  with  all
material federal and state securities laws in connection with the offer and sale
of stock  or other  equity  interests  in  Holdco,  the  Borrower  or any of the
Borrower's Subsidiaries.

         (q)  Intellectual  Property.  The Borrower and each of its Subsidiaries
owns  or  possesses  the  valid  right  to  use  all  material  patents,  patent
applications,  patent and know-how licenses,  inventions,  technology,  permits,
trademark  registrations  and  applications,   product  designs,   applications,
processes,  trademarks,  service marks, trade names, copyrights and licenses and
rights in  respect  of the  foregoing,  set forth on  Schedule  5.1(q)  attached
hereto,  which are used or  necessary  for the  conduct of its  business  as now
conducted or hereafter proposed to be conducted, without any known conflict with
the  rights of others  and free and clear of any  Liens,  other  than  Permitted
Liens.  All such  licenses  and  rights  with  respect to  patents,  trademarks,
trademark rights,  trade names, trade name rights,  service marks and copyrights
are in full force and effect in all  material  respects,  and are not subject to
any pending or, to the best  knowledge  of the  Borrower,  threatened  attack or
revocation.

         (r) Accuracy and Completeness of Information. All information, reports,
prospectuses  and other papers and data relating to Holdco,  the Borrower or any
of the Borrower's  Subsidiaries (other than the Projections which are covered by
item (k) above) furnished in writing by or on behalf of Holdco,  the Borrower or
any of the Borrower's  Subsidiaries to any of the Credit Parties (as any of such
items have been modified) were, at the time  furnished,  complete and correct in
all material  respects to the extent  necessary to give the Credit  Parties true
and accurate  knowledge of the subject matter. No fact or situation is currently
known to the Borrower  which has had or could  reasonably  be expected to have a
Materially Adverse Effect.

         (s) Agreements  with  Affiliates and Management  Agreements.  As of the
Agreement Date, except as set forth on Schedule 5.1(s) attached hereto,  none of
Holdco, the Borrower nor any of the Borrower's Subsidiaries has (i) any material
written  agreements  or binding  arrangements  of any kind with any Affiliate or
(ii) any material  management or consulting  agreements of any kind, not entered
into in the ordinary course of business.

         (t)  Environmental  Matters.  Except as is described on Schedule 5.1(t)
attached hereto,  and, with respect to the Nextel  Collateral to the best of the
Borrower's knowledge:

                  (i)  Each  Property  does  not  contain,   in,  on  or  under,
including,  without limitation,  the soil and groundwater thereon or thereunder,
any  Hazardous  Materials  except (A) in such  quantities  as  required  for the
conduct in the ordinary course of the Borrower's business or, to the best of the
Borrower's knowledge,  the business of the fee owner of such Property,  and then
only in  compliance  with  applicable  Environmental  Laws, or (B) in amounts or
circumstances  that do not give rise to material  liability under  Environmental
Laws.

                  (ii) The Borrower and its  Subsidiaries are in compliance with
all  applicable  Environmental  Laws,  and  there is no  condition  which  could
interfere  with the continued  operation of any of the  Properties in compliance
with  Environmental  Laws or impair the  financial  condition  of the  Borrower,
except  such  non-compliance  as could  not  reasonably  be  expected  to have a
Materially Adverse Effect.

                  (iii)  Neither the  Borrower nor any of its  Subsidiaries  has
received  from any  Governmental  Authority  or any  other  Person  any  written
complaint, notice of violation, alleged

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<PAGE>



violation,  investigation  or advisory  action or notice of potential  liability
regarding  matters  of  environmental  protection  or  permit  compliance  under
applicable  Environmental  Laws with regard to the  Properties,  and neither the
Borrower nor any of its Subsidiaries is aware that any Governmental Authority is
contemplating  delivering  to the Borrower or any of its  Subsidiaries  any such
notice,  except in each case, where such complaint or notice has been revoked or
could not reasonably be expected to result in material liability to the Borrower
or its Subsidiaries. There is no condition or circumstance currently or with the
passage of time that could  reasonably  be  expected to present the basis of any
such  notice.  There  has  been no  pending  or,  to the  Borrower's  knowledge,
threatened complaint, notice of violation,  alleged violation,  investigation or
notice of potential liability under Environmental Laws with regard to any of the
Properties, except in each case, where such complaint or notice has been revoked
or could not  reasonably  be  expected to result in  material  liability  to the
Borrower or its Subsidiaries.

                  (iv)  Hazardous  Materials have not been  generated,  treated,
stored,  disposed of, at, on or under any of the Property in material  violation
of Environmental Laws, or in a manner that could give rise to material liability
under  Environmental  Laws nor have any Hazardous  Materials been transported or
disposed  of from  any of the  Properties  to any  other  location  in  material
violation  of  Environmental  Laws  nor in a manner  that  could  reasonably  be
anticipated to give rise to material liability under Environmental Laws.

                  (v)  Neither the  Borrower  nor any of its  Subsidiaries  is a
party to any governmental administrative actions or judicial proceedings pending
under any Environmental Law with respect to any of the Properties, nor are there
any consent decrees or other decrees,  consent orders,  administrative orders or
other orders, or other administrative or judicial requirements outstanding under
any  Environmental  Law with  respect to any of the  Properties,  except in each
case,  where such matters could not reasonably be expected to result in material
liability to the Borrower or its Subsidiaries.

                  (vi) There has been no release of Hazardous Materials into the
environment at or from any of the Properties, or arising from or relating to the
operations of the Borrower or any of its Subsidiaries,  in material violation of
Environmental  Laws or in amounts  that could  give rise to  material  liability
under Environmental Laws.

         (u)  Payment of Wages;  Labor  Matters.  The  Borrower  and each of its
Subsidiaries are in compliance with the Fair Labor Standards Act, as amended, in
all  material  respects,  and the  Borrower  and each of its  Subsidiaries  have
complied  in  all  material   respects   with  all  minimum  and  overtime  wage
requirements applicable to their respective employees. As of the Agreement Date,
except as  disclosed  on  Schedule  5.1(u):  (i) no labor  contract to which the
Borrower  or any of its  Subsidiaries  is a party  or is  otherwise  subject  is
scheduled to expire during the term of this Agreement; (ii) neither the Borrower
nor any of its  Subsidiaries  has,  within the two (2) year  period  immediately
preceding the Agreement Date,  taken any action which would have  constituted or
resulted in a "plant closing" or "mass layoff" within the meaning of the Federal
Worker  Adjustment  and  Retraining  Notification  Act of  1988  or any  similar
applicable  federal,  state or local  law,  and the  Borrower  does not have any
reasonable  expectation that it will incur any material liability under such Act
at any time during the term of this  Agreement;  (iii) all of the  operations of
the  Borrower and its  Subsidiaries  are  conducted in all material  respects in
compliance  with  all  applicable  rules  and  regulations  promulgated  by  the
Occupational Safety and Health Administration of the United States Department of
Labor;  and (iv) as of the Agreement  Date,  (A) neither the Borrower nor any of
its  Subsidiaries  is a party to any  material  labor  dispute  (other  than any
immaterial  disputes  with the  Borrower's  or such  Subsidiary's  employees  as
individuals and not affecting the Borrower's or such Subsidiary's relations with
any labor group or its workforce as a whole) and (B) there are no pending or, to
the Borrower's knowledge,

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<PAGE>



threatened  strikes or  walkouts  relating to any labor  contracts  to which the
Borrower or any of its  Subsidiaries is a party or is otherwise  subject.  As of
the  Agreement  Date,  none  of  the  employees  of the  Borrower  or any of its
Subsidiaries is a party to any collective bargaining agreement with the Borrower
or any of its Subsidiaries.

         (v) Priority.  The Security Interest is (i) a valid and perfected first
priority (except for Permitted Liens) security interest in all of the Collateral
in favor of the Collateral  Agent, for the benefit of the Senior Credit Parties,
securing,  in  accordance  with  the  terms  of  the  Security  Documents,   the
outstanding  Senior  Obligations,  (ii) a valid and  perfected  second  priority
(except for Permitted Liens) security interest in the Nextel Collateral in favor
of the Collateral Agent, for the benefit of the Tranche C Lenders,  securing, in
accordance with the terms of the Security  Documents and to the extent set forth
in Section 2.15 hereof, the outstanding Tranche C Obligations, and (iii) a valid
and  perfected  first  priority  security  interest in the Tranche C  Pre-Funded
Interest  Account  in favor of the  Collateral  Agent,  for the  benefit  of the
Tranche C  Lenders,  securing,  in  accordance  with the  terms of the  Security
Documents  and to the extent set forth in Section 2.15 hereof,  the  outstanding
Tranche C  Obligations.  Neither the  Collateral  nor the  Tranche C  Pre-Funded
Interest  Account is subject to any Liens other than Permitted  Liens. The Liens
created  by  the  Security   Documents  are  enforceable  as  security  for  the
outstanding  Obligations  in  accordance  with their  terms with  respect to the
Collateral  and the Tranche C Pre-Funded  Interest  Account except to the extent
that enforcement thereof may be limited by bankruptcy, insolvency,  liquidation,
reorganization,  reconstruction and other similar laws affecting  enforcement of
creditors'  rights generally  (insofar as any such law relates to any Insolvency
Proceeding of Holdco, the Borrower or such Subsidiary, as applicable) and to the
application of general equitable principles.

         (w) Indebtedness.  Except as permitted  pursuant to Section 8.1 hereof,
none  of  Holdco,  the  Borrower  or  any  of the  Borrower's  Subsidiaries  has
outstanding,  as of the Agreement  Date,  and after giving effect to the initial
Advance of the Loans hereunder on the Agreement Date, any Indebtedness.

         (x) Investments. As of the Agreement Date, none of Holdco, the Borrower
or any of the  Borrower's  Subsidiaries  owns  any  Capital  Stock,  partnership
interests or other  securities  of, or equity  interests in, or has  outstanding
loans or advances to, or guaranties of the  obligations of, any Person except as
reflected  in the  Financial  Statements,  or  disclosed  on Schedule  5.1(c) or
Schedule 5.1(x) attached hereto.

         (y) Material Contracts. Schedule 5.1(y) contains a complete list, as of
the date of this  Agreement,  of each  contract,  agreement or  commitment  (the
"Material  Contracts")  to which the  Borrower or any of its  Subsidiaries  is a
party  which is  material  to its  business,  financial  condition,  operations,
prospects  or  Assets,  other  than any  Necessary  Authorizations  set forth on
Schedule 5.1(f)  attached  hereto,  and, upon the request of the Arrangers,  the
Borrower  will  provide  the  Arrangers  with a copy  of any  such  contract  or
agreement.  Schedule  5.1(y)  further  identifies  each Material  Contract which
requires  consent to the granting of a Lien in favor of the Collateral  Agent on
the rights of the Borrower or any of its Subsidiaries thereunder.

         (z)  Broker's or Finder's  Commissions.  No broker's or finder's fee or
commission  will be payable with  respect to the  issuance of the Notes,  and no
other similar fees or commissions will be payable by Holdco, the Borrower or any
of the Borrower's  Subsidiaries  for any other services  rendered to any of them
ancillary to the transactions  contemplated herein except to the Arrangers,  the
Tranche C Lenders and their respective Affiliates.



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         (aa) Nextel Acquisition Documents;  Indentures;  Equity Documents.  The
Borrower has provided to the  Arrangers  (i) correct and complete  copies of the
Nextel  Acquisition  Documents,  (ii) a correct and complete copy of each of the
Indentures  and the  notes and  other  agreements  and  documents  executed  and
delivered pursuant thereto,  and (iii) correct and complete copies of the Holdco
Equity  Documents.  To  the  best  of  the  Borrower's  knowledge,  none  of the
representations  and  warranties  made by or with respect to any of Holdco,  the
Borrower and the Borrower's  Subsidiaries as set forth in the Nextel Acquisition
Documents or the Holdco Equity Documents is incorrect in any material respect.

         (bb) Solvency.  As of the Agreement Date and after giving effect to the
Nextel  Acquisition,  the Tower Sub Merger and the transactions  contemplated by
this Agreement and the other Loan  Documents,  (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. For purposes of this
Section  5.1(bb),  "debt" means any liability on a claim,  and "claim" means (i)
the  right to  payment,  whether  or not  such  right is  reduced  to  judgment,
liquidated,  unliquidated,  fixed, contingent,  matured, unmatured,  undisputed,
legal, equitable, secured or unsecured, or (ii) the right to an equitable remedy
for breach of  performance  if such  breach  gives  rise to a right to  payment,
whether or not such right to an equitable remedy is reduced to judgment,  fixed,
contingent, matured, unmatured, undisputed, secured or unsecured.

         (cc) Real Property and Tower Sites.  Schedule  5.1(cc) sets forth as of
the Agreement  Date,  with respect to at least ninety percent (90%) of the Tower
Sites  owned or leased  by the  Borrower  and its  Subsidiaries,  the  following
information  with  respect to such Tower  Sites:  (i) the location of such Tower
Sites, (ii) the dates of final termination or expiration of all Tower Site Lease
Agreements  and Tower Space Lease  Agreements  applicable  to such Tower  Sites,
(iii)  current  anchor  tenants and  Co-Locators,  and capacity  for  additional
tenants,  on such Tower Sites,  and (iv) with respect to any leased Tower Sites,
whether  the consent of the  landlord  of such Tower  Sites is  required  for an
assignment of the Tower Site Lease Agreement with respect  thereto.  To the best
of the Borrower's knowledge,  each of the material leases of the Borrower or its
Subsidiaries  is valid,  enforceable  and in full force and effect,  and has not
been modified or amended, except as otherwise set forth in Schedule 5.1(cc). The
Borrower or a Subsidiary of the Borrower,  as applicable,  is the sole holder of
the lessee's interests under each lease to which it is a party and has the right
to pledge and assign the same except as qualified in Schedule  5.1(cc).  Neither
the Borrower nor any of its  Subsidiaries  has made any pledge or  assignment of
any of its  rights  under  any  such  leases  except  pursuant  to the  Security
Documents and except for the Nextel  Subordinated  Lien, and there is no default
or condition which,  with the passage of time or the giving of notice,  or both,
would  constitute  a material  default on the part of the Borrower or any of its
Subsidiaries or, to the best of the Borrower's knowledge, any other party, under
such leases with respect to any Material Towers. Neither the Borrower nor any of
its Subsidiaries owns or holds, or is obligated under or a party to, any option,
right of first  refusal or any other  contractual  right to  purchase,  acquire,
sell,  assign or dispose of any real property owned or leased by it with respect
to any Material Towers.

         (dd)  Year  2000  Problem.  The  Borrower  and  its  Subsidiaries  have
conducted a thorough  assessment of their respective computer systems and do not
believe  they have a  material  "year  2000  problem"  (that  is,  the risk that
computer  applications  may  not be  able  to  properly  perform  date-sensitive
functions after December 31, 1999).

         Section 5.2       Survival of Representations and Warranties, etc.  All
representations and warranties made under this Agreement and the other Loan
Documents shall be deemed to be

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<PAGE>



made, and shall be true and correct,  at and as of the Agreement Date and on the
date of each  Advance  and on the date of  issuance  of each  Letter of  Credit,
except to the extent expressly  applicable only to an earlier date or previously
fulfilled  in  accordance  with  the  terms  hereof.  All   representations  and
warranties  made under this Agreement  shall survive,  and not be waived by, the
execution  hereof by the Credit  Parties,  any  investigation  or inquiry by any
Credit  Party,  or the making of any  Advance or the  issuance  of any Letter of
Credit under this Agreement.


                                    ARTICLE 6

                                General Covenants

         So long as any of the Obligations  are  outstanding and unpaid,  or the
Borrower shall have the right to borrow hereunder (whether or not the conditions
to borrowing have been or can be fulfilled), and unless the Majority Lenders, or
such  greater  number of  Lenders as may be  expressly  provided  herein,  shall
otherwise consent in writing:

         Section 6.1       Preservation of Existence and Similar Matters.  (a)
Except as provided in Section 6.1(b),  each of Holdco and the Borrower will, and
will cause each of the Borrower's Subsidiaries to:

                  (i) preserve and maintain its existence,  rights,  franchises,
         licenses  and  privileges  in  the  state  of  its   incorporation   or
         organization  and in each other  state in which it  operates a material
         part of its  business,  including,  without  limitation,  all Necessary
         Authorizations  material,  in each case to the extent of its  business;
         and

                  (ii)  qualify  and  remain  qualified  and  authorized  to  do
         business in each  jurisdiction in which the character of its properties
         or the nature of its business makes such qualification or authorization
         prudent  except where the failure to be qualified or  authorized  would
         not have a Materially Adverse Effect.

         (b) On or before March 31, 2000, the Borrower shall cause Merger Sub to
be merged with and into the Borrower.

         Section 6.2  Business;  Compliance  with  Applicable  Law. 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 the Borrower. Each of Holdco and the Borrower will, and will cause each
of the  Borrower's  Subsidiaries  to,  comply in all material  respects with the
requirements of all Applicable Laws (including,  without  limitation,  all tower
marking and lighting requirements of the FAA and the FCC).

         Section 6.3  Maintenance of Properties  and Assets.  The Borrower will,
and  will  cause  each of its  Subsidiaries  to,  (a)  maintain  or  cause to be
maintained in the ordinary course of business in good repair,  working order and
condition (reasonable wear and tear excepted) all properties (including, without
limitation,  all Towers) used in their respective  businesses  (whether owned or
held under lease), and from time to time make or cause to be made all needed and
appropriate  repairs,  renewals,   replacements,   additions,   betterments  and
improvements thereto, and (b) obtain and maintain and preserve in full force and
effect,  and renew and  extend as  necessary,  all  Material  Contracts  and all
Necessary  Authorizations with respect to the Towers except, in each case, where
such failure would not affect or apply to any Material Towers.



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         Section 6.4 Accounting Methods and Financial Records. The Borrower will
maintain, on a consolidated basis with its Subsidiaries,  a system of accounting
established and administered in accordance with GAAP consistently  applied, keep
adequate  records and books of account in which complete entries will be made in
accordance with such accounting  principles  consistently applied and reflecting
all  transactions  required to be reflected by such accounting  principles,  and
keep  accurate  and  complete  records  of the  Collateral  and  the  Tranche  C
Pre-Funded  Interest Account.  The Borrower and its Subsidiaries will maintain a
fiscal year ending on December 31.

         Section 6.5       Insurance.  Each of Holdco and the Borrower will, and
will cause each of the Borrower's Subsidiaries to:

         (a) Maintain insurance, including, but not limited to, public liability
coverage insurance,  from responsible companies in such amounts and against such
risks to Holdco,  the Borrower  and each of the  Borrower's  Subsidiaries  as is
prudent and customary for Persons in the Tower Operations  business  (including,
without limitation, larceny, embezzlement, employee fidelity, and other criminal
misappropriation  insurance and insurance  against claims for personal or bodily
injury, death or property damage);

         (b) Keep  their  respective  Assets  insured by  responsible  companies
against loss or damage by fire,  theft,  burglary,  pilferage,  loss in transit,
explosions  and hazards  insured  against by extended  coverage,  in amounts and
scope of  coverage  which are  prudent  for the  wireless  communications  tower
industry, in accordance with industry standards, all premiums thereon to be paid
by Holdco, the Borrower and the Borrower's Subsidiaries;

         (c) Require that each casualty and liability  insurance  policy for the
Borrower  and its  Subsidiaries  provide  for at least  thirty  (30) days' prior
written  notice  to the  Collateral  Agent  of any  termination  of or  proposed
cancellation or non-renewal of such policy,  or material  reduction in coverage,
and name the Collateral Agent (for the benefit of the Senior Credit Parties and,
in the case of Tower Sub, the Credit Parties) as additional  named loss payee to
the extent of the Obligations and additional named insured;

         (d) From and after the Revolving  Loan  Availability  Date,  subject to
Section 4.2 hereof,  in the event of a casualty covered by the Borrower's or any
of its  Subsidiaries'  insurance  maintained  pursuant to this  Section 6.5, the
Borrower  will be entitled,  to the extent  otherwise  permitted  hereunder,  to
borrow a Base Rate  Advance  in an amount  necessary  to  replace  or repair the
damages  caused by such  casualty.  Net Proceeds of  $1,000,000 or less shall be
paid  directly  to,  and may be  retained  by, the  Borrower.  Net  Proceeds  of
insurance  in excess of  $1,000,000  shall be paid to the  Collateral  Agent and
shall (i) be applied to repay the Advance made to the  Borrower  pursuant to the
immediately  preceding  sentence as set forth in Section  2.7(b) or Section 10.4
hereof,  as  appropriate,  and (ii) thereafter be applied as provided in Section
2.7(b).  Prior to the Revolving Loan Availability Date, so long as no Default or
Event of  Default  then  exists,  in the  event  of a  casualty  covered  by the
Borrower's or any of its  Subsidiaries'  insurance  maintained  pursuant to this
Section 6.5, the Borrower  will be entitled to retain up to  $25,000,000  in Net
Proceeds of the  insurance,  and the remaining Net Proceeds shall be paid to the
Collateral  Agent  as a  prepayment  of  the  Term  Loans  pursuant  to  Section
2.5(b)(ii) hereof.

         Section  6.6  Payment  of Taxes  and  Claims.  Each of  Holdco  and the
Borrower will, and will cause each of the  Borrower's  Subsidiaries  to, pay and
discharge all material taxes, including, without limitation,  withholding taxes,
assessments  and  governmental  charges or levies required to be paid by them or
imposed upon them or their income or profits or upon any properties belonging to
them, prior to the date on which penalties attach thereto, and all lawful claims
for


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labor,  materials and supplies which,  if unpaid,  might become a Lien or charge
upon any of their properties; except that no such tax, assessment,  charge, levy
or claim  need be paid  which is being  diligently  contested  in good  faith by
appropriate  proceedings  and for which  adequate  reserves  shall have been set
aside  on the  appropriate  books,  but  only so long as such  tax,  assessment,
charge,  levy or claim does not become a Lien or charge  other than a  Permitted
Lien and no foreclosure,  distraint, sale or similar proceedings shall have been
commenced.  Each of Holdco  and the  Borrower  will,  and will cause each of the
Borrower's  Subsidiaries  to,  timely  file  all  material  information  returns
required by federal, state or local tax authorities.

         Section  6.7 Visits and  Inspections.  Each of Holdco and the  Borrower
will,   and  will  cause  each  of  the  Borrower's   Subsidiaries   to,  permit
representatives of any of the Credit Parties, during normal business hours, upon
reasonable  advance  notice to  Holdco,  the  Borrower  or such  Subsidiary,  as
applicable,  to (a) visit and inspect the properties of Holdco,  the Borrower or
such  Subsidiary,  (b)  inspect  and  make  extracts  from and  copies  of their
respective books and records,  and (c) discuss with their  respective  principal
officers their respective businesses, assets, liabilities,  financial positions,
results of operations and business  prospects.  Each of Holdco, the Borrower and
each of the Borrower's  Subsidiaries will also permit  representatives of either
of the  Arrangers to discuss with their  respective  auditors  their  respective
businesses, assets, liabilities,  financial positions, results of operations and
business prospects.

         Section  6.8  Payment  of  Indebtedness.   Subject  to  any  provisions
regarding  subordination herein or as set forth in any other Loan Document, each
of  Holdco  and the  Borrower  will,  and  will  cause  each  of the  Borrower's
Subsidiaries  to,  pay any  and  all of  their  respective  Indebtedness  in the
ordinary  course of  business,  other than amounts  diligently  disputed in good
faith and for which  adequate  reserves have been set aside in  accordance  with
GAAP.

         Section  6.9 Use of  Proceeds.  The  Borrower  will  use the  aggregate
proceeds of all Advances (a) to finance the Nextel Acquisition,  (ii) to provide
funding for the construction/development, build-out and Acquisition of Towers as
permitted  hereunder,  (c) for general corporate  purposes  (including,  without
limitation,  fees  and  expenses  relating  to the  Nextel  Acquisition  and the
transactions  contemplated by this Agreement and the other Loan Documents),  and
(d) for working capital and other general corporate purposes.  A portion of each
Advance  of the  Tranche  C Loans  in an  aggregate  amount  sufficient  to make
interest  payments on such Advance during the Tranche C Pre-Fund Period shall be
funded  on the date of such  Advance  of the  Tranche  C Loans to the  Tranche C
Pre-Funded  Interest  Account and made solely  available for payment of interest
charges on the Tranche C Loans,  and principal and interest  repayment  upon the
Final Maturity Date or in the event of acceleration of the Tranche C Obligations
pursuant to Section 10.3(b) hereof.  No proceeds of Advances  hereunder shall be
used for the purchase or carrying or the  extension of credit for the purpose of
purchasing or carrying any margin stock within the meaning of  Regulations U and
X of the Board of Governors of the Federal Reserve System.

         Section  6.10  Real  Property.  With  respect  to each  parcel  of real
property,  whether owned or leased by the Borrower or any of its Subsidiaries on
the Agreement Date or at any time thereafter (including, without limitation, any
Tower Site) to the extent  reasonably  requested by the  Collateral  Agent,  the
Borrower shall,  and shall cause each of its  Subsidiaries,  promptly  following
such request, to:

         (a) Execute and deliver to the Collateral Agent, a Mortgage (or, in the
case of real  property  acquired  (or  leased)  after  the  Agreement  Date,  an
amendment  to, or amendment  and  restatement  of, any Mortgage  delivered on or
before  the  Agreement  Date)  covering  such  parcel  of  real  property,   and
collaterally assign, to the extent permitted therein, any Tower Site Lease



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Agreements  and/or Tower Space Lease Agreements  entered into by the Borrower or
any of its Subsidiaries as lessor with respect to such real property,  in either
case to the extent  reasonably  requested  by the  Collateral  Agent;  provided,
however, the Borrower and its Subsidiaries shall not be required to grant to the
Collateral  Agent a Mortgage in respect of any parcel of real property  owned by
the United States government or any agency thereof.

                  Subject  to  Section  4.5(a)  hereof,  the  Borrower  and  its
Subsidiaries,  as applicable, shall cause a Mortgage with respect to each of the
Tower Sites  identified  on Schedule  6.10 to be executed  and  delivered to the
Collateral Agent. To the extent that any such Mortgage shall, for any reason, be
unrecordable, the Borrower and its Subsidiaries shall replace such Mortgage with
a recordable Mortgage covering any Tower Site owned or leased by the Borrower or
any of its  Subsidiaries  as of the Agreement  Date not listed on Schedule 6.10,
and  Schedule  6.10 shall then be deemed  automatically  amended to include such
Tower Site.

                  All of the  Mortgages  shall be  delivered by the Borrower and
its  Subsidiaries to the Collateral  Agent in recordable form for the applicable
jurisdiction,  and to the extent  that the  lessor's  consent is  required  with
respect to the grant of any  Mortgage  with respect to any parcel of leased real
property,  (i) the Borrower shall use its reasonable best efforts to obtain from
the applicable  lessor such consent in writing,  and (ii) the  Collateral  Agent
will not  require  execution  of such  Mortgage  unless  such  consent  is first
obtained.

                  With  respect  to the  Tower  Sites  owned  or  leased  by the
Borrower or any of its  Subsidiaries on the Agreement Date, the Collateral Agent
shall  have the right (but not the  obligation)  to file or record any or all of
the Mortgages  relating thereto in those  jurisdictions  (A) where the filing or
recording  fee is nominal and there is not any  substantial  intangibles  tax or
other tax,  cost or expense,  and (B) in which the failure to file or record the
Mortgage  within a  specified  period of time  shall  cause the  Mortgage  to be
ineffective.  With respect to all Tower Sites acquired by the Borrower or any of
its  Subsidiaries  after the Agreement Date, the Collateral Agent shall have the
right (but not the obligation) to file or record up to twenty-five percent (25%)
of the Mortgages relating thereto in those jurisdictions (A) where the filing or
recording  fee is nominal and there is not any  substantial  intangibles  tax or
other tax,  cost or expense,  and (B) in which the failure to file or record the
Mortgage  within a  specified  period of time  shall  cause the  Mortgage  to be
ineffective.

                  Notwithstanding the foregoing, upon the occurrence of an Event
of Default  occurring with respect to Article 9 or Section 10.1(b)  hereof,  the
Collateral Agent shall have the right to record all of the Mortgages (which were
not previously filed or recorded) in their appropriate jurisdictions,  and shall
have the right to require  the  Borrower  and its  Subsidiaries  to execute  and
deliver Mortgages with respect to all such additional properties of the Borrower
and its Subsidiaries as the Collateral Agent may require.

         (b) In  connection  with all  Mortgages  executed and  delivered by the
Borrower or any of its Subsidiaries hereunder, grant to the Collateral Agent and
its  designees  access to all other  documentation  reasonably  requested by the
Collateral  Agent (all of which shall be compiled  in one central  location)  in
connection with each such grant or assignment,  including,  without  limitation,
policies  of title  insurance,  copies of any Phase I or Phase II  environmental
audits,  flood zone  certificates,  financing  statements  and fixture  filings,
surveys and  appraisals,  in each case to the extent  available  to or otherwise
reasonably obtainable by the Borrower or its Subsidiaries.

         (c) The Borrower  shall also make  available to the  Collateral  Agent,
upon request  therefor,  at the central location  referred to in Section 6.10(b)
hereof, copies of all Tower Site


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Lease Agreements and Tower Space Lease  Agreements  entered into by the Borrower
or any of its  Subsidiaries,  and to the extent  that any consent is required to
the pledge or assignment  of any Tower Space Lease  Agreement by the Borrower or
any its  Subsidiaries to the Collateral  Agent as security for the  Obligations,
the  Borrower  shall use its  reasonable  best efforts to obtain such consent in
writing to the extent reasonably requested by the Collateral Agent.

         (d) The Collateral Agent will release its Mortgage on a Tower Site upon
receipt of written notice from the Borrower that the Tower Site Lease  Agreement
for such Tower Site has expired or been terminated.

         Section 6.11 Indemnity. Each of Holdco and the Borrower, for itself and
on  behalf  of each of its  Subsidiaries,  agrees,  jointly  and  severally,  to
indemnify and hold harmless each Indemnified  Party from and against any and all
claims,  liabilities,  losses, damages, actions,  reasonable attorneys' fees and
expenses  (as such fees and  expenses  are  incurred)  and demands by any party,
including the costs of  investigating  and  defending  such claims (a) resulting
from any breach or alleged  breach by Holdco,  the Borrower or any Subsidiary of
the Borrower of any  representation,  warranty,  or covenant  made  hereunder or
under any other Loan Document;  (b) arising out of or in connection with (i) the
Commitments,  the Loans or  otherwise  under  this  Agreement  or any other Loan
Document (including,  without limitation,  the taking of collateral security for
the  Obligations),  including the use of the proceeds of Loans  hereunder in any
fashion by the Borrower or any of its  Subsidiaries  or the performance of their
respective  obligations under the Loan Documents by Holdco,  the Borrower or any
of its  Subsidiaries,  (ii)  allegations  of  any  participation  by the  Credit
Parties,  or any of them,  in the affairs of Holdco,  the Borrower or any of the
Borrower's Subsidiaries, or allegations that any of them has any joint liability
with Holdco, the Borrower or any of the Borrower's  Subsidiaries for any reason,
or  (iii)  any  claims  against  the  Credit  Parties,  or any of  them,  by any
shareholder,  partner, or other investor in or lender to Holdco, the Borrower or
any Subsidiary of the Borrower, by any brokers or finders or investment advisers
or  investment  bankers  retained by Holdco,  the Borrower or by any other third
party,  arising  out of the  Commitments,  the  Loans or  otherwise  under  this
Agreement or any other Loan  Document;  or (c) in  connection  with taxes (other
than income  taxes),  fees,  and other charges  payable in  connection  with the
Loans, or the execution, delivery, recording, and enforcement of this Agreement,
the Security Documents  (including,  without  limitation,  any Mortgage whenever
filed or recorded),  the other Loan  Documents,  and any  amendments  thereto or
waivers  of  any  of  the   provisions   thereof;   unless  the  Person  seeking
indemnification  hereunder is  determined  in such case to have acted with gross
negligence  or  willful  misconduct,  in any  case  by a  final,  non-appealable
judicial order. The obligations of Holdco,  the Borrower and the Subsidiaries of
the Borrower under this Section 6.11 are in addition to, and shall not otherwise
limit,  any  liabilities  which  Holdco,  the Borrower or any  Subsidiary of the
Borrower  might  otherwise  have in  connection  with any  warranties or similar
obligations  of Holdco,  the Borrower or such  Subsidiary of the Borrower in any
other agreement or instrument or for any other reason.

         Section 6.12  Interest Rate  Hedging.  Within one hundred  eighty (180)
days from the Agreement  Date,  the Borrower shall have entered into one or more
Interest Hedge Agreements which fix or place a limit on the Borrower's  interest
obligations at interest rates reasonably  acceptable to the Administrative Agent
with  respect  to the Loans such that,  at all times  thereafter,  not less than
fifty  percent  (50%) of the  aggregate  amount of Funded  Debt of  Holdco,  the
Borrower and the  Borrower's  Subsidiaries  outstanding  shall be hedged or on a
fixed rate basis.  Each Interest  Hedge  Agreement  shall provide  interest rate
protection  for a period of the  lesser of (a) three (3) years  from the date of
such Interest Hedge  Agreement,  or (b) the period  remaining  until the Initial
Maturity  Date with respect to Interest  Rate Hedge  Agreements  entered into in
connection  with the  Revolving  Loans and the Tranche A Loans and the Tranche B
Maturity  Date with respect to Interest  Rate Hedge  Agreements  entered into in
connection with the Tranche B


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Loans.  All obligations of the Borrower to any Lender, or any Affiliate of any
Lender, pursuant to any Interest Hedge Agreement,  shall be deemed to be part of
the Senior Obligations.

         Section 6.13 Environmental  Matters.  The conduct of the Borrower's and
each of its Subsidiaries' business operations will not violate any Environmental
Laws (including, without limitation, any rules and regulations applicable to the
Borrower  and its  Subsidiaries  relating  to  radiated  power  density  maximum
permissible  exposure levels) in any material respect,  and neither the Borrower
nor any of its  Subsidiaries  will  use any  Hazardous  Materials  at any of its
places of business  except such materials as are incidental to the Borrower's or
such Subsidiary's normal course of business,  maintenance and repairs,  and then
only in material compliance with all applicable Environmental Laws. The Borrower
and each of its Subsidiaries shall have, maintain, apply for and/or timely renew
all material  permits  required for the Towers and other business  operations at
its places of business or  otherwise.  The Borrower  shall  promptly  notify the
Credit  Parties  in writing of (a) any and all  material  enforcement,  cleanup,
remedial,  removal,  or other  governmental  or regulatory  actions  instituted,
completed or threatened in writing pursuant to any applicable Environmental Law;
(b) the existence of any condition or circumstances  known to the Borrower;  and
(c) all claims made or threatened by any third party against the Borrower or any
of  its   Subsidiaries   relating  to  damages,   contribution,   cost  recovery
compensation,  loss or injury resulting from any Hazardous Materials,  which, in
any  case,   could   reasonably  be  expected  to  result  in  liability   under
Environmental  Laws in excess of $1,000,000  in the aggregate  during any twelve
month period  during the term of this  Agreement.  The Borrower  shall  promptly
notify the Credit Parties of any material  remedial action taken by the Borrower
or any of its Subsidiaries  pursuant to  Environmental  Laws with respect to the
Borrower's or such Subsidiary's Towers or other business operations.

         Section  6.14 ERISA.  The Borrower  shall,  and shall cause each of its
Subsidiaries  to, at all times make, or cause to be made,  prompt payment of all
material  contributions  required under the terms of their Plans and to meet the
minimum  funding  standards  set forth in ERISA with respect to such Plans.  The
Borrower shall maintain,  and shall cause each of its  Subsidiaries to maintain,
each of the Plans of Borrower and its  Subsidiaries in material  compliance with
their terms and applicable provisions of ERISA and the Code.

         Section 6.15 Further Assurances.  Holdco and the Borrower will promptly
cure,  or cause to be cured,  defects in the creation and issuance of any of the
Notes and the execution and delivery of the Loan Documents  (including,  without
limitation, this Agreement), resulting from any act or failure to act by Holdco,
the Borrower or any of the  Borrower's  Subsidiaries  or any employee or officer
thereof.  Holdco and the Borrower,  at their sole expense, will promptly execute
and deliver to the Credit Parties,  or cause to be executed and delivered to the
Credit  Parties,  all  such  other  and  further  documents,   agreements,   and
instruments in compliance with or accomplishment of the covenants and agreements
of Holdco,  the Borrower and the Borrower's  Subsidiaries  in the Loan Documents
(including,  without limitation, this Agreement), or to obtain any consents, all
as may be reasonably  necessary or appropriate in connection therewith as may be
reasonably requested.

         Section 6.16  Covenants  Regarding  Formation of  Subsidiaries  and the
Making of Investments  and  Acquisitions.  At the time of any Acquisition by the
Borrower or any of its  Subsidiaries,  or the formation of any new Subsidiary of
the Borrower or of any of its  Subsidiaries,  the Borrower  will, and will cause
its Subsidiaries,  as applicable, to in the case of the formation or Acquisition
of a new  Subsidiary,  (a)  provide  to the  Collateral  Agent  a duly  executed
supplement  to the  Subsidiary  Security  Agreement  for  such  new  Subsidiary,
together with appropriate UCC-1 financing statements, as well as a duly executed
supplement  to the  Subsidiary  Guaranty  for such new  Subsidiary,  which shall
constitute both Security Documents and Loan


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Documents for purposes of this Agreement, as well as a loan certificate for such
new Subsidiary, substantially in the form of Exhibit Z attached hereto, together
with appropriate  attachments thereto; (b) pledge to the Collateral Agent all of
the Capital Stock (or other instruments or securities  evidencing  ownership) of
such Subsidiary or Person which is acquired or formed, beneficially owned by the
Borrower  or  any  of the  Borrower's  Subsidiaries,  as the  case  may  be,  as
additional  Collateral  for the Senior  Obligations to be held by the Collateral
Agent in  accordance  with the terms of the  Borrower  Pledge  Agreement  or the
Subsidiary Pledge Agreement, and execute and deliver to the Collateral Agent all
such documentation for such pledge (including,  without limitation, a supplement
to the  Subsidiary  Pledge  Agreement,  original  stock  certificates  and  duly
executed stock powers) as, in the reasonable opinion of the Collateral Agent, is
appropriate;  and  (c)  provide  all  other  documentation,  including,  without
limitation,  a Trademark  Security  Agreement  or any other  security  agreement
covering any additional  intellectual  property obtained by the Borrower or such
Subsidiary,  and one or more opinions of counsel  satisfactory to the Collateral
Agent which in the  reasonable  opinion of the  Collateral  Agent is appropriate
with  respect  to such  Acquisition  or the  formation  of such new  Subsidiary.
Investments made by the Borrower or any of its Subsidiaries  after the Agreement
Date shall also be treated as additional  Collateral and shall be subject to the
provisions  of  appropriate  Security  Documents.  Any  document,  agreement  or
instrument  executed or issued  pursuant to this  Section  6.16 shall be a "Loan
Document" for purposes of this Agreement.


                                    ARTICLE 7

                              Information Covenants

         So long as any of the  Obligations  is  outstanding  and  unpaid or the
Borrower  has a right to borrow  hereunder  (whether  or not the  conditions  to
borrowing have been or can be fulfilled),  and unless the Majority  Lenders,  or
such  greater  number of  Lenders as may be  expressly  provided  herein,  shall
otherwise consent in writing, the Borrower will furnish or cause to be furnished
to, in the case of Sections 7.1, 7.2, 7.3 and 7.4, each Credit Party, and in the
case of Sections 7.5 and 7.6, each Arranger, at its offices:

         Section 7.1  Monthly  Financial  Statements  and  Information  . Within
thirty (30) days after the last day of each  calendar  month  statements of cash
flows and operations of Holdco and the Borrower,  on a  consolidated  basis with
the Borrower's  Subsidiaries,  for such month and for the elapsed portion of the
year ended with the last day of such month, which shall set forth in comparative
form such  figures as at the end of and for such month and,  against the figures
set forth for such month in the Borrower's  business plan provided to the Credit
Parties  pursuant to Section 7.5(d) hereof,  and shall be certified by the chief
financial  officer of the Borrower,  to be, in his or her opinion,  complete and
correct in all material respects and to present fairly in all material respects,
in accordance with GAAP, the financial position of Holdco and the Borrower, on a
consolidated  basis  with  the  Borrower's  Subsidiaries,  as at the end of such
period and the  results  of  operations  for such  period,  and for the  elapsed
portion  of the year  ended with the last day of such  period,  subject  only to
normal year-end adjustments.

         Section 7.2 Quarterly  Financial  Statements  and  Information.  Within
forty-five  (45) days  after the last day of each of the first  three (3) fiscal
quarters,  and within  ninety (90) days after the last day of the fourth  fiscal
quarter of each fiscal year of the Borrower,  unaudited balance sheets of Holdco
and the Borrower, on a consolidated basis with the Borrower's  Subsidiaries,  as
at the end of such quarter and as of the end of the preceding  fiscal year,  and
the related statements of operations and the related statements of cash flows of
Holdco  and  the  Borrower,   on  a  consolidated   basis  with  the  Borrower's
Subsidiaries, for such quarter and for the


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elapsed portion of the year ended with the last day of such quarter, which shall
set forth in comparative form such figures as at the end of and for such quarter
and,  following the first  anniversary of the Agreement Date, the  corresponding
quarter  during the  preceding  fiscal year and shall be  certified by the chief
financial  officer of the Borrower,  to be, in his or her opinion,  complete and
correct in all material respects and to present fairly in all material respects,
in accordance with GAAP, the financial position of Holdco and the Borrower, on a
consolidated  basis  with  the  Borrower's  Subsidiaries,  as at the end of such
period and the  results  of  operations  for such  period,  and for the  elapsed
portion  of the year  ended with the last day of such  period,  subject  only to
normal year-end adjustments.

         Section 7.3 Annual Financial Statements and Information. In addition to
the quarterly  financial  statements and information to be provided  pursuant to
Section 7.2 with respect to the fourth fiscal  quarter of the  Borrower,  within
ninety (90) days after the end of each fiscal year of the Borrower,  the audited
balance  sheet of Holdco  and the  Borrower,  on a  consolidated  basis with the
Borrower's  Subsidiaries,  as at the end of such  fiscal  year  and the  related
audited  statement  of income  and  retained  earnings  or deficit  and  related
statements of cash flows of Holdco and the  Borrower,  on a  consolidated  basis
with  the  Borrower's  Subsidiaries,  for such  fiscal  year,  setting  forth in
comparative  form the figures as at the end of and for the previous  fiscal year
and  certified,   without  any  qualifications  or  explanatory  paragraphs,  by
independent certified public accountants of national recognized standing,  whose
opinion  shall  be  in  scope  and  substance  reasonably  satisfactory  to  the
Arrangers, and include a statement signed by such accountants to the effect that
in connection  with their  examination  of such financial  statements  they have
reviewed the  provisions of this Agreement and have no knowledge of any event or
condition which constitutes an Event of Default or, if they have such knowledge,
specifying the nature and period of existence  thereof and that such accountants
have  authorized the Borrower to deliver such  financial  statements and opinion
thereon to the Credit Parties  pursuant to this  Agreement;  provided,  however,
that in  issuing  such  statement,  such  independent  accountants  shall not be
required to go beyond normal  auditing  procedures  conducted in connection with
their opinion referred to above.

         Section 7.4       Performance Certificates.  At the time the financial
statements are furnished pursuant to Section 7.2 hereof, a Performance
Certificate:

         (a)  setting  forth  as  at  the  end  of  such  fiscal  quarter,   the
arithmetical  calculations  required to establish (i) the Applicable Margin, and
(ii)  whether  the  Borrower  was in  compliance  with the  requirements  of the
Financial Covenants;

         (b) setting  forth on a  consolidated  basis for the  Borrower  and its
Subsidiaries,  for each such fiscal  quarter,  (i) the number and type of Towers
built,  acquired or sold by the Borrower or any of its Subsidiaries  during such
period,  (ii) the  location  by state  and  county  of any new  Tower  Sites not
previously  reported  under  this  Section  7.4(b),  (iii)  the  dates  of final
termination  or  expiration of all Tower Site Lease  Agreements  and Tower Space
Lease Agreements occurring during the quarter then ended and for the immediately
following  quarter,  (iv) a list of all anchor  tenants  which are located on at
least five (5) Towers and the total  number of Towers on which each such  anchor
tenant is located,  (v) a list of all Co-Locators  which are located on at least
five (5)  Towers,  including  the total  number  of  Towers  on which  each such
Co-Locator is located and the percentage of all Towers on which such  Co-Locator
is located,  (vi) capacity for additional  tenants per Tower with respect to the
Tower Sites of the  Borrower and its  Subsidiaries  as of the end of such fiscal
quarter,  (vii) the  Co-Location  Percentage as at the end of such quarter,  and
(viii)  with  respect to any Tower  Sites  leased by the  Borrower or any of its
Subsidiaries  which were  acquired  or built  during such  quarter,  whether the
consent of the


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landlord of such Tower Sites is required for an assignment of the Tower Site
Lease Agreement with respect thereto;

         (c) an updated list of all of the Tower Site Lease Agreements and Tower
Space Lease  Agreements  of the Borrower and its  Subsidiaries  as of the end of
such fiscal quarter; and

         (d) stating  that, to the best of his or her  knowledge,  no Default or
Event of Default has occurred as at the end of such period,  or, if a Default or
an Event of  Default  has  occurred,  disclosing  each such  Default or Event of
Default and its nature, when it occurred, whether it is continuing and the steps
being taken by the Borrower with respect to such Default or Event of Default.

         Section 7.5       Copies of Other Reports.

         (a) Promptly upon receipt thereof,  copies of all material reports,  if
any, submitted to Holdco or the Borrower by their independent public accountants
regarding Holdco or the Borrower,  including, without limitation, any management
report prepared in connection with the annual audit referred to in Section 7.3.

         (b) Promptly  upon receipt  thereof,  copies of any material  notice or
report received from the FCC or the FAA or any other Governmental  Authority, or
regarding  any  material  Necessary  Authorization  from  the  grantor  of  such
Necessary Authorization, or regarding any Material Towers.

         (c)  Annually,   a  certificate  of  insurance   indicating   that  the
requirements of Section 6.5 hereof remain satisfied for such fiscal year.

         (d) Annually, and in no event later than January 31 of any year, a copy
of the Borrower's  annual  business plan and updated  financial  projections for
itself and its Subsidiaries for such fiscal year.

         (e) In connection with any proposed  Acquisition by the Borrower or any
of its  Subsidiaries,  and  otherwise  from time to time and promptly  upon each
request, such data,  certificates,  reports,  statements,  documents, or further
information reasonably available to the Borrower regarding the business, assets,
liabilities,  financial  position,  projections,  results of operations,  of the
Borrower  or any of  its  Subsidiaries  as the  Credit  Parties  may  reasonably
request.

         (f) To the extent not covered  elsewhere  in this  Article 7,  promptly
after the sending thereof, copies of all financial statements, reports and other
information  which Holdco,  the Borrower or any of the  Borrower's  Subsidiaries
sends to any holder of its Funded Debt or its  securities or which  Holdco,  the
Borrower or any of the  Borrower's  Subsidiaries  files with the  Securities and
Exchange Commission or any national securities exchange.

         (g) Promptly after the same shall be available to the Borrower,  a true
and correct copy of any collective  bargaining  agreement to which the employees
of the Borrower or any of its Subsidiaries become a party.

         Section 7.6 Notice of Litigation and Other Matters. Prompt notice (and,
in any event notice within three (3) Business Days of the Borrower's  receipt of
notice of the occurrence thereof) of any of the following events after Holdco or
the Borrower has received notice or otherwise becomes aware thereof:


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         (a) the commencement of all material  proceedings and investigations by
or before any governmental  body and all actions and proceedings in any court or
before any  arbitrator  against,  Holdco,  the Borrower or any of the Borrower's
Subsidiaries, or any Material Towers, or material Necessary Authorization;

         (b) any change  with  respect  to the  business,  assets,  liabilities,
financial  position,  results  of  operations  of  the  Borrower  or  any of its
Subsidiaries  that could  reasonably  be expected to have a  Materially  Adverse
Effect;

         (c)  any  Default  or  Event  of   Default,   or  the   occurrence   or
non-occurrence of any event which constitutes, or which with the passage of time
or giving of notice or both would  constitute a default by Holdco,  the Borrower
or any of the Borrower's  Subsidiaries under any material agreement,  other than
this  Agreement,  to  which  Holdco,  the  Borrower  or any  of  the  Borrower's
Subsidiaries  is a party or by which any of their  respective  properties may be
bound,  which reasonably could be expected to have a Materially  Adverse Effect,
giving in each case the details thereof and specifying the action proposed to be
taken with respect thereto;

         (d) any  material  default  under or  misrepresentation  in the  Nextel
Acquisition Documents or the Partners Master Site Lease Agreement,  whether made
or  occurring  before or after the  Agreement  Date,  and copies of all  notices
concerning  defaults received or sent by the Borrower or any of its Subsidiaries
thereunder;

         (e) the  occurrence of any  Reportable  Event or a material  non-exempt
"prohibited  transaction"  (as such term is defined  in Section  406 of ERISA or
Section 4975 of the Code) with respect to any Plan of the Borrower or any of its
Subsidiaries or the institution or threatened institution by PBGC of proceedings
under  ERISA  to  terminate  or to  partially  terminate  any  such  Plan or the
commencement  or threatened  commencement  of any litigation  regarding any such
Plan, other than litigation involving a routine claim for benefits;

         (f) the expiration of any collective  bargaining agreement to which the
Borrower or any of its Subsidiaries become a party; and

         (g) the occurrence of any event subsequent to the Agreement Date which,
if such event had occurred prior to the Agreement Date,  would have  constituted
an  exception  to the  representation  and  warranty  in Section  5.1(l) of this
Agreement.

         Section 7.7 Delivery of  Information  to the Tranche C  Representative.
After  the  Senior  Obligations  have  been  paid in  full in cash or  otherwise
satisfied  to the  satisfaction  of the Senior  Credit  Parties,  and the Senior
Credit  Parties  shall be under no further  obligation  to extend  credit to the
Borrower hereunder, all information required to be delivered pursuant to Section
7.5 and 7.6 to the Arrangers shall be delivered to the Tranche C Representative.


                                    ARTICLE 8

                               Negative Covenants

         So long as any of the  Obligations  is  outstanding  and  unpaid or the
Borrower  has a right to borrow  hereunder  (whether  or not the  conditions  to
borrowing  have  been  or  can  be  fulfilled),  or  any  Letter  of  Credit  is
outstanding,  and unless the Majority Lenders (or such greater number of Lenders
as may be expressly provided herein) shall otherwise consent in writing:



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         Section 8.1  Indebtedness.  Neither Holdco nor the Borrower shall,  and
the Borrower shall cause each of its Subsidiaries not to, create,  assume, incur
or  otherwise  become  or  remain  obligated  in  respect  of,  or  permit to be
outstanding, any Indebtedness except:

         (a)  Indebtedness  under this  Agreement and the other Loan  Documents,
including,   without  limitation,   so  long  as  the  Tranche  C  Loans  remain
outstanding, any Capitalized Interest;

         (b) Trade or  accounts  payable  and  other  obligations,  and  accrued
expenses,  incurred in the ordinary course of business,  other than for borrowed
money;

         (c)  Capitalized  Lease  Obligations  of the Borrower not to exceed the
aggregate  principal  amount of $3,000,000 at any one time  outstanding over the
remainder of the term of such obligations;

         (d) Indebtedness of Tower Sub in favor of the Nextel Tenants secured by
the Nextel Subordinated Lien pursuant to the Nextel Acquisition Documents;

         (e)  Obligations  of  the  Borrower  under  Interest  Hedge  Agreements
required or permitted to be entered into pursuant to Section 6.12 hereof;

         (f)  Indebtedness  of the  Borrower or any of its  Subsidiaries  to the
Borrower  or  any  other  Subsidiary,   and  Indebtedness  that  constitutes  an
Investment permitted under Section 8.2(a) hereof;

         (g)      Guaranties permitted under Section 8.6 hereof;

         (h) With respect to Holdco, (i) Indebtedness  represented by the Holdco
2008 Notes and the Holdco  2009  Notes,  (ii)  Indebtedness  represented  by any
Permitted  High-Yield  Securities  which are debt  securities,  (iii) accrual of
interest,  accrual of dividends, the accretion of accreted value, the payment of
interest in the form of additional  Indebtedness and the payment of dividends in
the form of  additional  shares in respect of the Holdco 2008 Notes,  the Holdco
2009  Notes  or any  other  Permitted  High-Yield  Securities,  and  (iv)  other
Indebtedness  to  the  extent  permitted  to be  incurred  under  either  of the
Indentures, as in effect on the Agreement Date or as amended with the consent of
the Majority Lenders;

         (i) Indebtedness  representing  extensions,  renewals,  refinancings or
replacements  (but not increases in principal  amounts) of any of the foregoing,
(except of the Tranche C Loans, any Capitalized  Interest),  and with respect to
any extension, renewal, refinancing or replacement of the Indebtedness described
in Section 8.1(d),  so long as such  Indebtedness  shall be subject to identical
subordination provisions as the original Indebtedness;

         (j) Indebtedness of the Borrower in respect of conditional sale, rental
or purchase money obligations in an aggregate amount not to exceed $3,000,000 at
any one time outstanding;

         (k)  Indebtedness  secured by Permitted  Liens of the type described in
items (b), (c), (d), (e), (h) and (i) of the definition of Permitted Liens; and

         (l) Other unsecured Indebtedness incurred by the Borrower not to exceed
$3,000,000 in the aggregate at any one time outstanding.

         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


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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) may (a) make  Investments  in and loans to  Subsidiaries  of the
Borrower; (b) purchase or otherwise acquire and own (i) any Investment in direct
obligations of the United States of America or any agency thereof or obligations
Guaranteed  by the  United  States  of  America  or  any  agency  thereof,  (ii)
Investments in time deposit  accounts,  certificates of deposit and money market
deposits maturing within one year of the date of acquisition thereof issued by a
bank or trust company which is organized  under the laws of the United States of
America,  any state  thereof or any  foreign  country  recognized  by the United
States of America having capital,  surplus and undivided profits  aggregating in
excess of $500,000,000  (or the foreign currency  equivalent  thereof) and whose
long-term debt is rated "A" (or such similar  equivalent rating) or higher by at
least one nationally  recognized  statistical rating organization (as defined in
Rule 436 under the  Securities  Act) or any money  market  fund  sponsored  by a
registered   broker  dealer  or  mutual  fund   distributor,   (iii)  repurchase
obligations  with a term of not  more  than  thirty  (30)  days  for  underlying
securities  of the types  described in clause (i) above entered into with a bank
meeting the  qualifications  described in clause (ii) above, (iv) Investments in
commercial paper, maturing not more than one hundred eighty (180) days after the
date of  acquisition,  issued by a  corporation  (other than an Affiliate of the
Borrower)  organized  and in  existence  under the laws of the United  States of
America or any foreign county  recognized by the United States of America with a
rating  at the time as of which  any  Investment  therein  is made of "P-1"  (or
higher)  according  to Moody's  Investors  Service,  Inc.  or "A-1" (or  higher)
according to Standard & Poor's Rating Group,  and (v)  Investments in securities
with maturities of six (6) months or less from the date of acquisition issued or
fully guaranteed by any state, commonwealth or territory of the United States of
America, or by any political  subdivision or taxing authority thereof, and rated
at least "A" by  Standard & Poor's  Ratings  Group or "A" by  Moody's  Investors
Service,  Inc.; (c) make Investments  permitted by Section 8.5 hereof;  (d) make
Investments  existing as of the Agreement  Date as set forth on Schedule  5.1(x)
attached hereto;  (e) make loans or advances to employees in the ordinary course
of  business  in an  aggregate  amount  not to  exceed  $1,000,000  at any  time
outstanding; (f) acquire stock, obligations or securities received in settlement
of debts  created in the  ordinary  course of  business  or in  satisfaction  of
judgments; (g) acquire Capital Stock of Holdco purchased,  redeemed or otherwise
acquired or retired for value from members of Holdco's  management or employees,
but in any event not to exceed  $2,000,000  in the  aggregate in any twelve (12)
month period; (h) incur prepaid expenses,  hold negotiable  instruments held for
collection and lease, or make utility and workers' compensation, performance and
other  similar   deposits;   (i)  make  deposits  of  proceeds  from   Permitted
Dispositions  with a "qualified  intermediary,"  "qualified  trustee" or similar
Person for purposes of  facilitating  a "like-kind"  exchange made in accordance
with the  applicable  provisions of the Code;  and (j) acquire  Capital Stock or
other equity  interests in other Persons  engaged in  businesses  similar to the
Tower  Operations in an aggregate  amount not to exceed $250,000 during the term
of this Agreement.

         Section 8.3 Limitation on Liens. Neither Holdco nor the Borrower shall,
and the Borrower shall cause each of its  Subsidiaries  not to, create,  assume,
incur or permit to exist or to be created,  assumed,  incurred or  permitted  to
exist, directly or indirectly, any Lien on any of their respective properties or
assets, whether now owned or hereafter acquired, except for Permitted Liens.

         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


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certificate or articles of incorporation and by-laws, (b) the Nextel Acquisition
Documents, (c) the Indentures, and (d) the Holdco Equity Documents.

         Section 8.5 Liquidation;  Merger; Acquisition or Disposition of Assets.
Neither Holdco nor the Borrower shall,  and the Borrower shall cause each of its
Subsidiaries  not to, at any time:  (a) liquidate or dissolve  itself (or suffer
any liquidation or dissolution) or otherwise wind up; (b) enter into any merger,
consolidation  or other business  combination;  (c) issue any Capital Stock; (d)
sell, abandon,  transfer, trade or otherwise dispose of, in a single transaction
or in a series of related  transactions,  any  material  portion of its  Assets,
property or business;  (e) acquire  Capital  Stock,  partnership or other equity
interests  or assets,  or make any  Acquisition;  or (f)  create or acquire  any
Subsidiary; provided, however, that:

         (i) Holdco,  the Borrower and its  Subsidiaries  may engage in any such
transactions  required in  connection  with the Nextel  Acquisition  (including,
without limitation the Tower Sub Merger);

         (ii) so long as no Default or Event of Default  then exists or would be
caused thereby the following are permitted:


                  (A) a  merger  among  Holdco,  the  Borrower  or one  or  more
         Subsidiaries  (other than Tower Sub) with or into any other Person, or,
         subject to Section 8.5(vii) below, an Acquisition  permitted  hereunder
         effected by a merger;  provided,  however, that (I) with respect to any
         merger  involving  Holdco,  the Borrower or one of its  Subsidiaries in
         which Holdco or the Borrower is not the surviving entity, the surviving
         entity  shall assume all of the  obligations  of Holdco or the Borrower
         hereunder and under the other Loan Documents, as applicable,  and shall
         execute  and  deliver  to  the   Administrative   Agent  an  assumption
         agreement,  in  form  and  substance  reasonably  satisfactory  to  the
         Arrangers,  (II)  the  surviving  entity,  at its sole  expense,  shall
         promptly  execute  and  deliver to the Credit  Parties,  or cause to be
         executed  and  delivered  to the  Credit  Parties,  all such  other and
         further  documents,  agreements,  and  instruments as may be reasonably
         requested by the Administrative  Agent in connection with the surviving
         entity's  obligations  hereunder  and under the  other  Loan  Documents
         (including,   without  limitation,  (x)  with  respect  to  any  merger
         involving  the  Borrower  in which the  Borrower  is not the  surviving
         entity,  renewal  promissory  notes in favor  of each  Lender  and each
         Tranche  C  Lender,  as  applicable,  (y) a loan  certificate  for such
         surviving  entity,  substantially  in the form of  Exhibit  Y  attached
         hereto, together with appropriate attachments thereto, and (z) original
         UCC-1 financing  statements,  signed by such surviving entity as debtor
         and naming  the  Collateral  Agent as secured  party to be filed in all
         appropriate  jurisdictions,  in such form and  substance  and number as
         shall be reasonably  satisfactory to the Collateral  Agent),  and (III)
         the surviving entity shall provide all other documentation,  including,
         without  limitation,  (x) a Trademark  Security  Agreement or any other
         security  agreement  covering  any  additional   intellectual  property
         obtained  by Holdco  or the  Borrower,  (y) lien  search  results  with
         respect to such surviving entity from all appropriate jurisdictions and
         filing offices,  together with appropriate UCC-3 termination statements
         relating to Liens which are not  Permitted  Liens,  and (z) one or more
         opinions of counsel  satisfactory to the Collateral  Agent which in the
         reasonable  opinion of the Collateral Agent is appropriate with respect
         to such merger and assumption  (any  document,  agreement or instrument
         executed or issued  pursuant to this  Section  8.5(i)  shall be a "Loan
         Document" for purposes of this Agreement);



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                  (B)      a merger between or among two or more Subsidiaries
         (other than Tower Sub); and

                  (C) a liquidation or  dissolution of one or more  Subsidiaries
         (other  Tower  Sub)  into  its or their  parent  entity  (provided  the
         Borrower  or one of its  Subsidiaries  (other  than  Tower Sub) is such
         parent entity);


         (iii) subject to compliance  with Sections 6.10 and 6.16 hereof,  Tower
Sub may acquire the Future Nextel Towers;

         (iv) subject to compliance with the mandatory  prepayment  provision of
Section 2.7(b),  the Borrower and its  Subsidiaries  may sell,  lease,  abandon,
transfer,  trade or otherwise dispose of, in a single transaction or in a series
of related  transactions,  Assets,  at the fair  market  value  thereof,  and in
connection with such disposition the Collateral Agent shall, upon the request of
the  Borrower,  release  any  Liens  granted  pursuant  to any  of the  Security
Documents with respect to such Assets, subject to the following conditions:

                  (A) no Default or Event of Default  shall then exist before or
         after giving effect to such disposition;

                  (B) the  portion of  Annualized  EBITDA  attributable  to such
         Tower  Assets  in the  aggregate,  (I)  together  with the  portion  of
         Annualized  EBITDA  attributable  to all other Tower Assets disposed of
         during the immediately  preceding  twelve (12) month period,  shall not
         exceed ten percent (10%) of the Borrower's Annualized EBITDA calculated
         as of the date of such disposition,  and (II) together with the portion
         of Annualized EBITDA attributable to all other Tower Assets disposed of
         during  the  period  from the  Agreement  Date  through  the  Tranche B
         Maturity  Date,  shall  not  exceed  twenty-five  percent  (25%) of the
         Borrower's  Annualized  EBITDA  calculated  as  of  the  date  of  such
         disposition;  provided,  however,  that,  in the case of an exchange or
         swap of Tower  Assets,  only the excess,  if any, of (x) the portion of
         Annualized  EBITDA  attributable to the Tower Assets being disposed of,
         over (y) the portion of  Annualized  EBITDA  attributable  to the Tower
         Assets  being  acquired,  shall be included in  calculating  Annualized
         EBITDA for purposes of the Annualized EBITDA tests set forth above;

                  (C)  the  Borrower  shall  provide  to the  Arrangers  and the
         Lenders  calculations  demonstrating  pro  forma  compliance  with  the
         Financial Covenants after giving effect to such disposition; and

                  (D) with respect to any  disposition  having a 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 such  disposition and  demonstrating  pro forma  compliance with the
         Financial Covenants through the Tranche B Maturity Date;

         (v) the  Borrower and its  Subsidiaries  (other than Tower Sub) may (A)
make  Investments  as permitted  under  Section  8.2(a) and (b) hereof,  and (B)
transfer Assets amongst themselves;

         (vi) the Borrower and its Subsidiaries may make Capital Expenditures in
the ordinary course of their respective businesses;



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         (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  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 such Acquisition or Investment;

                  (B) the  aggregate  Purchase  Price for Tower Assets  acquired
         (other than the Future Nextel Towers), (I) during any twelve (12) month
         period,  shall not exceed $50,000,000,  and (II) during the period from
         the  Agreement  Date  through  the Tranche B Maturity  Date,  shall not
         exceed $100,000,000;

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

         (viii) the  Borrower  and its  Subsidiaries  (other than Tower Sub) may
acquire and construct Towers and Tower Sites without an anchor tenant reasonably
acceptable  to the Arrangers  (with any Nextel  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
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; and

         (ix) subject to the mandatory  repayment  provisions of Section 2.7(c),
Holdco and the Borrower may issue Permitted High-Yield Securities and Holdco may
issue common stock.

         Section 8.6 Limitation on  Guaranties.  Neither Holdco nor the Borrower
shall, and the Borrower shall cause each of its Subsidiaries not to, at any time
Guaranty,  assume, be obligated with respect to, or permit to be outstanding any
Guaranty of, any  obligation of any other Person other than (a) under any of the
Loan  Documents  or as  permitted  under  Section 8.1 hereof,  (b) a guaranty by
endorsement of negotiable  instruments  for collection in the ordinary course of
business,  and (c)  contingent  obligations  incurred in the ordinary  course of
business with respect


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to surety and appeal bonds, performance and return-of-money bonds and other
similar obligations.

         Section 8.7 Restricted  Payments and Purchases.  Neither Holdco nor the
Borrower shall,  and the Borrower shall cause each of its  Subsidiaries  not to,
directly or  indirectly  declare or make any  Restricted  Payment or  Restricted
Purchase,  except that, so long as no Default or Event of Default then exists or
would result therefrom,  the Borrower may make Restricted  Payments to Holdco to
enable  Holdco to make,  and Holdco may make,  (a) (i) interest  payments on the
Holdco  2008 Notes and on the Holdco 2009  Notes,  or (ii)  interest or dividend
payments, as applicable,  on Permitted High-Yield Securities issued on or before
the Agreement Date, in each case in the case of clauses (i) and (ii),  following
expiration  of the Five Year PIK Period or from a Pre-Funded  Interest  Account,
(b)  dividend or interest  payments,  as  applicable,  on  Permitted  High-Yield
Securities  issued after the Agreement  Date,  following  expiration of the Five
Year PIK Period, or from a Pre-Funded  Interest  Account,  at any time after the
Leverage  Ratio  shall  have been  less than 4.0 to 1.0 for two (2)  consecutive
fiscal  quarters,  (c) payments when due of corporate  franchise  fees and taxes
owed by Holdco that are required to be paid in cash, (d) payments,  when due, of
legal and  accounting  fees and  expenses  actually  incurred by Holdco that are
required  to be paid in cash,  and  payments  for costs  incurred to comply with
Holdco's reporting obligations under federal or state laws,  including,  without
limitation,  reports filed with respect to the Securities  Act, the Exchange Act
or the respective rules and regulations promulgated thereunder, and (e) payments
of  "Additional  Interest" (as that term is defined in the  Registration  Rights
Agreements  entered into in connection with the Holdco 2008 Notes and the Holdco
2009 Notes).

         Section 8.8  Affiliate  Transactions.  Neither  Holdco nor the Borrower
shall, and the Borrower shall cause each of its Subsidiaries not to, at any time
engage in any  transaction  with an  Affiliate,  nor make an assignment or other
transfer of any of its Assets to any Affiliate,  on terms less advantageous than
would be the case if such  transaction  had been effected with a  non-Affiliate,
except (a) with respect to Investments and loans permitted under Section 8.2(a);
(b) with respect to the transactions  contemplated in connection with the Nextel
Acquisition  as described  on Schedule  8.8  attached  hereto and the leasing of
space on the Future Nextel Towers to the Nextel Tenants; (c) with respect to the
Acquisition  of the Future  Nextel  Towers by Tower Sub; (d) the Loans and other
transactions  contemplated by this Agreement and the other Loan  Documents;  and
(e) with respect to the payment of customary  commercial or investment  banking,
underwriting,  placement  agent or financial  advisor fees to  Affiliates of the
Borrower for any such services rendered to the Borrower.

         Section 8.9 Corporate  Name;  Corporate  Structure;  Business.  Neither
Holdco  nor  the  Borrower  shall,  and the  Borrower  shall  cause  each of its
Subsidiaries  not to, (a)  change  its  corporate  name or  corporate  structure
without  giving the  Collateral  Agent thirty (30) days' prior written notice of
its intention to do so and complying  with all  reasonable  requirements  of the
Collateral Agent in regard thereto,  or (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
the  Borrower,  or in each  case,  make  any  material  change  in any of  their
respective business objectives, purposes and operations.

         Section 8.10 Real Estate.  Neither Holdco nor the Borrower,  nor any of
the Borrower's Subsidiaries,  shall purchase or become obligated to purchase any
single  parcel of real  estate  having a purchase  price in excess of  $500,000,
except in  compliance  with Section 6.10 hereof and subject to the  restrictions
contained in Section 8.5(vii) hereof.



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         Section 8.11 ERISA Liabilities.  The Borrower shall not fail, and shall
cause each of its Subsidiaries  not to fail, to make all material  contributions
in accordance  with the terms of their  respective  Plans and to meet all of the
applicable  minimum  funding  requirements  of ERISA and the Code,  and,  to the
extent  that  the  assets  of any of such  Plans  would be less  than an  amount
sufficient to provide all accrued benefits payable under such Plans,  shall make
the  maximum  deductible  contributions  allowable  under the Code.  Neither the
Borrower  nor  any of its  Subsidiaries  shall  incur  any  material  withdrawal
liability with respect to any Multiemployer  Plan.  Neither the Borrower nor any
of its Subsidiaries shall make any commitment to provide  post-employment health
or life  insurance  benefits,  except as  required by Section 601 through 609 of
ERISA.

         Section 8.12 Negative  Pledge.  Neither Holdco nor the Borrower  shall,
directly  or  indirectly,   and  the  Borrower  shall  not  permit  any  of  its
Subsidiaries  to, enter into any agreement  (other than the Loan Documents) with
any Person that  prohibits  or  restricts  or limits the ability of Holdco,  the
Borrower or any Subsidiary of the Borrower to create,  incur,  pledge, or suffer
to exist any Lien upon any of its respective Assets, or restricts the ability of
any  Subsidiary  of the  Borrower to make  Restricted  Payments to the  Borrower
except (a) any encumbrance or restriction  that restricts in a customary  manner
the subletting,  assignment or transfer of any property or asset that is subject
to a  lease,  license  or  other  contract  or the  assignment,  encumbrance  or
hypothecation  of such lease,  license or other contract;  (b) any limitation or
restriction  contained in any  Permitted  Lien to the extent such  limitation or
restriction  restricts  the transfer of the property  subject to such  Permitted
Liens; and (c) any restriction  imposed pursuant to an agreement entered into in
connection  with a  Permitted  Disposition  pending  the closing of such sale or
disposition.


                                    ARTICLE 9

                               Financial Covenants

         Section  9.1  Leverage  Ratio.  Commencing  on the  earlier  of (a) the
Revolving Loan  Availability  Date, or (b) April 1, 2000, the Borrower shall not
permit for each fiscal quarter end thereafter,  or as of the date of any Advance
thereafter,  the  Leverage  Ratio,  after  giving  effect  to such  Advance  (if
applicable),  to exceed the applicable ratio for such date during the periods as
set forth below:

                     Applicable Period                                 Ratio
Revolving Loan Availability Date or April 1, 2000 (as                6.50:1.00
applicable) through June 30, 2000
July 1, 2000 through December 31, 2000                               6.00:1.00
January 1, 2001 through June 30, 2001                                5.50:1.00
July 1, 2001 through December 31, 2001                                5.00:1.00
January 1, 2002 through June 30, 2002                                 4.50:1.00
July 1, 2002 through the Tranche B Maturity Date                      4.00:1.00

         Section 9.2 Interest  Coverage Ratio. The Borrower shall not permit for
the fiscal  quarter ended  September 30, 1999,  and for each fiscal  quarter end
thereafter,  the  Interest  Coverage  Ratio to be less than the ratio  specified
below with respect to such fiscal quarter end:


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<PAGE>




                      Quarters Ending                                  Ratio
September 30, 1999 through December 31, 1999                         1.25:1.00
January 1, 2000 through September 30, 2001                           1.50:1.00
October 1, 2001 through March 31, 2002                               1.75:1.00
April 1, 2002 through December 31, 2002                              2.00:1.00
January 1, 2003 through December 31, 2003                             2.50:1.00
January 1, 2004 through December 31, 2004                             2.75:1.00
January 1, 2005 through the Tranche B Maturity Date                   3.00:1.00

         Section 9.3 Fixed Charge Coverage  Ratio.  During the period from April
1, 2000 through the Tranche B Maturity  Date,  the Borrower shall not permit the
Fixed Charge Coverage Ratio,  for any fiscal quarter end during such period,  to
be less than 1.25 to 1.00.

         Section 9.4 Minimum Annualized EBITDA. For any fiscal quarter ending on
or prior to the  earlier of the (a)  Revolving  Loan  Availability  Date and (b)
March 31, 2000, the Borrower shall not permit Annualized EBITDA as of the end of
such  quarter to be less than the amount  set forth  below with  respect to such
fiscal quarter:


      Quarters Ending                                Minimum Annualized EBITDA
June 30, 1999                                               $21,980,000
September 30, 1999                                          $24,800,000
December 31, 1999                                           $30,000,000
March 31, 2000                                              $35,900,000


                                   ARTICLE 10

                                     Default

         Section  10.1  Events  of  Default  (Senior  Obligations).  Each of the
following  shall  constitute  an Event of  Default  with  respect  to the Senior
Obligations,  whatever  the  reason  for  such  event  and  whether  it shall be
voluntary or  involuntary  or be effected by operation of law or pursuant to any
judgment  or  order  of any  court  or any  order,  rule  or  regulation  of any
governmental or non-governmental body:

         (a) Any  representation  or warranty  made under this  Agreement or any
other Loan  Document  (other than any  Mortgage)  shall prove to be incorrect or
misleading  in any material  respect when made or deemed to be made  pursuant to
Section 5.2 hereof;

         (b) (i) The Borrower  shall  default in the payment of any principal of
the Senior Notes when due, or (ii) the Borrower  shall default in the payment of
any interest,  fees or other amounts payable to any of the Senior Credit Parties
when due and such Default  shall not be cured by payment in full of such amounts
within three (3) days, or (iii) the Borrower shall default in the performance or
observance of any agreement or covenant under Article 9;



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<PAGE>



         (c) The Borrower shall default in the  performance or observance of any
agreement or covenant under Article 7 or Article 8;

         (d) The Borrower shall default in the  performance or observance of any
other  agreement  or  covenant  contained  in this  Agreement  not  specifically
referred to elsewhere in this Section 10.1, and such default, if curable,  shall
not be cured  within the  earlier  of (i) a period of thirty  (30) days from the
date the Borrower knew of the  occurrence  of such default,  or (ii) a period of
thirty (30) days after written notice of such default is given to the Borrower;

         (e) There shall occur any default in the  performance  or observance of
any  agreement or covenant  contained in any of the Loan  Documents  (other than
this  Agreement  or  any  of  the  Mortgages)  by  the  Borrower,   any  of  its
Subsidiaries,  Holdco or any other obligor thereunder,  which shall not be cured
within the cure period, if any, set forth in such Loan Document;

         (f) There  shall be entered  and remain  unstayed a decree or order for
relief in respect of Holdco, the Borrower or any of the Borrower's  Subsidiaries
under  Title  11 of the  United  States  Code as now  constituted  or  hereafter
amended,  or any  other  applicable  Federal  or state  bankruptcy  law or other
similar law, or the appointment of a receiver,  liquidator,  assignee,  trustee,
custodian,  sequestrator or similar  official of Holdco,  the Borrower or any of
the Borrower's  Subsidiaries,  or of any  substantial  part of their  respective
properties,  or ordering the winding-up or liquidation of the affairs of Holdco,
the Borrower or any of the Borrower's  Subsidiaries;  or an involuntary petition
shall  be  filed  against  Holdco,   the  Borrower  or  any  of  the  Borrower's
Subsidiaries and a temporary stay entered,  and (i) such petition and stay shall
not be  diligently  contested,  or (ii)  such  petition  and stay  shall  remain
uncontroverted   for  a  period  of  ten  (10)  consecutive  days,  or  continue
undismissed for a period of sixty (60) consecutive days;

         (g) Any of Holdco,  the Borrower or any of the Borrower's  Subsidiaries
shall file a petition,  answer or consent  seeking  relief under Title 11 of the
United  States  Code,  as now  constituted  or hereafter  amended,  or any other
applicable  Federal or state bankruptcy law or other similar law, or Holdco, the
Borrower or any of the Borrower's  Subsidiaries shall consent to the institution
of proceedings thereunder or to the filing of any such petition or shall seek or
consent to the  appointment  or taking of possession of a receiver,  liquidator,
assignee, trustee, custodian,  sequestrator or other similar official of Holdco,
the Borrower or any of the Borrower's  Subsidiaries,  or of any substantial part
of their respective properties, or Holdco, the Borrower or any of the Borrower's
Subsidiaries  shall fail generally to pay their  respective debts as they become
due, or Holdco,  the Borrower or any of the Borrower's  Subsidiaries  shall take
any action in furtherance of any such action;

         (h) A  judgment  shall be  entered  by any court  against  Holdco,  the
Borrower or any of the  Borrower's  Subsidiaries  for the payment of money which
exceeds  $2,500,000,  or a warrant of attachment or execution or similar process
shall be issued or levied against property of Holdco, the Borrower or any of the
Borrower's  Subsidiaries which, together with all other such property of Holdco,
the  Borrower  or any of the  Borrower's  Subsidiaries  subject  to  other  such
process,  exceeds in value  $2,500,000 in the  aggregate,  and if, within thirty
(30) days after the entry,  issue or levy  thereof,  such  judgment,  warrant or
process shall not have been paid or discharged or stayed pending appeal,  or if,
within twenty (20) days after the  expiration of any such stay,  such  judgment,
warrant or process shall not have been paid or discharged;

         (i) (i) There shall occur a Mortgage Default,  (ii) any Mortgage or any
material  provision  thereof shall at any time and for any reason cease to be in
full force and effect, or be declared by a court of competent jurisdiction to be
null and void,  or a proceeding  shall be commenced  by Holdco,  the  Borrower's
Subsidiaries, or by any Governmental Authority having


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<PAGE>



jurisdiction  over Holdco,  the Borrower or any of the Borrower's  Subsidiaries,
seeking to establish the invalidity or  unenforceability  thereof  (exclusive of
questions of  interpretation  of any provision  thereof),  or (iii) any Mortgage
shall for any reason fail or cease to create a valid and first-priority  Lien on
or Security Interest in the Collateral in favor of the Collateral Agent, for the
benefit of the Senior Credit Parties,  purported to be covered thereby,  subject
to any  Permitted  Lien and  subject  to the lack of  filing of  certain  of the
Mortgages,  or any such  perfected  Lien or  Security  Interest  in favor of the
Collateral  Agent shall cease to be perfected,  and,  unless such Default of the
type  described in clauses  (i),  (ii) or (iii) of this  Section  10.1(i)  shall
relate to more than five percent (5%) of the number of Towers  encumbered by the
Mortgages as of the date of the  occurrence of such Default,  the Borrower fails
to provide to the Collateral Agent, within thirty (30) days after the occurrence
of such  Default,  new  Mortgages  on Towers not then  covered by a Mortgage  or
required to be covered by a Mortgage pursuant to Sections 4.5(a) or 6.10 of this
Agreement,  in number and having fair market  value equal to or greater than the
number and fair market value of the Towers which are subject to such Default;

         (j) There shall be at any time any "accumulated funding deficiency," as
defined in Section 302 of ERISA or in Section 412 of the Code,  with  respect to
any Plan maintained by the Borrower or any of its Subsidiaries,  or to which the
Borrower or any of its Subsidiaries has any material  liabilities,  or any trust
created thereunder;  or a trustee shall be appointed by a United States District
Court to  administer  any such Plan;  or PBGC  shall  institute  proceedings  to
terminate any such Plan; or the Borrower or any of its Subsidiaries  shall incur
any liability to PBGC in connection  with the  termination  of any such Plan; or
any  fiduciary  of, or party in interest to, any Plan or trust created under any
Plan of the Borrower or any of its  Subsidiaries  shall engage in a  "prohibited
transaction" (as such term is defined in Section 406 of ERISA or Section 4975 of
the Code) which  would  subject the  Borrower  or any of its  Subsidiaries  to a
material tax on "prohibited  transactions"  imposed by Section 4975 of the Code;
or any  fiduciary  of, or party in interest to, any Plan or trust  created under
any Plan of the Borrower or any of its Subsidiaries  shall engage in a breach of
fiduciary  responsibility or knowingly participate in any violation of ERISA; or
any Plan of  Borrower  or any of its  Subsidiaries  which is intended to qualify
under  Section  401(a)  of  the  Code  shall  fail  to  meet  the  qualification
requirements  under  such  Code  section,  and,  in each  case,  such  event  or
condition,  together with other such events or conditions, if any, would subject
the Borrower and its Subsidiaries to any tax,  liability or penalty in excess of
$2,500,000;

         (k) There shall occur any default  under any  mortgage,  deed to secure
debt,  note,  loan  agreement,  indenture  or other  instrument  of Holdco,  the
Borrower or any of the Borrower's  Subsidiaries  evidencing  Funded Debt,  which
default is not cured  within the  applicable  cure  period and which  results in
acceleration thereunder of an amount in excess of $2,500,000;

         (l)      There shall occur a Tranche C Default;

         (m) There shall occur any default  which would permit  acceleration  of
the  Indebtedness  evidenced  thereby  under  either  of the  Indentures  or any
Permitted  High-Yield  Securities  (or  documents  evidencing or relating to the
issuance of any Permitted High-Yield Securities);

         (n) There  shall occur an "Event of Default" as such term is defined in
the Nextel Subordinated Security Agreement, or any default under the Master Site
Lease Agreement or the Partners Master Site Lease Agreement, if applicable,  and
as a  result  thereof  Tower  Sites  equal to ten  percent  (10%) or more of the
aggregate number of Tower Sites then leased to the Nextel Tenants shall cease to
be leased  pursuant to the Master Site Lease  Agreement or, if  applicable,  the
Partners Master Site Lease Agreement;



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<PAGE>



         (o) The Borrower and its Subsidiaries  shall, on a consolidated  basis,
fail to own at least that number of Towers equal to ninety  percent (90%) of the
Towers owned by them on the  Agreement  Date,  after giving effect to the Nextel
Acquisition;

         (p) One or more Necessary  Authorizations shall be terminated,  revoked
or suspended such that the Borrower and its  Subsidiaries  are no longer able to
conduct the Tower Operations or any material portion thereof with respect to any
Material Towers and retain the revenue received therefrom, or any such Necessary
Authorizations  shall fail to be renewed at the stated  expiration  thereof such
that the Borrower and its  Subsidiaries  are no longer able to conduct the Tower
Operations or any material  portion  thereof with respect to any Material Towers
and retain the revenue  received  therefrom and in each such case, such Material
Towers are not replaced by new Towers acquired or constructed by the Borrower or
its Subsidiaries within thirty (30) days after the occurrence of such Default;

         (q) Any Security Document (other than any of the Mortgages) or any Note
or any other Loan Document or any material  provision  thereof shall at any time
and for any  reason  cease to be in full force and  effect or be  declared  by a
court of competent  jurisdiction  to be null and void, or a proceeding  shall be
commenced  by  Holdco,  the  Borrower's  Subsidiaries,  or by  any  Governmental
Authority having jurisdiction over Holdco, the Borrower or any of the Borrower's
Subsidiaries,  seeking to establish the invalidity or  unenforceability  thereof
(exclusive of questions of interpretation of any provision thereof),  or Holdco,
the Borrower or any of the  Borrower's  Subsidiaries  shall deny that it has any
liability  or  obligation  for the  payment of  principal  or  interest or other
obligations purported to be created under any Loan Document;

         (r) Any Security  Document (other than any of the Mortgages)  shall for
any  reason  fail or  cease  to  create a valid  and  first-priority  Lien on or
Security  Interest in the Collateral in favor of the Collateral  Agent,  for the
benefit of the Senior Credit Parties,  purported to be covered thereby,  subject
to any Permitted Lien, or any such perfected Lien or Security  Interest in favor
of the Collateral Agent shall cease to be perfected; provided, however, that if,
in the reasonable judgment of the Administrative Agent, such failure is curable,
no such  Event of  Default  shall be deemed to have  occurred  if the  Borrower,
promptly  following notice from the Collateral Agent, shall take such actions as
may be necessary to cure such failure or cessation; or

         (s) There shall occur any Change of Control.

         Section 10.2      Remedies (Senior Obligations).

         (a) If an Event of Default  specified  in Section  10.1  (other than an
Event of Default under Section  10.1(f) or Section  10.1(g)) shall have occurred
and  shall be  continuing,  the  Administrative  Agent,  at the  request  of the
Majority  Lenders,  shall formally declare that an Event of Default has occurred
and (i)  terminate  the Revolving  Commitment  and the Tranche A Commitment,  as
applicable,  and (ii) declare the  principal of and interest on the Senior Loans
and the Senior  Notes and all other  amounts owed to the Senior  Credit  Parties
under this Agreement and the Senior Notes and any other Senior Obligations to be
forthwith due and payable without presentment,  demand, protest or notice of any
kind, all of which are hereby expressly waived, anything in this Agreement or in
the Notes or any other Loan  Document to the contrary  notwithstanding,  and the
Revolving  Commitment  and the Tranche A Commitment  shall  thereupon  forthwith
terminate and all such amounts shall be immediately due and payable,  and during
the continuance of an Event of Default specified in Section 10.1(b) hereof,  the
principal amount of the Senior Loans  outstanding  hereunder shall bear interest
at the Default Rate applicable thereto.



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<PAGE>



         (b)  Upon  the  occurrence  and  continuance  of an  Event  of  Default
specified in Section  10.1(f) or Section  10.1(g),  all principal,  interest and
other amounts due  hereunder  and under the Senior  Notes,  and all other Senior
Obligations,  shall thereupon and concurrently  therewith become due and payable
and the  Revolving  Commitment  and the  Tranche A  Commitment  shall  forthwith
terminate and the  principal  amount of the Senior Loans  outstanding  hereunder
shall bear  interest at the Default  Rate  applicable  thereto,  all without any
action by the Agents,  the Lenders or the Majority  Lenders or any of them,  and
without presentment,  demand,  protest or other notice of any kind, all of which
are expressly waived,  anything in this Agreement or in the other Loan Documents
to the contrary notwithstanding.

         (c) With respect to any  outstanding  Letters of Credit with respect to
which  presentment  for  honor  shall  not  have  occurred  at the  time  of any
acceleration  of the Senior  Obligations  pursuant  to this  Section  10.2,  the
Borrower  shall  promptly,  upon demand by the Issuing Bank,  pay to the Issuing
Bank an amount equal to one hundred two percent (102%) of the aggregate  undrawn
and unexpired amount of each Letter of Credit then outstanding,  which cash will
be held as cash  collateral  by the  Issuing  Bank for the L/C  Obligations  and
applied to the  payment  of drafts  drawn  under such  Letters of Credit and the
unused  portion  thereof after such Letters of Credit shall have expired or been
fully drawn upon,  if any,  shall be applied to repay other  Senior  Obligations
hereunder in the manner set forth in Section 10.4 hereof.

         (d) Upon  acceleration  of the Senior Notes,  as provided in subsection
(a) or (b) of this Section  10.2,  the Agents and the Lenders  shall have all of
the  post-default  rights  granted  to  them,  or any of  them,  under  the Loan
Documents and under Applicable Law.

         (e) Upon  acceleration  of the Senior Notes,  as provided in subsection
(a) or (b) of this Section 10.2, the  Administrative  Agent, upon request of the
Majority Lenders,  shall have the right to the appointment of a receiver for the
properties and assets of the Borrower and its Subsidiaries,  both to operate and
to sell such properties and assets,  and the Borrower,  for itself and on behalf
of its  Subsidiaries,  hereby  consents to such right and such  appointment  and
hereby waives any objection the Borrower or any  Subsidiary  may have thereto or
the right to have a bond or other security posted by the  Administrative  Agent,
on behalf of the Senior Credit Parties, in connection therewith.

         (f) The rights and  remedies  of the Agents and the  Lenders  hereunder
shall be cumulative and not exclusive.

         Section 10.3      Defaults and Remedies (Tranche C Obligations).

         (a) Each of the  following  shall  constitute  a Tranche C Default with
respect to the Tranche C Obligations, and shall automatically, without notice or
other  action,  constitute  an  Event  of  Default  of  the  Senior  Obligations
hereunder,  whatever the reason for such event and whether it shall be voluntary
or involuntary or be effected by operation of law or pursuant to any judgment or
order of any court or any  order,  rule or  regulation  of any  governmental  or
non-governmental body:

                  (i) The Borrower shall default in the payment of any principal
of the Tranche C Notes when due, or the Borrower shall default in the payment of
any interest, fees or other amounts payable to any of the Tranche C Lenders when
due and such  Tranche C Default  shall not be cured by payment  (whether in cash
or, in the case of interest,  in kind) in full of such amounts  within three (3)
days;  provided  that no such Tranche C Default shall be deemed to have occurred
to the extent  that any  payment of  interest  on the Tranche C Loans is made in
kind pursuant to Section 2.3(c)(iii) hereof;


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<PAGE>



                  (ii) The  acceleration  of payment,  pursuant to Section  10.2
hereof, of the Senior Obligations by the Administrative Agent;

                  (iii)    The occurrence of any Event of Default of the type
described in Section 10.1(f) or (g); or

                  (iv)  The  Borrower  shall  default  in  the   performance  or
observance  of any  agreement  or covenant  contained  in Article 6 or 8 hereof,
which default (x) shall not have been cured or remedied to the  satisfaction  of
the Required  Tranche C Lenders  within a period of forty-five  (45) days of the
Borrower's  receipt of notice of such  default or (y) shall not have been deemed
waived  pursuant to Section 13.12 hereof by the Majority  Lenders' waiver of any
corresponding Event of Default.

         (b) A Tranche C Default  occurring  under Section  10.3(a)(ii) or (iii)
shall result in Tranche C Obligations becoming immediately due and payable. If a
Tranche C Default  under  Section  10.3(a)(i) or (iv) shall have occurred and be
continuing,  the Administrative  Agent, at the request of the Required Tranche C
Lenders,  shall formally declare that a Tranche C Default has occurred,  and, to
the extent  permitted  under  Section 2.15 hereof,  declare the principal of and
interest on the Tranche C Loans and the Tranche C Notes,  and all other  amounts
owed to the Tranche C Lenders  under this  Agreement and the Tranche C Notes and
any  other  Tranche C  Obligations,  to be  forthwith  due and  payable  without
presentment,  demand,  protest or notice of any kind  (other  than notice to the
Senior  Credit  Parties),  all  of  which  are  hereby  expressly  waived.  Upon
acceleration  of  the  Tranche  C  Notes  or in  the  event  of  any  Insolvency
Proceeding,  to the extent permitted hereunder and under Section 2.15 hereof, as
provided  herein,  each of the Tranche C Lenders may seek to collect  payment of
the Tranche C  Obligations  and may pursue  other  remedies  available  to them;
provided,  however,  that until the Senior  Obligations  have been fully paid in
cash or otherwise satisfied to the satisfaction of the Senior Credit Parties and
the Senior Commitments have been terminated,  the Tranche C Lenders shall not in
any event (i) take any action or exercise  any remedy  against  any  property or
assets  (other than the Tranche C Pre-Funded  Interest  Account) of Holdco,  the
Borrower or any of the Borrower's  Subsidiaries,  or (ii) commence, or join with
any creditor of Holdco,  the Borrower or any of the Borrower's  Subsidiaries  in
commencing, any Insolvency Proceeding against any of Holdco, the Borrower or any
Subsidiary of the Borrower.

         Section 10.4  Payments  Subsequent to  Acceleration.  Subsequent to the
acceleration  of the Senior  Loans under  Section 10.2 hereof and subject to the
restrictions   contained  in  Section  2.15  hereof   regarding  the  Tranche  C
Obligations,  payments and  prepayments  under this Agreement made to any of the
Credit Parties or otherwise received by any of such Persons (from realization on
Collateral  for  the  Obligations  or  otherwise)  shall  be  paid  over  to the
Administrative  Agent (if necessary) and distributed by the Administrative Agent
as follows:  FIRST, to the reasonable  costs and expenses,  if any,  incurred in
connection with the collection of such payment or prepayment including,  without
limitation,  any reasonable costs incurred by any of them in connection with the
sale or disposition of any Collateral for the Obligations; SECOND, to the Senior
Credit  Parties for any fees  hereunder or under any of the other Loan Documents
then due and  payable;  THIRD,  to the  Lenders  pro-rata  on the basis of their
respective unpaid principal amounts, to the payment of any unpaid interest which
may have  accrued on the Senior  Obligations;  FOURTH,  to the Lenders  pro-rata
until all Senior Loans have been paid in full (and, for purposes of this clause,
obligations  under  Interest Hedge  Agreements  with any of the Lenders shall be
deemed to be Senior Loans and shall be paid on a pro-rata  basis with the Senior
Loans);  FIFTH, to the Lenders pro-rata on the basis of their respective  unpaid
amounts,  to the  payment of any other  unpaid  Senior  Obligations;  SIXTH,  to
damages incurred by any Senior Credit Party by reason of any breach hereof or of
any other Loan Document; SEVENTH, to the


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Tranche C Lenders  pro-rata on the basis of their  respective  unpaid  principal
amounts,  to the payment of any unpaid  interest  which may have  accrued on the
Tranche C Loans;  EIGHTH,  to the Tranche C Lenders pro-rata until all Tranche C
Loans have been paid in full;  NINTH,  to the Tranche C Lenders  pro-rata on the
basis of their  respective  unpaid  amounts,  to the payment of any other unpaid
Tranche C Obligations;  and TENTH, upon satisfaction in full of all Obligations,
to the Borrower or as otherwise required by law.  Notwithstanding the foregoing,
each  Lender  and each  Tranche C Lender may  allocate  amounts  received  by it
pursuant to this Section 10.4 in its discretion to the various  Obligations held
by it.

         Section 10.5 Remedies with Respect to After  Acquired FCC Licenses.  In
the event that Borrower or its  Subsidiaries  should hold any licenses issued by
the  FCC,  then  notwithstanding  anything  to the  contrary  contained  in this
Agreement or any of the Loan  Documents,  the Lenders and their agents shall not
take any action  pursuant to this Agreement or the Loan  Documents,  which would
constitute  or result in any  assignment  of any FCC licenses or any transfer of
control  of the holder of any FCC  license if such  assignment  or  transfer  of
control would require under then existing law (including the Communications Act)
the  prior  approval  of  the  FCC,   without  first  obtaining  such  approval.
Notwithstanding  the occurrence of an Event of Default,  voting rights in any of
the  Collateral,  to the  extent but only to the  extent,  it  includes  the FCC
licenses,  shall remain with Holdco, the Borrower or its Subsidiaries unless and
until all required consents of the FCC shall have been obtained for the exercise
of voting rights by another  entity,  and prior to the exercise of voting rights
by a purchaser of such Collateral at a private or public sale, the prior consent
of the FCC pursuant to 47 U.S.C.  Section  310(d) or any successor  provision of
Applicable  Law will, if required,  be obtained.  Upon the occurrence and during
the continuance of an Event of Default,  the Borrower and its Subsidiaries agree
to  cooperate  with  each  of  the  Credit  Parties  and  their  agents  in  the
preparation,  execution and filing of any  applications  and other documents and
providing  any  information  that may be necessary  or helpful in obtaining  any
consent of the FCC required for the exercise of the Credit Parties' rights under
the Loan Documents.

                                   ARTICLE 11

                                   The Agents

         Section 11.1  Appointment  and  Authorization.  Subject only to Section
11.13 hereof,  each of the Lenders and the Tranche C Lenders hereby  irrevocably
appoints and  authorizes,  and hereby agrees that it will require any transferee
of any of its interest in its Loans and in its Notes  irrevocably to appoint and
authorize,  each of the  Agents to take such  actions as its agent on its behalf
and to exercise such powers  hereunder  and under the Security  Documents as are
delegated  to such Agents by the terms hereof and  thereof,  together  with such
powers of such Agents as are reasonably  incidental thereto.  None of the Agents
nor any of their respective  directors,  officers,  employees or agents shall be
liable for any action taken or omitted to be taken by it or them hereunder or in
connection  herewith,  except for its or their own gross  negligence  or willful
misconduct.

         Section 11.2 Interest Holders.  The Administrative  Agent and the other
Agents may treat each Lender and each Tranche C Lender, or the Person designated
in the last notice filed with the Administrative  Agent under this Section 11.2,
as the holder of all of the  interests  of such  Lender or Tranche C Lender,  as
applicable,  in its  Loans  and in its Note or Notes  until  written  notice  of
transfer, signed by such Lender or Tranche C Lender (or the Person designated in
the  last  notice  filed  with  the  Administrative  Agent)  and by  the  Person
designated  in  such  written   notice  of  transfer,   in  form  and  substance
satisfactory  to the  Administrative  Agent,  shall  have  been  filed  with the
Administrative Agent.


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         Section 11.3 Consultation with Counsel.  The  Administrative  Agent and
the  Collateral  Agent may consult with Paul,  Hastings,  Janofsky & Walker LLP,
special counsel to the  Administrative  Agent and the Collateral  Agent, or with
other  legal  counsel  selected  by them and shall not be liable  for any action
taken or suffered by them in good faith in consultation with such counsel, or at
the  direction  of the  Majority  Lenders  and in  reasonable  reliance  on such
consultations or direction.

         Section 11.4  Documents.  None of the Agents shall be under any duty to
examine,  inquire into, or pass upon the validity,  effectiveness or genuineness
of this Agreement,  any Note, any other Loan Document,  or any other instrument,
document or communication  furnished pursuant hereto or in connection  herewith,
and each of the Agents  shall be entitled  to assume  (absent  knowledge  to the
contrary) that they are valid,  effective and genuine,  have been signed or sent
by the proper parties and are what they purport to be.

         Section 11.5 Agents'  Affiliates.  With respect to the  Commitments and
the Loans, the Agents and their respective Affiliates shall have the same rights
and powers  hereunder and under the other Loan  Documents as any other Lender or
Tranche C Lender, as applicable,  and Affiliates of any of the Agents may accept
deposits from,  lend money to and generally  engage in any kind of business with
Holdco, the Borrower,  any of the Borrower's  Subsidiaries or any Affiliates of,
or Persons doing  business  with,  the Borrower,  as if they were not affiliated
with such Agent and without any obligation to account therefor.

         Section 11.6  Responsibility of the Agents.  The duties and obligations
of each of the Agents under this  Agreement and the Security  Documents are only
those expressly set forth in this Agreement and the Security Documents.  Each of
the Agents  shall be  entitled to assume  that no Default  has  occurred  and is
continuing unless it has actual knowledge, or has been notified by the Borrower,
of such fact,  or has been notified by a Lender or a Tranche C Lender in writing
that such  Lender or  Tranche C  Lender,  as the case may be,  considers  that a
Default has occurred and is continuing,  and such Lender or Tranche C Lender, as
the case may be, shall specify in detail the nature thereof in writing.  None of
the Agents shall be liable hereunder for any action taken or omitted to be taken
except for its own gross negligence or willful  misconduct.  The  Administrative
Agent shall provide  promptly each of the Lenders and the Tranche C Lenders with
copies of such documents  received from the Borrower as such Lender or Tranche C
Lender, as the case may be, may reasonably request.

         Section 11.7 Security  Documents.  The Collateral  Agent, as collateral
agent hereunder and under the Security Documents, is hereby authorized to act on
behalf of the Lenders and the Tranche C Lenders, in its own capacity and through
other agents and  sub-agents  appointed by it with due care,  under the Security
Documents, provided that, unless otherwise expressly provided in this Agreement,
the Collateral  Agent shall not agree to the release of any  Collateral,  or any
property  encumbered by any  mortgage,  pledge or security  interests  except in
compliance  with Section  13.12 hereof.  In connection  with its role as secured
party with respect to the Collateral hereunder,  the Collateral Agent shall act,
subject to the  provisions  of Section 2.15 hereof,  as  collateral  agent,  for
itself and for the benefit of the  Lenders  and the Tranche C Lenders,  and such
role as  collateral  agent  shall  be  disclosed  on all  appropriate  accounts,
certificates,   filings,   mortgages,   and  other   collateral   documentation.
Notwithstanding anything to the contrary contained herein or in any of the other
Loan Documents,  the Security Interest in the Nextel Collateral shall be granted
to the  Collateral  Agent on behalf of all of the  Credit  Parties as and to the
extent set forth in the Security  Documents and in Section 2.15 hereof,  and the
Security Interest in the Collateral (other than the Nextel  Collateral) shall be
granted to the Collateral Agent on behalf of the Senior Credit Parties. Further,
the Security  Interest in the Tranche C  Pre-Funded  Interest  Account  shall be
granted to the Collateral Agent on behalf of the Tranche C


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Lenders as and to the extent set forth in the Security  Documents and in Section
2.15  hereof.  The Tranche C Lenders  shall not be deemed to have any Lien on or
security  interest in (whether through the Collateral Agent or otherwise) any of
the Collateral other than the Nextel Collateral.

         Section 11.8      Action by the Agents.

         (a) Each of the Agents  shall be  entitled to use its  discretion  with
respect to  exercising  or refraining  from  exercising  any rights which may be
vested in it by, and with respect to taking or refraining from taking any action
or actions which it may be able to take under or in respect of, this  Agreement,
unless such Agent shall have been instructed by the Majority Lenders to exercise
or refrain  from  exercising  such rights or to take or refrain from taking such
action;  provided  that the  Administrative  Agent shall not exercise any rights
under Section 10.2(a) of this Agreement  except upon the request of the Majority
Lenders.  None of the Agents  shall incur any  liability  under or in respect of
this Agreement with respect to anything which it may do or refrain from doing in
the reasonable  exercise of its judgment or which may seem to it to be necessary
or desirable in the  circumstances  for the  protection  of the interests of the
Lenders  and the  Tranche  C  Lenders,  as  applicable,  except  for  its  gross
negligence  or willful  misconduct,  or conduct in breach of this  Agreement  as
determined by a final,  non-appealable order of a court having jurisdiction over
the subject matter.

         (b) None of the Agents  shall be liable to the Lenders or the Tranche C
Lenders,  or to any Lender or any Tranche C Lender, in acting or refraining from
acting under this  Agreement or any other Loan Document in  accordance  with the
instructions  of the  Majority  Lenders (or all of the Lenders  where  expressly
required by this Agreement),  and any action taken or failure to act pursuant to
such instructions shall be binding on all Lenders and all Tranche C Lenders,  as
applicable.

         Section  11.9 Notice of Default or Event of Default.  In the event that
any Agent or any Lender or any Tranche C Lender shall acquire actual  knowledge,
or shall have been notified,  of any Default (other than through a notice by one
party  hereto to all other  parties)  or Tranche C  Default,  such Agent or such
Lender or such Tranche C Lender,  as the case may be, shall promptly  notify the
Administrative  Agent and the Collateral Agent, and the Administrative Agent and
the  Collateral  Agent shall take such action and assert such rights  under this
Agreement  and the other Loan  Documents as the Majority  Lenders (or all of the
Lenders where  expressly  required by this  Agreement)  direct,  and neither the
Administrative  Agent nor the Collateral Agent shall be subject to any liability
by reason of its acting  pursuant to any such request.  If the Majority  Lenders
shall fail to request the  Administrative  Agent or the Collateral Agent to take
action or to assert rights under this Agreement in respect of any Default within
ten (10) days after their receipt of the notice of any Default from any Agent or
any Lender or any Tranche C Lender,  or shall request  inconsistent  action with
respect to such Default,  the Administrative Agent and the Collateral Agent may,
but shall not be required  to,  take such  action and assert such rights  (other
than  rights  under  Article 10 hereof) as they deem in their  discretion  to be
advisable for the  protection  of the Lenders and the Tranche C Lenders,  except
that, if the Majority  Lenders have instructed the  Administrative  Agent or the
Collateral Agent not to take such action or assert such right, in no event shall
the Administrative Agent or the Collateral Agent, as applicable, act contrary to
such instructions.

         Section 11.10     Responsibility Disclaimed.  None of the Agents shall
be under any liability or responsibility whatsoever as an Agent:

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         (a) To the Borrower or any other Person as a consequence of any failure
or delay in  performance  by or any  breach by, the  Lenders  and the  Tranche C
Lenders,  or  any of  them,  of any of  its  or  their  obligations  under  this
Agreement;

         (b) To the  Lenders  and the  Tranche C Lenders,  or any of them,  as a
consequence  of any  failure or delay in  performance  by, or any breach by, (i)
Holdco  or the  Borrower  of any of  their  respective  obligations  under  this
Agreement or the Notes, as applicable,  or any other Loan Document,  or (ii) any
Subsidiary of the Borrower or any other  obligor under any other Loan  Document;
or

         (c) To the Lenders and the Tranche C Lenders,  or any of them,  for any
statements,  representations  or  warranties  in this  Agreement,  or any  other
document  contemplated  by this  Agreement  or any other Loan  Document,  or any
information provided pursuant to this Agreement, any other Loan Document, or any
other  document   contemplated   by  this   Agreement,   or  for  the  validity,
effectiveness,  enforceability or sufficiency of this Agreement,  the Notes, any
other Loan Document, or any other document contemplated by this Agreement.

         Section  11.11  Indemnification.  The Lenders and the Tranche C Lenders
agree to indemnify each of the Administrative Agent and the Collateral Agent (to
the extent not  reimbursed by the Borrower),  pro-rata in accordance  with their
respective  Commitment  Ratios,  from  and  against  any  and  all  liabilities,
obligations,  losses,  damages,  penalties,  actions,  judgments,  suits, costs,
expenses  (including,  without  limitation,  reasonable  fees  and  expenses  of
experts,  agents,  consultants  and counsel),  or  disbursements  of any kind or
nature  whatsoever  which may be imposed on, incurred by or asserted against the
Administrative  Agent or the Collateral  Agent in any way relating to or arising
out of its role as Administrative Agent or Collateral Agent, as the case may be,
under  this  Agreement,   any  other  Loan  Document,   or  any  other  document
contemplated   by  this  Agreement  or  any  action  taken  or  omitted  by  the
Administrative  Agent or the Collateral  Agent under this  Agreement,  any other
Loan Document,  or any other document contemplated by this Agreement in its role
as  Administrative  Agent or Collateral  Agent,  as the case may be, except that
none  of  the  Lenders  or  the  Tranche  C  Lenders  shall  be  liable  to  the
Administrative   Agent  or  the  Collateral   Agent  for  any  portion  of  such
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses, or disbursements resulting from the gross negligence or willful
misconduct of the  Administrative  Agent or the Collateral Agent, as applicable,
as determined by a final,  non-appealable  order of a court having  jurisdiction
over the subject matter.

         Section 11.12     Credit Decision.  Each of the Lenders and the Tranche
C Lenders represents and warrants to each other Credit Party that:

         (a) In making its decision to enter into this Agreement and to make its
Advances it has  independently  taken whatever  steps it considers  necessary to
evaluate the  financial  condition  and affairs of Holdco,  the Borrower and the
Borrower's Subsidiaries and that it has made an independent credit judgment, and
that it has not relied upon any other Credit Party or upon information  provided
by any Agent (other than  information  provided to the Arrangers by the Borrower
and forwarded by the Arrangers to the Lenders and the Tranche C Lenders); and

         (b) So long as any portion of the Obligations remains  outstanding,  it
will continue to make its own independent  evaluation of the financial condition
and affairs of Holdco, the Borrower and the Borrower's Subsidiaries.

         Section 11.13     Successor Agents.  Subject to the appointment and
acceptance of a successor Agent as provided below, any Agent may resign at any
time by giving written notice


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thereof to the Lenders, the Tranche C Representative and the Borrower.  Upon any
such  resignation,  the  Majority  Lenders  shall  have the  right to  appoint a
successor Agent with, so long as no Default or Event of Default then exists, the
consent of the Borrower.  If no successor  Agent shall have been so appointed by
the  Majority  Lenders  with,  so long as no Default  or Event of  Default  then
exists,  the consent of the Borrower,  and shall have accepted such  appointment
within  thirty (30) days after the retiring  Agent gives notice of  resignation,
then the retiring Agent may, on behalf of the Lenders and the Tranche C Lenders,
appoint  a  successor  Agent  which  shall be any  Lender or a  commercial  bank
organized  under the laws of the  United  States  of  America  or any  political
subdivision  thereof  which  has  combined  capital  and  reserves  in excess of
$500,000,000,  or any existing Lender. Upon the acceptance of any appointment as
an Agent  hereunder by a successor  Agent such successor  Agent shall  thereupon
succeed to and become vested with all the rights, powers, privileges, duties and
obligations  of the retiring  Agent,  and the retiring Agent shall be discharged
from  its  duties  and  obligations   hereunder.   After  any  retiring  Agent's
resignation hereunder as Agent, the provisions of this Article shall continue in
effect for its benefit in respect of any actions taken or omitted to be taken by
it while it was  acting as an Agent.  The  resignation  of an Agent may not take
effect until a successor Agent is appointed.

         Section  11.14  Relationship  Among  the  Credit  Parties.  Each of the
Tranche C Lenders hereby waives every defense, cause of action,  counterclaim or
set-off, which such Tranche C Lender may now have, or hereafter may have, to any
action  by  any  of  the  other  Credit  Parties  in  enforcing  this  Agreement
(including,  without limitation,  the terms of Section 2.15 hereof),  and hereby
ratifies and confirms  whatever such Credit Parties may do pursuant to the terms
hereof and agrees that none of the other Credit  Parties shall be liable for any
errors of  judgment  or mistake of fact or law except  resulting  from the gross
negligence or willful  misconduct of such Credit Party as determined by a final,
non-appealable order of a court having jurisdiction over the subject matter. The
Tranche  C  Lenders  agree  to pay all  reasonable  costs,  legal  expenses  and
attorneys' and  paralegals'  fees of every kind,  paid or incurred by any of the
other Credit Parties in enforcing their  respective  rights under this Agreement
and the other Loan Documents against the Tranche C Lenders  (including,  but not
limited  to,  proceedings  under  the  Bankruptcy  Code)  in so  enforcing  this
Agreement and the other Loan Documents promptly on demand of the Credit Party or
other person  paying or incurring  the same.  The Tranche C Lenders shall not be
responsible  for the other Credit Parties' fees and expenses for enforcing their
respective rights and remedies against the Borrower,  any of its Subsidiaries or
any other obligor  under the Senior  Obligations.  This  provision is a material
inducement  for the Agents and the Lenders to enter into this  Agreement  and to
make their respective Loans to the Borrower.

         Section  11.15  Co-Agents;   Managing  Agents.   None  of  the  Lenders
identified  on the  facing  page of,  signature  pages of or  elsewhere  in this
Agreement as a  "co-agent"  or  "managing  agent"  shall have any right,  power,
obligation, liability,  responsibility or duty under this Agreement or any other
Loan  Document  other  than those  applicable  to all  Lenders as such.  Without
limiting  the  foregoing,  none of the  Lenders so  identified  shall have or be
deemed to have any fiduciary  relationship  with any other  Lender.  Each Lender
acknowledges that it has not relied, and will not rely, on any of the Lenders so
identified  in deciding to enter into this  Agreement or any other Loan Document
or in taking or not taking action hereunder or thereunder.


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                                   ARTICLE 12

                             Change in Circumstances
                          Affecting Eurodollar Advances

         Section 12.1 Eurodollar Basis  Determination  Inadequate or Unfair.  If
with  respect to any  proposed  Eurodollar  Advance for any  Eurodollar  Advance
Period, the Administrative  Agent determines after consultation with the Lenders
that  deposits in Dollars (in the  applicable  amount) are not being  offered to
each of the Lenders in the relevant market for such  Eurodollar  Advance Period,
the Administrative Agent shall forthwith give notice thereof to the Borrower and
the Lenders,  whereupon until the circumstances giving rise to such situation no
longer exist, the obligations of any affected Lender to make Eurodollar Advances
shall be suspended.

         Section 12.2 Illegality.  If, after the Agreement Date, the adoption of
any  Applicable  Law,  or any  change in any  Applicable  Law,  or any change in
interpretation or administration thereof by any Governmental Authority,  central
bank or comparable  agency  charged with the  interpretation  or  administration
thereof,  or compliance by any Lender with any directive  (whether or not having
the force of law) of any such  authority,  central  bank or  comparable  agency,
shall make it unlawful or  impossible  for any Lender to make,  maintain or fund
Eurodollar Advances,  such Lender shall so notify the Administrative  Agent, and
the  Administrative  Agent  shall  forthwith  give  notice  thereof to the other
Lenders and the Borrower.  Before giving any notice to the Administrative  Agent
pursuant to this Section 12.2, such Lender shall  designate a different  lending
office if such  designation  will avoid the need for giving such notice and will
not,  in  the  sole   judgment  of  such   Lender,   be   otherwise   materially
disadvantageous  to such Lender.  Upon  receipt of such notice,  notwithstanding
anything  contained in Article 2 hereof,  the  Borrower  shall repay in full the
then  outstanding  principal  amount of each Eurodollar  Advance of such Lender,
together with accrued  interest  thereon and any  reimbursement  required  under
Section 2.10 hereof,  on either (a) the last day of the then current  Eurodollar
Advance Period  applicable to such affected  Eurodollar  Advances if such Lender
may lawfully continue to maintain and fund such Eurodollar  Advances to such day
or (b) immediately if such Lender may not lawfully continue to fund and maintain
such affected Eurodollar  Advances to such day.  Concurrently with repaying each
affected Eurodollar Advance of such Lender,  notwithstanding  anything contained
in Article 2 or Article 4 hereof,  the  Borrower  may borrow a Base Rate Advance
from such Lender, and such Lender shall make such Advance,  if so requested,  in
an amount such that the  outstanding  principal  amount of the Note held by such
Lender shall equal the  outstanding  principal  amount of such Note  immediately
prior to such repayment.

         Section 12.3      Increased Costs.

         (a) If, after the Agreement  Date, the adoption of any Applicable  Law,
or any  change  in any  Applicable  Law,  or any  interpretation  or  change  in
interpretation or administration thereof by any Governmental Authority,  central
bank or comparable  agency  charged with the  interpretation  or  administration
thereof or compliance  by any Lender with any  directive  (whether or not having
the force of law) of any such authority, central bank or comparable agency:

                  (i) shall  subject any Lender to any tax, duty or other charge
with respect to its obligation to make Eurodollar Advances,  or shall change the
basis of taxation of payments to any Lender of the  principal  of or interest on
its  Eurodollar  Advances  or in  respect  of any other  amounts  due under this
Agreement,  in respect of its  Eurodollar  Advances  or its  obligation  to make
Eurodollar  Advances (except for changes in the rate or method of calculation of
tax on the overall net income of such Lender); or



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                  (ii)  shall  impose,  modify or deem  applicable  any  reserve
(including,  without  limitation,  any imposed by the Board of  Governors of the
Federal Reserve System,  but excluding any included in an applicable  Eurodollar
Reserve  Percentage),  special deposit,  capital  adequacy,  assessment or other
requirement or condition against assets of, deposits with or for the account of,
or  commitments  or credit  extended  by, any  Lender in  respect of  Eurodollar
Advances or shall impose on any Lender or the London interbank  borrowing market
any other condition  affecting its obligation to make Eurodollar Advances or its
Eurodollar Advances;

and the result of any of the foregoing is to increase the cost to such Lender of
making or maintaining any such Eurodollar  Advances,  or to reduce the amount of
any sum received or receivable by such Lender under this  Agreement or under its
Note with  respect  thereto,  then,  within  five (5) days after  demand by such
Lender,  the  Borrower  agrees to pay to such Lender such  additional  amount or
amounts as will  compensate  such  Lender for such  increased  costs;  provided,
however,  that  notwithstanding  the  foregoing,  the  Borrower  shall  have  no
obligation  to make any such payment in respect of any such costs  incurred more
than  ninety (90) days prior to its  receipt of notice  from such  Lender.  Each
Lender will  promptly  notify the Borrower and the  Administrative  Agent of any
event of which it has  knowledge,  occurring  after the date hereof,  which will
entitle  such  Lender to  compensation  pursuant to this  Section  12.3 and will
designate a different  lending  office if such  designation  will avoid the need
for,  or reduce the  amount  of,  such  compensation  and will not,  in the sole
judgment of such Lender, be otherwise disadvantageous to such Lender.

         (b) Any Lender  claiming  compensation  under this  Section  12.3 shall
provide the Borrower with a written  certificate  setting  forth the  additional
amount or  amounts  to be paid to it  hereunder  and  calculations  therefor  in
reasonable detail. Such certificate shall be conclusive,  absent manifest error.
In determining  such amount,  such Lender may use any  reasonable  averaging and
attribution methods. If any Lender demands compensation under this Section 12.3,
the Borrower may at any time, upon at least five (5) Business Days' prior notice
to such Lender, prepay in full the then outstanding  Eurodollar Advances of such
Lender, together with accrued interest thereon to the date of prepayment,  along
with any  reimbursement  required under Section 2.10 hereof.  Concurrently  with
prepaying such Eurodollar Advances,  the Borrower may borrow a Base Rate Advance
from such Lender,  and such Lender shall, if so requested,  make such Advance in
an amount such that the  outstanding  principal  amount of the Note held by such
Lender shall equal the  outstanding  principal  amount of such Note  immediately
prior to such prepayment.

         Section  12.4  Effect On Other  Advances.  (a) If notice has been given
pursuant to Section 12.1,  12.2 or 12.3  suspending the obligation of any Lender
to make Eurodollar  Advances,  or requiring Eurodollar Advances of any Lender to
be converted, repaid or prepaid, then, unless and until the circumstances giving
rise to such repayment no longer apply,  all Advances  which would  otherwise be
made by such Lender as  Eurodollar  Advances  affected  shall be made instead as
Base Rate Advances.

         (b) Within  sixty (60) days after  written  notice  pursuant to Section
12.1, 12.2 or 12.3 by any Lender, the Borrower may, in its discretion, provide a
replacement  lender or lenders  for such  Lender,  which  replacement  lender or
lenders will be subject to the approval of the Administrative  Agent,  which, so
long as there exists no Default or Event of Default,  shall not be  unreasonably
withheld,  and the Administrative Agent, such Lender and the Borrower shall take
all necessary  actions to transfer the rights,  duties and  obligations  of such
Lender to such  replacement  lender or lenders within such sixty (60) day period
(including,  without  limitation,  the payment in full of all Senior Obligations
hereunder due to the Lender being replaced.




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                                   ARTICLE 13

                                  Miscellaneous

         Section 13.1      Notices.

         (a) Unless  otherwise  specifically  provided  herein,  all notices and
other  communications  under this  Agreement  shall be in  writing  and shall be
deemed to have been given five (5) days after deposit in the mail, designated as
certified mail, return receipt requested,  postage-prepaid,  or one (1) Business
Day after being entrusted to a reputable  commercial overnight delivery service,
or when sent by telecopy addressed to the party to which such notice is directed
at its address  determined  as provided in this  Section  13.1.  All notices and
other  communications  under this Agreement shall be given to the parties hereto
at the following addresses:

                (i)        If to the Borrower, to it at:

                           SpectraSite Communications, Inc.
                           8000 Regency Parkway, Suite 570
                           Cary, North Carolina 27511
                           Attention: David Tomick
                           Telecopy No.: (919) 468-8522

                           with a copy to:

                           Dow, Lohnes & Albertson, PLLC
                           1200 New Hampshire Avenue, N.W. Suite 800
                           Washington, D.C. 20036-6802
                           Attention: Timothy J. Kelley, Esq.
                           Telecopy No.: (202) 776-2222

               (ii) If to the  Administrative  Agent or the Collateral Agent, to
it at:

                           Canadian Imperial Bank of Commerce
                           425 Lexington Avenue
                           New York, New York 10017
                           Attention: Christine Aharonian
                           Telecopy No.: (212) 856-3763

                  with a copy to:

                           Paul, Hastings, Janofsky & Walker LLP
                           600 Peachtree Street, Suite 2400
                           Atlanta, Georgia  30308-2222
                           Attention: Chris D. Molen, Esq.
                           Telecopy No.: (404) 815-2424



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<PAGE>



              (iii) If to any Arranger, to each of them at:

                           Canadian Imperial Bank of Commerce
                           425 Lexington Avenue
                           New York, New York 10017
                           Attention: Colleen Risorto
                           Telecopy No.: (212) 856-3558

                           and to:

                           Credit Suisse First Boston
                           Eleven Madison Avenue
                           New York, New York 10010
                           Attention: Todd C. Morgan
                           Telecopy No.: (212) 325-8314

                           with a copy to:

                           Paul, Hastings, Janofsky & Walker LLP
                           600 Peachtree Street, Suite 2400
                           Atlanta, Georgia  30308-2222
                           Attention: Chris D. Molen, Esq.
                           Telecopy No.: (404) 815-2424

               (iv) If to the Tranche C Representative, to it at:

                           WCAS Capital Partners III, L.P.
                           c/o Welsh, Carson, Anderson & Stowe
                           320 Park Avenue
                           New York, New York 10022
                           Attention: Lawrence B. Sorrell
                           Telecopy No.: (212) 893-9566

                           with a copy to:

                           Reboul, MacMurray, Hewitt, Maynard & Kristol
                           45 Rockefeller Plaza
                           New York, New York 10111
                           Attention: Robert A. Schwed, Esq.
                           Telephone No.: (212) 841-5725

                  If to the Lenders,  to them at the  addresses set forth beside
                  their names on Schedule 1, and if to the Tranche C Lenders, to
                  them at the  addresses  specified  by written  notice from the
                  Tranche C Representative to the Administrative  Agent prior to
                  the initial funding of the Tranche C Loans.

         (b) Copies shall be provided to Persons  other than the parties  hereto
only in the case of notices under Article 10 hereof.

         (c) Any party hereto may change the address to which  notices  shall be
directed under this Section 13.1 by giving ten (10) days' written notice of such
change to the other parties.


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         Section 13.2      Expenses. The Borrower shall promptly pay or
reimburse:

         (a) all reasonable legal expenses of the  Administrative  Agent and the
Collateral Agent and all reasonable other  out-of-pocket  expenses of the Agents
incurred in connection with the preparation, negotiation, execution and delivery
of  this  Agreement  and  the  other  Loan  Documents,   and  the   transactions
contemplated  hereunder  and  thereunder  and the making of the initial  Advance
hereunder (whether or not such Advance is made), including,  but not limited to,
the reasonable fees and disbursements of Paul, Hastings,  Janofsky & Walker LLP,
special counsel for the Administrative Agent and the Collateral Agent;

         (b) all reasonable legal expenses of the  Administrative  Agent and the
Collateral Agent and all other reasonable  out-of-pocket  expenses of the Agents
in connection with the syndication of the Loans;

         (c) all reasonable legal expenses of the  Administrative  Agent and the
Collateral Agent and all other reasonable  out-of-pocket  expenses of the Agents
in connection with the  administration of the transactions  contemplated in this
Agreement or the other Loan Documents,  and all other reasonable expenses of the
Agents  customarily  reimbursed by borrowers for  transactions  of similar size,
type and purpose as such transactions;

         (d)  from  and  after  the  occurrence  of an  Event  of  Default,  all
reasonable legal and other out-of-pocket  expenses of the Agents and the Lenders
incurred in connection  with any  restructuring  or "work out" of, or bankruptcy
proceeding  relating to, the transactions  contemplated by this Agreement or the
other Loan Documents, and the preparation,  negotiation,  execution and delivery
of any waiver,  amendment  or consent by the Agents and the Lenders  relating to
this Agreement or the other Loan Documents,  including,  but not limited to, the
fees and disbursements of any experts,  agents or consultants and of counsel for
the  Administrative  Agent and the Collateral  Agent, and any exercise by any of
the Agents or the  Lenders of their  respective  remedies  provided  for in this
Agreement or the other Loan Documents.

         Section  13.3  Waivers.  The rights and  remedies of the Agents and the
Lenders under this  Agreement and the other Loan  Documents  shall be cumulative
and not exclusive of any rights or remedies which they would  otherwise have. No
failure or delay by the Agents,  the Majority Lenders or the Lenders,  or any of
them,  in  exercising  any right shall  operate as a waiver of such  right.  The
Agents and the Lenders  expressly reserve the right to require strict compliance
with the terms of this  Agreement  in  connection  with any future  funding of a
request for an Advance.  In the event the Lenders decide to fund an Advance at a
time  when the  Borrower  is not in  strict  compliance  with the  terms of this
Agreement,  such  decision by the Lenders  shall not be deemed to  constitute an
undertaking  by the  Lenders to fund any further  Advances  or to  preclude  the
Lenders or the Agents from  exercising  any rights  available  to them under the
Loan  Documents  or at law or equity.  Any waiver or  indulgence  granted by the
Agents,  the Majority  Lenders or Lenders shall not constitute a modification of
this  Agreement,  except to the  extent  expressly  provided  in such  waiver or
indulgence, or constitute a course of dealing at variance with the terms of this
Agreement  such as to require  further  notice of their intent to require strict
adherence to the terms of this Agreement in the future.

         Section  13.4  Set-Off.  In  addition  to any rights  now or  hereafter
granted  under  Applicable  Law and not by way of limitation of any such rights,
upon the occurrence of an Event of Default and during the continuation  thereof,
the Agents and the Lenders are hereby  authorized  by Holdco and the Borrower at
any time or from time to time,  without notice to Holdco, the Borrower or to any
other Person,  any such notice being hereby expressly  waived, to set-off and to
appropriate  and to apply any and all  deposits  (general  or  special,  time or
demand, including, but not limited to, Indebtedness evidenced by certificates of
deposit, in each case whether matured or



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<PAGE>



unmatured) and any other Indebtedness at any time held or owing by any Lender or
any Agent to or for the credit or the account of Holdco,  the Borrower or any of
its Subsidiaries  against and on account of the Senior Obligations  irrespective
of whether (a) the Lenders and the Agents,  or any of them,  shall have made any
demand  hereunder  or (b) the  Administrative  Agent  shall  have  declared  the
principal of and interest on the Senior Loans and other amounts due hereunder to
be due and payable as  permitted  by Section 10.2 hereof and although all or any
of such Senior Obligations shall be contingent or unmatured. The Agent or Lender
which has effected such set-off and  application  of proceeds  shall endeavor to
promptly notify the Borrower thereof,  but the failure to give such notice shall
not affect the validity of such set-off or  application.  Upon  direction by the
Administrative  Agent,  with the consent of the  Majority  Lenders,  each Lender
holding  deposits  of Holdco,  the  Borrower  or any of its  Subsidiaries  shall
exercise its set-off rights as so directed.

         Section 13.5      Successors and Assigns; Participations and
Assignments.

                  (a) This  Agreement  shall be  binding  upon and  inure to the
benefit of Holdco,  the  Borrower  and the Credit  Parties and their  respective
successors  and assigns,  except that neither the Borrower nor Holdco may assign
or transfer any of its rights or obligations  under this  Agreement  without the
prior written consent of each Lender.

                  (b) Any Lender  may,  in the  ordinary  course of  business or
investment in accordance  with  Applicable Law, at any time sell, to one or more
banks or other  entities  ("Participants")  participating  interests in any Loan
owing to such Lender,  any  Commitment of such Lender,  or any other interest of
such Lender  hereunder and under the other Loan  Documents.  In the event of any
such sale by a Lender of a  participating  interest to a  Participant,  (i) such
Lender's obligations under this Agreement to the other parties to this Agreement
shall remain unchanged, (ii) such Lender shall remain solely responsible for the
performance thereof,  (iii) such Lender shall remain the holder of any such Loan
for all purposes under this Agreement and the other Loan Documents, and (iv) the
Borrower and the Administrative Agent shall continue to deal solely and directly
with such Lender in connection with such Lender's  rights and obligations  under
this  Agreement  and the other Loan  Documents.  No Lender  shall be entitled to
create in favor of any Participant,  in the participation  agreement pursuant to
which such Participant's  participating  interest shall be created or otherwise,
any  right to vote  on,  consent  to or  approve  any  matter  relating  to this
Agreement  or any other Loan  Document  except for those  matters  specified  as
requiring  the  consent of all Lenders in Section  13.12  hereof.  The  Borrower
agrees  that upon the  occurrence  and  during  the  continuance  of an Event of
Default,  each Participant  shall, to the maximum extent permitted by Applicable
Law,  be deemed to have the right of set-off  in  respect  of its  participating
interest  in amounts  owing  under this  Agreement  to the same extent as if the
amount of its participating interest were owing directly to it as a Lender under
this Agreement;  provided that, in purchasing such participating  interest, such
Participant  shall be  deemed  to have  agreed  to share  with the  Lenders  the
proceeds  thereof as  provided  in Section  13.4 as fully as if it were a Lender
hereunder.  The Borrower also agrees that each Participant  shall be entitled to
the  benefits of Section 2.12 and Article 12 of this  Agreement  with respect to
its  participation  in the Senior  Commitments and the Senior Loans  outstanding
from time to time as if it were a Lender;  provided,  further, that, in the case
of Section 2.12, such  Participant  shall have complied with the requirements of
such Section,  and provided,  further,  that no Participant shall be entitled to
receive any greater  amount  pursuant to any such  Section  than the  transferor
Lender  would  have been  entitled  to  receive  in respect of the amount of the
participation  transferred by such transferor  Lender to such Participant had no
such transfer occurred.

                  (c) Any Lender or Tranche C Lender may, in the ordinary course
of its business or investment  activities and in accordance with Applicable Law,
at any time and from


                                       105

<PAGE>



time to time assign to any Lender,  or any branch or Affiliate  thereof or, with
the consent of the  Administrative  Agent,  the Issuing Bank,  and so long as no
Default  exists  hereunder,  the  Borrower  (which  in each  case  shall  not be
unreasonably  withheld or delayed), to an additional bank, financial institution
or Approved Fund (an  "Assignee")  all or any part of its rights and obligations
under this Agreement and the other Loan Documents  pursuant to an Assignment and
Assumption Agreement. Each Assignment and Assumption Agreement shall be executed
by the applicable Assignee and assigning Lender or Tranche C Lender, as the case
may be (and, in the case of an Assignee  that is not then a Lender,  or a branch
or an Affiliate thereof,  by the Administrative  Agent, the Issuing Bank and, so
long  as no  Default  exists  hereunder,  the  Borrower)  and  delivered  to the
Administrative Agent for its acceptance and recording in the Register;  provided
that,  with respect to each  Lender,  in the case of any such  assignment  to an
additional bank or financial institution, if such assignment is of less than all
of the rights and obligations of the assigning Lender,  the sum of the aggregate
principal  amount of the Loans,  the aggregate amount of the L/C Obligations and
the aggregate  amount of the  Commitments  being assigned shall not be less than
$5,000,000  (or such  lesser  amount as may be  agreed to by the  Administrative
Agent  and  the  Borrower).  Upon  such  execution,   delivery,  acceptance  and
recording,  from and  after  the  effective  date  determined  pursuant  to such
Assignment  and Assumption  Agreement,  (x) the Assignee  thereunder  shall be a
party  hereto and,  to the extent  provided in such  Assignment  and  Assumption
Agreement,  have the rights and obligations of a Lender or Tranche C Lender,  as
applicable,   hereunder  with  Commitments  or  Tranche  C  Credit  Ratios,   as
applicable,  as set forth  therein,  and (y) the  assigning  Lender or Tranche C
Lender  thereunder  shall,  to  the  extent  provided  in  such  Assignment  and
Assumption  Agreement,  be released from its  obligations  under this  Agreement
(and, in the case of an Assignment and Assumption  Agreement covering all of the
remaining  portion of an  assigning  Lender's  or Tranche C Lender's  rights and
obligations  under this  Agreement,  such  assigning  Lender or Tranche C Lender
shall cease to be a party hereto but shall  nonetheless  continue to be entitled
to the benefits of, and subject to the  obligations set forth in, Sections 2.11,
2.13, 2.14, 6.11, 11.11, 12.3 and 13.2 hereof).

                  (d) The Administrative Agent, on behalf of the Borrower, shall
maintain at the address of the Administrative Agent referred to in Section 13.1,
a copy  of  each  Assignment  and  Assumption  Agreement  delivered  to it and a
register (the  "Register") for the recordation of the names and addresses of the
Lenders,  the  Tranche C Lenders  and the  Commitments  and the Tranche C Credit
Ratios,  as  applicable,  of, and principal  amounts of the Loans owing to, each
Lender and each Tranche C Lender from time to time  (whether or not evidenced by
a Note). Any assignment or transfer of all or part of a Loan evidenced by a Note
shall be  registered on the Register only upon  surrender  for  registration  of
assignment or transfer of the Note evidencing  such Loan,  accompanied by a duly
executed  Assignment  and  Assumption  Agreement,  and thereupon one or more new
Notes in the same aggregate  principal  amount shall be issued to the designated
Assignee and the old Note shall be returned by the  Administrative  Agent to the
Borrower marked "canceled".  The entries in the Register shall be conclusive, in
the absence of manifest  error,  and the Borrower and the Credit  Parties  shall
treat each Person  whose name is recorded in the Register as the owner of a Loan
or other  obligation  hereunder  as the owner  thereof for all  purposes of this
Agreement  and the  other  Loan  Documents,  notwithstanding  any  notice to the
contrary.  Any  assignment  of any  Loan or  other  obligation  (whether  or not
evidenced by a Note) hereunder shall be effective only upon appropriate  entries
with respect thereto being made in the Register. The Register shall be available
for  inspection by the Borrower or any Credit Party at any  reasonable  time and
from time to time upon reasonable prior notice.

                  (e) Upon its receipt of an Assignment and Assumption Agreement
executed by an assigning Lender or Tranche C Lender,  as the case may be, and an
Assignee  (and,  in the case of an  Assignee  that is not  then a  Lender  or an
Affiliate thereof, by the Administrative Agent,


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the Issuing  Bank and, so long as no Default  exists  hereunder,  the  Borrower)
together  with  payment  by  the  assignor  to  the  Administrative  Agent  of a
registration  and  processing  fee of $3,500,  the  Administrative  Agent  shall
promptly  accept  such  Assignment  and  Assumption  Agreement  and  record  the
information  contained  therein in the Register.  Such Assignment and Assumption
Agreement and the  assignment  evidenced  thereby  shall only be effective  upon
appropriate entries with respect to the information contained therein being made
in the Register pursuant to Section 13.5(d).

                  (f) The  Borrower  hereby  authorizes  each  Lender  and  each
Tranche  C  Lender  to  disclose  to  any   Participant   or  Assignee  (each  a
"Transferee") and any prospective Transferee, subject to such Person agreeing to
comply  with the  provisions  of Section  13.18 of this  Agreement,  any and all
financial  and  other  information  in  such  Lender's  or  Tranche  C  Lender's
possession  concerning the Borrower and its Affiliates  which has been delivered
to such Lender or Tranche C Lender by or on behalf of the Borrower in connection
with such Lender's or Tranche C Lender's  credit  evaluation of the Borrower and
its Affiliates prior to becoming a party to this Agreement.

                  (g) For  avoidance  of doubt,  the  parties to this  Agreement
acknowledge  that the provisions of this Section 13.5 concerning  assignments of
Loans and Notes relate only to absolute  assignments and that such provisions do
not prohibit any pledge or any assignments  creating  security  interests or the
assignment  of any Loan or Note pursuant to the terms of such pledge or security
interest, including, without limitation, any pledge or assignment by a Lender of
any Loan or Note to any Federal Reserve Bank in accordance with Applicable Law.

                  (h) Any Person  purchasing a participation or an assignment of
Loans from any Lender or Tranche C Lender  shall be  required to  represent  and
warrant that its purchase  shall not constitute a "prohibited  transaction"  (as
defined in Section 5.1(m) hereof).

                  (i) Each  Lender and each  Tranche C Lender  agrees to provide
the  Administrative  Agent and the Borrower  with prompt  written  notice of any
issuance of participations or assignments of its interests hereunder.

                  (j) No  assignment,  participation  or other  transfer  of any
rights by any Lender or any Tranche C Lender  hereunder or under the Notes shall
be affected that would result in any interest  requiring  registration under the
Securities Act, or qualification under any state securities law.

                  (k) No such assignment may be made to any Lender,  any Tranche
C Lender or other financial  institution (x) with respect to which a receiver or
conservator  (including,  without  limitation,  the  Federal  Deposit  Insurance
Corporation or the Office of Thrift  Supervision) has been appointed or (y) that
is not "adequately capitalized" (as such term is defined in Section 131(b)(1)(B)
of the Federal Deposit Insurance Corporation Improvement Act as in effect on the
Agreement Date.

                  (l) Notwithstanding anything to the contrary contained in this
Section 13.5, on and after the date on which the initial  Advance of the Tranche
C Loans is made,  WCAS shall  maintain  Tranche C Loans in an  aggregate  amount
greater than or equal to fifty-one  (51%) of the aggregate  principal  amount of
Tranche C Loans then outstanding.

                  (m) Notwithstanding anything to the contrary contained herein,
any Lender (a "Granting  Lender") may grant to a special purpose funding vehicle
("SPC"),  identified as such in writing from time to time by the Granting Lender
to the  Administrative  Agent and the  Borrower,  the  option to  provide to the
Borrower all or any part of any Advance that such Granting Lender


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would otherwise be obligated to make to the Borrower pursuant to this Agreement;
provided  that,  at the time such  transfer  is made,  one of the  Agents or the
Lenders shall be the liquidity  provider and/or the  administrator  of such SPC;
provided  further that (i) nothing  herein shall  constitute a commitment by any
SPC to make any Advance,  and (ii) if an SPC elects not to exercise  such option
or  otherwise  fails to provide all or any part of such  Advance,  the  Granting
Lender shall be obligated to make such Advance pursuant to the terms hereof. The
making of an Advance by an SPC  hereunder  shall  utilize the  Commitment of the
Granting  Lender to the same  extent,  and as if, such Advance were made by such
Granting Lender. Each party hereto hereby agrees that no SPC shall be liable for
any indemnity or similar payment  obligation under this Agreement (all liability
for  which  shall  remain  with the  Granting  Lender).  In  furtherance  of the
foregoing,  each party hereto hereby agrees (which  agreement  shall survive the
termination of this Agreement)  that, prior to the date that is one year and one
day after  the  payment  in full of all  outstanding  commercial  paper or other
senior Indebtedness of any SPC, it will not institute against, or join any other
person in instituting against, such SPC any Insolvency Proceeding.  In addition,
notwithstanding  anything to the contrary in this Section 13.5,  any SPC may (I)
with notice to, but without the prior  written  consent of, the Borrower and the
Administrative Agent and without paying any processing fee therefor,  assign all
or a portion of its  interests in any Advances to the Granting  Lender or to any
financial  institutions  (consented  to by the Borrower  and the  Administrative
Agent)  providing  liquidity and/or credit support to or for the account of such
SPC to support the funding or  maintenance  of Advances,  and (II) disclose on a
confidential  basis any non-public  information  relating to its Advances to any
rating agency,  commercial paper dealer or provider of any surety,  guarantee or
credit or  liquidity  enhancement  to such SPC. As this  Section  applies to any
particular  SPC, this Section may not be amended  without the written consent of
such SPC.

         Section  13.6  Accounting  Principles.  Except  as  set  forth  in  the
following  sentence,  references  in this  Agreement  to GAAP  shall  be to such
principles as in effect from time to time, and all accounting  terms used herein
without   definition  shall  be  used  as  defined  under  GAAP.  All  financial
calculations  hereunder shall,  unless otherwise  stated,  be determined for the
Borrower on a consolidated basis with its Subsidiaries.

         Section 13.7 Counterparts. This Agreement may be executed in any number
of counterparts,  each of which shall be deemed to be an original,  but all such
separate counterparts shall together constitute but one and the same instrument.
In  proving  this   Agreement  or  any  other  Loan  Document  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.

         Section  13.8  Governing  Law.  THIS  AGREEMENT  AND THE NOTES SHALL BE
CONSTRUED IN  ACCORDANCE  WITH AND GOVERNED BY THE INTERNAL LAWS OF THE STATE OF
NEW YORK  APPLICABLE  TO  AGREEMENTS  MADE AND TO BE  PERFORMED  IN NEW YORK AND
WITHOUT REFERENCE TO THE CONFLICTS OR CHOICE OF LAWS PRINCIPLES THEREOF.

         Section 13.9  Severability.  Any provision of this  Agreement  which is
prohibited or  unenforceable  in any  jurisdiction  shall be  ineffective to the
extent  of  such  prohibition  or  unenforceability   without  invalidating  the
remaining  provisions  hereof in that  jurisdiction or affecting the validity or
enforceability of such provision in any other jurisdiction.



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         Section 13.10     Interest.

         (a) In no event shall the amount of interest  due or payable  hereunder
or under the Notes  exceed the maximum  rate of interest  allowed by  Applicable
Law, and in the event any such payment is inadvertently  made by the Borrower or
inadvertently  received  by any Lender or Tranche C Lender,  as the case may be,
then such  excess sum shall be credited  as a payment of  principal,  unless the
Borrower  shall  notify  the  Administrative  Agent or such  Lender or Tranche C
Lender,  as applicable,  in writing that it elects to have such excess  returned
forthwith.  It is the express  intent  hereof that the  Borrower not pay and the
Lenders and the Tranche C Lenders not  receive,  directly or  indirectly  in any
manner  whatsoever,  interest in excess of that which may legally be paid by the
Borrower under Applicable Law.

         (b)  Notwithstanding  the use by the  Lenders  of the Base Rate and the
Eurodollar  Rate as  reference  rates for the  determination  of interest on the
Senior Loans,  the Lenders shall be under no obligation to obtain funds from any
particular  source in order to charge interest to the Borrower at interest rates
related to such reference rates.

         Section  13.11  Headings.  Headings  used  in  this  Agreement  are for
convenience  only and shall  not in any way  modify or amend any of the terms or
provisions  hereof  nor be used in  connection  with the  interpretation  of any
provision hereof.

         Section  13.12  Amendment  and Waiver.  Neither this  Agreement nor any
other Loan Document (other than Interest Hedge Agreements),  nor any term hereof
or thereof,  may be amended orally,  nor may any provision  hereof or thereof be
waived  orally,  but only by an instrument in writing signed by (or, in the case
of Security  Documents executed by the Collateral Agent signed by the Collateral
Agent and approved by) the Majority Lenders and, in the case of an amendment, by
the Borrower,  except that (a) any increase in the amount of the  Commitments of
any Lender shall require the consent of such Lender; and (b) in the event of (i)
any  delay or  extension  in the  terms of  repayment  or change in the order of
application of repayment of the Loans  provided in Section 2.6 hereof,  (ii) any
reduction in principal,  interest or fees due hereunder or  postponement  of the
payment thereof,  (iii) any release of any substantial portion of the Collateral
for the Senior Loans other than in connection with a Permitted  Disposition,  or
any  failure to take  Collateral  to which the Lenders  are  otherwise  entitled
pursuant  to Section  6.16  hereof,  (iv) any waiver of any  Default  due to the
failure by the Borrower to pay any sum due to any of the Lenders hereunder,  (v)
any release of any Guaranty (or any guarantor  thereunder) of all or any portion
of the Obligations other than in connection with a Permitted  Disposition,  (vi)
any  amendment,  whether direct or indirect,  of this Section  13.12,  or of the
definition of "Majority  Lenders",  or of any portion of Sections 2.9(c),  6.11,
10.4 or Article 12 as they relate to the relative  priority of payment among the
Obligations,  or (vii) any other provision of this Agreement or any of the other
Loan  Documents  specifically  requiring  the consent or approval of each of the
Lenders, any amendment or waiver or consent may be made only by an instrument in
writing  signed  by (or,  in the  case of  Security  Documents  executed  by the
Collateral  Agent,  signed by the Collateral  Agent and approved by) each of the
Lenders and, in the case of an amendment,  by the Borrower. None of the terms of
the  Tranche  C Loans  contained  herein or in any other  Loan  Document  may be
amended orally,  nor may any provision relating to the Tranche C Loans herein or
therein be waived orally, but only by an instrument in writing signed by (or, in
the case of Security  Documents  executed by the Collateral  Agent signed by the
Collateral  Agent and approved  by) the  Required  Tranche C Lenders and, in the
case of an  amendment,  by the  Borrower,  except  that in the  event of (a) the
conversion of the  outstanding  Tranche C Loans into equity,  (b) any release of
the Lien in favor of the  Collateral  Agent,  for the  benefit of the  Tranche C
Lenders,  on the  Tranche C  Pre-Funded  Interest  Account,  or (c) prior to the
second  anniversary of the initial funding of the Tranche C Loans, any amendment
of the  scheduled  interest  payments due on the Tranche C Loans from a calendar
quarterly basis, the approval of all Tranche C



                                       109

<PAGE>



Lenders shall be required.  In the event that the Senior Credit Parties agree to
waive any  Default  or Event of  Default  arising  in  respect of Article 6 or 8
hereof,  or amend any provision of Article 6 or 8 of this  Agreement to cure any
such Default or Event of Default,  the Tranche C Lenders shall be deemed to have
waived,  without any further action on their part, any  corresponding  Tranche C
Default,  and to have agreed,  without any further  action on their part, to any
such  amendment.  Any  amendment to any  provision  hereunder,  or any waiver or
consent with respect thereto, governing the rights,  obligations, or liabilities
of (i) the Administrative  Agent in its capacity as such, may be made only by an
instrument  in  writing  signed by the  Administrative  Agent and by each of the
Lenders,  or (ii) the Tranche C Lenders in their capacities as such, may be made
only by an instrument in writing  signed by the Tranche C Lenders and by each of
the Arrangers and each of the Lenders.

         Section 13.13 Entire Agreement.  Except as otherwise expressly provided
herein,  this Agreement and the other documents described or contemplated herein
embody the entire  agreement  and  understanding  among the  parties  hereto and
thereto and supersede all prior  agreements and  understandings  relating to the
subject matter hereof and thereof.

         Section 13.14 Other Relationships. No relationship created hereunder or
under any other Loan Document  shall in any way affect the ability of any Credit
Party or any of their respective  Affiliates to enter into or maintain  business
relationships   with  the  Borrower  or  any  of  its   Affiliates   beyond  the
relationships  specifically  contemplated  by this  Agreement and the other Loan
Documents.

         Section 13.15 Loan  Documents.  All  references to this Agreement or to
any other Loan Document whether herein or in any other Loan Document shall refer
to this  Agreement  or such  other  Loan  Document  as the same may be  amended,
restated, supplemented or otherwise modified from time to time.

         Section  13.16  Reliance  on and  Survival of Various  Provisions.  All
covenants, agreements, statements, representations and warranties made herein or
in any  certificate  delivered  pursuant hereto (i) shall be deemed to have been
relied upon by each of the Agents, each of the Lenders and each of the Tranche C
Lenders notwithstanding any investigation  heretofore or hereafter made by them,
and (ii)  shall  survive  the  execution  and  delivery  of the  Notes and shall
continue in full force and effect so long as any Note is outstanding and unpaid.
Any right to indemnification hereunder,  including,  without limitation,  rights
pursuant to Sections 2.11, 2.13, 2.14, 6.11, 11.11, 12.3 and 13.2 hereof,  shall
survive the termination of this Agreement and the payment and performance of all
of the Obligations.

         Section 13.17 Senior Debt. The  Indebtedness of the Borrower  evidenced
by the Notes is secured by the Security Documents and is intended by the parties
hereto to be in parity with the Interest Hedge Agreements in effect from time to
time  between the  Borrower and any Lender and senior in right of payment to all
other Borrower Debt.

         Section 13.18 Confidentiality.  All agreements,  instruments, documents
and other  information  received  pursuant to this  Agreement  or any other Loan
Document  by the  Credit  Parties  shall  be held in  confidence  by the  Credit
Parties,  except for disclosures  made (a) in connection with  assignments of or
participations  in the Loans made pursuant to Section 13.5 hereof (provided that
such assignees or participants  shall agree in writing to keep such  information
confidential as provided herein),  (b) as otherwise  required to be disclosed by
banking  regulations,  process of law or other  Applicable Law, or to government
regulators, (c) of information received by a Credit Party without restriction as
to its disclosure or use from a Person who, to such Credit Party's  knowledge or
reasonable  belief,  was  not  prohibited  from  disclosing  it by any  duty  of
confidentiality, (d) in connection with litigation arising from this


                                       110

<PAGE>



Agreement or any other Loan Document to which a Credit Party is a party,  (v) of
information  which is or has become  public  (other  than  through  unauthorized
disclosure by any Credit Party), (vi) to the attorneys,  accountants,  and other
expert  consultants  (including rating agencies) for any Credit Party (who shall
be requested to  similarly  hold such  information  in  confidence)  or (vii) as
otherwise permitted hereunder.


                                   ARTICLE 14

                              Waiver of Jury Trial

         Section 14.1 Waiver of Jury Trial. HOLDCO AND THE BORROWER,  FOR ITSELF
AND ON BEHALF OF EACH OF ITS SUBSIDIARIES, AND EACH OF THE CREDIT PARTIES HEREBY
WAIVE THE RIGHT TO A TRIAL BY JURY IN ANY COURT AND IN ANY ACTION OR  PROCEEDING
OF ANY TYPE IN WHICH HOLDCO, THE BORROWER, ANY OF THE BORROWER'S SUBSIDIARIES OR
ANY OF THE CREDIT PARTIES, OR ANY OF THEIR RESPECTIVE  SUCCESSORS OR ASSIGNS, IS
A PARTY, AS TO ALL MATTERS AND THINGS ARISING DIRECTLY OR INDIRECTLY OUT OF THIS
AGREEMENT OR ANY OF THE OTHER LOAN DOCUMENTS AND THE RELATIONS AMONG THE PARTIES
LISTED IN THIS SECTION 14.1.


                  [Remainder of page intentionally left blank.]



                                       111

<PAGE>



         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and delivered as of the date first appearing above.


BORROWER:                               SPECTRASITE COMMUNICATIONS, INC.


                                        By:  /s/ David P. Tomick
                                        Name: David P. Tomick
                                        Title: Executive Vice President, Chief
  [SEAL]                                       Financial Officer and Secretary



                                        Attest: /s/ Cathy M. Antee
                                        Name: Cathy M. Antee
                                        Title: Controller and Assistant
                                                Secretary


GUARANTOR:                              SPECTRASITE HOLDINGS, INC.


                                        By:  /s/ David P. Tomick
                                        Name: David P. Tomick
                                        Title: Executive Vice President, Chief
 [SEAL]                                        Financial Officer and Secretary



                                        Attest:   /s/ Cathy M. Antee
                                        Name: Cathy M. Antee
                                        Title: Controller and Assistant
                                               Secretary


ADMINISTRATIVE
AGENT:                                  CANADIAN IMPERIAL BANK OF COMMERCE


                                        By:  /s/ Deborah D. Strek
                                        Name: Deborah D. Strek
                                        Title:  Managing Director of CIBC
                                                Oppenheimer Corp. as Agent


ARRANGERS:                              CIBC OPPENHEIMER CORP.


                                        By:  /s/ Deborah D. Strek
                                        Name: Deborah D. Strek
                                        Title: Managing Director


                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                           CREDIT SUISSE FIRST BOSTON


                                        Name:   Kristin Lepri
                                        Title:     Associate


                                        By:  /s/ Bill O'Daly
                                        Name:   Bill O'Daly
                                        Title:     Vice President


COLLATERAL AGENT:                       CANADIAN IMPERIAL BANK OF COMMERCE



                                        By:     /s/ Deborah D. Strek
                                        Name: Deborah D. Strek
                                        Title:  Managing Director of CIBC
                                                Oppenheimer Corp. as Agent

SYNDICATION AGENT:                      CREDIT SUISSE FIRST BOSTON


                                        By:  /s/ Kristin Lepri
                                        Name:   Kristin Lepri
                                        Title:     Associate


                                        Name:   Bill O'Daly
                                        Title:     Vice President


MANAGING AGENTS:                        BANK OF MONTREAL, CHICAGO BRANCH


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


                             THE BANK OF NOVA SCOTIA


                                        By:  /s/ P.A. Weissenberger
                                        Name: P.A. Weissenberger
                                        Title:   Authorized Signatory

                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        BANKBOSTON, N.A.


                                        By:  /s/ Lenny Mason
                                        Name:   Lenny Mason
                                        Title:     Director


                                        DRESDNER BANK AG, NEW YORK AND GRAND
                                        CAYMAN BRANCHES


                                        By:  /s/ William E. Lambert
                                        Name:   William E. Lambert
                                        Title:     Vice President


                                        By:  /s/ Constance Loosemore
                                        Name:   Constance Loosemore
                                        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/ Stender E. Sweeney
                                        Name: Stender E. Sweeney
                                        Title:   Assistant Vice President


CO-AGENT:                               CREDIT LYONNAIS NEW YORK BRANCH


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



                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



LENDERS:                                CIBC INC.


                                        By:  /s/ Deborah D. Strek

                                        Title:  Managing Director of CIBC
                                                Oppenheimer Corp. as Agent









                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]





<PAGE>



                           CREDIT SUISSE FIRST BOSTON


                                        By:  /s/ Kristin Lepri
                                        Name:   Kristin Lepri
                                        Title:     Associate


                                        By:  /s/ Bill O'Daly
                                        Name: Bill O'Daly
                                        Title:   Vice President










                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        BANK OF MONTREAL, CHICAGO BRANCH


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










                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                             THE BANK OF NOVA SCOTIA


                                        By:  /s/ P.A. Weissenberger
                                        Name:   P.A. Weissenberger
                                        Title:     Authorized Signatory











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        BANKBOSTON, N.A.


                                        By:  /s/ Lenny Mason
                                        Name:  Lenny Mason
                                        Title:    Director











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]





<PAGE>



                                        DRESDNER BANK AG, NEW YORK AND GRAND
                                        CAYMAN BRANCHES


                                        By:  /s/ William E. Lambert
                                        Name:   William E. Lambert
                                        Title:     Vice President


                                        By:  /s/ Constance Loosemore
                                        Name:   Constance Loosemore
                                        Title:     Assistant Vice President













                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        TORONTO DOMINION (TEXAS), INC.


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













                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        UNION BANK OF CALIFORNIA, N.A.


                                        By:  /s/ Stender E. Sweeney
                                        Name: Stender E. Sweeney
                                        Title:   Assistant Vice President











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        CREDIT LYONNAIS NEW YORK BRANCH


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













                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        THE BANK OF NEW YORK


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












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        BDC FINANCE LLC


                                        By:  /s/ James Zenn
                                        Name: James Zenn
                                        Title:   Director











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        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













                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        CANADIAN IMPERIAL BANK OF COMMERCE


                                        By:  /s/ Deborah D. Strek
                                        Name: Deborah D. Strek
                                        Title:   Managing Director of CIBC
                                                 Oppenheimer Corp.,as agent












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        THE CIT GROUP/EQUIPMENT FINANCING, INC.


                                        By:  /s/ J.E. Palmer
                                        Name:   J.E. Palmer
                                        Title:     Assistant Vice President













                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                        CYPRESSTREE INVESTMENT FUND, LLC

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


                                        By:  /s/ Peter K. Merrill
                                        Name:   Peter K. Merrill
                                        Title:     Managing Director












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        NORTHAMERICAN SENIOR FLOATING RATE FUND

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


                                        By:  /s/ Peter K. Merrill
                                        Name:   Peter K. Merrill
                                        Title:     Managing Director











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]





<PAGE>



                                        CYPRESSTREE INVESTMENT MANAGEMENT
                                        COMPANY, INC.

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


                                        By:  /s/ Peter K. Merrill
                                        Name:   Peter K. Merrill
                                        Title:     Managing Director











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        KZH CYPRESSTREE-1 LLC


                                        By:  /s/ Virginia Conway
                                        Name:   Virginia Conway
                                        Title:     Authorized Agent












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                            FREMONT INVESTMENT & LOAN


                                        By:  /s/ Randolph M. Ross
                                        Name: Randolph M. Ross
                                        Title:    Vice President












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        HELLER FINANCIAL, INC.


                                        By:  /s/ Sheila Weimer
                                        Name:   Sheila Weimer
                                        Title:     Vice President












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]


<PAGE>



                                        Morgan Guaranty Trust Company of New
                                        York as Trustee
                                        for a COMMINGLED PENSION TRUST FUND
                                        (Corporate Bond Special Situations Fund)


                                        By:  /s/ David T. Ellis
                                        Name:   David T. Ellis
                                        Title:     Vice President











                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        Morgan Guaranty Trust Company of New
                                        York as Trustee
                                        for a COMINGLED PENSION TRUST FUND
                                        (MGT High Yield Fund)


                                        By:  /s/ David T. Ellis
                                        Name:   David T. Ellis
                                        Title:     Vice President












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        MERRILL LYNCH SENIOR FLOATING RATE
                                        FUND, INC.


                                        By:  /s/ Joseph Matteo
                                        Name:   Joseph Matteo
                                        Title:     Authorized Signatory











                                     [SIGNATURES CONTINUED ON FOLLOWING PAGE]



CREDIT AGREEMENT

<PAGE>



                                        KZH SHOSHONE LLC


                                        By:  /s/ Virginia Conway
                                        Name:   Virginia Conway
                                        Title:     Authorized Agent











                                     [SIGNATURES CONTINUED ON FOLLOWING PAGE]



CREDIT AGREEMENT

<PAGE>



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


                                        By:  /s/ Mike King
                                        Name:   Mike King
                                        Title:     Vice President












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]



<PAGE>



                                        BankBoston, N.A., as Trust Administrator
                                          for
                                        LONGLANE MASTER TRUST IV


                                        By:  /s/ Renee A. Ross
                                        Name:   Renee A. Ross
                                        Title:     Managing Director
                                                   Credit Derivatives












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        GALAXY CLO 1999-1, LTD.

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


                                        By:  /s/ Sabur Moini
                                        Name:   Sabur Moini
                                        Title:     Authorized Agent












                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]




<PAGE>



                                        BANKERS TRUST COMPANY



                                        By:  /s/ Annemarie Reilly-Papazoglou
                                        Name: Annemarie Reilly-Papazoglou
                                        Title:   Vice President




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