NICOR INC
10-K, 2000-03-20
NATURAL GAS DISTRIBUTION
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                                        UNITED STATES
                              SECURITIES AND EXCHANGE COMMISSION
                                    Washington, D.C. 20549

                                          FORM 10-K

     [X]  Annual  Report  Pursuant  to  Section  13 or 15(d)  of the  Securities
          Exchange Act of 1934

                         For the fiscal year ended December 31, 1999

                                              or

     [ ]  Transition  Report  Pursuant to Section 13 or 15(d) of the  Securities
          Exchange Act of 1934

<TABLE>
<CAPTION>

                                                                      I.R.S Employer
 Commission File          Registrant, State of Incorporation,         Identification
      Number                 Address and Telephone Number                 Number
- -------------------   --------------------------------------------   -----------------

<S>   <C>                                                               <C>
      1-7297          Nicor Inc.                                        36-2855175
                      (An Illinois Corporation)
                      1844 Ferry Road
                      Naperville, Illinois 60563-9600
                      (630) 305-9500
</TABLE>

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

                                                       Name of each exchange on
               Title of each class                          which  registered
    Common  Stock,  par value $2.50 per share,         New York Stock Exchange
    including Preference Stock purchase rights         Chicago Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:  None

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

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

As of  February  29,  2000,  46,707,099  common  shares  were  outstanding.  The
aggregate  market  value of  voting  securities  held by  non-affiliates  of the
registrant was approximately $1.4 billion.

                             DOCUMENTS INCORPORATED BY REFERENCE

Portions of the company's 2000 Annual Meeting Definitive Proxy Statement,  dated
March 8, 2000, are incorporated by reference into Part III.



<PAGE>


Nicor Inc.                                                                Page i

Table of Contents

  Item No.

      Part I
 1.   Business ............................................................  1
 2.   Properties ..........................................................  5
 3.   Legal Proceedings....................................................  5
 4.   Submission of Matters to a Vote of Security Holders..................  5
      Executive Officers of the Registrant.................................  6

      Part II
 5.   Market for Registrant's Common Equity and Related Stockholder Matters  7
 6.   Selected Financial Data .............................................  8
 7.   Management's Discussion and Analysis of Financial
        Condition and Results of Operations................................  9
 7A.  Quantitative and Qualitative Disclosures about Market Risk........... 18
 8.   Financial Statements and Supplementary Data ......................... 19
 9.   Changes in and Disagreements with Accountants on
        Accounting and Financial Disclosure................................ 35

      Part III
 10.  Directors and Executive Officers of the Registrant................... 35
 11.  Executive Compensation............................................... 35
 12.  Security Ownership of Certain Beneficial Owners and Management....... 35
 13.  Certain Relationships and Related Transactions....................... 35

      Part IV
 14.  Exhibits, Financial Statement Schedules, and Reports on Form 8-K..... 36
      Signatures........................................................... 38
      Exhibit Index........................................................ 39



Glossary

Degree day........The  extent to which the daily average  temperature
                  falls below 65 degrees  Fahrenheit.  Normal  weather for Nicor
                  Gas' service territory is about 6,100 degree days.
FERC..............Federal Energy Regulatory Commission, the agency that
                  regulates the interstate transportation of natural gas, oil
                  and electricity.
HVAC..............Heating, ventilating and air conditioning.
ICC...............Illinois Commerce Commission, the agency that regulates
                  investor-owned Illinois utilities.
Mcf, MMcf, Bcf ...Thousand cubic feet, million cubic feet, billion cubic feet.
PBR...............Performance-based rate, a plan that provides economic
                  incentives based on performance.
TEU...............Twenty-foot equivalent unit, a measure of volume in
                  containerized shipping equal to one 20-foot-long container.



<PAGE>



Nicor Inc.                                                                Page 1

PART I

Item 1.    Business

Nicor Inc.  (Nicor),  incorporated in 1976, is a holding company.  Its principal
subsidiaries  are  Northern  Illinois Gas Company  (doing  business as Nicor Gas
Company),  one of the nation's largest distributors of natural gas, and Tropical
Shipping, a leading transporter of containerized  freight in the Caribbean.  Gas
distribution is Nicor's primary business,  representing approximately 90 percent
of  consolidated   operating   income  and  assets.   Nicor  also  owns  several
energy-related  subsidiaries  and is a partner in Nicor  Energy,  a provider  of
unregulated  energy  products  and  services.   Nicor  had  approximately  3,400
employees at year-end 1999.

Financial information on Nicor's major business segments is included in Business
Segment and  Geographic  Information  beginning on page 31.  Certain  terms used
herein are defined in the glossary on page i.


GAS DISTRIBUTION

General

Nicor Gas, a regulated  natural gas distribution  utility,  serves more than 1.9
million customers,  in a service territory that encompasses most of the northern
third  of  Illinois,  excluding  the  city of  Chicago.  The  company's  service
territory  is  diverse  and has grown  steadily  over the years,  providing  the
company with a  well-balanced  mix of  residential,  commercial  and  industrial
customers.  In 1999,  residential  customers  accounted  for about 41 percent of
natural gas deliveries,  while commercial and industrial customers accounted for
about 24 percent  and 35  percent,  respectively.  Nicor Gas' large  residential
customer base provides  relative  stability  during weak  economic  periods.  In
addition,  the  company's  industrial  and  commercial  customer  base  is  well
diversified,  lessening the impact of industry-specific economic swings. See Gas
Distribution  Statistics  on  page 15 for  operating  revenues,  deliveries  and
customers by customer classification.

Gas  deliveries  are seasonal  since about  one-half are used for space heating.
Typically,  about 70 percent  of  deliveries  and  revenues  occur from  October
through  March.  Fluctuations  in  weather  can  have a  significant  impact  on
year-to-year   comparisons  of  operating  income  and  cash  flow.  To  provide
protection  from the  financial  impact of  unusually  warm  weather,  Nicor Gas
purchased a weather  insurance  policy which will protect 2000 earnings and cash
flow if weather for the year is more than 6.5 percent warmer than normal.

Nicor Gas maintains franchise agreements with most of the communities it serves,
allowing it to construct,  operate and maintain distribution facilities in those
communities.  Franchise  agreement terms range up to 50 years.  Currently,  less
than 5 percent of the agreements will expire within five years.  The company has
approximately 2,300 employees.

Customer Services

In  addition  to  gas  sales  to  all  customer  classes,   Nicor  Gas  provides
transportation service to commercial and industrial customers who purchase their
own gas supplies.  Beginning in 1999, the company's Customer Select(R) voluntary
pilot program  allowed  residential  customers in certain  communities to choose
their  natural gas  supplier.  Nicor Gas supports  full  customer  choice and is
presently evaluating providing all customers the ability to choose their natural
gas supplier. Additional information on the program is

<PAGE>


Nicor Inc.                                                                Page 2

Item 1.    Business (continued)

presented  in  Factors  Affecting  Business  Performance  beginning  on page 13.
Transportation  customers  have options  that  include the use of the  company's
storage  system,  the choice of individual or group billing,  and the ability to
choose varying supply backup levels and service options.  The company receives a
margin generally  comparable to gas sales for  transportation  service with full
supply backup.

In recent years, Nicor Gas has been pursuing several nontraditional  activities.
These activities  include finding innovative ways to utilize its physical assets
by providing natural gas storage and transmission-related services to marketers,
other gas distribution companies and electric power generation facilities.

Sources of Gas Supply

Nicor Gas purchases gas supplies on a deregulated  basis directly from producers
and  marketers.  Pipeline  transportation  and  purchased  storage  services are
contracted  for at rates  regulated  by the FERC.  Firm  pipeline  capacity  and
purchased  storage  services held by the company that are temporarily not needed
can be released in the secondary  market under  FERC-mandated  capacity  release
provisions,  with  proceeds  reducing  the  company's  cost  of gas  charged  to
customers.

The company's peak day requirements are met through utilization of company-owned
storage facilities, firm pipeline capacity, purchased storage services and other
supply  arrangements.  Nicor Gas has been able to obtain sufficient  supplies of
natural gas to meet  customer  requirements.  The company  believes  natural gas
supply availability will be sufficient to meet market demands in the foreseeable
future.

Gas supply. Nicor Gas maintains a diversified portfolio of gas supply contracts.
Firm gas  supply  contracts  are  diversified  by  supplier,  producing  region,
quantity and available  transportation.  Contract  pricing is generally  tied to
published  price  indices  so as  to  approximate  current  market  prices.  The
contracts  also  generally  provide for the payment of fixed  demand  charges to
ensure  the  availability  of  supplies  on any  given  day  and  are  generally
negotiated annually.

The company also purchases gas supplies on the spot market to fulfill its supply
requirements  or to take  advantage of favorable  short-term  pricing.  Spot gas
purchases  accounted for about one-half of the company's  total gas purchases in
the last three years.

Customers  served under the company's  transportation  service tariffs  purchase
their own gas supplies.  About one-half of the gas that the company delivered in
1999 was  purchased by  transportation  customers  directly  from  producers and
marketers rather than from the company.

Pipeline  transportation.  Nicor Gas is  directly  connected  to six  interstate
pipelines  which  provide  access to most of the  major  natural  gas  producing
regions in North America.  The company's primary firm  transportation  contracts
are with:  Natural Gas  Pipeline  Company of America,  which  accounts for about
two-thirds of the contracted  capacity,  Midwestern Gas Transmission Company and
Northern Natural Gas Company.  Nearly all of the contracted capacity will expire
by 2004.

Storage.  Nicor Gas owns and operates seven underground gas storage  facilities.
This storage system is one of the largest in the gas  distribution  industry and
is designed to meet about 55 percent of the company's  peak day  deliveries  and
approximately  30 percent of its normal winter  deliveries.  On an annual basis,
about 130 Bcf of gas is cycled through the company's storage fields. In addition
to the  company-owned  facilities,  Nicor Gas purchases  about 40 Bcf of storage
service. Storage provides supply


<PAGE>


Nicor Inc.                                                                Page 3

Item 1.    Business (continued)

flexibility,  improves  reliability  of  deliveries  and allows  the  company to
maintain rates that are among the lowest in the nation.

Competition/Demand

Nicor Gas is one of the largest utility energy suppliers in Illinois, delivering
about one-third of all utility energy consumed in the state. About 97 percent of
all single-family  homes in Nicor Gas' service territory are heated with natural
gas.  The  company's  gas services  compete with other forms of energy,  such as
electricity  and oil, based on such factors as price,  service and  reliability.
Significant factors that impact demand for natural gas include weather, economic
conditions and the price of gas relative to competitive fuels.

The energy  industry  has  undergone  fundamental  changes over the past several
years.  In  1997,  Illinois  adopted   legislation   directing  the  process  of
deregulating  the  state's  electric  utility  industry.   Although  Nicor  Gas'
traditional  pricing advantage compared to electricity may decrease as the price
of electricity declines,  the company expects to maintain a pricing advantage in
the foreseeable future.

Additional  information  on  competition  and  demand is  presented  in  Factors
Affecting Business Performance beginning on page 13.

Regulation

Nicor Gas is regulated by the ICC, which  establishes  the rules and regulations
governing utility rates and services in Illinois.  Rates are generally  designed
to allow the company to recover its costs and provide an  opportunity  to earn a
fair  return for its  investors.  Changes in the  regulatory  environment  could
affect the longer-term performance of Nicor Gas.

The cost of gas the company  purchases  for  customers  is  recovered  through a
monthly gas supply  charge,  which  accounts for  approximately  70 percent of a
typical residential  customer's annual bill. The company's cost of gas is passed
on to the customer without markup.

On January 1, 2000, Nicor Gas' performance-based rate (PBR) plan for natural gas
costs went into effect. Under the PBR, Nicor Gas' total gas supply costs will be
compared to a benchmark tied to a market index.  Savings and losses  relative to
the benchmark  will be shared equally with  customers.  At the end of two years,
the plan will be subject to ICC review.  Additional  information  on the plan is
presented in Factors Affecting Business Performance beginning on page 13.

Customer  Select,  a voluntary  pilot program that offers  customers a choice of
natural gas  suppliers,  is in its third  year.  Additional  information  on the
program is presented in Factors Affecting Business Performance beginning on page
13.

Properties

The gas  distribution,  transmission  and storage system includes  approximately
30,000 miles of steel, plastic and cast iron main; approximately 27,000 miles of
steel,  plastic/aluminum  composite,  plastic and copper service pipe connecting
the mains to customers' premises; and seven underground storage fields.

<PAGE>


Nicor Inc.                                                                Page 4

Item 1.    Business (concluded)

Other properties include buildings,  land, motor vehicles,  meters,  regulators,
compressors,   construction   equipment,   tools,   communication  and  computer
equipment, software and office equipment.

The principal real properties are held under easements,  permits, licenses or in
fee. Land in fee is owned for  essentially  all  administrative  offices and for
certain  transmission  mains and underground  storage fields.  Substantially all
properties are subject to the lien of the indenture securing the company's first
mortgage bonds.


SHIPPING

Tropical  Shipping is one of the  largest  containerized  cargo  carriers in the
Caribbean,   a  region   characterized  by  modest  market  growth  and  intense
competition. Tropical Shipping's financial results can be significantly affected
by general  economic  conditions  in the United  States and the  Caribbean.  The
company's  shipments  consist  primarily  of  southbound  cargo such as building
materials,  food  and  other  necessities  for  developers,   manufacturers  and
residents in the Caribbean,  as well as  tourist-related  shipments intended for
use in hotels  and  resorts,  and on  cruise  ships.  The  balance  of  Tropical
Shipping's cargo consists of northbound  shipments of agricultural  products and
apparel, and interisland shipments. The company also provides additional related
services including inland transportation and cargo insurance.

Tropical Shipping's owned fleet consists of 13 vessels with a container capacity
totaling  approximately  3,100  TEUs.  In 1999,  Tropical  Shipping  ordered the
construction of two vessels to replace chartered capacity and to support growth.
In addition, the company owns containers,  container-handling equipment, chassis
and other equipment.  Real property,  a significant  portion of which is leased,
includes office buildings,  cargo handling  facilities and warehouses located in
the United States, as well as in some of the ports served.

Additional  information  about  Tropical  Shipping's  business is  presented  in
Factors Affecting Business Performance beginning on page 13.


OTHER NICOR VENTURES

Nicor is continually  looking for opportunities to provide products and services
that will meet customers'  energy needs.  Additional  information  pertaining to
these ventures is presented in Factors Affecting Business Performance  beginning
on page 13.


ENVIRONMENTAL MATTERS

For information on environmental matters, see Contingencies on page 34.




<PAGE>


Nicor Inc.                                                                Page 5

Item 2.    Properties

Information   with  respect  to  this  item  concerning   Nicor  and  its  major
subsidiaries'  properties is included in Item 1, Business,  beginning on page 1,
and is incorporated herein by reference. These properties are suitable, adequate
and utilized in the company's operations.

Item 3.    Legal Proceedings

On December 20, 1995,  Nicor Gas filed suit in the Circuit  Court of Cook County
against certain  insurance  carriers seeking  recovery of environmental  cleanup
costs of certain former  manufactured  gas plant sites.  Nicor Gas has reached a
settlement with one of the insurance carriers. On February 10, 2000, the Circuit
Court of Cook County dismissed the company's case on summary  judgement  motions
by certain defendants. The company plans to appeal. For further information, see
Contingencies on page 34, which is incorporated herein by reference.

Item 4.    Submission of Matters to a Vote of Security Holders

None.




<PAGE>


Nicor Inc.                                                                Page 6

Executive Officers of the Registrant

Executive  officers  of  the  company  are  elected  annually  by the  Board  of
Directors.

       Name             Age              Current Position and Background
- --------------------   -----     -----------------------------------------------

Thomas L. Fisher        55       Chairman, Nicor and Nicor Gas (since 1996);
                                 Chief Executive Officer, Nicor (since 1995)
                                 and Nicor Gas (since 1988); and President,
                                 Nicor (since 1994) and Nicor Gas (since
                                 1988).

Philip S. Cali          52       Executive Vice President Operations, Nicor
                                 and Nicor Gas (since 1999); Senior Vice
                                 President Operations, Nicor Gas (1995-1999);
                                 and Vice President Engineering, Codes and
                                 Environmental Affairs, Nicor Gas (1994-1995).

Kathleen L. Halloran    47       Executive Vice President Finance and
                                 Administration, Nicor and Nicor Gas (since
                                 1999); Senior Vice President Administration,
                                 Nicor Gas (1998-1999); Senior Vice President
                                 Information Services, Rates and Human
                                 Resources, Nicor Gas (1996-1998); Vice
                                 President Information Services, Rates and
                                 Human Resources, Nicor Gas (1995-1996); and
                                 Vice President Information Services and
                                 Rates, Nicor Gas (1994-1995).

David L. Cyranoski      56       Senior Vice President, Nicor and Nicor Gas
                                 (since 1995); Secretary, Nicor (since 1992)
                                 and Nicor Gas (since 1993); Treasurer, Nicor
                                 and Nicor Gas (since 1998); Controller, Nicor
                                 (since 1999, 1992-1998) and Nicor Gas (since
                                 1999, 1984-1998); and Vice President, Nicor
                                 (1992-1995) and Nicor Gas (1984-1995).

George M. Behrens       44       Vice President Administration, Nicor Gas
                                 (since 1999); Vice President and Controller,
                                 Nicor and Nicor Gas (1998-1999); Vice
                                 President Accounting, Nicor Gas (1996-1998);
                                 and Vice President and Treasurer, Tropical
                                 Shipping (1991-1996).

Claudia J. Colalillo    50       Vice President Human Resources and Corporate
                                 Communications, Nicor and Nicor Gas (since
                                 1998); Senior Vice President Organizational
                                 Development, May & Speh, Inc. (provider of
                                 technology-based information management
                                 services) (1995-1998); and Vice President
                                 Human Resources, May & Speh, Inc. (1992-1995).



<PAGE>


Nicor Inc.                                                                Page 7

Executive Officers of the Registrant (concluded)

       Name              Age              Current Position and Background
- ---------------------   -----     ----------------------------------------------

Daniel R. Dodge          46       Vice President Business Development, Nicor
                                  and Nicor Gas (since 1998); and Vice
                                  President Business and Asset Development,
                                  MidCon Corp. (diversified energy company with
                                  gas pipeline and power marketing operations)
                                  (1994-1998).


PART II

Item 5.    Market for Registrant's Common Equity and Related Stockholder Matters

Nicor common  stock is listed on the New York and Chicago  Stock  Exchanges.  At
February  29, 2000,  there were  approximately  31,500  common  stockholders  of
record. On March 16, 2000, the Board of Directors  declared a quarterly dividend
on  its  common  stock  of  41.5  cents  per  share,  payable  May 1,  2000,  to
stockholders of record March 31, 2000. This payment represents an annual rate of
$1.66 per share.

                           Stock price              Dividends
                  -------------------------------
    Quarter            High            Low          declared
- ----------------  --------------- ---------------   ----------

1999
    First         $     42-15/16  $     34-11/16    $     .39
    Second              39-1/2          34-1/8            .39
    Third               40              35-11/16          .39
    Fourth              39-3/8          31-3/16           .39

1998
    First         $     43-3/8    $     38-7/8      $     .37
    Second              43-3/16         37-1/2            .37
    Third               41-15/16        37-1/8            .37
    Fourth              44-7/16         40-3/8            .37


<PAGE>


Nicor Inc.                                                              Page 8
- -------------------------------------------------------------------------------

Item 6.  Selected Financial Data

                                          Year ended December 31
                            ---------------------------------------------------
(millions, except per
    share data)                1999       1998      1997       1996      1995
                            ---------  --------- ---------  --------- ---------

Operating revenues         $ 1,615.2  $ 1,465.1 $ 1,992.6  $ 1,850.7 $ 1,480.1

Operating income             $ 212.0    $ 208.6   $ 229.8    $ 233.1   $ 189.8

Net income
   Continuing operations     $ 124.4    $ 116.4   $ 127.9    $ 121.2    $ 99.8
   Discontinued operations         -          -         -       15.0         -
                            ---------  --------- ---------  --------- ---------
                             $ 124.4    $ 116.4   $ 127.9    $ 136.2    $ 99.8
                            =========  ========= =========  ========= =========

Basic earnings per common
  share
   Continuing operations      $ 2.63     $ 2.43    $ 2.62     $ 2.42    $ 1.96
   Discontinued operations         -          -         -        .30         -
                            ---------  --------- ---------  --------- ---------
                              $ 2.63     $ 2.43    $ 2.62     $ 2.72    $ 1.96
                            =========  ========= =========  ========= =========

Diluted earnings per common
  share
   Continuing operations      $ 2.62     $ 2.42    $ 2.61     $ 2.41    $ 1.96
   Discontinued operations         -          -         -        .30         -
                            ---------  --------- ---------  --------- ---------
                              $ 2.62     $ 2.42    $ 2.61     $ 2.71    $ 1.96
                            =========  ========= =========  ========= =========

Dividends declared per
   common share               $ 1.56     $ 1.48    $ 1.40     $ 1.32    $ 1.28

Property, plant and
  equipment
   Gross                   $ 3,483.1  $ 3,379.8 $ 3,267.7  $ 3,192.7 $ 3,110.4
   Net                       1,735.2    1,731.8   1,735.8    1,771.9   1,779.3

Total assets               $ 2,451.8  $ 2,364.6 $ 2,394.6  $ 2,438.6 $ 2,259.1

Capitalization
   Long-term debt, net of
       current maturities    $ 436.1    $ 557.3   $ 550.2    $ 518.0   $ 468.7
   Redeemable preferred stock    6.3        6.3       6.4        7.5       8.9
   Common equity               787.7      759.0     744.0      729.6     687.6
                           ---------  --------- ---------  --------- ---------
                           $ 1,230.1  $ 1,322.6 $ 1,300.6  $ 1,255.1 $ 1,165.2
                           =========  ========= =========  ========= =========





Nicor Inc.                                                                Page 9

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations

The purpose of this financial review is to explain changes in Nicor's  operating
results  and  financial  condition  from 1997 to 1999,  and to discuss  business
trends and uncertainties that might affect Nicor.  Certain terms used herein are
defined in the glossary on page i.


SUMMARY

Nicor's two major business segments are gas distribution and shipping,  with gas
distribution  representing  approximately  90 percent of consolidated  operating
income and assets.

Nicor's 1999 diluted  earnings per common share  increased to $2.62 from $2.42 a
year ago, due primarily to a positive  contribution from nonoperating  items and
improved gas distribution  operating results. Net income increased $8 million to
$124.4 million.  Nicor's 1998 diluted earnings per common share were $2.42, down
from $2.61 in 1997, as lower operating  results in the gas distribution  segment
were partially offset by improved operating results in the shipping segment. Net
income of $116.4 million decreased $11.5 million from 1997. Per share results in
both years also benefited from the company's common stock repurchase programs.

Operating income. Operating income (loss) by major business segment is presented
below:

(millions)                                1999         1998         1997
                                       ------------ ------------ ------------
Gas distribution                       $    191.7   $    185.5   $    210.1
Shipping                                     22.5         27.6         25.3
Corporate and other                          (2.2)        (4.5)        (5.6)
                                       ------------ ------------ ------------
                                       $    212.0   $    208.6   $    229.8
                                       ============ ============ ============

The  following  summarizes  operating  income  comparisons  for  major  business
segments:

o   Gas  distribution  operating  income  increased  $6.2 million in 1999 due to
    higher  deliveries  related  primarily  to 9  percent  colder  weather.  The
    positive  impact of higher  deliveries  was  partially  offset by  increased
    operating  and  maintenance   expenses  and   depreciation.   In  1998,  gas
    distribution  operating  income decreased $24.6 million due to the impact of
    weather that was 23 percent warmer than the prior year,  partially offset by
    a 4 percent reduction in operating and maintenance expenses.

o   Shipping  operating  income  decreased  $5.1  million  in  1999,  reflecting
    increased  pressures on pricing,  higher operating expenses and a decline in
    charter  revenues.  These factors more than offset the  additional  revenues
    generated from record volumes shipped.  In 1998,  shipping  operating income
    rose $2.3 million to a record $27.6  million due to a 4 percent  increase in
    volumes shipped and higher average rates.

o   Corporate and other operating income was up $2.3 million in 1999 due to
    better results at Nicor's unregulated energy ventures.

Nonoperating  items.  In 1999,  other  income  increased  $7.7  million to $23.2
million as several positive factors,  including interest benefits on tax-related
matters  and a gain on the sale of  Nicor's  interest  in an  electronic  energy
trading  system,  more  than  offset a  decline  in real  estate  sales  and the
write-off of

<PAGE>


Nicor Inc.                                                               Page 10

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

software  development  costs.  Nicor's retail energy services joint venture also
contributed to the improvement.

Interest  expense  decreased 3 percent in 1999 to $45.1 million and 5 percent in
1998 to $46.6 million due primarily to  refinancing  at lower interest rates and
reduced average borrowing levels.


RESULTS OF OPERATIONS

Details of various  financial and operating  information by segment can be found
in the tables throughout this review.  The following  discussion  summarizes the
major items impacting Nicor's results of operations.

Operating  revenues.  Operating revenues by major business segment are presented
below:

(millions)                          1999         1998         1997
                                 ------------ ------------ ------------
Gas distribution                 $  1,326.2   $  1,229.0   $  1,730.5
Shipping                              229.9        224.5        213.1
Corporate and other                    59.1         11.6         49.0
                                 ------------ ------------ ------------
                                 $  1,615.2   $  1,465.1   $  1,992.6
                                 ============ ============ ============

Nicor's  operating  revenues  increased $150.1 million in 1999. Gas distribution
revenues  increased  $97.2 million due to higher  deliveries of natural gas, and
higher  natural  gas prices  which are  passed  directly  through to  customers.
Partially  offsetting  this increase was the impact of customers  switching from
sales to transportation  service.  Shipping revenues rose by $5.4 million as the
impact of record volumes  shipped more than offset a decline in charter  revenue
and  lower  average  prices.  Revenues  generated  from  Nicor's  wholesale  gas
marketing  business  accounted  for the  increase  in the  corporate  and  other
category.

In 1998,  Nicor's operating revenues decreased to $1,465.1 million from $1,992.6
million  as gas  distribution  revenues  were down  significantly  from 1997 due
principally  to lower  natural gas prices and lower  deliveries  of natural gas.
Shipping  revenues rose 5 percent in 1998 due to additional  volumes shipped and
higher  average  rates.  Corporate and other  revenues  decreased in 1998 as the
company's  retail energy  services  business  became part of a 50-percent  owned
joint venture that is accounted for under the equity method.

Gas distribution margin. Gas distribution margin,  defined as operating revenues
less cost of gas and revenue taxes,  which are both passed  directly  through to
customers, and margin per Mcf delivered are shown in the following table:

                                       1999         1998         1997
                                    ------------ ------------ ------------
Margin (millions)                   $    487.2   $    469.4   $    496.0
Margin per Mcf delivered                   .96          .96          .91

Weather was the largest factor  impacting the  fluctuation in margin during 1999
and 1998,  and margin per Mcf  delivered in 1998.  Margin per Mcf  delivered was
unchanged  in  1999  as the  impact  of a  reduction  in  lower-margin  electric
generation deliveries offset the effect of weather.


<PAGE>


Nicor Inc.                                                               Page 11

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

Operating and maintenance. In 1999, operating and maintenance expenses increased
$18 million to $356 million due to higher  volume-related  costs in the shipping
segment and higher costs in the gas  distribution  segment  caused,  in part, by
higher information technology spending levels. The $2.3 million decrease in 1998
to $338  million  was despite 5 percent  higher  costs in the  shipping  segment
related to an increase in volumes shipped.  Lower  retirement-benefits  costs in
the gas distribution segment,  resulting principally from favorable pension fund
investment  returns,  contributed  to the  overall  decrease  in  operating  and
maintenance expenses in 1998.

Depreciation.  Depreciation  increased 3 percent in 1999 to $140.3 million and 4
percent in 1998 to $136.5 million due primarily to gas plant additions.


FINANCIAL CONDITION AND LIQUIDITY

The company  believes it has access to adequate  resources to meet its needs for
capital expenditures, debt and stock redemptions,  dividend payments and working
capital. These resources include net cash flow from operating activities, access
to capital markets, lines of credit and short-term investments.

Operating  cash flows.  Net cash flow provided  from  operating  activities  was
$205.7  million,  $368.4  million  and $211.1  million  in 1999,  1998 and 1997,
respectively.  Year-to-year  changes in operating  cash flow result largely from
fluctuations in working capital items occurring  mainly in the gas  distribution
segment because of factors  including  weather,  the price of gas, the timing of
collections from customers and gas purchasing  practices.  The company generally
relies on short-term  financing to meet temporary  increases in working  capital
needs.

Capital  expenditures.  Capital  expenditures  by  major  business  segment  are
presented below:

                            Estimated
(millions)                    2000         1999         1998         1997
                           ------------ ------------ ------------ ------------
Gas distribution           $      135   $    127.4   $    112.6   $    101.8
Shipping                           45         26.0         23.3         10.9
Corporate and other                 -           .6           .3           .3
                           ------------ ------------ ------------ ------------
                           $      180   $    154.0   $    136.2   $    113.0
                           ============ ============ ============ ============

The following  summarizes  capital  expenditure  comparisons  for major business
segments:

o  Gas  distribution   capital  expenditures  rose  in  1999  due  primarily  to
enhancements to the company's  operating  system.  In 1998, the increase was due
largely to expenditures for information technology.

o Shipping segment capital expenditures increased in 1999 due, in part, to costs
for the replacement of a warehouse which is expected to be completed in 2000. In
1998,  the increase in  expenditures  related  primarily to the  replacement  of
leased freight equipment with owned equipment. In both periods, expenditures for
information technology also contributed to the increase. The higher expenditures
expected in 2000 are related to the warehouse construction and progress payments
for the construction of two vessels.  These vessels are expected to be delivered
in late 2001 and early 2002 at a total cost of about $40 million.


<PAGE>


Nicor Inc.                                                               Page 12

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

Other  investments.  Nicor  invested $12 million,  $15 million and $8 million in
1999, 1998 and 1997,  respectively,  in a cargo container leasing business.  The
company also  invested $2 million,  $8 million and $7 million in 1999,  1998 and
1997, respectively, in affordable housing tax credit funds.

Financing activities.  Nicor has earned the highest long-term debt ratings given
in the gas distribution  industry and maintains  relatively low debt percentages
and high interest coverage ratios.

                                                1999         1998        1997
                                             ------------ ----------- ----------
Long-term debt, net of current maturities,
    as a percent of capitalization                35.5%       42.1%       42.3%
Times interest earned, before income taxes         5.2         4.8         5.0

Long-term  debt.  Nicor Gas has $250 million of First Mortgage  Bonds  remaining
available for issuance  under a December  1998 shelf  registration  filing.  Net
proceeds  from  securities  issued are  typically  used for the  refinancing  of
certain  outstanding  First Mortgage  Bonds,  for  construction  programs to the
extent not  provided by  internally  generated  funds and for general  corporate
purposes.

In January 2000, Nicor Gas issued $50 million of adjustable rate unsecured notes
due in 2001 at an initial rate of 6.11% to fund the redemption of $50 million of
unsecured notes at 5.065% due in 2000.

During 1999,  Nicor Gas issued $50 million of First  Mortgage Bonds at 5.37% due
in 2009 and $50 million of unsecured notes at 5.065% due in 2000. Redemptions of
First Mortgage  Bonds during 1999 were as follows:  $50 million at 5.875% due in
2000, $50 million at 7.375% due in 2023 and $50 million at 8.25% due in 2024.

In 1998, Nicor Gas issued First Mortgage Bonds as follows:  $50 million at 5.75%
due in 2003 and $50 million at 6.58% due in 2028.  Redemptions of First Mortgage
Bonds  during  1998 were as  follows:  $25  million at 5.875%  due in 1998,  $25
million at 6.25% due in 1999 and $75 million at 8.25% due in 2022.

During 1997,  Nicor Gas issued First Mortgage  Bonds as follows:  $50 million at
6.75% due in 2002 and $50  million at 7.375% due in 2027.  Redemptions  of First
Mortgage Bonds during 1997 were as follows:  $25 million at 5.5% due in 1997 and
$50 million at 9% due in 2019.

Short-term debt. Nicor and Nicor Gas maintain  short-term credit agreements with
major domestic and foreign banks. At December 31, 1999, these agreements,  which
serve as backup for the issuance of commercial  paper,  totaled $342.5  million.
The  company  had  $342.5  million  and  $234.5  million  of  commercial   paper
outstanding at year-end 1999 and 1998, respectively.

Common stock.  In the second  quarter of 1999,  Nicor  completed the $50 million
common stock repurchase program initiated in June 1997 and announced another $50
million common stock repurchase program. Purchases under these programs are made
as market conditions  permit through open market  transactions and to the extent
cash flow from operations is available after other investment opportunities. The
company  purchased and retired .6 million,  .7 million and 1.3 million shares in
1999, 1998 and 1997, respectively, at a cost of $23 million, $28 million and $45
million. At December 31, 1999, approximately $32 million remained authorized for
the repurchase of common stock under the existing program. Over the past decade,
the company has repurchased over 20 percent of its outstanding stock.


<PAGE>


Nicor Inc.                                                               Page 13

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

Nicor  increased  its  quarterly  common stock  dividend rate during 1999 by 5.4
percent, which was the twelfth consecutive year of an increase. The company paid
dividends  of $72.9  million,  $70 million and $67.5  million in 1999,  1998 and
1997, respectively.

Other.  Restrictions imposed by regulatory agencies and loan agreements limiting
the amount of  subsidiary  net assets that can be  transferred  to Nicor are not
expected  to have a material  impact on the  company's  ability to meet its cash
obligations.


FACTORS AFFECTING BUSINESS PERFORMANCE

The following  factors can impact  year-to-year  comparisons  and may affect the
future performance of Nicor's businesses.

Gas  distribution.  Nicor Gas, a  regulated  natural gas  distribution  utility,
serves more than 1.9 million  customers in a service  territory that encompasses
most of the  northern  third of  Illinois,  excluding  the city of Chicago.  The
region's  economy is diverse and has grown  steadily  over the years,  providing
Nicor Gas with a  well-balanced  mix of  residential,  commercial and industrial
customers. In 1999,  residential,  commercial and industrial customers accounted
for about 41  percent,  24 percent  and 35 percent  of natural  gas  deliveries,
respectively.

Since about one-half of gas deliveries are used for space heating,  fluctuations
in  weather  can  have a  significant  impact  on  year-to-year  comparisons  of
operating income and cash flow. To provide  protection from the financial impact
of unusually warm weather,  Nicor Gas purchased a weather insurance policy which
will  protect  2000  earnings and cash flow if weather for the year is more than
6.5 percent warmer than normal.

In  addition  to the  impact of  weather,  significant  changes in gas prices or
economic conditions can impact gas usage. However,  Nicor Gas' large residential
customer base provides relative  stability during weak economic  periods.  Also,
the industrial and commercial  customer base is well diversified,  lessening the
impact of industry-specific economic swings.

Nicor Gas competes with other energy  suppliers  based on such factors as price,
service  and  reliability.  The  company  is well  positioned  to deal  with the
possibility  of fuel  switching by  customers  because it has rates and services
designed to compete against  alternative  fuels and because of its competitively
priced  supply  of  gas.  In  addition,  the  company  has a rate  which  allows
negotiation with potential bypass customers,  and no customer has bypassed since
the  rate  became  effective  in 1987.  Nicor  Gas also  offers  commercial  and
industrial  customers   flexibility  and  alternatives  in  rates  and  service,
increasing its ability to compete in these markets.

Direct connection to six interstate pipelines and extensive  underground storage
capacity  allow the company to  maintain  rates that are among the lowest in the
nation, while also providing  transportation customers with direct access to gas
supplies  and  storage  services.  In  addition,  in an effort to ensure  supply
reliability,  the company purchases gas from several different producing regions
under varied contract terms.


<PAGE>


Nicor Inc.                                                               Page 14

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

Nicor Gas' growth in deliveries  has  traditionally  come from a combination  of
customer additions and increased usage among existing  commercial and industrial
customers.  Deliveries to power  generation  facilities have also contributed to
growth.   While  the  company   anticipates   continued   growth  in  deliveries
attributable  to these  factors,  a partial  offset is  expected  by  customers'
installation of more energy-efficient equipment.

On January 1, 2000, Nicor Gas' performance-based rate (PBR) plan for natural gas
costs went into effect. Under the PBR, Nicor Gas' total gas supply costs will be
compared to a benchmark tied to a market index.  Savings and losses  relative to
the benchmark will be shared equally with  customers.  Transportation  customers
who are responsible for their own gas supplies are not affected by the PBR plan.
Assuming  a  benchmark  of $1  billion,  each  one-percent  deviation  from  the
benchmark would affect net income by about $3 million.  At the end of two years,
the plan will be subject to ICC review.

In another regulatory  development,  Nicor Gas received approval from the ICC in
1999 to expand  Customer  Select(R),  a  voluntary  pilot  program  that  offers
customers a choice of natural  gas  suppliers.  Customer  Select is in its third
year and now all  commercial  and  industrial  customers,  as well as more  than
250,000 residential customers in 16 communities, are eligible to participate. In
the program's first two years,  about 30 percent of eligible business  customers
and 20  percent  of  eligible  residential  customers  signed  up. The choice of
another  natural gas  commodity  supplier has no impact on Nicor Gas'  operating
income,  and in all cases,  Nicor Gas continues to deliver the natural gas, read
meters,  maintain its distribution system,  ensure safety and respond to service
and emergency  calls.  Nicor Gas supports full customer  choice and is presently
evaluating  providing  all  customers  the ability to choose  their  natural gas
supplier.

In order to generate additional  contributions to earnings growth, Nicor Gas has
been pursuing several nontraditional  activities.  The Chicago area has become a
major   market   hub   for   natural   gas,   and   demand   for   storage   and
transmission-related services by marketers, other gas distribution companies and
for  electric  power  generation  is  expected  to  increase  significantly.  In
addition, the company continues to assess its nonstrategic real estate holdings,
and is  evaluating  the  potential  to  maximize  the value from these  holdings
through additional property sales or development over the next several years.

Nicor Gas is regulated by the ICC, which  establishes  the rules and regulations
governing utility rates and services in Illinois.  Rates are generally  designed
to allow the company to recover its costs and provide an  opportunity  to earn a
fair return for its investors.  Further  changes in the  regulatory  environment
could affect the longer-term performance of Nicor Gas.

Nicor Inc.                                                             Page 15
- -------------------------------------------------------------------------------

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of Operations (continued)

Gas Distribution Statistics

                                                 1999        1998       1997
                                               ---------   ---------  ---------

Operating revenues (millions)
   Sales
     Residential                                $ 899.8     $ 813.6  $ 1,126.0
     Commercial                                   172.3       189.4      314.8
     Industrial                                    24.5        27.5       56.8
                                               ---------   ---------  ---------
                                                1,096.6     1,030.5    1,497.6
                                               ---------   ---------  ---------
   Transportation
     Residential                                    1.7           -          -
     Commercial                                    70.3        57.2       55.3
     Industrial                                    43.7        39.2       48.3
     Other                                          4.2         1.6         .1
                                               ---------   ---------  ---------
                                                  119.9        98.0      103.7
                                               ---------   ---------  ---------
   Revenue taxes and other                        109.7       100.5      129.2
                                               ---------   ---------  ---------
                                              $ 1,326.2   $ 1,229.0  $ 1,730.5
                                               =========   =========  =========

Deliveries (Bcf)
   Sales
     Residential                                  209.0       192.4      233.2
     Commercial                                    39.8        44.3       65.2
     Industrial                                     6.1         7.1       12.9
                                               ---------   ---------  ---------
                                                  254.9       243.8      311.3
                                               ---------   ---------  ---------
   Transportation
     Residential                                     .9           -          -
     Commercial                                    82.1        67.5       66.0
     Industrial                                   170.2       175.7      168.0
                                               ---------   ---------  ---------
                                                  253.2       243.2      234.0
                                               ---------   ---------  ---------
                                                  508.1       487.0      545.3
                                               =========   =========  =========

Year-end customers (thousands)
   Sales
     Residential                                1,753.0     1,737.6    1,710.0
     Commercial                                   108.9       127.9      143.0
     Industrial                                     7.4         9.1       11.1
                                               ---------   ---------  ---------
                                                1,869.3     1,874.6    1,864.1
                                               ---------   ---------  ---------
   Transportation
     Residential                                   16.2           -          -
     Commercial                                    57.2        35.9       18.7
     Industrial                                     6.6         5.0        3.0
                                               ---------   ---------  ---------
                                                   80.0        40.9       21.7
                                               ---------   ---------  ---------
                                                1,949.3     1,915.5    1,885.8
                                               =========   =========  =========

Other statistics
   Degree days (normal 6,116)                     5,272       4,834      6,254
   Colder (warmer) than normal                      (14)%       (21)%        2%
   Average gas cost per Mcf sold                 $ 2.93      $ 2.76     $ 3.54




<PAGE>


Nicor Inc.                                                               Page 16

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

Shipping.  Tropical Shipping is one of the largest  containerized cargo carriers
in the  Caribbean,  a region  characterized  by modest market growth and intense
competition.  Tropical Shipping has a reputation for providing quality,  on-time
delivery service--a  reputation that has helped the company establish a dominant
position in many of the markets it serves,  which  include the  Bahamas,  Cayman
Islands,  Dominican Republic,  Virgin Islands and Eastern Caribbean. The company
is the top carrier of U.S. exports from the East Coast to the Caribbean.

Tropical Shipping's  financial results can be significantly  affected by general
economic  conditions  in the United  States  and the  Caribbean.  The  company's
shipments consist primarily of southbound cargo such as building materials, food
and  other  necessities  for  developers,  manufacturers  and  residents  in the
Caribbean,  as well as tourist-related  shipments intended for use in hotels and
resorts,  and on cruise ships. The balance of Tropical Shipping's cargo consists
of northbound  shipments of agricultural  products and apparel,  and interisland
shipments.

The Caribbean  marketplace is very  competitive  with global  carriers  recently
establishing  a presence  in several  markets  that  Tropical  Shipping  serves.
Additionally, the Ocean Shipping Reform Act, which allows confidential contracts
between  shipping  companies  and their  customers,  created the  potential  for
further  price  competition  when it went  into  effect  during  1999.  Tropical
Shipping is continuing to meet these challenges by focusing on superior customer
service,  controlling  costs,  and  maximizing  the  efficiency and value of its
vessel  fleet  and  shore  assets.  In  1999,   Tropical  Shipping  ordered  the
construction of two vessels to replace chartered capacity and to support growth.
The  vessels  are  expected to be  delivered  in late 2001 and early  2002.  The
company is also  replacing its Miami  warehouse  with a larger and more flexible
facility.  The company's strategy for growth includes pursuing  opportunities to
increase  volumes  in markets  it  already  serves and to expand  geographically
within the region.  Tropical  Shipping's  expansion  efforts  could also include
strategic acquisitions of other shipping companies.

Shipping Statistics
                                       1999         1998         1997
                                    ------------ ------------ ------------
TEUs shipped (thousands)
    Southbound                          126.5         119.4        110.0
    Northbound                           17.6          16.1         14.5
    Interisland                           8.3           8.7         14.0
                                    ------------ ------------ ------------
                                        152.4         144.2        138.5
                                    ============ ============ ============

Other statistics
    Revenue per TEU                 $   1,508    $    1,526   $    1,488
    Ports served                           23            23           26
    Vessels owned                          13            13           14




<PAGE>


Nicor Inc.                                                               Page 17

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (continued)

Other Nicor  ventures.  Nicor is involved in several  unregulated  ventures that
leverage the company's  reputation,  location,  assets and expertise  into other
income-producing  opportunities.  These ventures include retail energy services,
natural  gas  supply  services,   pipeline  projects  and  other  energy-related
opportunities. An update on Nicor's unregulated ventures follows:

Retail energy  services.  Nicor Energy,  a 50-percent  owned joint venture,  was
formed in 1997 to offer natural gas,  electricity and related retail services to
customers  throughout the Midwest as markets are  deregulated.  The company is a
leading  retail  natural gas marketer in the Midwest,  supplying  natural gas to
more than 50,000  customers  in Illinois  and  Indiana.  The company  also began
selling electricity to Illinois customers in 1999 as part of a statewide program
that allows business customers to switch electricity suppliers.

Gas supply services.  Nicor's system  flexibility and location on the interstate
pipeline grid have allowed the company to develop several business ventures that
provide  services to interstate  pipelines,  other gas  distribution  companies,
electric  power  generators,  and  gas  marketers  and  brokers.  Through  Nicor
Enerchange,  the company is  building a niche  wholesale  natural gas  marketing
business and  providing  hub  management  services.  Nicor has also utilized its
supply assets as part of the nontraditional  activities within its regulated gas
distribution business.

Pipeline projects. In January 2000, Nicor signed an agreement to become an equal
partner in the planned  Horizon  Pipeline  with Natural Gas Pipeline  Company of
America,  a subsidiary of Kinder Morgan,  Inc. The proposed $75 million  natural
gas pipeline will  originate in Joliet,  Illinois and extend 74 miles to McHenry
County in  northern  Illinois.  Subject to FERC  approval,  construction  of the
pipeline will begin in spring of 2001, with completion  anticipated in 2002. The
strategic  location of the pipeline will enable Nicor to  accommodate  growth in
its traditional gas distribution  business,  and it will also put the company in
excellent  position to supply natural gas for the new electric power  generation
projects being proposed in northern Illinois.

Power  generation  opportunities.  Nicor plans to  participate in the market for
electric power  generation  needs.  An important  requirement of any large power
generation  project  is  managing  daily  gas  supply  needs  and  Nicor is well
positioned  to provide  the  necessary  storage and  supply-related  services in
northern  Illinois.  In the  mid-size  market,  Nicor is well  established  as a
contractor for power generation projects.

Other  ventures.  In  addition,  Nicor  has a  number  of  other  energy-related
businesses  engaged in activities  such as developing the market for natural gas
vehicles,  offering  residential  and  commercial  HVAC service  contracts,  and
providing  product  testing,  development  and  commercialization.   Nicor  will
continue to explore these and other opportunities to build upon its expertise in
the energy industry.

Market risk.  The company is exposed to market risk in the normal  course of its
business operations,  including the risk of loss arising from adverse changes in
natural gas commodity prices and interest rates.

Commodity  price risk.  The  company has  established  policies  and  procedures
governing  the  management  of commodity  price risks and the use of  derivative
commodity  instruments  to hedge its exposure to such risks.  A risk  management
committee exists to oversee compliance with such policies and procedures.



<PAGE>


Nicor Inc.                                                               Page 18

Item 7.    Management's Discussion and Analysis of Financial Condition
           and Results of  Operations (concluded)

Nicor's  regulated  utility,  Nicor Gas, is generally not exposed to market risk
caused by changes in  commodity  prices.  This is due to current  Illinois  rate
regulation  governing the recovery of all prudently  incurred natural gas supply
costs from customers. Although the company has a PBR plan for natural gas costs,
the plan does not expose the company to commodity  price risk because actual gas
costs are compared to a market-based  benchmark as opposed to a fixed benchmark.
Additional information about the PBR plan is presented on page 14.

Nicor's unregulated energy businesses are subject to natural gas commodity price
risk, arising primarily from fixed price purchase and sale agreements and gas in
storage inventories.  Derivative commodity instruments such as futures, options,
forwards and swaps may be used to hedge this risk. Open positions are restricted
by policy to an  immaterial  amount.  To manage the credit risk  inherent in the
company's commodity price risk management  programs,  the company contracts with
creditworthy counterparties and limits its exposure to any one counterparty.

Interest  rate risk.  The company is also exposed to changes in interest  rates,
primarily as a result of its short- and long-term  debt. The company manages its
interest rate risk primarily by issuing  long-term  fixed-rate debt with varying
maturities  and  refinancing  certain debt. For further  information  about debt
securities,  interest rates and fair values,  see the Consolidated  Statement of
Capitalization  on page 24 and  Short-  and  Long-Term  Debt and  Fair  Value of
Financial Instruments on page 27.

New accounting pronouncements.  In June 1999, the Financial Accounting Standards
Board  approved an amendment to defer the  effective  date of Statement No. 133,
Accounting for Derivative Instruments and Hedging Activities.  The company plans
to adopt  this  statement  on  January  1, 2001 and does not expect it to have a
material impact on its financial condition or results of operations. For further
information, see New Accounting Pronouncements beginning on page 26.

Year 2000  rollover.  Nicor's  preparation  for the  rollover to January 1, 2000
proved  successful as no interruptions in service to customers or disruptions of
normal business  operations were  experienced.  Since inception of the company's
efforts in 1996,  about $6 million has been  incurred  for hardware and software
modifications  and  replacements,   internal  information  technology  resources
devoted  solely to the Year 2000 effort and outside  consultants.  Although  the
company does not anticipate any issues  relating to the year 2000 to arise,  the
company  maintains  contingency  plans to address  scenarios  that  could  still
emerge.

Other  contingencies.  The  company  is  involved  in  legal  or  administrative
proceedings  before various courts and agencies with respect to rates, taxes and
other   matters.   In  addition,   the  company  is   conducting   environmental
investigations and remedial  activities at former  manufactured gas plant sites.
Although  unable to  determine  the outcome of these  contingencies,  management
believes that  appropriate  accruals have been  recorded.  Final  disposition of
these  matters  is not  expected  to have a  material  impact  on the  company's
financial  condition  or results of  operations.  For further  information,  see
Contingencies on page 34.

Item 7A.   Quantitative and Qualitative Disclosures about Market Risk

For  disclosures  about market risk, see Market Risk beginning on page 17, which
is incorporated herein by reference.


<PAGE>


Nicor Inc.                                                               Page 19

Item 8.    Financial Statements and Supplementary Data


                                                                           Page

Report of Independent Public Accountants..................................  20

Financial Statements:

    Consolidated Statement of Income......................................  21

    Consolidated Statement of Cash Flows..................................  22

    Consolidated Balance Sheet............................................  23

    Consolidated Statement of Capitalization..............................  24

    Consolidated Statement of Common Equity...............................  25

    Notes to the Consolidated Financial Statements........................  26


<PAGE>


Nicor Inc.                                                               Page 20

Report of Independent Public Accountants


To the Shareholders and Board of Directors of Nicor Inc.:

We have audited the  accompanying  consolidated  balance  sheet and statement of
capitalization of Nicor Inc. (an Illinois  corporation) and subsidiary companies
as of December 31, 1999 and 1998,  and the related  consolidated  statements  of
income,  common  equity and cash flows for each of the three years in the period
ended December 31, 1999. These financial statements and the schedule referred to
below are the responsibility of the company's management.  Our responsibility is
to express an opinion on these  financial  statements  and the schedule based on
our audits.

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

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the  financial  position of Nicor Inc.  and  subsidiary
companies  as of December 31, 1999 and 1998,  and the results of its  operations
and its cash flows for each of the three years in the period ended  December 31,
1999, in conformity with generally accepted accounting principles.

Our  audits  were  made for the  purpose  of  forming  an  opinion  on the basic
financial  statements taken as a whole. The financial statement schedule on page
37 is  presented  for  purposes of complying  with the  Securities  and Exchange
Commission's  rules  and is not part of the  basic  financial  statements.  This
schedule has been subjected to the auditing  procedures applied in the audits of
the  basic  financial  statements  and,  in our  opinion,  fairly  states in all
material  respects  the  financial  data  required  to be set forth  therein  in
relation to the basic financial statements taken as a whole.




ARTHUR ANDERSEN LLP
Arthur Andersen LLP
Chicago, Illinois
January 27, 2000


<PAGE>



Nicor Inc.                                                             Page 21
- -------------------------------------------------------------------------------

Consolidated Statement of Income
(millions, except per share data)


                                                   Year ended December 31
                                               --------------------------------
                                                 1999        1998       1997
                                               ---------   ---------  ---------

Operating revenues                            $ 1,615.2   $ 1,465.1  $ 1,992.6
                                               ---------   ---------  ---------

Operating expenses
   Cost of gas                                    802.3       682.7    1,164.2
   Operating and maintenance                      356.0       338.0      340.3
   Depreciation                                   140.3       136.5      131.2
   Taxes, other than income taxes                 104.6        99.3      127.1
                                               ---------   ---------  ---------
                                                1,403.2     1,256.5    1,762.8
                                               ---------   ---------  ---------

Operating income                                  212.0       208.6      229.8

Other income (expense), net                        23.2        15.5       16.2
                                               ---------   ---------  ---------

Income before interest on debt and income taxes   235.2       224.1      246.0

Interest on debt, net of amounts capitalized       45.1        46.6       49.1
                                               ---------   ---------  ---------

Income before income taxes                        190.1       177.5      196.9

Income taxes                                       65.7        61.1       69.0
                                               ---------   ---------  ---------

Net income                                        124.4       116.4      127.9

Dividends on preferred stock                         .3          .3         .4
                                               ---------   ---------  ---------

Earnings applicable to common stock             $ 124.1     $ 116.1    $ 127.5
                                               =========   =========  =========

Average shares of common stock
   Basic                                           47.3        47.9       48.8
   Diluted                                         47.4        48.1       48.9

Earnings per average share of common stock
   Basic                                         $ 2.63      $ 2.43     $ 2.62
   Diluted                                         2.62        2.42       2.61


The accompanying notes are an integral part of this statement.










Nicor Inc.                                                             Page 22
- -------------------------------------------------------------------------------

Consolidated Statement of Cash Flows
(millions)


                                                   Year ended December 31
                                               --------------------------------
                                                 1999        1998       1997
                                               ---------   ---------  ---------
Operating activities
   Net income                                   $ 124.4     $ 116.4    $ 127.9
   Adjustments to reconcile net income to net
    cash flow
     provided from operating activities:
       Depreciation                               140.3       136.5      131.2
       Deferred income tax expense (benefit)       14.4        18.6      (14.3)
       Changes in assets and liabilities:
         Receivables, less allowances             (95.8)       90.6      (14.6)
         Gas in storage                            74.5        22.3        3.8
         Deferred/accrued gas costs               (45.8)        4.8       76.2
         Accounts payable                          12.1        28.4      (92.0)
         Postretirement benefits                  (16.5)      (19.2)      (7.9)
         Other                                     (1.9)      (30.0)        .8
                                               ---------   ---------  ---------
   Net cash flow provided from operating
     activities                                   205.7       368.4      211.1
                                               ---------   ---------  ---------

Investing activities
   Capital expenditures                          (154.0)     (136.2)    (113.0)
   Short-term investments                          26.1       (35.6)      (7.5)
   Other                                           (7.4)      (19.9)      (5.7)
                                               ---------   ---------  ---------
   Net cash flow used for investing activities   (135.3)     (191.7)    (126.2)
                                               ---------   ---------  ---------

Financing activities
   Net proceeds from issuing long-term debt       101.5       107.3      106.3
   Disbursements to retire long-term debt        (156.9)     (129.9)     (77.6)
   Short-term borrowings (repayments), net        109.7       (44.4)     (13.1)
   Dividends paid                                 (73.2)      (70.3)     (67.8)
   Disbursements to reacquire stock               (23.1)      (33.4)     (49.4)
   Other                                            1.1         1.8        1.4
                                               ---------   ---------  ---------
   Net cash flow used for financing activities    (40.9)     (168.9)    (100.2)
                                               ---------   ---------  ---------

Net increase (decrease) in cash and cash
   equivalents                                     29.5         7.8      (15.3)

Cash and cash equivalents, beginning of year       13.0         5.2       20.5
                                               ---------   ---------  ---------

Cash and cash equivalents, end of year           $ 42.5      $ 13.0      $ 5.2
                                               =========   =========  =========

Supplemental information
   Income taxes paid, net of refunds             $ 46.2      $ 42.9     $ 66.6
   Interest paid, net of amounts capitalized       45.5        49.1       50.5


The accompanying notes are an integral part of this statement.


Nicor Inc.                                                             Page 23
- -------------------------------------------------------------------------------

Consolidated Balance Sheet
(millions)

                                                             December 31
                                                       ------------------------
                                                          1999         1998
                                                       -----------   ----------
                        Assets

Current assets
   Cash and cash equivalents                               $ 42.5       $ 13.0
   Short-term investments, at cost which approximates
     market                                                  29.7         55.8
   Receivables, less allowances of $7.1 and $6.3,
     respectively                                           359.8        264.0
   Gas in storage                                            31.0        105.5
   Deferred gas costs                                        15.9            -
   Other                                                     29.1         26.4
                                                       -----------   ----------
                                                            508.0        464.7
                                                       -----------   ----------

Property, plant and equipment, at cost
   Gas distribution                                       3,200.3      3,119.7
   Shipping                                                 280.8        258.9
   Other                                                      2.0          1.2
                                                       -----------   ----------
                                                          3,483.1      3,379.8
   Less accumulated depreciation                          1,747.9      1,648.0
                                                       -----------   ----------
                                                          1,735.2      1,731.8
                                                       -----------   ----------

Other assets                                                208.6        168.1
                                                       -----------   ----------

                                                        $ 2,451.8    $ 2,364.6
                                                       ===========   ==========

            Liabilities and capitalization

Current liabilities
   Long-term obligations due within one year               $ 74.2        $ 1.2
   Short-term borrowings                                    344.2        234.5
   Accounts payable                                         282.4        270.3
   Accrued gas costs                                            -         29.9
   Other                                                     44.9         43.0
                                                       -----------   ----------
                                                            745.7        578.9
                                                       -----------   ----------

Deferred credits and other liabilities
   Deferred income taxes                                    266.6        238.9
   Regulatory income tax liability                           74.8         78.6
   Unamortized investment tax credits                        42.7         44.1
   Other                                                     91.9        101.5
                                                       -----------   ----------
                                                            476.0        463.1
                                                       -----------   ----------

Capitalization
   Long-term debt                                           436.1        557.3
   Preferred stock                                            6.3          6.3
   Common equity                                            787.7        759.0
                                                       -----------   ----------
                                                          1,230.1      1,322.6
                                                       -----------   ----------

                                                        $ 2,451.8    $ 2,364.6
                                                       ===========   ==========


The accompanying notes are an integral part of this statement.

Nicor Inc.                                                              Page 24
- -------------------------------------------------------------------------------

Consolidated Statement of Capitalization
(millions, except share data)


                                                      December 31
                                          -------------------------------------
                                                1999               1998
                                          ------------------  -----------------

First Mortgage Bonds
   Maturity  Interest rate
   --------  ---------
     2000     5.875%                       $     -             $ 50.0
     2001     6.45                            75.0               75.0
     2002     6.75                            50.0               50.0
     2003     5.75                            50.0               50.0
     2009     5.37                            50.0                  -
     2021     8.875                           50.0               50.0
     2023     7.375                              -               50.0
     2024     8.25                               -               50.0
     2025     7.26                            50.0               50.0
     2027     7.375                           50.0               50.0
     2028     6.58                            50.0               50.0
                                          ---------           --------
                                             425.0              525.0
   Less:  Unamortized debt discount,
            net of premium                     3.3                4.2
                                          ---------           --------
                                             421.7   34.3 %     520.8   39.4 %
                                          ---------           --------

Other long-term debt
   Notes payable due 2000, 6.83%              22.5               22.5
   Notes payable due 2000, 5.065%             50.0                  -
   Other                                      16.1               15.2
                                          ---------           --------
                                              88.6               37.7
   Less:  Amount due within one year          74.2                1.2
                                          ---------           --------
                                              14.4    1.2        36.5    2.7
                                          ---------           --------

Preferred and preference stock
   Cumulative, $50 par value, 1,600,000
     preferred shares authorized; and
     cumulative, without par value,
     20,000,000 preference shares
     authorized
       Redeemable preferred stock, 4.48%
         and 5.00% series, 125,223
         shares outstanding                    6.3     .5         6.3     .5
                                          ---------           --------

Common equity
   Common stock, $2.50 par value,
     160,000,000 shares authorized
     (4,822,428 and 4,854,542  shares
     reserved for conversion and other
     purposes and 46,890,301 and
     47,513,714 shares outstanding,
     respectively)                           117.2              118.8
   Retained earnings                         670.5              640.2
                                          ---------           --------
                                             787.7   64.0       759.0   57.4
                                          --------- ------- ---------- ------
                                          $1,230.1  100.0 % $ 1,322.6  100.0%
                                          ========= ======= ========== ======


The accompanying notes are an integral part of this statement.

Nicor Inc.                                                             Page 25
- -------------------------------------------------------------------------------

Consolidated Statement of Common Equity
(millions, except per share data)


                                                   Year ended December 31
                                               --------------------------------
                                                 1999        1998       1997
                                               ---------   ---------  ---------
Common stock
   Balance at beginning of year                 $ 118.8     $ 120.5    $ 123.7
   Issued and converted stock                        .1          .3         .2
   Reacquired and cancelled stock                  (1.7)       (2.0)      (3.4)
                                                ---------   ---------  ---------
   Balance at end of year                         117.2       118.8      120.5
                                               ---------   ---------  ---------

Paid-in capital
   Balance at beginning of year                       -           -       23.8
   Issued and converted stock                       1.2         3.0        2.9
   Reacquired and cancelled stock                  (1.2)       (3.0)     (26.7)
                                               ---------   ---------  ---------
   Balance at end of year                             -           -          -
                                               ---------   ---------  ---------

Retained earnings
   Balance at beginning of year                   640.2       623.5      582.1
   Net income                                     124.4       116.4      127.9
   Dividends on common stock ($1.56, $1.48
     and $1.40 per share, respectively)           (73.6)      (70.6)     (68.0)
   Dividends on preferred stock                     (.3)        (.3)       (.4)
   Reacquired and cancelled stock                 (20.2)      (28.8)     (18.1)
                                               ---------   ---------  ---------
    Balance at end of year                        670.5       640.2      623.5
                                               ---------   ---------  ---------
                                                $ 787.7     $ 759.0    $ 744.0
                                               =========   =========  =========


The accompanying notes are an integral part of this statement.



Nicor Inc.                                                              Page 26

Notes to the Consolidated Financial Statements

ACCOUNTING POLICIES

Consolidation.  The consolidated  financial  statements  include the accounts of
Nicor  and  its  subsidiaries.   All  significant   intercompany   balances  and
transactions have been eliminated.

Use  of  estimates.   The  preparation  of  the  financial  statements  requires
management to make estimates that affect reported amounts.  Actual results could
differ from those estimates.

Reclassifications. Certain reclassifications have been made to conform the prior
years' financial statements to the current year's presentation.

Regulation.  Nicor Gas is regulated by the ICC which  establishes  the rules and
regulations  governing  utility  rates and  services  in  Illinois.  The company
applies  accounting  standards  that  recognize  the  economic  effects  of rate
regulation and, accordingly, has recorded regulatory assets and liabilities. The
company had net  regulatory  liabilities  at December 31, 1999 and 1998 of about
$40 million and $95 million, respectively.

Operating  revenues and gas costs. Gas  distribution  revenues are recorded when
gas is delivered to customers. The cost of gas purchased, adjusted for inventory
activity,  is reflected in volumetric  charges to customers through operation of
the Uniform  Purchased Gas Adjustment  Clause (PGA). Any difference  between PGA
revenues and  recoverable  gas costs is deferred or accrued with a corresponding
decrease or increase  to cost of gas.  This  difference  is  amortized  as it is
collected from or refunded to customers through the PGA.

In the shipping segment, revenues and related delivery costs are recorded at the
time vessels depart from port.

Depreciation.  Property,  plant and equipment  are  depreciated  over  estimated
useful  lives  on  a  straight-line   basis.  The  gas  distribution   composite
depreciation rate is 4.1 percent.

Income  taxes.  Deferred  income taxes are provided  for  temporary  differences
between the tax basis of an asset or liability  and its  reported  amount in the
financial  statements.  Although  the  federal  investment  tax  credit has been
eliminated,  Nicor Gas continues to amortize  prior  deferred  amounts to income
over the lives of the applicable properties.

Cash and cash equivalents.  The company considers  investments  purchased with a
maturity of three months or less to be cash equivalents.

Receivable credit risk.  Nicor's major  subsidiaries  have diversified  customer
bases and prudent credit policies which mitigate risk.

NEW ACCOUNTING PRONOUNCEMENTS

In June 1998, the Financial  Accounting  Standards Board (FASB) issued Statement
No. 133, Accounting for Derivative  Instruments and Hedging Activities.  In June
1999,  the FASB issued  Statement No. 137,  which deferred the effective date of
FASB Statement No. 133.  Statement No. 133 requires that an entity recognize all
derivatives  as either  assets or  liabilities  on the balance sheet and measure
those instruments

<PAGE>


Nicor Inc.                                                               Page 27

Notes to the Consolidated Financial Statements (continued)

at fair value.  Gains or losses  resulting  from  changes in the values of those
derivatives  are to be accounted for depending on the use of the  derivative and
whether it  qualifies  for hedge  accounting.  Statement  No.  133,  as amended,
requires  adoption no later than the first quarter of the company's  2001 fiscal
year and must be  adopted  as a  cumulative  effect  of a change  in  accounting
principle.  The  company  plans to adopt  this  statement  on  January  1, 2001.
Implementation  is not  expected  to have a  material  impact  on the  company's
financial condition or results of operations.

GAS IN STORAGE

The gas  distribution  segment's  inventory  is  carried  at cost on a  last-in,
first-out  (LIFO) basis.  Based on the average cost of gas purchased in December
1999 and 1998, the estimated  replacement cost of inventory at December 31, 1999
and  1998,  exceeded  the  LIFO  cost by  $172.4  million  and  $159.1  million,
respectively.

Nicor's wholesale gas marketing  business carries its inventory at market value.
At December 31, 1999, the market value of the inventory was $8.9 million.

FAIR VALUE OF FINANCIAL INSTRUMENTS

The  recorded  amount  of  short-term   investments  and  short-term  borrowings
approximates fair value because of the short maturity of the instruments.  Based
on  quoted  market  interest  rates,  the  recorded  amount  of  long-term  debt
outstanding, including current maturities, also approximates fair value.

SHORT- AND LONG-TERM DEBT

The company  maintains  short-term  credit  agreements  with major  domestic and
foreign  banks.  These  agreements,  which  serve as backup for the  issuance of
commercial paper,  totaled $342.5 million at December 31, 1999.  Commitment fees
of up to .08 percent per annum were paid on these lines.  All credit  agreements
have variable interest rate options tied to short-term markets.

The  company  had  $342.5  million  and  $234.5  million  of  commercial   paper
outstanding with a weighted average interest rate of 5.9 percent and 5.6 percent
at December 31, 1999 and 1998, respectively.

Bank cash  balances  averaged  about $3 million  during  1999,  which  partially
compensated  for the cost of  maintaining  accounts and other banking  services.
Such demand balances may be withdrawn at any time.

First mortgage bonds are secured by liens on substantially  all gas distribution
property.



<PAGE>


Nicor Inc.                                                               Page 28

Notes to the Consolidated Financial Statements (continued)

INCOME TAXES

The components of income tax expense are presented below:

(millions)                            1999         1998         1997
                                   ------------ ------------ ------------
Current
    Federal                        $     44.3   $     36.4   $     71.3
    State                                 8.2          7.9         14.1
                                   ------------ ------------ ------------
                                         52.5         44.3         85.4
                                   ------------ ------------ ------------
Deferred
    Federal                              13.9         16.6         (8.4)
    State                                  .5          2.0         (5.9)
                                   ------------ ------------ ------------
                                         14.4         18.6        (14.3)
                                   ------------ ------------ ------------

Amortization of investment
    tax credits, net                     (1.5)        (2.1)        (2.2)
Foreign taxes                              .3           .3           .1
                                   ------------ ------------ ------------
Income tax expense                 $     65.7   $     61.1   $     69.0
                                   ============ ============ ============

The temporary  differences  which gave rise to the net deferred tax liability at
December 31, 1999 and 1998, are as follows:

(millions)                                        1999         1998
                                               -----------  -----------
Deferred tax liabilities
    Property, plant and equipment              $    222.9   $    231.7
    Investment in foreign subsidiaries               43.8         43.5
    Investment in partnerships                       24.5          8.5
    Other                                            31.9         15.5
                                               ------------ ------------
                                                    323.1        299.2
                                               ------------ ------------
Deferred tax assets
    Unamortized investment tax credits               27.8         29.0
    Regulatory income tax liability                  18.6         19.7
    Other                                            20.2         23.4
                                               ------------ ------------
                                                     66.6         72.1
                                               ------------ ------------
Net deferred tax liability                     $    256.5   $    227.1
                                               ============ ============

The effective combined federal and state income tax rate was 34.6 percent,  34.4
percent  and 35.1  percent  in 1999,  1998 and 1997,  respectively.  Differences
between  federal  income taxes  computed  using the statutory  rate and reported
income tax expense are shown below:

(millions)                              1999         1998         1997
                                     ------------ ------------ ------------
Federal income taxes using
  statutory rate                     $     66.5   $     62.1   $     68.9
State income taxes, net                     6.3          6.7          5.6
Other, net                                 (7.1)        (7.7)        (5.5)
                                     ------------ ------------ ------------
Income tax expense                   $     65.7   $     61.1   $     69.0
                                     ============ ============ ============



<PAGE>


Nicor Inc.                                                               Page 29

Notes to the Consolidated Financial Statements (continued)

STOCK-BASED COMPENSATION

Nicor has a long-term incentive  compensation plan which permits the granting of
stock options, restricted stock and alternate stock rights to key executives and
managerial  employees,  as well as an employee  stock purchase plan. The company
does not recognize compensation expense for these plans. If compensation expense
for these  plans had been  recognized  based on the fair  value of awards at the
grant dates, the impact on the company's net income and earnings per share would
not have been material.

Long-term  incentive  compensation plan. The company may grant options for up to
3.5  million  shares and has  granted  options  on 1.7  million  shares  through
December 31, 1999.  The stock option  exercise  price equals the stock's  market
price on the date of grant.  Options are vested after one year, generally become
exercisable after three years and expire after ten years.

A summary of stock option activity is presented below:

                                                                Weighted
                                                                 average
                                                  Number of     exercise
                                                    shares        price
                                                  ------------ ------------
Options outstanding at:
December 31, 1996                                    627,500   $    26.41
                                                  ------------
    Granted                                          134,400        32.25
    Exercised                                        (63,500)       24.77
    Cancelled                                        (25,500)       28.29
                                                  ------------
December 31, 1997                                    672,900        27.70
                                                  ------------
    Granted                                          113,500        40.56
    Exercised                                       (158,100)       26.05
    Cancelled                                         (4,500)       40.63
                                                  ------------
December 31, 1998                                    623,800        30.37
                                                  ------------
   Granted                                           149,000        38.06
   Exercised                                          (3,500)       28.25
   Cancelled                                          (7,500)       38.06
                                                  ------------
December 31, 1999                                    761,800        31.81
                                                  ------------

Options exercisable at:
December 31, 1997                                    212,000   $    27.71
December 31, 1998                                    264,500        26.25
December 31, 1999                                    383,900        26.87

Stock options outstanding at December 31, 1999, had exercise prices ranging from
$19.63 to $40.69  and a weighted  average  remaining  contractual  life of seven
years.

The weighted average fair value of options granted in 1999 and 1998 is $3.52 and
$4.52, respectively.  The fair value of each option was estimated on the date of
grant  using  the   Black-Scholes   option-pricing   model  with  the  following
assumptions  used for grants in 1999 and 1998,  respectively:  dividend yield of
4.6 percent  and 3.9  percent;  volatility  of 14.7  percent  and 14.5  percent;
risk-free  interest  rate of 5.2 percent and 5.6 percent;  and expected  periods
outstanding of three years for both years.

There were no shares of restricted  stock or alternate stock rights  outstanding
at December 31, 1999.


Nicor Inc.                                                               Page 30

Notes to the Consolidated Financial Statements (continued)

Employee  stock  purchase  plan.  Under the employee  stock  purchase  plan, the
company may sell up to 1.5 million  shares of common stock to its  employees and
has sold about 858,000 shares through December 31, 1999. Under the terms of this
plan, eligible employees may purchase shares at 90 percent of the stock's market
price.  The company sold about 28,400  shares and 19,900  shares to employees in
1999 and 1998, respectively. The weighted average market value of shares sold in
1999 and 1998 was $36.71 and $42.88, respectively.

POSTRETIREMENT BENEFITS

Nicor Gas maintains  noncontributory  defined  benefit  pension  plans  covering
substantially  all employees  hired prior to January 1, 1998 and provides health
care  and  life  insurance  benefits  to  eligible  retired  employees.  Certain
employees'  postretirement  health care  benefits  have been capped to a defined
annual per capita medical cost. The following table sets forth the components of
the  changes in the plans'  benefit  obligations  and assets for the years ended
October 1 and  reconciles  the October 1 funded status to the prepaid  (accrued)
benefit cost recorded in the financial statements at December 31:

<TABLE>
<CAPTION>

                                        Pension benefits             Other benefits
                                    --------------------------  -------------------------
(millions)                              1999         1998          1999         1998
                                    ------------- ------------  ------------ ------------
Change in benefit obligation
<S>                                 <C>           <C>           <C>          <C>
Benefit obligation at beginning of
    period                          $    242.3    $   223.9     $    118.3   $    115.0
Service cost                               6.4          6.7            1.3          1.3
Interest cost                             15.7         16.0            7.7          8.3
Actuarial (gain) loss                    (25.8)        18.5           (1.0)          .9
Participant contributions                    -            -             .6           .7
Benefits paid                            (23.8)       (22.8)         (10.8)        (7.9)
                                    ------------- ------------  ------------ ------------
Benefit obligation at end of period      214.8        242.3          116.1        118.3
                                    ------------- ------------  ------------ ------------

Change in plan assets
Fair value of plan assets at
    beginning of period                  401.7        422.6           16.6         16.6
Actual return on plan assets              67.1          1.5            2.8            -
Employer contributions                      .3           .4           10.2          7.2
Participant contributions                    -            -             .6           .7
Benefits paid                            (23.8)       (22.8)         (10.8)        (7.9)
                                    ------------- ------------  ------------ ------------
Fair value of plan assets at end of
    period                               445.3        401.7           19.4         16.6
                                    ------------- ------------  ------------ ------------

Funded status                            230.5        159.4          (96.7)      (101.7)
Unrecognized net actuarial (gain)
    loss                                (119.0)       (61.7)           3.9          6.4
Unrecognized transition (asset)
    obligation                            (8.6)       (12.5)          40.2         43.2
Unrecognized prior service cost            3.0          3.3              -            -
Other                                      4.7          3.2           (1.1)          .8
                                    ------------- ------------  ------------ ------------
Prepaid (accrued) benefit cost      $    110.6    $    91.7     $    (53.7)  $    (51.3)
                                    ============= ============  ============ ============

Assumptions used in the computations included the following:

                                         Pension benefits              Other benefits
                                    ---------------------------  ---------------------------
                                        1999          1998           1999          1998
                                    ------------- -------------  -------------  ------------
Discount rate                             7.50%         6.75%          7.50%         6.75%
Expected return on plan assets            9.00          9.00           9.00          9.00
Rate of compensation increase             4.00          4.00           4.00          4.00
</TABLE>

Nicor Inc.                                                               Page 31

Notes to the Consolidated Financial Statements (continued)

For  measurement  purposes,  the health  care cost  trend rate for  pre-Medicare
benefits  was assumed to be 7 percent for 2000,  declining  to 5 percent by 2004
and  remaining  at that level  thereafter.  The health  care cost trend rate for
post-Medicare benefits was assumed to be 5 percent.

Net periodic benefit cost (credit) included the following components:
<TABLE>
<CAPTION>

                                       Pension benefits               Other benefits
                                 ----------------------------- -----------------------------
(millions)                         1999      1998      1997      1999      1998      1997
                                 --------- --------- --------- --------- --------- ---------
<S>                              <C>       <C>       <C>       <C>       <C>       <C>
Service cost                     $   6.4   $   6.7   $   6.5   $  1.3    $  1.3    $  1.7
Interest cost                       15.7      16.0      17.6      7.7       8.3       8.3
Expected return on plan
    assets                         (35.3)    (35.1)    (31.6)    (1.6)     (1.4)     (1.2)
Recognized net actuarial gain       (1.8)     (4.7)     (1.6)       -         -         -
Amortization of unrecognized
    transition (asset) obligation   (3.8)     (3.8)     (3.8)     3.1       3.1       3.3
Amortization of prior service
    cost                              .3        .4        .4        -         -         -
                                 --------- --------- --------- --------- --------- ---------
Net periodic benefit cost
    (credit)                     $ (18.5)  $ (20.5)  $ (12.5)  $ 10.5    $ 11.3    $ 12.1
                                 ========= ========= ========= ========= ========= =========
</TABLE>

Assumed  health  care  cost  trend  rates can have a  significant  effect on the
amounts reported for the health care plans. A one-percentage-point change in the
assumed health care cost trend rates would have the following effects:

                                                    One-percent
                                              -------------------------
(millions)                                     Increase     Decrease
                                              ------------ ------------
Effect on total of service and
   interest cost components                   $      1.1   $      (.9)
Effect on benefit obligation                        12.0        (10.1)


BUSINESS SEGMENT AND GEOGRAPHIC INFORMATION

Nicor is a holding company that through its wholly owned subsidiaries, Nicor Gas
and Tropical Shipping,  operates in two separately managed reportable  segments:
gas distribution and shipping.  The gas distribution segment,  Nicor's principal
business,  serves more than 1.9 million  customers in a service  territory  that
encompasses  most of the  northern  third  of  Illinois,  excluding  the city of
Chicago. The shipping segment transports  containerized  freight between Florida
and the Caribbean.  Other Nicor ventures include energy-related  businesses that
participate  in the following  activities:  wholesale  marketing of natural gas;
natural gas supply services; power generation;  product testing, development and
commercialization  for the natural gas industry;  and providing  residential and
commercial HVAC service contracts.

Nicor evaluates  segment  performance  based on operating  income.  Intercompany
billing among segments is based on direct and indirect costs incurred. Financial
data by business segment is presented on the following page:


Nicor Inc.                                                             Page 32
- -------------------------------------------------------------------------------

Notes to the Consolidated Financial Statements (continued)

                                                Other     Corporate
                            Gas                 Nicor       and        Consol-
                       distribution Shipping   ventures  eliminations  idated
- -------------------------------------------------------------------------------

(millions)
Operating revenues
   1999                  $1,326.2    $ 229.9     $ 61.0      $ (1.9) $ 1,615.2
   1998                   1,229.0      224.5       11.6           -    1,465.1
   1997                   1,730.5      213.1       58.7        (9.7)   1,992.6

Operating income (loss)
   1999                   $ 191.7     $ 22.5      $ 1.3      $ (3.5)   $ 212.0
   1998                     185.5       27.6       (1.9)       (2.6)     208.6
   1997                     210.1       25.3       (1.0)       (4.6)     229.8

Interest on debt, net
   1999                    $ 40.4      $ 1.3       $ .2       $ 3.2     $ 45.1
   1998                      43.4        1.3         .2         1.7       46.6
   1997                      45.9        1.9         .2         1.1       49.1

Income taxes
   1999                    $ 55.9      $ 8.3      $ 2.6      $ (1.1)    $ 65.7
   1998                      55.3       10.2        (.9)       (3.5)      61.1
   1997                      64.7        9.1        (.5)       (4.3)      69.0

Property, plant and
  equipment, net
   1999                 $ 1,610.7    $ 123.2      $ 1.3     $     -  $ 1,735.2
   1998                   1,617.8      113.3         .7           -    1,731.8
   1997                   1,629.9      105.6         .3           -    1,735.8

Capital expenditures
   1999                   $ 127.4     $ 26.0       $ .6     $     -    $ 154.0
   1998                     112.6       23.3         .3           -      136.2
   1997                     101.8       10.9         .3           -      113.0

Depreciation
   1999                   $ 123.9     $ 16.1       $ .3     $     -    $ 140.3
   1998                     120.8       15.4         .3           -      136.5
   1997                     116.6       14.2         .4           -      131.2

See  Gas  Distribution  Statistics  on  page  15 for  disclosure  of  sales  and
transportation revenues in the gas distribution segment.

Tropical  Shipping's  vessels are under foreign  registry and its containers are
considered  instruments  of  international  trade.  Although the majority of its
long-lived  assets are foreign  owned and its  revenues are derived from foreign
operations, the functional currency is generally the U.S. dollar.




<PAGE>


Nicor Inc.                                                               Page 33

Notes to the Consolidated Financial Statements (continued)

DISCONTINUED OPERATIONS

The company  maintains a reserve for the remaining costs related to discontinued
contract  drilling,  oil and gas  exploration,  inland  barging  and  extractive
operations.  The reserve will continue to be evaluated as the remaining  medical
benefit,  legal, tax and other contingencies are resolved.  Due to the long-term
nature of the  medical  benefit  obligation,  no  adjustment  to the  reserve is
anticipated in the near future.

COMMON STOCK

Shareholder  rights plan. In 1997,  the company's  Board of Directors  adopted a
shareholder rights plan. Under the plan, shareholders of record on September 30,
1997,  were  assigned one right for each share of Nicor  common stock held.  The
rights will be  exercisable  only if a person  acquires,  or  announces a tender
offer that would result in,  ownership  of 10 percent or more of Nicor's  common
stock.  If a person  acquires  beneficial  ownership  of 10  percent  or more of
Nicor's common stock, all holders of rights other than the acquiring person will
be entitled to purchase  Nicor  common stock at a 50 percent  discount  from the
market  price.  Nicor may redeem the rights at $.01 per right at any time before
someone becomes a 10 percent  beneficial  owner.  The rights expire on September
30, 2007.

Changes in common shares.  Changes in common shares  outstanding  are summarized
below:

(millions)                            1999         1998         1997
                                   ------------ ------------ ------------
Beginning of year                        47.5         48.2         49.5
Issued and converted                        -           .1           .1
Reacquired and cancelled                  (.6)         (.8)        (1.4)
                                   ------------ ------------ ------------
End of year                              46.9         47.5         48.2
                                   ============ ============ ============

Through  common stock  repurchase  programs,  Nicor has purchased and retired .6
million, .7 million and 1.3 million shares in 1999, 1998 and 1997, respectively.

REGULATORY MATTERS

On January 1, 2000, Nicor Gas' performance-based rate (PBR) plan for natural gas
costs went into effect. Under the PBR, Nicor Gas' total gas supply costs will be
compared to a benchmark tied to a market index.  Savings and losses  relative to
the benchmark  will be shared equally with  customers.  At the end of two years,
the plan will be subject to ICC review.

COMMITMENTS

The company has committed about $40 million for the construction of two vessels.
Payments are scheduled as construction progresses over the next three years.


<PAGE>


Nicor Inc.                                                               Page 34

Notes to the Consolidated Financial Statements (concluded)

CONTINGENCIES

The company is involved in legal or  administrative  proceedings  before various
courts and agencies with respect to rates, taxes and other matters.

Current  environmental  laws may require cleanup of certain former  manufactured
gas plant sites.  To date,  Nicor Gas has identified more than 40 properties for
which it may, in part, be responsible.  The majority of these properties are not
presently owned by the company.  Information  regarding preliminary site reviews
has been  presented  to the  Illinois  Environmental  Protection  Agency,  which
oversees the  company's  investigations  and  remedial  actions.  More  detailed
investigations  and  remedial  activities  have  either been  completed,  are in
progress or are being  planned at many of these sites.  The results of continued
testing and analysis should determine to what extent  additional  remediation is
necessary and may provide a basis for  estimating  any  additional  future costs
which, based on industry  experience,  could be significant.  In accordance with
ICC  authorization,  the  company  has  been  recovering  these  costs  from its
customers.

On December 20, 1995,  Nicor Gas filed suit in the Circuit  Court of Cook County
against certain  insurance  carriers seeking  recovery of environmental  cleanup
costs of certain former  manufactured  gas plant sites.  Nicor Gas has reached a
settlement with one of the insurance carriers. In January 2000, the court stated
it would  dismiss  the  company's  case on summary  judgment  motions by certain
defendants.  If  dismissed  by  written  order,  the  company  plans to  appeal.
Management  cannot  predict  the outcome of the  lawsuit  against the  remaining
insurance carriers. Any recoveries will be refunded to the company's customers.

Although  unable to  determine  the outcome of these  contingencies,  management
believes that  appropriate  accruals have been  recorded.  Final  disposition of
these  matters  is not  expected  to have a  material  impact  on the  company's
financial condition or results of operations.

QUARTERLY RESULTS (UNAUDITED)

Quarterly  results  fluctuate  due  mainly  to the  seasonal  nature  of the gas
distribution business.
<TABLE>
<CAPTION>

                                                        Quarter ended
                                      ---------------------------------------------------
(millions, except per share data)       Mar. 31      June 30     Sept. 30      Dec. 31
                                      ------------ ------------ ------------ ------------

1999
<S>                                   <C>          <C>          <C>          <C>
    Operating revenues                $    576.4   $    271.8   $    227.3   $    539.7
    Operating income                        65.4         44.5         38.1         64.0
    Net income                              39.0         26.5         19.8         39.1
    Earnings per common share
        Basic                                .82          .56          .42          .83
        Diluted                              .82          .56          .42          .83

1998
    Operating revenues                $    562.3   $    271.3   $    203.2   $    428.2
    Operating income                        64.9         48.9         38.9         55.8
    Net income                              36.2         28.5         20.6         31.1
    Earnings per common share
        Basic                                .75          .59          .43          .65
        Diluted                              .75          .59          .43          .65
</TABLE>


Nicor Inc.                                                               Page 35

Item 9.    Changes in and Disagreements with Accountants on Accounting and
           Financial Disclosure

None.


PART III

Items 10. and 11.     Directors and Executive Officers of the Registrant and
                      Executive Compensation

Information  on  directors,   Section  16(a)  Beneficial   Ownership   Reporting
Compliance and executive  compensation  is contained on pages 2 through 6, 8 and
14 through 19 of the  Definitive  Proxy  Statement,  dated March 8, 2000, and is
incorporated herein by reference. Information relating to the executive officers
of the registrant is provided on pages 6 and 7 in Part I of this document.

Item 12.       Security Ownership of Certain Beneficial Owners and Management

Information about shares  beneficially owned by directors and executive officers
is contained on pages 7 and 8 of the Definitive Proxy Statement,  dated March 8,
2000, and is incorporated herein by reference.

Item 13.       Certain Relationships and Related Transactions

None.




<PAGE>


Nicor Inc.                                                               Page 36

PART IV

Item 14.       Exhibits, Financial Statement Schedules, and Reports on Form 8-K

(a)   1)  Financial Statements:

          See Item 8, Financial  Statements and  Supplementary  Data, on page 19
          filed herewith, for a list of financial statements.

      2)  Financial Statement Schedules:

          Schedule
           Number                                                       Page

                      Report of Independent Public Accountants            20
              II      Valuation and Qualifying Accounts                   37

          Schedules  other than those  listed are omitted  because  they are not
           applicable.

      3)  Exhibits Filed:

          See Exhibit Index beginning on page 39 filed herewith.

(b) The company  did not file a report on Form 8-K during the fourth  quarter of
1999.



<PAGE>


Nicor Inc.                                                             Page 37
- -------------------------------------------------------------------------------

Schedule II

VALUATION AND QUALIFYING ACCOUNTS
(millions)

                                        Additions
                                   --------------------
                       Balance at  Charged to  Charged to              Balance
                       beginning   costs and    other                  at end
   Description         of period   expenses    accounts    Deductions  of period
- -------------------    --------    --------    --------    --------    --------

1999
- -------

   Allowance
     for uncollectible
     accounts  receivable $ 6.3      $ 12.5         $ -      $ 11.7 (a)   $ 7.1
   Reserve for estimated
     future costs related
     to discontinued
     businesses (b)         6.3           -          .1 (c)       -         6.4


1998
- -------

   Allowance
     for uncollectible
     accounts  receivable $ 8.6      $ 13.6         $ -      $ 15.9 (a)   $ 6.3
   Reserve for estimated
     future costs related
     to discontinued
     businesses (b)        11.7           -           -         5.4 (c)     6.3


1997
- -------

   Allowance
     for uncollectible
     accounts  receivable $ 7.7      $ 16.0         $ -      $ 15.1 (a)   $ 8.6
   Reserve for estimated
     future costs related
     to discontinued
     businesses (b)        14.5           -           -         2.8 (c)    11.7


(a) Accounts receivable written off, net of recoveries.
(b) Excludes the related reserve for federal and state income taxes.
(c)  Net receipts, expenditures,  operating results, gains and losses related to
     discontinued businesses credited or charged to reserve.




Nicor Inc.                                                               Page 38

Signatures

Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  registrant  has duly  caused  this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

                                         Nicor Inc.

Date       March 20, 2000                By       DAVID L. CYRANOSKI
      -------------------------              -----------------------------
                                                     David L. Cyranoski
                                                     Senior Vice President,
                                                     Secretary, Treasurer and
                                                     Controller

Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following  persons on behalf of the  registrant and
in the capacities indicated on March 20, 2000.

                 Signature                                    Title
- ---------------------------------------------        ---------------------------

              THOMAS L. FISHER
- ---------------------------------------------
              Thomas L. Fisher                       Chairman, President and
       (Principal Executive Officer)                 Chief Executive Officer

            KATHLEEN L. HALLORAN
- ---------------------------------------------
            Kathleen L. Halloran                     Executive Vice President
       (Principal Financial Officer)                 Finance and Administration

             DAVID L. CYRANOSKI
- ---------------------------------------------
             David L. Cyranoski                      Senior Vice President,
       (Principal Accounting Officer)                Secretary,Treasurer and
                                                     Controller

ROBERT M. BEAVERS, JR.*                              Director

BRUCE P. BICKNER*                                    Director

JOHN H. BIRDSALL, III*                               Director

THOMAS A. DONAHOE*                                   Director

DENNIS J. KELLER*                                    Director

CHARLES S. LOCKE*                                    Director

WILLIAM A. OSBORN*                                   Director

SIDNEY R. PETERSEN*                                  Director

JOHN RAU*                                            Director

PATRICIA A. WIER*                                    Director

                                                  *  By       MARIANNE T. LORENZ
                                                              Marianne T. Lorenz
                                                              (Attorney-in-fact)

Nicor Inc.                                                               Page 39


Exhibit Index

Exhibit
Number                                      Description of Document

3.01 * Articles of Incorporation of the company.  (File No. 2-55451,  Form S-14,
Nicor Inc., Exhibit 1-03 and Exhibit B of Amendment No. 1 thereto.)

3.02 * Amendment to Articles of Incorporation  of the company.  (Proxy Statement
dated April 20, 1979, Nicor Inc., Item 3 thereto.)

3.03 * Amendment to Articles of Incorporation of the company. (File No. 2-68777,
Form S-16, Nicor Inc., Exhibit 2-01.)

3.04 * Amendment to Articles of Incorporation of the company.  (File No. 1-7297,
Form 10-K for 1985, Nicor Inc., Exhibit 3-03.)

3.05 * Amendment to Articles of Incorporation  of the company.  (Proxy Statement
dated March 12, 1987, Nicor Inc., Exhibit A and Exhibit B thereto.)

3.06 * Amendment to Articles of Incorporation of the company.  (File No. 1-7297,
Form 10-K for 1992, Nicor Inc., Exhibit 3-06.)

3.07 * Amendments to Articles of Incorporation of the company.  (Proxy Statement
dated March 9, 1994, Nicor Inc., Exhibit A-1 and Exhibit B thereto.)

3.08 * Amendment to Articles of Incorporation  of the company.  (Proxy Statement
dated March 6, 1998, Nicor Inc., Item 2 thereto.)

3.09 * By-Laws of the company as amended by the company's  board of Directors on
May 3, 1995.  (File No. 1-7297,  Form 10-Q for March 1995,  Nicor Inc.,  Exhibit
3(ii).01.)

4.01 * Indenture of Commonwealth Edison Company to Continental Illinois National
Bank and Trust Company of Chicago,  Trustee,  dated as of January 1, 1954. (File
No. 1-7296, Form 10-K for 1995, Nicor Gas, Exhibit 4.01.)

4.02 * Indenture of Adoption of Nicor Gas to Continental  Illinois National Bank
and Trust Company of Chicago, Trustee, dated February 9, 1954. (File No. 1-7296,
Form 10-K for 1995, Nicor Gas, Exhibit 4.02.)

4.03 * Supplemental  Indenture,  dated June 1, 1963, of Nicor Gas to Continental
Illinois  National Bank and Trust Company of Chicago,  Trustee,  under Indenture
dated as of January 1, 1954.  (File No.  2-21490,  Form S-9, Nicor Gas,  Exhibit
2-8.)

4.04 *  Supplemental  Indenture,  dated May 1, 1966, of Nicor Gas to Continental
Illinois  National Bank and Trust Company of Chicago,  Trustee,  under Indenture
dated as of January 1, 1954.  (File No.  2-25292,  Form S-9, Nicor Gas,  Exhibit
2-4.)





<PAGE>


Nicor Inc.                                                               Page 40


Exhibit Index (continued)

Exhibit
Number                                      Description of Document

4.05 * Supplemental  Indenture,  dated June 1, 1971, of Nicor Gas to Continental
Illinois  National Bank and Trust Company of Chicago,  Trustee,  under Indenture
dated as of January 1, 1954.  (File No.  2-44647,  Form S-7, Nicor Gas,  Exhibit
2-03.)

4.06 *  Supplemental  Indenture,  dated April 30, 1976,  between the company and
Continental Illinois National Bank and Trust Company of Chicago,  Trustee, under
Indenture dated as of January 1, 1954.  (File No. 2-56578,  Form S-9, Nicor Gas,
Exhibit 2-25.)

4.07 * Supplemental Indenture, dated April 30, 1976, of Nicor Gas to Continental
Illinois  National Bank and Trust Company of Chicago,  Trustee,  under Indenture
dated as of January 1, 1954.  (File No.  2-56578,  Form S-9, Nicor Gas,  Exhibit
2-21.)

4.08  *  Supplemental  Indenture,  dated  August  15,  1991,  of  Nicor  Gas  to
Continental Bank,  National  Association,  Trustee,  under Indenture dated as of
January 1, 1954. (File No. 1-7296,  Form 8-K for August 1991, Nicor Gas, Exhibit
4-01.)

4.09 * Supplemental  Indenture,  dated October 15, 1995, of Nicor Gas to Bank of
America  Illinois,  Trustee,  under Indenture dated as of January 1, 1954. (File
No. 1-7296, Form 10-Q for September 1995, Nicor Gas, Exhibit 4.01.)

4.10 * Supplemental Indenture,  dated May 10, 1996, of Nicor Gas to Harris Trust
and Savings Bank,  Trustee,  under Indenture dated as of January 1, 1954.  (File
No. 1-7296, Form 10-Q for June 1996, Nicor Gas, Exhibit 4.01.)

4.11 *  Supplemental  Indenture,  dated  August 1, 1996,  of Nicor Gas to Harris
Trust and Savings Bank,  Trustee,  under  Indenture dated as of January 1, 1954.
(File No. 1-7296, Form 10-Q for June 1996, Nicor Gas, Exhibit 4.02.)

4.12 * Supplemental Indenture,  dated June 1, 1997, of Nicor Gas to Harris Trust
and Savings Bank,  Trustee,  under Indenture dated as of January 1, 1954.  (File
No. 1-7296, Form 10-Q for June 1997, Nicor Gas, Exhibit 4.01.)

4.13 *  Shareholder  Rights  Agreement,  dated  September  9, 1997,  between the
company and Harris Trust and Savings Bank, as Rights  Agent.  (File No.  1-7297,
Form 8-K for September 1997, Nicor Inc., Exhibit 1.)

4.14 *  Supplemental  Indenture,  dated October 15, 1997, of Nicor Gas to Harris
Trust and Savings Bank,  Trustee,  under  Indenture dated as of January 1, 1954.
(File No. 1-7296, Form 10-Q for September 1997, Nicor Gas, Exhibit 4.01.)

4.15 * Supplemental  Indenture,  dated February 15, 1998, of Nicor Gas to Harris
Trust and Savings Bank,  Trustee,  under  Indenture dated as of January 1, 1954.
(File No. 1-7296, Form 10-K for 1997, Nicor Gas, Exhibit 4.19.)




<PAGE>


Nicor Inc.                                                               Page 41

Exhibit Index (continued)

Exhibit
Number                                      Description of Document

4.16 * Supplemental Indenture,  dated June 1, 1998, of Nicor Gas to Harris Trust
and Savings Bank,  Trustee,  under Indenture dated as of January 1, 1954.  (File
No. 1-7296, Form 10-Q for June 1998, Nicor Gas, Exhibit 4.01.)

4.17 *  Supplemental  Indenture,  dated February 1, 1999, of Nicor Gas to Harris
Trust and Savings Bank,  Trustee,  under  Indenture dated as of January 1, 1954.
(File No. 1-7296, Form 10-K for 1998, Nicor Gas, Exhibit 4.19.)

Other debt instruments are omitted in accordance with Item  601(b)(4)(iii)(A) of
Regulation  S-K.  Copies of such  agreements will be furnished to the Commission
upon request.

10.01 * 1984 Nicor Officers' Capital Accumulation Plan Participation  Agreement.
(File No. 1-7297, Form 10-K for 1988, Nicor Inc., Exhibit 10-10.)

10.01(a)  *  1985  Nicor  Officers'  Capital   Accumulation  Plan  Participation
Agreement. (File No. 1-7297, Form 10-K for 1988, Nicor Inc., Exhibit 10-10(a).)

10.02 * 1984 Nicor Directors' Capital Accumulation Plan Participation Agreement.
(File No. 1-7297, Form 10-K for 1983, Nicor Inc., Exhibit 10-13.)

10.02(a)  *  1985  Nicor  Directors'  Capital  Accumulation  Plan  Participation
Agreement. (File No. 1-7297, Form 10-K for 1984, Nicor Inc., Exhibit 10-13(a).)

10.03 * Directors'  Deferred  Compensation Plan. (File No. 1-7297, Form 10-K for
1983, Nicor Inc., Exhibit 10-16.)

10.04 * Directors'  Pension Plan.  (File No. 1-7297,  Form 10-K for 1985,  Nicor
Inc., Exhibit 10-18.)

10.05 * Flexible  Spending Account for Executives.  (File No. 1-7297,  Form 10-K
for 1986, Nicor Inc., Exhibit 10-20.)

10.06 * Amendment and Restatement of the Nicor Gas Incentive  Compensation Plan.
(File No. 1-7297, Form 10-K for 1986, Nicor Inc., Exhibit 10-21.)

10.07 * Nicor Inc. 1989 Long-Term  Incentive Plan.  (Filed with Nicor Inc. Proxy
Statement, dated April 20, 1989, Exhibit A.)

10.08 * Nicor Gas Supplementary Retirement Plan. (File No. 1-7297, Form 10-K for
1989, Nicor Inc., Exhibit 10-24.)

10.09 * Nicor Gas  Supplementary  Savings Plan. (File No. 1-7297,  Form 10-K for
1989, Nicor Inc., Exhibit 10-25.)


Nicor Inc.                                                               Page 42

Exhibit Index (continued)

Exhibit
Number                                      Description of Document

10.10 * Nicor Salary Deferral Plan. (File No. 1-7297,  Form 10-K for 1989, Nicor
Inc., Exhibit 10-29.)

10.11 * Nicor  Inc.  Stock  Deferral  Plan.  (File  No.  1-7297,  Form  10-Q for
September 1996, Nicor Inc., Exhibit 10.01.)

10.12 * Amendment to Nicor Inc. Stock Deferral Plan. (File No. 1-7297, Form 10-K
for 1997, Nicor Inc., Exhibit 10.22.)

10.13 * Nicor Inc. 1995 Directors' Stock Plan.  (File No. 1-7297,  Form 10-Q for
September 1996, Nicor Inc., Exhibit 10.02.)

10.14 * 1995 Long-Term Incentive Program.  (File No. 1-7297, Form 10-K for 1994,
Nicor Inc., Exhibit 10.17.)

10.15 * 1997 Long-Term Incentive Program.  (File No. 1-7297, Form 10-Q for March
1997, Nicor Inc., Exhibit 10.01.)

10.16 * Nicor Inc. 1997 Long-Term  Incentive Plan.  (Filed as an appendix to the
Nicor Inc. Proxy Statement, dated March 6, 1997.)

10.17 * 1998 Long-Term Incentive Program.  (File No. 1-7297, Form 10-K for 1997,
Nicor Inc., Exhibit 10.25.)

10.18 * 1999 Nicor Incentive  Compensation Plan. (File No. 1-7297, Form 10-K for
1998, Nicor Inc. , Exhibit 10.24.)

10.19 * 1999 Nicor Gas Incentive  Compensation Plan. (File No. 1-7297, Form 10-K
for 1998, Nicor Inc., Exhibit 10.25.)

10.20 * 1999 Long-Term Incentive Program.  (File No. 1-7297, Form 10-K for 1998,
Nicor Inc. Exhibit 10.26.)

10.21 2000 Nicor Incentive Compensation Plan.

10.22 2000 Nicor Gas Incentive Compensation Plan.

10.23 2000 Long-Term Incentive Program.

10.24 Security Payment Plan.

10.25 Letter Agreement,  executed January 19, 2000,  between Mr. Nardi and Nicor
Inc.




Nicor Inc.                                                               Page 43

Exhibit Index (concluded)

Exhibit
Number                                      Description of Document

10.26 Resolutions adopted by the Board of Directors on December 7, 1999 amending
the Nicor Inc.  Stock  Deferral  Plan and amending the  definition  of change in
control in the Long-Term  Incentive  Plan,  Salary Deferral Plan and the Capital
Accumulation Plan.

10.27  Summary of proposed  change in control  agreements  between Nicor and Mr.
Fisher,  Mr.  Cali and Ms.  Halloran  (incorporated  by  reference  to the third
paragraph under "Change in Control  Arrangements"  of Nicor Inc. Proxy Statement
dated March 8, 2000, Nicor Inc., File No. 1-7297.)


Exhibits 10.01 through 10.27  constitute  management  contracts and compensatory
plans and arrangements required to be filed as exhibits to this Form pursuant to
Item 14(c) of Form 10-K.

21.01 * Subsidiaries.  (File No. 69-228,  Form U-3A-2 for 1999, Nicor Inc., Item
1.)

23.01 Consent of Independent Public Accountants.

24.01 Powers of Attorney.

27.01 Financial Data Schedule.

99.01 * Form of Letter to Shareholders relating to Shareholder Rights Agreement.
(File No. 1-7297, Form 8-K for September 1997, Nicor Inc., Exhibit 2.)

*   These exhibits have been  previously  filed with the Securities and Exchange
    Commission as exhibits to  registration  statements or to other filings with
    the Commission  and are  incorporated  herein as exhibits by reference.  The
    file number and exhibit number of each such exhibit,  where applicable,  are
    stated, in parentheses, in the description of such exhibit.

Upon  written  request,  the company  will  furnish free of charge a copy of any
exhibit.  Requests  should  be  sent  to  Investor  Relations  at the  corporate
headquarters.




                                                                 Nicor Inc.
                                                                 Form 10-K
                                                                 Exhibit 10.21


                                     2000
                       NICOR INCENTIVE COMPENSATION PLAN

A.  The 2000 Nicor Incentive  Compensation  Plan is designed to link participant
    incentive  compensation to the accomplishment of important  objectives--both
    financial goals and defined  strategic  plans. It ties the pay an individual
    receives to his performance  and that of the company.  This plan is intended
    to provide a flexible framework for a performance bonus program for Nicor.

B.  Purpose

    The  purpose  of this Plan is to  provide  an annual  incentive  plan  which
    supports the longer-term strategic planning process. This is done by linking
    pay to the  performance  of tasks which  focus on  objectives  of  strategic
    importance.

C.  Eligible Group

    Officers of Nicor are eligible for  participation.  Participation  should be
    limited  to  those   employees  in  positions  which  enable  them  to  make
    significant contributions to the performance and growth of the company.

D.  Components of Plan

    Compensation Objective
    Bonus Targets
    Performance Targets
    Goal Setting Guidelines
    Program Schedule
    Form of Payment

    Compensation Objective

    Base Salary + Bonus Target = Short-Term Compensation Objective

    An individual's  short-term  compensation  objective will be based on salary
    plus a bonus,  expected to be earned if agreed-upon  performance targets are
    met.  Under  certain  conditions,  short-term  compensation  above  or below
    targets may be paid.





<PAGE>




                                       -2-



    Base  salaries  will  be  managed  at the  industry  average  which  will be
    determined  annually by survey data.  Bonus targets will be set based on the
    individual's  grade  level  and  compensation  objective,  such  that  total
    compensation  objectives  are  managed  at the  level as  determined  by the
    Compensation Committee to remain competitive with industry.

    Bonus Target

    The bonus target amount varies according to pay, salary grade and ability to
    impact the organization.  The higher  responsibility  and impact levels, the
    greater the dollars at risk.

    Performance Targets

    Performance  criteria focus on the achievement of agreed-upon and documented
    strategic  goals.  Performance  targets  may include  measures of  financial
    performance,  the  ability to meet  budget  levels and  individual  or group
    performance  objectives.  An individual's target may include all three types
    of goals,  weighted by the grade level and responsibilities  involved.  Each
    particular  performance  target will be assigned  weighting  reflected  as a
    percentage of compensation objective.

    Goal Setting Guidelines

    The most  important  aspect of this Plan will be in  establishing  effective
    goals. In addition to the goals which will be measured by company  financial
    performance,  realistic, operational management goals may be established and
    agreed  upon  by  both  the  participant  and his  supervisor  for  company,
    division, project or individual performance. As well as being realistic, the
    goals should be measurable  wherever  possible by  quantifiable  performance
    criteria.  It is  recognized  that  measurement  of some goals will  require
    subjective assessments on criteria mutually agreed between an individual and
    his/her supervisor.  Goals must be consistent with the longer-term strategic
    plan.

    A set of guidelines will be devised by the Nicor Human Resources  Department
    to aid in this process.  These guidelines will provide  direction as to goal
    formulation and reporting.

    Amount of bonus  payment for  financial/budget  related goals can vary above
    and below target based upon results achieved.  For targets met, bonus amount
    will be 100% of target. When targets are exceeded or are not reached,  bonus
    will be proportionately more or less than the target.


<PAGE>


                                     -3-


    Project or individual goals which are not quantifiable  will be evaluated by
    the  participant's  superior based on performance  and will fall into one of
    five  categories of  achievement:  unsatisfactory;  less than expected,  but
    acceptable given facts and circumstances;  expected; more than expected, but
    less than outstanding; and outstanding performance. Accordingly, performance
    at, below or above expected  performance  will result in awards  relative to
    performance.

    The  Compensation   Committee  may  make  appropriate   upward  or  downward
    adjustments  if,  after  taking  into  consideration  all of the  facts  and
    circumstances of the performance  period, it determines that adjustments are
    warranted.

    Plan Schedule

    The 2000 Nicor  Incentive  Compensation  Plan runs on a calendar year basis,
    with the strategic  planning cycle and budgeting process the primary link to
    performance and bonus targets. Responsibility for determination of financial
    results will be with the Accounting Department. A program for review will be
    established and individual,  project,  division or company goal  performance
    will be reviewed at least twice each performance year.

    Year-end  results  should be  available  and  evaluated  in  January  of the
    following year.  Following approval of the Compensation  Committee and Board
    at the January meeting, bonuses will be payable to participants.

    Form of Payment

    All awards  will be paid in cash,  except  that a  participant  in the Stock
    Deferral  Plan may elect to defer up to 50% of their  award  into that plan.
    Deferral elections must meet the guidelines and timing of the Stock Deferral
    Plan to be effective.  Appropriate taxes for the entire award amount will be
    withheld from the portion of the award being paid in cash.

    A participant  may elect by writing to the  Compensation  Committee prior to
    the end of the fiscal year to have all or a portion of the following  year's
    incentive  award deferred and paid in no more than five annual  installments
    beginning  either with the date of termination  or retirement,  or in a lump
    sum within six months after  termination  of  employment or  retirement.  In
    addition,  with the consent of the Compensation  Committee,  the participant
    may, at the time of making such election,  designate some other date for the
    commencement of such deferred payment. Further, the participant may submit a
    request  to  change  the  original  deferral  period.  The  request  must be
    submitted  in  writing  to the  Compensation  Committee  who will  take into
    consideration   the  particular   facts  and   circumstances  in  its  final
    determination.


<PAGE>


                                     -4-


    An amount which is deferred shall be credited with compounded interest equal
    to the prime rate applied on a quarterly basis.

E.  Integration with Existing Programs

    Base salaries will be managed with range  standards at the industry  average
    for comparable positions,  with total compensation  objectives to be managed
    at a level  appropriate with the performance of the company within industry,
    as determined by the Compensation Committee. Salaries will be monitored each
    year and increases granted based on merit and range standard.  Bonus targets
    will be set as a percentage of base salary. A change,  other than the annual
    salary review,  in the compensation  objective will customarily occur during
    the year only through  promotion to various  levels,  at which time the base
    salary and bonus target are also likely to change.

    Promotion of an employee during the year or reassignment to responsibilities
    in which new  performance  objectives  apply will result in proration of the
    existing  performance  objectives  and bonus  target and  assignment  of new
    performance  objectives  as  the  Compensation  Committee  shall  determine.
    Promotion  into  the  Plan  would  involve  a  promotional   increase,   but
    eligibility  for bonus would be delayed  unless the  participant  is able to
    produce  positive  results  in the  remaining  time,  as  determined  by the
    Compensation Committee.

    If a participant  voluntarily terminates or is terminated for cause prior to
    the end of the performance  period,  then no award shall be granted.  In the
    event a  participant  shall die,  become  disabled,  retire or is terminated
    without  cause  before  the  end  of  the  performance   period,   then  the
    Compensation   Committee  will   authorize   payment  of  an  award  to  the
    participant,   or  beneficiary,  in  such  amount  as  the  Committee  deems
    appropriate.

F.  Responsibility

    Acceptance  and  success of this Plan will depend on  documented,  realistic
    goals that are fair, understandable and measurable.  Considerable management
    focus  and  involvement  will  be  required  for  goals  to be  established,
    communicated and monitored.

    The Human Resources Department will be responsible for the administration of
    the system for the company. This will include:

    1)  monitoring industry salary and total compensation levels,

    2)  recommending   structural   changes  in  base  salary  and  compensation
        objective adjustments,


<PAGE>




                                     -5-


    3)  reviewing eligibility and performance targets,

    4)  monitoring performance targets through the Accounting Department,

    5)  communicating progress report to participants, and,

    6) progress and exception reporting to Compensation Committee.

    The 2000 Nicor  Incentive  Compensation  Plan and changes to its performance
    targets  and  measurement  criteria  will be  reviewed  and  approved by the
    Compensation Committee.

    In  establishing  the  actual  bonus  awards  to be made,  the  Compensation
    Committee  may take into  account all of the facts and  circumstances  which
    exist during the year and may make appropriate  upward or downward revisions
    in performance  criteria,  add or delete objectives,  or change the relative
    percentages assigned to the various performance objectives.

G.  Amendment and Termination

    The Board of Directors  may amend or terminate  the Plan at any time without
    the consent of the  participants.  No such  amendment or  termination  shall
    negatively  impact any  participant's  amount which  accrued  under the Plan
    prior to the calendar year in which the amendment is made.

    Summary

    The primary focus of this Plan is to link  employee and company  performance
    and  performance  bonus through an incentive plan. It provides the necessary
    emphasis on  accountability  for actions and decisions and enables people to
    gain  personally  through   significant  efforts  which  contribute  to  the
    company's present and future success.




                                                Nicor Human Resources
                                                       February 2000




                                                                 Nicor Inc.
                                                                 Form 10-K
                                                                 Exhibit 10.22



                                     2000
                     NICOR GAS INCENTIVE COMPENSATION PLAN


A.  The  2000  Nicor  Gas  Incentive  Compensation  Plan  is  designed  to  link
    participant  incentive  compensation  to  the  accomplishment  of  important
    objectives-both financial goals and defined strategic plans. It ties the pay
    an individual receives to his performance and that of the company. This plan
    is intended to provide a flexible  framework for a performance bonus program
    for Nicor Gas.

B.  Purpose

    The  purpose  of this Plan is to  provide  an annual  incentive  plan  which
    supports the longer-term strategic planning process. This is done by linking
    pay to the  performance  of tasks which  focus on  objectives  of  strategic
    importance.  The Plan also encourages teamwork among officer areas and among
    line and staff groups.

C.  Eligible Group

    Officers  of Nicor Gas in Salary  Grades  EX-1 or higher  are  eligible  for
    participation.  Participation  should  be  limited  to  those  employees  in
    positions  which  enable  them  to  make  significant  contributions  to the
    performance and growth of the company.

D.  Components of Plan

    Compensation Objective
    Bonus Targets
    Performance Targets
    Goal Setting Guidelines
    Program Schedule
    Form of Payment

    Compensation Objective

    Base Salary + Bonus Target = Short-Term Compensation Objective


<PAGE>




                                     -2-


    An individual's  short-term  compensation  objective will be based on salary
    plus a bonus,  expected to be earned if agreed-upon  performance targets are
    met.  Under  certain  conditions,  short-term  compensation  above  or below
    targets may be paid.

    Standards  for base  salaries  will be managed at the  appropriate  industry
    quartile which will be determined by survey data.  Bonus targets will be set
    based on the individual's grade level and compensation objective,  such that
    total compensation  objectives are managed at the level as determined by the
    Compensation Committee to remain competitive with industry.

    Bonus Target

    The bonus target amount varies according to pay, salary grade and ability to
    impact the  organization.  Higher  responsibility  and pay grade  results in
    greater dollars at risk.

    Performance Targets

    Performance  criteria focus on the achievement of agreed-upon and documented
    strategic  goals.  Performance  targets  may include  measures of  financial
    performance,  defined group objectives or individual performance objectives.
    Each particular performance target will be assigned weighting reflected as a
    percentage of bonus target.

    Goal Setting Guidelines

    The most  important  aspect of this Plan will be in  establishing  effective
    goals. In addition to the goals which will be measured by company  financial
    performance,  realistic, operational management goals may be established. As
    well as being realistic, the goals should be measurable wherever possible by
    quantifiable performance criteria. It is recognized that measurement of some
    goals will require  subjective  assessments  of  performance.  Goals must be
    consistent with the longer-term strategic plan.

    Amount of bonus  payment for  financial/budget  related goals can vary above
    and below target based upon results achieved.  For targets met, bonus amount
    will be 100% of bonus target.  When targets are exceeded or are not reached,
    bonus will be proportionately more or less than the target.



<PAGE>


                                     -3-
    Project goals which are not quantifiable  will be evaluated by the Nicor Gas
    CEO  based on  performance  and will  fall  into one of five  categories  of
    achievement:  unsatisfactory; less than expected, but acceptable given facts
    and circumstances;  expected; more than expected, but less than outstanding;
    and  outstanding  performance.  Accordingly,  performance at, below or above
    expected performance will result in awards relative to performance.

    The  Compensation   Committee  may  make  appropriate   upward  or  downward
    adjustments  if,  after  taking  into  consideration  all of the  facts  and
    circumstances of the performance  period, it determines that adjustments are
    warranted.

    Plan Schedule

    The 2000  Nicor Gas  Incentive  Compensation  Plan runs on a  calendar  year
    basis,  with the strategic  planning cycle and budgeting process the primary
    link to performance and bonus targets.  Responsibility  for determination of
    financial  results  will be with the  Accounting  Department.  A program for
    review will be established and project or company goal  performance  will be
    reviewed at least twice each performance year.

    Year-end  results  should be  available  and  evaluated  in  January  of the
    following year.  Following approval of the Compensation  Committee and Board
    at the January meeting, bonuses will be payable to participants.

    Form of Payment

    All awards  will be paid in cash,  except  that a  participant  in the Stock
    Deferral  Plan may elect to defer up to 50% of their  award  into that plan.
    Deferral elections must meet the guidelines and timing of the Stock Deferral
    Plan to be effective.  Appropriate taxes for the entire award amount will be
    withheld from the portion of the award being paid in cash.

E.  Integration with Existing Programs

    Base  salaries  will be managed  with  range  standards  at the  appropriate
    industry  quartile  for  comparable   positions,   with  total  compensation
    objectives to be managed at a level  appropriate with the performance of the
    company  within  industry,  as  determined  by the  Compensation  Committee.
    Salaries will be monitored  each year and  increases  granted based on merit
    and  range  standard.  Bonus  targets  will be set as a  percentage  of base
    salary. A change,  other than the annual salary review,  in the compensation
    objective will


<PAGE>


                                     -4-


    customarily  occur during the year only through promotion to various levels,
    at which time the base salary and bonus target are also likely to change.

    Promotion of an employee during the year or reassignment to responsibilities
    in which new  performance  objectives  apply will result in proration of the
    existing  performance  objectives  and bonus  target and  assignment  of new
    performance  objectives  and  if  appropriate,  a new  bonus  target  as the
    Compensation Committee shall determine.

    Promotion into an Executive Salary Grade would create  eligibility for bonus
    at an amount  prorated on a monthly  basis  (i.e.,  eligible  for the plan 9
    months - 9/12 of an annual bonus).

    If a participant  voluntarily terminates or is terminated for cause prior to
    the end of the performance  period, then the participant will be entitled to
    no award. In the event a participant  shall die, become disabled,  or retire
    before the end of the performance  period, an award is payable prorated on a
    monthly basis or the  Compensation  Committee  may  authorize  payment of an
    award to the  participant,  or  beneficiary,  in such  other  amount  as the
    Committee deems appropriate.

F.  Responsibility

    Acceptance  and  success of this Plan will depend on  documented,  realistic
    goals that are fair, understandable and measurable.  Considerable management
    focus  and  involvement  will  be  required  for  goals  to be  established,
    communicated and monitored.

    The Human Resources Department will be responsible for the administration of
    the system for the company. This will include:

    1)  monitoring industry salary and total compensation levels,

    2)  recommending   structural   changes  in  base  salary  and  compensation
        objective adjustments, and,

    3)  assisting the Nicor Gas CEO in progress and  exception  reporting to the
        Compensation Committee.


<PAGE>


                                     -5-


    The Nicor Gas CEO shall be responsible for:

    1)  reviewing industry salary and compensation levels and approving
        recommendations before presentation to the Compensation Committee,

    2)  approving structural changes in base salary and compensation
        objective adjustments before presentation to the Compensation
        Committee,

    3)  recommending   eligibility,   performance   targets  and  goals  to  the
        Compensation Committee,


<PAGE>




    4)  monitoring  performance  targets  through the Accounting  Department and
        other sources of necessary documentation,

    5)  communicating progress reports to the participants, and,

    6)  reporting  performance  results and making award  recommendations to the
        Compensation Committee.

    The company's 2000 Nicor Gas Incentive  Compensation Plan and changes to its
    performance  targets and measurement  criteria will be reviewed and approved
    by the Compensation Committee.

    In  establishing  the  actual  bonus  awards  to be made,  the  Compensation
    Committee  may take into  account all of the facts and  circumstances  which
    exist during the year and may make appropriate  upward or downward revisions
    in performance  criteria,  add or delete objectives,  or change the relative
    percentages assigned to the various performance objectives.

G.  Amendment and Termination

    The Board of Directors  may amend or terminate  the Plan at any time without
    the consent of the  participants.  No such  amendment or  termination  shall
    negatively  impact any  participant's  amount which  accrued  under the Plan
    prior to the calendar year in which the amendment is made.

                                                        NICOR Human Resources
                                                        February 2000





                                                                 Nicor Inc.
                                                                 Form 10-K
                                                                 Exhibit 10.23

                     2000 LONG-TERM INCENTIVE PROGRAM

At the March 2000 meeting of the Compensation Committee,  the Committee approved
the 2000 Long-Term Incentive Program,  participants and awards. Shown below is a
full description of the Long-Term Program for 2000.

Summary of 2000 Long-Term Incentive Program

- -  Combination of Stock Options (SOs) and Dividend Performance Units (DPUs).
   - Annual grants of both, generally on a one-for-one basis.
   - Nothing  prevents the Committee from granting either  freestanding  stock
     options or dividend performance units.

- -  SOs have a ten-year term and would vest after three years.

- -  DPUs would accumulate dividend equivalents over at least a three-year period,
   and would pay out based on total shareholder return over the period.

- -  SOs and DPUs would be freestanding.

- -  The company will also continue to make selected use of restricted stock.

Description of Stock Options

- -  Option exercise price set at fair market value on date of grant.

- -  Options vest after three years (100% in year three).

- -  Options expire ten years from date of grant.

- -  Options can be NQSOs or ISOs; Nicor plans to grant NQSOs in 2000.

Description of Dividend Performance Units

- -  Each dividend  performance  unit accumulates all of the dividends paid on one
   share of Nicor stock during the three-year period. As an example,  if Nicor's
   annual dividend grows at $0.08 per year from its current level of $1.56, each
   unit would be worth $5.10 at the end of three years:

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

THIS DOCUMENT CONSTITUTES PART OF A PROSPECTUS COVERING SECURITIES THAT HAVE
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933.
- -------------------------------------------------------------------------------



<PAGE>


                                      -2-


                           Annual Dividend                Cumulative
        Year                   As of May             Dividend Unit Value
        ----               ----------------          -------------------
        1999                   $1.56                        --
        2000                   $1.64                        $1.62
        2001                   $1.72                        $3.32
        2002                   $1.80                        $5.10

- -  Accrued dividend  equivalents are not reinvested in company stock, nor is any
   interest paid on accrued dividends.

- -  Dividend  performance  units  accumulate no additional value after the end of
   the three-year period.

- -  Dividend performance units will pay out in cash, except that a participant in
   the Stock  Deferral  Plan may elect to defer up to 50% of their  payout  into
   that plan.  Deferral  elections  must meet the  guidelines  and timing of the
   Stock Deferral Plan to be effective.

How Dividend Performance Unit Payouts are Determined

- -  All dividend performance units pay out at the end of at least three years.

- -  The payout is modified by a performance multiplier which ranges from 0 to
   1.5.

- -  The  multiplier  is based on Nicor total  shareholder  return  (TSR) over the
   performance period, as compared to the performance of a utility industry peer
   group (S&P utility group).

- -  The following schedule shows the proposed dividend performance unit
   multiplier schedule:

                           Dividend Performance Unit
                              Multiplier Schedule

              Nicor TSR Performance
              Percentile Relative              Dividend Performance Unit
              To S&P Utility Group                     Payout Multiple
           75th Percentile or Higher                  1.5     X
                60th Percentile                       1.0     X
                50th Percentile                       0.75    X
                40th Percentile                       0.5     X
                25th Percentile                       0.25    X
           Below 25th Percentile                      0       X


<PAGE>



                                      -3-



- -  If Nicor total shareholder return for the performance period is negative, the
   dividend performance unit payout multiple will be zero.

Transferability

With Compensation  Committee  approval,  stock options and dividend  performance
units may be  transferred,  for no  consideration,  to or for the benefit of the
participant=s  immediate family as defined in the plan. All terms and conditions
remain applicable after transfer.

Termination Provisions

In the case of death, disability or retirement:

- -  Non-vested options and dividend performance units held for more than one year
   (as of the date of death,  disability or retirement) will vest and/or pay out
   in full.

- -  The full number of dividend  performance units will pay out at the end of the
   performance  cycle,  based  on  the  normal  per-unit   performance/pay   out
   guidelines.

- -  Vested options will remain exercisable for ten years after the date of grant.

- -  The Compensation Committee can override these provisions at its discretion.

In the case of termination of employment for any other reason,  there will be no
accelerated  vesting of unvested options and dividend  performance units. Vested
options will remain  exercisable for three months after the date of termination.
The Compensation Committee can override these provisions at its discretion.


                                                      Nicor Human Resources
                                                             March 2000




                                                            Nicor Inc.
                                                            Form 10-K
                                                            Exhibit 10.24


Nicor Gas


                            SECURITY PAYMENT PLAN
          As Amended and Restated Effective as of December 31, 1998


A  Security  Payment  Plan is  authorized  for all  Nicor  Gas  employees,  (the
"Company"), each of whom meets the following eligibility conditions:

o  Is in salary grade  Executive 1 or higher,  and reaches age 30 and  completes
   five years of service, or completes ten years of service, and

o  Is employed by the Company at the time of death, or disability  which results
   in retirement from the employ of the Company, as the case may be, and

o Has been employed by the company continuously since December 31, 1998.

Subject to the foregoing the Security Payment Plan provides:

I.    Should an eligible employee become disabled and/or die, the Company
      will pay (A) to the disabled employee, or (B) to the spouse surviving
      an employee who dies before attaining age 55, until such time as the
      employee would have attained age 55, if living, or until the spouse's
      death, or (C) if there be no surviving spouse or should the spouse die
      before the employee would have attained age 55, if living, to the
      employee's children, if any are living on the date of payment, in equal
      shares, a total annual sum equal to retirement benefits based on
      "normal retirement date."  Any payments under this provision will be
      made only to the eligible employee, while living, and be subject to
      income offsets as provided for in Sections V and VI.  If the disabled
      employee dies before attaining age 65, death benefits will be paid to
      the appropriate survivor according to the terms herein described.

      "Disabled"  is  herein  defined  to cover an  eligible  employee  whom the
      Compensation Committee of the Company's Board of Directors deems unable to
      perform  satisfactorily  a  position's  essential  duties  due to  medical
      reasons extending beyond twelve months.

      "Final earnings" as used herein are equal to the employee's highest annual
      salary  rate from the  Company  during  the  60-month  period  immediately
      preceding death or disability retirement.

      "Normal  retirement  date" is  herein  defined  to be the first day of the
      month next following the employee's 65th birthday.

<PAGE>
Security Payment Plan
Page 2


      "Service"  is  herein  defined  to equal the  years of  service  which the
      employee  would  have  accrued  from the most  recent  date of hire if the
      employee had  continued in the employ of the employer  until the date that
      otherwise would have been the normal retirement date.

      Said benefits are to be calculated as follows:

         A. 1.25% of the first $27,300* of final earnings times years of service
            through 30; plus

         B. 1.80% of the final earnings in excess of $27,300* times years of
            service through 30; plus

         C. 1.25% of the final earnings for each year of service over 30 years.

            *This amount is indexed 5% per year; in 1998 it is $27,300.

      "Spouse"  as used  herein  shall be defined as a member of the  employee's
      household on the date of the  employee's  death,  who married the deceased
      employee in a religious or civil ceremony recognized under the laws of the
      state or country where the marriage was contracted at least one year prior
      to:

         A.    The date of the employee's death, or

         B.    The date of disability retirement,

      whichever shall occur first.

II.   After the date the deceased  eligible employee would have attained age 55,
      the  Company  will pay to the  spouse,  if living,  until death an amount,
      which,  when  added to the  annual  payments  from the  Company's  defined
      benefit Retirement and Supplemental Retirement Plans, will be equal to 50%
      of the benefits as hereinbefore calculated. Payments, if any, to children,
      will cease after the date the eligible  employee  would have  attained age
      55.

III.  Should an  eligible  employee  die after  attaining  age 55,  whether as a
      result of prior  disability  or not,  but  before  attaining  age 65,  the
      Company will pay to the spouse, until death, an annual amount, which, when
      added to the annual payments from the Company's defined benefit Retirement
      and Supplemental  Retirement Plans will be equal to 50% of the benefits as
      calculated under Section I, above.

IV.   Payments  under  this Plan  shall be made in equal  monthly  or  quarterly
      installments.


<PAGE>


Security Payment Plan
Page 3



V.    A. Payments made to the spouse or children of an eligible employee
         under the Illinois Workers' Compensation Act, or other similar awards
         (excluding Social Security Act benefits) which result from government
         programs  financed or paid for (in whole or in part) through employer
         contributions,  will reduce payments under the Plan dollar-for-dollar.

      B. Payment made to a disabled employee or eligible survivor under
         disability retirement benefits from the Company's defined benefit
         Retirement and Supplemental  Retirement  Plans,  Early  Retirement
         benefits from said Retirement Plan, the Company's Long-Term  Disability
         Plan, awards under the Illinois  Workers'  Compensation Act, or other
         similar awards which result from  government  programs  financed or
         paid for (in whole or in part) through employer  contributions,  will
         reduce payments under this Plan dollar-for-dollar.

VI.   Should a spouse be receiving payments from the Security Payment Plan prior
      to the date the deceased eligible employee would have attained age 55 and
      also be receiving  payments  from the Company's  defined  benefit
      Retirement  and Supplemental  Retirement Plans, then the benefits
      calculated under Section I, above, will be reduced by such payments from
      the said Retirement Plans.





                                                                 Nicor Inc.
                                                                 Form 10-K
                                                                 Exhibit 10.25


January 14, 2000



PERSONAL AND HIGHLY CONFIDENTIAL

Via In-Person Delivery

Mr. Thomas A. Nardi
Senior Vice President
   Market Development
NICOR GAS
1844 Ferry Road
Naperville, IL  60563-9600

Dear Tom:

As you know,  on December  28, 1999, I provided you with a letter that set forth
the terms and conditions  related to your separation from employment with Nicor,
Inc. and Nicor Gas (Nicor). Based on our subsequent discussions,  we have agreed
to revise and  supplement  several of those terms and  conditions.  Accordingly,
this letter (letter agreement) and its attachments entirely supercede my earlier
letter  to you  and  confirms  our  agreement  regarding  your  separation  from
employment with Nicor. Our agreement and the separation arrangements are set out
below and  contained  in the  attached  waiver and release  agreement  and trade
secrets-confidentiality agreement.

1. Separation From Employment

   You agree to resign your  employment  effective  January 19, 2000.  Until the
   effective date of your resignation,  Nicor shall continue to pay your current
   salary,  less applicable federal and state taxes and payroll  deductions,  in
   accordance with its regular payroll procedures.

   Nicor agrees to pay or make  available to you all salary and any benefits due
   to you as of your  resignation date according to Nicor's  established  plans,
   policies  and  procedures.  Upon  your  resignation,  your  qualification  or
   disqualification for pension, 401K, stock option and all other benefits under
   applicable  Nicor  policies and benefit plans shall be governed in accordance
   with the terms of those policies and plans,  except as set forth in Section 2
   below.  Upon your  resignation  you shall  neither  be  authorized  to act on
   Nicor's  behalf nor represent to third parties that you are authorized to act
   on Nicor's behalf.


<PAGE>


Mr. Thomas A. Nardi                                        Highly Confidential
January 14, 2000
Page 2

2. Separation-Related Payments & Benefits

   On the  condition  that (i) no later than  twenty-one  days after January 14,
   2000 you sign,  date and return a copy of this letter  agreement,  the waiver
   and   release   agreement   attached   as   Attachment   A  and   the   trade
   secrets-confidentiality agreement attached as Attachment B, and (ii) you have
   not revoked the  agreements  pursuant to Section 3 of  Attachment A, you will
   receive the following separation-related payments and benefits:

   a. Separation Pay

      Nicor  agrees to provide you with twelve  months of base salary  ($217,000
      less applicable federal and state taxes and payroll deductions) payable in
      accordance  with its regular  payroll  procedures  covering  the period of
      January 19, 2000 through January 19, 2001 or a lump sum payment. You agree
      that this separation pay is over and above that to which you otherwise are
      entitled and is in exchange for and contingent  upon your signing (and not
      revoking) this letter agreement and its two attachments.

   b. Medical, Dental and Life Insurance

      Nicor agrees to permit you to participate in the Nicor medical, dental and
      company provided life insurance plans in which you currently are enrolled,
      subject  to (i) the same  terms and  conditions  as if you were an regular
      full-time  employee and (ii) your payment of the  applicable  contribution
      for  such  coverage  pursuant  to the  same  cost  sharing  formula  as is
      available to Nicor's regular  full-time  employees,  until the earliest of
      (1) January 19, 2001,  after which you will have the opportunity to obtain
      other benefit continuation coverage in accordance with the requirements of
      COBRA;  or (2) the date you become  eligible to  participate  in any other
      benefit  plan  provided by another  employer.  You agree that the medical,
      dental and life  insurance  benefits  are over and above that to which you
      otherwise  are entitled and are in exchange for and  contingent  upon your
      signing (and not revoking) this letter agreement and its two attachments.

   c. Outplacement Services

      Nicor agrees to provide you with twelve  months of executive  outplacement
      services,  beginning  on January 19, 2000 and ending on January 19,  2001.
      Nicor exclusively shall determine the provider, nature, amount and cost of
      outplacement  services and shall pay the service provider directly for its
      services.  The outplacement  services are a benefit over and above that to
      which you  otherwise  are entitled and are in exchange for and  contingent
      upon your signing (and not  revoking)  this letter  agreement  and its two
      attachments.


<PAGE>


Mr. Thomas A. Nardi                                        Highly Confidential
January 14, 2000
Page 3

   d. Car Allowance

      Nicor  agrees to provide  you with 12 months of  automobile  allowance  --
      $7,200 -- payable in a lump sum  covering  the period of January  19, 2000
      through  January 19,  2001.  You agree that the car  allowance is over and
      above that to which you  otherwise are entitled and is in exchange for and
      contingent upon your signing (and not revoking) this letter  agreement and
      its two attachments.

   e. Long-Term Incentive Benefits

      Nicor  agrees  that for each vested  share of Nicor  common  stock  (Nicor
      stock) that you are eligible to purchase by exercising a stock option that
      was awarded to you under the Nicor, Inc. 1989 Long-Term Incentive Plan and
      the Nicor, Inc. 1997 Long-Term Incentive Plan (the Incentive Plans), Nicor
      will award you one Stock Appreciation Unit, as described below, and cancel
      all such stock options without  exercise.  You currently have  outstanding
      vested stock options to purchase  51,000 shares.  Each Stock  Appreciation
      Unit that Nicor issues you under this Section  shall give you the right to
      receive an amount equal to the excess, if any, of:

      (i)the Fair Market Value (as  determined  under the Incentive  Plans) of a
         share of Nicor stock (as  adjusted  in  accordance  with the  Incentive
         Plans' rules relating to reorganizations, recapitalizations and similar
         events)  determined  as of the  exercise  date  elected by you (or your
         estate) under this Section

                        over

      (ii) the  option  price of such a share of Nicor  stock  under the  option
         replaced by the Stock Appreciation Unit.

      Your right to  exercise  any Stock  Appreciation  Unit under this  Section
      shall  begin on  January  19,  2000 and end on  January  19,  2003 (if not
      exercised  before that date).  Any exercise date that you elect under this
      Section  must be in writing and  delivered  to Nicor's  Vice  President of
      Human Resources at Nicor's  principal  administrative  office on or before
      the elected  exercise date.  You agree that the benefit  described in this
      Section is over and above that to which you  otherwise are entitled and is
      in exchange for and  contingent  upon your signing (and not revoking) this
      letter agreement and its two attachments.


<PAGE>


Mr. Thomas A. Nardi                                        Highly Confidential
January 14, 2000
Page 4

3. Use And Return Of Nicor Property And Information

   You  have  returned  or  will  immediately   return  to  Nicor  all  "company
   information"  (as  defined  below)  and  related  documents,  reports,  files
   (including data stored in computer memory or other storage media),  memoranda
   and records;  credit  cards;  cell  phones;  portable  computers  and related
   equipment;  card-key  passes;  door and file  keys;  computer  access  codes;
   software  and all other  physical or  personal  property  that you  received,
   prepared or helped prepare in connection with your employment. You also agree
   that you have not  retained  and will  not  retain  any  copies,  duplicates,
   reproductions or excerpts of the above items. The term "company  information"
   means: (i) confidential  and/or proprietary  information  including,  without
   limitation,  information  received  from  third  parties  under  confidential
   conditions and/or (ii) other technical,  business, or financial  information,
   the use or disclosure of which may  reasonably be construed to be contrary to
   Nicor's  interest.  You  agree  to keep  all  such  confidential  information
   confidential  and not to disclose  such  information  to anyone except to the
   extent you are compelled to do so by legal process.

4. Confidentiality Of This Agreement And Its Two Attachments

   You and Nicor agree to keep the facts underlying your resignation this letter
   agreement's   existence  and  its  terms  and   conditions   (including   the
   attachments)  strictly  confidential  at all times and that disclosure to any
   person, organization, newspaper, company, or current or former Nicor employee
   is strictly  prohibited.  For you, the only  exceptions  to this  restriction
   shall be a disclosure made to your immediate family, attorneys, tax advisors,
   state and federal taxing authorities,  or as required by the express terms of
   a lawful  subpoena or court order.  For Nicor,  the only  exceptions  to this
   restriction shall be a disclosure made to its attorneys,  tax advisors, state
   and federal taxing authorities, Nicor employees in a "need-to-know" position,
   or as required by the express terms of a lawful subpoena or court order.

   Except as provided in Section 5 below,  if inquiries  arise  concerning  your
   resignation by anyone other than those listed,  you and Nicor will state that
   you have chosen "to seize the opportunity to pursue other  interests" or make
   a "career move" and will make no other comment.

   You further agree that you shall not take any actions or make any  statements
   that  disparage  or reflect  negatively  on Nicor,  its  officers,  director,
   employees,  operations  and/or  customers.  You further agree that, except as
   compelled  under  legal  process,  you will  never  aid in any  contemplated,
   threatened or actual litigation of any kind against Nicor. Additionally,  you
   and Nicor agree that, because the exact amount of potential damages to


<PAGE>


Mr. Thomas A. Nardi                                        Highly Confidential
January 14, 2000
Page 5

   Nicor  resulting  from  your  breach  of this  confidentiality  agreement  is
   difficult to  determine  with any  precision,  if a court finds that you have
   breached this confidentiality  agreement in any respect, you will pay Nicor's
   costs and attorneys' fees incurred in obtaining an injunction and/or judgment
   against you.

5. Employment Reference

   Nicor agrees that,  in response to a request for a reference  regarding  your
   employment,  it shall confirm your dates of employment,  your  position,  and
   provide a positive written reference.

6. General Matters

   You also agree that:

   *  you have not suffered any on-the-job injury for which you have not
      already filed a claim;

   *  you are  encouraged  to consult an  attorney  before  signing  this letter
      agreement and the  waiver/release  agreement and you acknowledge  that, by
      and including  February 4, 2000, Nicor will have given you twenty-one days
      within which to consider this letter agreement and its two attachments;

   *  you are  entering  into  this  letter  agreement  and its two  attachments
      knowingly and voluntarily and with full knowledge of their significance;

   *  you have not been coerced, threatened, or intimidated into signing
      this letter agreement and its two attachments;

   *  if any part of this letter  agreement and/or its two attachments are found
      to be illegal or invalid,  the rest of the letter agreement and/or its two
      attachments will be enforceable;

   *  this  letter  agreement  and its two  attachments  set  forth  the  entire
      agreement  between you and Nicor regarding your separation from employment
      and supersede  any written or oral  understanding,  promise,  or agreement
      that is not  referred to and  incorporated  herein.  No other  promises or
      agreements  shall be binding  unless made in writing and signed by you and
      me;

   *  this letter agreement and its two attachments shall be governed by
      Illinois law and may be changed only by a writing signed by you and
      me; and


<PAGE>


Mr. Thomas A. Nardi                                        Highly Confidential
January 14, 2000
Page 6

   *  this  letter  agreement  and its two  attachments  have been  individually
      negotiated  between  you  and  Nicor  and are  not  part  of a group  exit
      incentive or other group employment termination program.

Please do not hesitate to contact me if you would like further  clarification of
any aspect of these arrangements or their implementation.

Please indicate your agreement to and acceptance of these  provisions by signing
and dating the enclosed copy of this letter  agreement  and its two  attachments
and returning  them to me by February 4, 2000. So there is no  misunderstanding,
if for any reason I do not received the signed copy of this letter agreement and
its attachments from you by February 4, 2000, the separation  benefits described
in this letter agreement will be deemed to be withdrawn and the letter agreement
shall be entirely ineffective.

I wish you the best of luck in your future endeavors.

                                    Sincerely yours,

                                    NICOR GAS

                                    By    CLAUDIA J. COLALILLO
                                          Claudia J. Colalillo
                                          Vice President Human Resources

AGREED AND ACCEPTED:

THOMAS A. NARDI
Thomas A. Nardi

Date January 19,2000


<PAGE>



                                    Attachment A

                        WAIVER AND RELEASE AGREEMENT

In exchange for the promises  made in Claudia  Colalillo's  letter dated January
14, 2000, Thomas A. Nardi, on behalf of himself, his spouse,  heirs,  executors,
administrators  and agents (You), and Nicor Gas, on behalf of itself, its parent
company  (and  all  of its  subsidiaries),  predecessors,  successors,  assigns,
trustees, officers, directors,  fiduciaries, agents and employees (collectively,
Nicor), enter into this waiver/release agreement (Waiver/Release  Agreement) and
agree as follows:

1. General Waiver And Release Of All Claims

   You  agree  not  to  sue  Nicor  in  any  federal,   state  or  local  court,
   administrative  agency or tribunal,  and you waive and release all claims and
   causes of action  you may  have,  as of the day you sign this  Waiver/Release
   Agreement,  against Nicor arising from your employment with Nicor. The claims
   and causes of action  you are  releasing  and  waiving  include,  but are not
   limited to, any and all claims and causes of action that Nicor:

   *  has violated its personnel policies, any covenant of good faith and
      fair dealing or any employment contract between you and it;

   *  has discriminated  against you on the basis of your age, race, color, sex,
      national origin, ancestry, disability,  religion, marital status, parental
      status, source of income, union activities, or entitlement to benefits, in
      violation of local,  state or federal  laws,  constitutions,  regulations,
      ordinances or executive orders; and/or

   *  has violated  public  policy or common law  (including  but not limited to
      claims for: personal injury;  invasion of privacy;  retaliatory discharge;
      negligent  hiring,  retention or supervision;  defamation;  intentional or
      negligent   infliction  of  emotional   distress  and/or  mental  anguish;
      intentional interference with contract; negligence;  detrimental reliance;
      loss of consortium to you or any member of your family;  and/or promissory
      estoppel).

   Excluded  from this waiver and release is any claim or right which  cannot be
   waived by law, including claims arising after the date of this Waiver/Release
   Agreement  and  the  right  to  file  a  charge  with  or  participate  in an
   investigation conducted by the Equal Employment Opportunity  Commission.  You
   are waiving,  however, your right to any monetary recovery if the EEOC or any
   other agency pursues any claim on your behalf.

2. Covenant Not To Sue

   You agree never to institute any suit,  complaint,  proceeding,  grievance or
   action of any kind at law, in equity,  or  otherwise  in any state or federal
   court, or in any federal, state, county, or municipal  administrative agency,
   or before any other public or private tribunal,


<PAGE>


   against  Nicor  arising  from your  employment  with  Nicor  and/or any other
   occurrence to the date you sign this Waiver/Release Agreement. You also waive
   any right to recover any relief as a result of any  proceeding  instituted on
   your behalf.  If you violate this Agreement by suing Nicor,  other than under
   the Age  Discrimination  in  Employment  Act of 1967 (ADEA)  challenging  the
   validity  of the waiver and release  agreement  set forth in Section 3 below,
   then you shall be liable for  Nicor's  attorneys'  fees and other  litigation
   costs incurred in defending against such a suit.

3. Waiver And Release Of Age Discrimination Claims

   You agree to waive and  release  Nicor from all claims or rights you may have
   as of the date you sign this Waiver/Release Agreement arising under the ADEA.
   You further agree that:

   *  your waiver of rights under this release is knowing and voluntary
      and in compliance with the Older Workers Benefit Protection Act of
      1990, 29 U.S.C. Section 626(f);

   *  you understand the terms of this release;

   *  the money and  benefits  promised  in  Section  2 of  Claudia  Colalillo's
      January 14, 2000 letter are over and above that to which you otherwise are
      entitled  upon the  resignation  of your  employment,  that the  money and
      benefits would not have been provided had you not signed this release, and
      that the  money  and  benefits  is in  exchange  for the  signing  of this
      release;

   *  Nicor is hereby advising you in writing to consult with an attorney
      prior to executing this release;

   *  Nicor is giving you a period of  twenty-one  days (from  January 14, 2000)
      within which to consider this release;

   *  after you sign this  release you have seven days to revoke it. If you want
      to revoke it, you must do so in writing and deliver the writing to Claudia
      Colalillo (or her  assistant),  Vice President of Human  Resources,  Nicor
      Gas, 1844 Ferry Road, Naperville,  Illinois 60563-9600, no later than 4:00
      p.m. on the seventh day after you sign this release; and

   *  if you revoke it, this  entire  Waiver/Release  Agreement,  all of Claudia
      Colalillo's January 14, 2000 letter and the trade  secrets-confidentiality
      agreement are of no force or effect, but if you do not revoke it, you will
      receive the consideration described in Section 2 of her letter.



<PAGE>


   By signing this release,  you are not waiving rights or claims that may arise
   under the ADEA after the date you sign this release.

4. Various Matters

   You further agree that:

   *  the money and  benefits  promised  in  Section  2 of  Claudia  Colalillo's
      January 14, 2000 letter are over and above that to which you otherwise are
      entitled upon the resignation of your employment;

   *  you are entering into this Waiver/Release Agreement knowingly and
      voluntarily and with full knowledge of its significance;

   *  you have not been coerced, threatened, or intimidated into signing
      this Waiver/Release Agreement;

   *  you  have  been  given  a  reasonable  amount  of time  to  consider  this
      Waiver/Release  Agreement and Nicor is hereby advising you to consult with
      an attorney before signing this Agreement;

   *  if any part of this Agreement is found to be illegal or invalid, the
      rest of the Waiver/Release Agreement will be enforceable; and

   *  this Waiver/Release Agreement shall be governed by Illinois law and may be
      changed  only by a writing  signed by you and  Claudia  Colalillo  (or her
      designee).



THOMAS A. NARDI                           CLAUDIA J. COLALILLO
Thomas A. Nardi                           Claudia J. Colalillo
                                          Vice President of Human Resources
Dated January 19,2000
                                          Dated January 19, 2000


<PAGE>



                                                                 Attachment B

January 17, 2000

Personal And Highly Confidential

Via In-Person Delivery

Mr. Thomas A. Nardi
Senior Vice President
   Market Development
NICOR GAS
1844 Ferry Road
Naperville, IL  60563-9600

Dear Tom:

As you know, on January 14, 2000, I provided you with a revised  letter  (letter
agreement) and two attachments  that set forth the terms and conditions  related
to your separation from employment with Nicor, Inc. and Nicor Gas (Nicor). Based
on our subsequent  discussions,  we have agreed to revise the second  attachment
(the trade secrets-confidential  information agreement) to the letter agreement.
In particular, we agreed to clarify the distinction between information that, on
one  hand,  constitutes  covered  trade  secrets-confidential   information  and
information  that,  on the other hand,  constitutes  information  that is in the
public  domain  and  not  covered  by the  agreement.  Accordingly,  this  trade
secrets-confidentiality  agreement  entirely  supercedes  the  January  14, 2000
version of the agreement.

                                  Background

I.   You and Nicor agree that,  during your  employment,  you have been afforded
     special access to Trade Secrets-Confidential Information (as defined below)
     that   constitute  a  valuable  and  unique  asset  to  Nicor,   Inc.,  its
     subsidiaries and affiliates (collectively, Nicor). You and Nicor agree that
     the  energy  industry  is  highly  competitive,  that  Nicor  has  invested
     significant  time and  resources in developing  Trade  Secrets-Confidential
     Information, and that Nicor would suffer a significant economic loss if its
     Trade   Secrets-Confidential   Information   were   disclosed   to  Nicor's
     competitors and/or the general public.

II.  You and Nicor agree that, by virtue of your position with Nicor, after your
     separation  from  employment  you will  have the  opportunity  to use Trade
     Secrets-Confidential  Information  that Nicor  developed at its expense and
     that Nicor has a  sufficient  basis to protect  its  interest  in its Trade
     Secrets-Confidential Information.


<PAGE>


Mr. Thomas A. Nardi                                       Highly Confidential
January 17, 2000
Page 2

III. You and Nicor  agree  that  Nicor has  invested  substantial  resources  to
     develop   relationships  with  its  existing  and  potential  partners  and
     customers and that those  relationships have been to the benefit of you and
     Nicor.

IV.  You and Nicor  agree that Nicor does  business  throughout  the  Midwestern
     United States and that Nicor has national interests in protecting its Trade
     Secrets-Confidential  Information and safeguarding its customer and partner
     relationships.

V.   You and Nicor agree that, upon your separation  from  employment,  you will
     continue to comply with the attached  Nicor Policy Order A-1  (conflicts of
     interest), Policy Order A-2 (improper use of company cash or other assets),
     Policy Order A-46  (disclosure of confidential  information),  and Standard
     Practice General 9 (release of information  concerning company activities),
     and Code of Ethics (as  acknowledged on October 19, 1999),  and not violate
     the Illinois Trade Secrets Act, 765 ILCS 1065/1 et seq., to the extent that
     the Policy Orders,  Code of Ethics and/or the Act apply to your  possession
     and use of Trade Secrets-Confidential Information.

VI.  You and Nicor agree that the January 14, 2000 letter agreement  promises to
     provide  you with  money  and  benefits  over and  above  that to which you
     otherwise  are entitled and that the money and benefits are in exchange for
     your signing (and not revoking) the letter  agreement,  the  waiver/release
     agreement and this trade secrets-confidentiality agreement.

     In light of the foregoing  and in  consideration  of the mutual  promises
     set forth in the letter agreement, you and Nicor agree as follows:

     1. Trade Secrets-Confidential Information

      "Trade   Secrets-Confidential   Information"  means,  without  limitation:
      customer lists of Nicor Inc. and all of its affiliates,  including but not
      limited to Nicor Gas, Nicor Energy, L.L.C., Nicor Enerchange,  L.L.C., and
      Birdsall, Inc. (and its affiliates);  pricing of products and/or services;
      performance-based strategies; trading activities;  proprietary,  technical
      and/or business  information related to Nicor's business plans;  analyses,
      techniques  or  strategies  concerning  actual or  potential  acquisitions
      and/or new ventures;  development  and/or  introduction plans for products
      and/or services;  unannounced  products and/or services;  operation costs;
      research and  development  processes;  data relating to research,  design,
      implementation  and/or  marketing  of Nicor's  products  and/or  services;
      non-public  information  concerning the requirements and specifications of
      Nicor's  agents,  vendors,  suppliers,  trading  partners,   transporters,
      contractors and/or potential customers;  non-public financial information;
      business and  marketing  plans;  quotations  or proposals  given to agents
      and/or customers and/or


<PAGE>


Mr. Thomas A. Nardi                                       Highly Confidential
January 17, 2000
Page 3

      received from suppliers;  methods for developing and maintaining  business
      relationships  with past,  present or potential partners and/or customers;
      procedure  manuals;  employee  training and review  manuals;  confidential
      personnel data; and all other  information that is sufficiently  secret to
      create economic value from not being generally known.

      You  and   Nicor   agree   that  the   foregoing   definition   of  "trade
      secrets-confidential information" does not include information and/or data
      that is  legitimately  in the public domain,  i.e.,  generally known to or
      accessible by the public through legitimate origins and means.

      You   acknowledge   that  this  Trade   Secrets-Confidential   Information
      constitutes  a valuable and unique asset of Nicor that has been  developed
      over  considerable  time and at a substantial  expense to Nicor. Upon your
      separation    from    employment,    you   agree   to   hold   all   Trade
      Secrets-Confidential  Information  in trust for the sole  benefit of Nicor
      and that you shall  not,  without  Nicor's  prior  written  consent,  make
      available  or  disclose  in  any  way  (directly  or   indirectly)   Trade
      Secrets-Confidential  Information  to any  person  (including  current  or
      former  Nicor  employees),  organization,  newspaper,  firm,  partnership,
      association,    corporation    or    business    entity   or   use   Trade
      Secrets-Confidential  Information  to  your  benefit  or  the  benefit  of
      another.

      2. Miscellaneous Provisions

      You and Nicor  agree that  Nicor may  enforce  any breach or  anticipatory
      breach of this agreement by seeking an  injunction,  money damages and all
      other relief available under the law. You and Nicor further agree that, in
      the event that a court of competent jurisdiction determines that the exact
      amount of damages to Nicor resulting from your breach of Sections 1 and/or
      2 is difficult to determine  with any reasonable  precision,  you will pay
      Nicor's  costs and  attorneys'  fees  incurred in obtaining an  injunction
      and/or judgment against you.

      You and Nicor  agree that Nicor and all of its related  entities  are this
      agreement's  intended  beneficiaries and that Nicor and all of its related
      entities  are  entitled  to  enforce  this   agreement  as  if  they  were
      signatories to it.

      You and Nicor agree that this agreement  shall be governed by Illinois law
      and that if a court of competent jurisdiction  determines that any part of
      this  agreement  is illegal or invalid  (e.g.,  overbroad  with  regard to
      duration,  activity or subject matter),  the rest of the agreement will be
      enforceable to the full extent of applicable law.

      You and  Nicor  agree  that  this  agreement,  the  letter  agreement  and
      waiver/release  agreement set forth the entire  agreement  between you and
      Nicor regarding your


<PAGE>


Mr. Thomas A. Nardi                                       Highly Confidential
January 17, 2000
Page 4

      separation   from   employment   and   supersede   any   written  or  oral
      understanding,   promise,  or  agreement  that  is  not  referred  to  and
      incorporated  herein.  You and  Nicor  agree  that no  other  promises  or
      agreements  shall be binding  unless made in writing and signed by you and
      me (or my  designee).  You and Nicor also agree that you (i) are  entering
      into this agreement  knowingly and  voluntarily and with full knowledge of
      its significance;  (ii) have not been coerced,  threatened, or intimidated
      into  signing this  agreement;  and (iii) you have been given a reasonable
      amount of time to consider this agreement.

So there is no  misunderstanding,  if for any reason I do not receive the signed
copy of this  agreement  (as well as the  letter  agreement  and  waiver/release
agreement)  from you by February 4, 2000, the separation  benefits  described in
Section 2 of the letter  agreement will be deemed to be withdrawn and the letter
agreement shall be entirely ineffective.

                                    Sincerely yours,

                                    NICOR GAS

                                    By     CLAUDIA J. COLALILLO
                                           Claudia J. Colalillo
                                           Vice President Human Resources


AGREED AND ACCEPTED:

THOMAS A. NARDI
Thomas A. Nardi

Date January 19, 2000





                                                                Nicor Inc.
                                                                Form 10-K
                                                                Exhibit 10.26



               Resolutions for Board of Directors of Nicor Inc.
                        as Adopted on December 7, 1999



      RESOLVED,  that the Nicor  Inc.  Stock  Deferral  Plan is hereby  amended,
effective  as of the  date of  adoption  of this  resolution,  to  provide  that
distributions of each  Participant's  Deferred Stock Account  thereunder will be
distributed as soon as practicable  after the occurrence of a Change in Control;
provided,  however,  that to the extent required by the terms of such plan, such
amendment  shall not be effective with respect to any employee  unless and until
the employee has consented to such acceleration.

      RESOLVED,  that the  definition  of "Change in  Control"  in all  Employee
Benefit  Arrangements  (as defined below) shall be modified by substituting  for
such  definition  in  each  such  Employee  Benefit  Arrangement  the  following
definition of "Change in Control":

            "Change in Control" means:



<PAGE>





            1. The  acquisition by any  individual,  entity or group (within the
      meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of
      1934,  as  amended  (the  "Exchange  Act"))  (a  "Person")  of  beneficial
      ownership (within the meaning of Rule 13d-3 promulgated under the Exchange
      Act) of any shares of Common Stock of the Company or any voting securities
      of the Company entitled to vote generally in the election of directors if,
      as a result of such  acquisition,  such  person owns 20% or more of either
      (i)  the   outstanding   shares  of  common  stock  of  the  Company  (the
      "Outstanding  Company Common Stock"), or (ii) the combined voting power of
      the  outstanding  voting  securities  of  the  Company  entitled  to  vote
      generally in the election of directors  (the  "Outstanding  Company Voting
      Securities");  provided,  however, that for purposes of this subsection 1,
      the following  acquisitions shall not constitute a Change in Control:  (A)
      any acquisition by the Company, (B) any acquisition by an employee benefit
      plan (or related  trust)  sponsored  or  maintained  by the Company or any
      corporation  controlled  by the  Company (a  "Company  Plan"),  or (C) any
      acquisition by any  corporation  pursuant to a transaction  which complies
      with subsections 3.1, 3.2 and 3.3 of this  definition;  provided  further,
      that for purposes of clause (A), if any Person  (other than the Company or
      any Company Plan) shall become the beneficial  owner of 20% or more of the
      Outstanding Company Common Stock or 20% or more of the Outstanding Company
      Voting  Securities by reason of an  acquisition  by the Company,  and such
      Person shall, after such acquisition by the Company, become the beneficial
      owner of any additional shares of the Outstanding  Company Common Stock or
      any additional  Outstanding Company Voting Securities (other than pursuant
      to  any  dividend  reinvestment  plan  or  arrangement  maintained  by the
      Company)  and  such  beneficial  ownership  is  publicly  announced,  such
      additional beneficial ownership shall constitute a Change in Control; or

            2. Individuals  who, as of the date hereof,  constitute the Board of
      Directors of the Company (for purposes of this definition,  the "Incumbent
      Board")  cease for any reason to  constitute  at least a  majority  of the
      Incumbent  Board;  provided,  however,  that  any  individual  becoming  a
      director  subsequent to the date hereof whose election,  or nomination for
      election by the Company shareholders, was approved by a vote of at least a
      majority of the directors  then  comprising  the Incumbent  Board shall be
      considered as though such individual were a member of the Incumbent Board,
      but  excluding,  for this  purpose,  any  such  individual  whose  initial
      assumption  of  office  occurs  as a  result  of  an  actual  or  publicly
      threatened  election  contest  (as  such  terms  are  used in Rule  14a-11
      promulgated under the Exchange Act) or other actual or publicly threatened
      solicitation of proxies or consents by or on behalf of a Person other than
      the Board of Directors of the Company; or

            3.  Consummation,  including  receipt  of any  necessary  regulatory
      approval,  of  (i)  a  reorganization,  merger,  consolidation,  or  other
      business  combination  involving  the  Company  or (ii)  the sale or other
      disposition  of more  than  50% of the  operating  assets  of the  Company
      (determined  on a  consolidated  basis),  other than in connection  with a
      sale-leaseback or other arrangement resulting in the continued utilization
      of such assets (or the  operating  products of such assets) by the Company
      (any  transaction  described  in part (i) or (ii) being  referred  to as a
      "Corporate  Transaction");  excluding,  however,  a Corporate  Transaction
      pursuant to which:



<PAGE>


                  3.1. all or substantially  all of the individuals and entities
            who are the  beneficial  owners,  respectively,  of the  Outstanding
            Company  Common  Stock and  Outstanding  Company  Voting  Securities
            immediately  prior to such Corporate  Transaction  beneficially own,
            directly or  indirectly,  more than 60% of,  respectively,  the then
            outstanding  shares of common stock and the combined voting power of
            the then outstanding voting securities entitled to vote generally in
            the  election  of  directors,  as the case may be,  of the  ultimate
            parent entity resulting from such Corporate Transaction  (including,
            without   limitation,   an  entity  which,   as  a  result  of  such
            transaction,  owns the  Company or all or  substantially  all of the
            assets  of the  Company  either  directly  or  through  one or  more
            subsidiaries)  in  substantially   the  same  proportions  as  their
            ownership,  immediately  prior to such Corporate  Transaction of the
            Outstanding  Company  Common Stock and  Outstanding  Company  Voting
            Securities, as the case may be;

                  3.2. no Person  (other than the  Company,  any Company Plan or
            related  trust,  the  corporation   resulting  from  such  Corporate
            Transaction,  and any Person which beneficially  owned,  immediately
            prior to such Corporate Transaction,  directly or indirectly, 20% or
            more of the  Outstanding  Company  Common  Stock or the  Outstanding
            Company  Voting  Securities,  as the case may be) will  beneficially
            own, directly or indirectly, 20% or more of, respectively,  the then
            outstanding  common stock of the ultimate  parent  entity  resulting
            from such Corporate  Transaction or the combined voting power of the
            then outstanding voting securities of such entity; and

                  3.3.  individuals who were members of the Incumbent Board will
            constitute  at  least a  majority  of the  members  of the  board of
            directors  of  the  ultimate  parent  entity   resulting  from  such
            Corporate Transaction; or

            4. A tender  offer  (for  which a  filing  has  been  made  with the
      Securities  and Exchange  Commission  (the "SEC") which purports to comply
      with  the  requirements  of  Section  14(d)  of the  Exchange  Act and the
      corresponding  SEC rules) is made for the stock of the Company,  which has
      not been negotiated and approved by the Board,  provided that in case of a
      tender offer described in this subsection 4, the Change in Control will be
      deemed to have occurred at the first time during the offer period when the
      Person (as defined in  subsection 1 above)  making the offer  beneficially
      owns or has accepted for payment  stock of the Company with 20% or more of
      the  combined  voting  power  of  the  then  Outstanding   Company  Voting
      Securities; or

            5. Approval by the shareholders of the Company of a plan of complete
      liquidation or dissolution of the Company.



<PAGE>


            6. For  purposes of this  definition  of Change in Control,  (i) the
      term  "Company"  shall mean Nicor Inc. and shall  include any Successor to
      Nicor  Inc.;  and (ii) the term  "Successor  to Nicor Inc." shall mean any
      corporation,  partnership,  joint venture or other entity that succeeds to
      the interests of Nicor Inc. by means of a merger,  consolidation  or other
      restructuring   that  does  not  constitute  a  Change  in  Control  under
      subsections 1, 3 or 4 above.

However, to the extent required by the applicable Employee Benefit  Arrangement,
such substitution shall not be effective with respect to any employee unless and
until the employee has consented to such substitution.
For purposes of this resolution:

- -     The term "Employee Benefit  Arrangement" shall mean each agreement with an
      employee  to which  Nicor Inc.  is a party,  and each plan or  arrangement
      maintained by Nicor Inc., and including any awards  outstanding  under any
      such  agreement,  plan,  or  arrangement,  to the extent  that such award,
      agreement,  plan,  or  arrangement  contains  a  definition  of "Change in
      Control."

- -     To the extent that the Employee Benefit Arrangement provides for an
      award based on common stock of the Company (including, without
      limitation, an award of stock option award or shares of restricted
      stock), and such Employee Benefit Arrangement provides that vesting or
      exercisability of such award will occur at the time of the Change in
      Control (rather than the occurrence of a subsequent event, such as
      termination of employment), the following shall be substituted for the
      definition of "Change in Control":

            "Change in Control" means:



<PAGE>


            1. The  acquisition by any  individual,  entity or group (within the
      meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of
      1934,  as  amended  (the  "Exchange  Act"))  (a  "Person")  of  beneficial
      ownership (within the meaning of Rule 13d-3 promulgated under the Exchange
      Act) of any shares of Common Stock of the Company or any voting securities
      of the Company entitled to vote generally in the election of directors if,
      as a result of such  acquisition,  such  person owns 20% or more of either
      (i)  the   outstanding   shares  of  common  stock  of  the  Company  (the
      "Outstanding  Company Common Stock"), or (ii) the combined voting power of
      the  outstanding  voting  securities  of  the  Company  entitled  to  vote
      generally in the election of directors  (the  "Outstanding  Company Voting
      Securities");  provided,  however, that for purposes of this subsection 1,
      the following  acquisitions shall not constitute a Change in Control:  (A)
      any acquisition by the Company, (B) any acquisition by an employee benefit
      plan (or related  trust)  sponsored  or  maintained  by the Company or any
      corporation  controlled  by the  Company (a  "Company  Plan"),  or (C) any
      acquisition by any  corporation  pursuant to a transaction  which complies
      with subsections 3.1, 3.2 and 3.3 of this  definition;  provided  further,
      that for purposes of clause (A), if any Person  (other than the Company or
      any Company Plan) shall become the beneficial  owner of 20% or more of the
      Outstanding Company Common Stock or 20% or more of the Outstanding Company
      Voting  Securities by reason of an  acquisition  by the Company,  and such
      Person shall, after such acquisition by the Company, become the beneficial
      owner of any additional shares of the Outstanding  Company Common Stock or
      any additional  Outstanding Company Voting Securities (other than pursuant
      to  any  dividend  reinvestment  plan  or  arrangement  maintained  by the
      Company)  and  such  beneficial  ownership  is  publicly  announced,  such
      additional beneficial ownership shall constitute a Change in Control; or

            2. Individuals  who, as of the date hereof,  constitute the Board of
      Directors of the Company (for purposes of this definition,  the "Incumbent
      Board")  cease for any reason to  constitute  at least a  majority  of the
      Incumbent  Board;  provided,  however,  that  any  individual  becoming  a
      director  subsequent to the date hereof whose election,  or nomination for
      election by the Company shareholders, was approved by a vote of at least a
      majority of the directors  then  comprising  the Incumbent  Board shall be
      considered as though such individual were a member of the Incumbent Board,
      but  excluding,  for this  purpose,  any  such  individual  whose  initial
      assumption  of  office  occurs  as a  result  of  an  actual  or  publicly
      threatened  election  contest  (as  such  terms  are  used in Rule  14a-11
      promulgated under the Exchange Act) or other actual or publicly threatened
      solicitation of proxies or consents by or on behalf of a Person other than
      the Board of Directors of the Company; or

            3.  Consummation,  including  receipt  of any  necessary  regulatory
      approval,  of  (i)  a  reorganization,  merger,  consolidation,  or  other
      business  combination  involving  the  Company  or (ii)  the sale or other
      disposition  of more  than  50% of the  operating  assets  of the  Company
      (determined  on a  consolidated  basis),  other than in connection  with a
      sale-leaseback or other arrangement resulting in the continued utilization
      of such assets (or the  operating  products of such assets) by the Company
      (any  transaction  described  in part (i) or (ii) being  referred  to as a
      "Corporate  Transaction");  excluding,  however,  a Corporate  Transaction
      pursuant to which:

                  3.1. all or substantially  all of the individuals and entities
            who are the  beneficial  owners,  respectively,  of the  Outstanding
            Company  Common  Stock and  Outstanding  Company  Voting  Securities
            immediately  prior to such Corporate  Transaction  beneficially own,
            directly or  indirectly,  more than 60% of,  respectively,  the then
            outstanding  shares of common stock and the combined voting power of
            the then outstanding voting securities entitled to vote generally in
            the  election  of  directors,  as the case may be,  of the  ultimate
            parent entity resulting from such Corporate Transaction  (including,
            without   limitation,   an  entity  which,   as  a  result  of  such
            transaction,  owns the  Company or all or  substantially  all of the
            assets  of the  Company  either  directly  or  through  one or  more
            subsidiaries)  in  substantially   the  same  proportions  as  their
            ownership,  immediately  prior to such Corporate  Transaction of the
            Outstanding  Company  Common Stock and  Outstanding  Company  Voting
            Securities, as the case may be;



<PAGE>


                  3.2. no Person  (other than the  Company,  any Company Plan or
            related  trust,  the  corporation   resulting  from  such  Corporate
            Transaction,  and any Person which beneficially  owned,  immediately
            prior to such Corporate Transaction,  directly or indirectly, 20% or
            more of the  Outstanding  Company  Common  Stock or the  Outstanding
            Company  Voting  Securities,  as the case may be) will  beneficially
            own, directly or indirectly, 20% or more of, respectively,  the then
            outstanding  common stock of the ultimate  parent  entity  resulting
            from such Corporate  Transaction or the combined voting power of the
            then outstanding voting securities of such entity; and

                  3.3.  individuals who were members of the Incumbent Board will
            constitute  at  least a  majority  of the  members  of the  board of
            directors  of  the  ultimate  parent  entity   resulting  from  such
            Corporate Transaction; or

            4. A tender  offer  (for  which a  filing  has  been  made  with the
      Securities  and Exchange  Commission  (the "SEC") which purports to comply
      with  the  requirements  of  Section  14(d)  of the  Exchange  Act and the
      corresponding  SEC rules) is made for the stock of the Company,  which has
      not been negotiated and approved by the Board,  provided that in case of a
      tender offer described in this subsection 4, the Change in Control will be
      deemed to have occurred at the first time during the offer period when the
      Person (as defined in  subsection 1 above)  making the offer  beneficially
      owns or has accepted for payment  stock of the Company with 20% or more of
      the  combined  voting  power  of  the  then  Outstanding   Company  Voting
      Securities;  provided,  however,  that the Change in Control  shall  occur
      three (3) business days before such tender offer is to  terminate,  unless
      the offer is withdrawn first, if the Person making the offer could own, by
      the terms of the offer plus any shares  beneficially owned by that Person,
      stock  with  50% or  more  of  the  combined  voting  power  of  the  then
      Outstanding  Company Voting  Securities when the offer (and any subsequent
      offering period) terminates; or

            5. Approval by the shareholders of the Company of a plan of complete
      liquidation or dissolution of the Company.

            6. For  purposes of this  definition  of Change in Control,  (i) the
      term  "Company"  shall mean Nicor Inc. and shall  include any Successor to
      Nicor  Inc.;  and (ii) the term  "Successor  to Nicor Inc." shall mean any
      corporation,  partnership,  joint venture or other entity that succeeds to
      the interests of Nicor Inc. by means of a merger,  consolidation  or other
      restructuring   that  does  not  constitute  a  Change  in  Control  under
      subsections 1, 3 or 4 above.




                                                            Nicor Inc.
                                                            Form 10-K
                                                            Exhibit 23.01




                  CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



As independent public accountants, we hereby consent to the incorporation by
reference of our report, dated January 27, 2000, included in this Form 10-K,
into the company's previously filed Form S-3 Registration Statement in
connection with the Nicor Automatic Dividend Reinvestment and Stock Purchase
Plan (No. 33-56871), and Form S-8 Registration Statements in connection with
the Nicor Employee Stock Purchase Plan (No. 33-1732), the Nicor Gas Savings
Investment Plan (No. 33-56867), the Nicor Gas Thrift Plan (No. 33-60689), the
Birdsall Retirement Savings Plan (No. 333-28579), the Nicor 1989 Long-Term
Incentive Plan (No. 33-31029) and the Nicor 1997 Long-Term Incentive Plan
(No. 333-28699).


ARTHUR ANDERSEN LLP
Arthur Andersen LLP
Chicago, Illinois
March 20, 2000




                                                        Nicor Inc.
                                                        Form 10-K
                                                        Exhibit 24.01



                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                        ROBERT M. BEAVERS, JR.
                                        Robert M. Beavers, Jr.



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                           BRUCE P. BICKNER
                                           Bruce P. Bickner



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                         JOHN H. BIRDSALL, III
                                         John H. Birdsall, III



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                           THOMAS A. DONAHOE
                                           Thomas A. Donahoe



<PAGE>






                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                           DENNIS J. KELLER
                                           Dennis J. Keller



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                           CHARLES S. LOCKE
                                           Charles S. Locke



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                           WILLIAM A. OSBORN
                                           William A. Osborn


<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                          SIDNEY R. PETERSEN
                                          Sidney R. Petersen



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                               JOHN RAU
                                               John Rau



<PAGE>


                              POWER OF ATTORNEY




KNOW ALL MEN BY THESE PRESENTS:

      That the  undersigned,  a Director,  Officer,  or Director  and Officer of
Nicor Inc., an Illinois  corporation,  does hereby  constitute and appoint D. L.
CYRANOSKI and M. T. LORENZ,  and each of them, the undersigned's true and lawful
attorneys  and  agents,  each with full power and  authority  (acting  alone and
without  the other) to execute in the name and on behalf of the  undersigned  as
such Director,  Officer, or Director and Officer, the 1999 Annual Report on Form
10-K (and such amendment or amendments  thereto as may be necessary) to be filed
pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934,  hereby
granting  to such  attorneys  and  agents,  and  each of  them,  full  power  of
substitution and revocation in the premises; and hereby ratifying and confirming
all that such  attorneys and agents,  or any of them, may do or cause to be done
by virtue of these presents.

      IN WITNESS  WHEREOF,  I have  hereunto  signed this Power of Attorney this
20th day of January, 2000.





                                           PATRICIA A. WIER
                                           Patricia A. Wier


<TABLE> <S> <C>

<ARTICLE>                               UT
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
CONSOLIDATED   STATEMENT  OF  INCOME,   THE  CONSOLIDATED   BALANCE  SHEET,  THE
CONSOLIDATED  STATEMENT OF CAPITALIZATION,  THE CONSOLIDATED STATEMENT OF COMMON
EQUITY AND THE  CONSOLIDATED  STATEMENT  OF CASH FLOWS AND IS  QUALIFIED  IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                                 1,000,000

<S>                                     <C>
<PERIOD-TYPE>                           YEAR
<FISCAL-YEAR-END>                       DEC-31-1999
<PERIOD-END>                            DEC-31-1999
<BOOK-VALUE>                            PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                        1,611
<OTHER-PROPERTY-AND-INVEST>                        124
<TOTAL-CURRENT-ASSETS>                             508
<TOTAL-DEFERRED-CHARGES>                             0
<OTHER-ASSETS>                                     209
<TOTAL-ASSETS>                                   2,452
<COMMON>                                           117
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                                671
<TOTAL-COMMON-STOCKHOLDERS-EQ>                     788
                                6
                                          0
<LONG-TERM-DEBT-NET>                               422
<SHORT-TERM-NOTES>                                   1
<LONG-TERM-NOTES-PAYABLE>                           14
<COMMERCIAL-PAPER-OBLIGATIONS>                     343
<LONG-TERM-DEBT-CURRENT-PORT>                       74
                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                     804
<TOT-CAPITALIZATION-AND-LIAB>                    2,452
<GROSS-OPERATING-REVENUE>                        1,615
<INCOME-TAX-EXPENSE>                                66
<OTHER-OPERATING-EXPENSES>                       1,403
<TOTAL-OPERATING-EXPENSES>                       1,469
<OPERATING-INCOME-LOSS>                            146
<OTHER-INCOME-NET>                                  23
<INCOME-BEFORE-INTEREST-EXPEN>                     169
<TOTAL-INTEREST-EXPENSE>                            45
<NET-INCOME>                                       124
                          0
<EARNINGS-AVAILABLE-FOR-COMM>                      124
<COMMON-STOCK-DIVIDENDS>                            74
<TOTAL-INTEREST-ON-BONDS>                           37
<CASH-FLOW-OPERATIONS>                             206
<EPS-BASIC>                                       2.63
<EPS-DILUTED>                                     2.62


</TABLE>


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