TRANSCONTINENTAL GAS PIPELINE CORPORATION

2800 Post Oak Boulevard
P.O. Box 1396
Houston, TX 77251-1396
713-439-2000



March 4, 1997

Ms. Eileen Stanek
AGL Resources Inc.
303 Peachtree Street, N.E.
Atlanta, GA 30308


Dear Eileen:

Enclosed  for  your  records  are  fully  executed  originals  of the  following
agreements for the 1998 Cherokee Expansion Project:

o      Precedent Agreement

o      Side Letter agreement regarding supply arrangements

Transco hopes to file the  certificate  application for the project on March 31,
1997, I will forward a copy for your records when the filing is available.

Hope you had a good vacation!

Best regards,

/s/ Craig Adams

Craig Adams
Project Development


Enclosure










Transco                                    1998 CHEROKEE EXPANSION PROJECT
                                                 PRECEDENT AGREEMENT



     THIS PRECEDENT AGREEMENT,  entered into this 28th day of February, 1997, is
by and  between  TRANSCONTINENTAL  GAS  PIPE  LINE  CORPORATION  ("Transco"),  a
Delaware  corporation,  and ATLANTA  GAS LIGHT  COMPANY  ("Atlanta"),  a Georgia
corporation.  Transco and  Atlanta are  sometimes  referred to  individually  as
"Party" and jointly as "Parties".



                                   WITNESSETH


     WHEREAS,  Transco  conducted an open season from  December 18, 1996 through
January 20,  1997,  during which it accepted  requests  for firm  transportation
service  to  be  made  available   through  an  expansion  of  its  transmission
facilities, hereinafter referred to as the "1998 Cherokee Expansion Project";

     WHEREAS, Atlanta submitted a Complete Request (as defined in Transco's open
season  announcement)  during the open  season and desires  firm  transportation
service as part of the 1998 Cherokee  Expansion Project for 85,000 dekatherms of
gas per day ("Dt/D") from the receipt point(s)  specified in exhibit A hereto to
the delivery point(s) specified in exhibit B hereto;

     WHEREAS,  subject to the terms and conditions of this Precedent  Agreement,
Transco is willing to provide  such firm  transportation  service for Atlanta as
part of the 1998 Cherokee Expansion Project commencing as soon as all rights and
regulatory  approvals  are  received  and  accepted  by  Transco  and all of the
necessary facilities are constructed and ready for service.

                                        1





     NOW THEREFORE,  in  consideration  of the mutual  covenants herein assumed,
Transco and Atlanta hereby agree as follows:


     1.  Rights  and  Approvals.  Following  the  execution  by  Transco of this
Precedent Agreement,  Transco shall seek such contract rights,  property rights,
financing arrangements and regulatory approvals,  including, without limitation,
the  requisite  authorizations  from the Federal  Energy  Regulatory  Commission
("FERC"), including rates based on a straight fixed-variable ("SFV") rate design
methodology and an incremental  cost of service,  as may be necessary to provide
firm transportation  service for Atlanta of 85,000 Dt/D from point(s) of receipt
set forth in  Exhibit  A hereto  point(s)  of  delivery  set forth in  exhibit B
hereto.  Transco  reserves the right to file and prosecute  applications for any
required  authorizations,  any  supplements,  or  amendments  thereto,  and,  if
necessary,  court review, in such manner as it deems to be in its best interest.
     Atlanta  agrees to use its good faith efforts to cooperate with and support
Transco in obtaining such  regulatory  approvals and to provide Transco with any
necessary  information  reasonably requested in order to obtain contract rights,
property rights,  financing  arrangements and/or regulatory approvals,  provided
that Transco shall, upon Atlanta's request, seek confidential  treatment of such
information.  In that regard, Atlanta agrees to file with the FERC in support of
Transco's certificate  application (including rates based on the SFV rate design
methodology)  filed  pursuant  to  Section  7(c)  of the  Natural  Gas Act for a
certificate  of  public  convenience  and  necessity  and  authorizing  the 1998
Cherokee  Expansion  Project ("FERC  Authorization").  In addition,  if the FERC
determines  that  information  relating to  Atlanta's  markets,  gas supply,  or
upstream  transportation  or storage  arrangements  is  required  from  Transco,
Atlanta shall provide Transco with such information in a timely manner to enable
Transco to respond  within the time required by the FERC.

     2.  Service  Agreement.  Within  thirty  (30) days  after the date  Transco
receives and accepts the FERC Authorization, on terms satisfactory to Transco in
its sole  opinion,  Transco  and  Atlanta  shall  deliver  and execute a service
agreement under Transco's Rate Schedule FT ("Service Agreement"),  provided that
this  Precedent  Agreement  has not  been  previously  terminated.  The  Service
Agreement  shall provide for the firm  transportation  by Transco for Atlanta of
85,000 Dt/D




                                        2





from point(s) of receipt set forth in exhibit A hereto  point(s) of delivery set
forth in Exhibit B hereto.

     3. Rates. For the subject firm  transportation  service,  Atlanta agrees to
pay rates as approved by the FERC.

     4. Term.  Transco's  obligation to provide the firm transportation  service
contemplated herein and Atlanta's  obligation to pay Transco reservation charges
for such service shall commence on the first day on which  Transco's  facilities
necessary to provide firm service to Atlanta under the 1998  Cherokee  Expansion
Project  have been  constructed  and are  ready for  service  as  determined  in
Transco's sole opinion.  Such firm  transportation  service shall continue for a
primary  term of fifteen  (15) years from the date that the firm  transportation
service commences, and year-to-year thereafter subject to termination after such
primary term by either Party upon one (1) year prior written notice to the other
Party.

     5. Termination of Agreements.  If Transco has not received and accepted the
necessary  FERC  Authorizations  on or  before  May 31,  1999,  then at any time
thereafter until Transco receives and accepts such FERC  Authorizations,  either
Party shall have the right to terminate this Precedent  Agreement by giving (30)
days advance  written notice to the other Party;  provided,  however,  that such
termination  shall not be effective if during the 30-day period Transco receives
and accepts the necessary FERC Authorizations.  Additionally, if Transco has not
commenced the firm shall have the right to terminate  this  Precedent  Agreement
and the Service  Agreement  by giving  twenty-four  (24) hours  advance  written
notice to the other  Party;  provided  that such right must be  exercised  on or
before November 2, 2000 or else such right shall be waived.

     6.  Construction,  After both Parties'  execution of the Service  Agreement
pursuant to Paragraph 2 above and Transco's  receipt and acceptance of all other
necessary  contracts  rights,   property  rights,   financing  arrangements  and
regulatory approvals in a form and substance





                                        3





satisfactory  to Transco in its sole  opinion,  Transco  shall  proceed with the
construction  of the  facilities  so as to begin firm  service  by a  projected
in-service  date of  November  1, 1998.  If Transco is unable to  complete  such
construction   and  place  such  facilities  into  operation  by  such  proposed
in-service date despite its exercise of due diligence, Transco shall continue to
proceed with due diligence to complete such construction,  place such facilities
in operations and commence service for Atlanta at the earliest  practicable date
thereafter. Transco shall not be liable in any manner to Atlanta, nor shall this
Precedent  agreement  or the Service  Agreement  be subject to  termination  if,
despite Transco's  exercise of due diligence,  Transco is unable to complete the
construction  of  such  facilities  and  commence  firm  transportation  service
contemplated herein by the proposed in-service date.

     7.  Prepayment  Refund.  Transco  and  Atlanta  agree  that the  prepayment
submitted  by Atlanta  during the open  season for the 1998  Cherokee  Expansion
Project plus any interest that accrues on the prepayment amount (any interest on
the  prepayment  amount  calculated  hereunder  shall be a the interest rate set
forth in Section 7 of the General  Terms and  Conditions  of Transco's  FERC Gas
Tariff) prior to the in-service date of the project will be applied to Atlanta's
reservation charges due of the first month of firm transportation  service under
the project.  In the event that service commences on a date other than the first
day of the month,  the  reservation  charge will be prorated and the  prepayment
plus accrued interest will be applied to such pro rated  reservation  charge. In
the event that Atlanta terminates this Precedent Agreement pursuant to Paragraph
5 above, Transco shall refund Atlanta's prepayment plus accrued interest.

     8.  Remedies.  Atlanta  recognizes  that  Transco will be required to incur
material expenses to construct the 1998 Cherokee Expansion Project facilities by
a projected in-service date of November 1, 1998. In the event that Atlanta fails
to perform its  obligations  under this Precedent  Agreement or terminates  this
Precedent  Agreement in a manner  inconsistent  with Paragraph 5 above,  Transco
shall have the right to retain Atlanta's prepayment (plus accrued interest) made
in accordance with Atlanta's request for firm  transportation  service under the
1998 Cherokee  Expansion Project and to seek any other legal remedies  available
to Transco, provided that any such legal

                                        4





remedy  which is a monetary  remedy  shall be reduced by an amount  equal to the
prepayment (plus accrued interest) retained by Transco.

      9. Notice.  Notices under this Precedent Agreement shall be in writing and
shall be addressed as follows:

If to Atlanta:

Thomas H. Benson
Executive Vice President and Chief Operating Officer
Atlanta Gas Light Company
303 Peachtree Street, N.E.
Atlanta, GA 30308-3249
Fax:  404/584-3703

If to Transco:

Transcontinental Gas Pipe Line Corporation
2800 Post Oak Boulevard
P. O. Box 1396
Houston, Texas  77251-1396
Attention: Customer Services
Fax:  713/215-2549

Notices may abe given by hand, electronic transmission, mail or courier. Notices
shall be deemed given upon the date the notice is sent.  Either Party may change
its address or telecopy number for notices hereunder by providing written notice
of such change to the other Party.

     10.  Assignment.  Any individual or entity which shall succeed by purchase,
merger or  consolidation  of the  properties  of  Transco  or  Atlanta  shall be
entitled  to  the  rights  and  shall  be  subject  to  the  obligations  of its
predecessor in title under this Precedent  Agreement.  Either Party may, without
prior  consent  of the  other  Party,  pledge,  mortgage  or assign  its  rights
hereunder as security for its  indebtedness;  otherwise,  any assignment of this
Precedent Agreement or any of the rights and obligations hereunder shall be void
and of no force or effect unless the  assigning  Party first obtains the consent
thereto in writing of the other Party.  With respect to the foregoing  sentence,
Atlanta  and  Transco  hereby  agree to execute  and  deliver to any  pledgee or
mortgagee of the other

                                        5





Party a consent to  assignment  to the extent such consent  does not  materially
alter  any  of the  terms  and  conditions  of  this  Precedent  Agreement.  Any
assignment  hereof shall be subject to the receipt and  acceptance by Transco of
any  necessary  regulatory  or  governmental   authorizations.   This  Precedent
Agreement shall be binding upon and shall inure to the benefit of the respective
authorized successors and assigns.

     11. Governing Law. This Precedent Agreement and any action, claims, demands
or settlements  hereunder  shall be governed by and construed in accordance with
the laws of the State of Texas, excluding, however, any conflicts of laws, rules
or  principles  which  might  require  the  application  of the laws of  another
jurisdiction.  Any action or proceeding arising out of this Precedent  Agreement
must be brought  in the courts of the State of Texas with venue in the  District
Courts of  Harris  County;  provided,  however,  that to the  extent a basis for
federal jurisdiction exists,  Transco or Atlanta may in the alternative bring an
action in the United States  District Court for the Southern  District of Texas.
The Parties  irrevocably  waive any objections they might otherwise have to such
jurisdiction or venue, whether on the grounds of inconvenience or otherwise, and
any rights they might  otherwise have to bring action in other  jurisdiction  or
venue.

     12.  Third  Persons.   Except  as  expressly  provided  in  this  Precedent
Agreement, nothing herein expressed or implied is intended or shall be construed
to confer upon or to give any person not a Party hereto any rights,  remedies or
obligations under or by reason of this Precedent Agreement.

     13.  Laws  and  Regulatory  Bodies.   This  Precedent   Agreement  and  the
obligations of the Parties  hereunder are subject to all applicable laws, rules,
orders and regulations of governmental  authorities having  jurisdiction and, in
the event of conflict,  such laws, rules, orders and regulations of governmental
authorities having jurisdiction shall control.

     14.  Captions.  The  titles  to each of the  paragraphs  in this  Precedent
Agreement  are included  for  convenience  of  reference  only and shall have no
effect on, or be deemed as part of the

                                        6





text of this Precedent Agreement.

     15.  Severability.  Any  provision  of  this  Precedent  Agreement  that is
prohibited or unenforceable in any jurisdiction  shall, as to that jurisdiction,
be ineffective to the extent of that  prohibition  or  unenforceability  without
invalidating  the  remaining  provisions  hereof or  affecting  the  validity or
enforceability of that provision in any other jurisdiction.

     16. Further  Assurances.  Each Party agrees to execute and deliver all such
other and additional  instruments and documents and to do such other acts as may
be reasonably necessary to effectuate the terms and provisions of this Precedent
Agreement.

     IN WITNESS WHEREOF, the Parties have executed this Precedent Agreement,  in
duplicate originals, as of the date first above written.

TRANSCONTINENTAL GAS PIPE LINE CORPORATION

By:  /s/ Frank J. Ferazzi
     Frank J. Ferazzi
     Vice President, Customer Service



ATLANTA GAS LIGHT COMPANY

By:  /s/ Thomas H. Benson
     Thomas H. Benson
     Executive Vice President & Chief Operating Officer




                                        7





                                    EXHIBIT A

                            Specified Receipt Points

                            Atlanta Gas Light Company

                  Transportation Contract Quantity: 85,000 DT/D


            Receipt Points                Maximum Daily Quantity at Each Receipt
                                                       Point(1)
Point of interconnection between Transco's           85,000 Dt/D
mainline and Mobile Bay Lateral at milepost
  784.66 in Choctaw County, Alabama











(1) These  quantities  do not include  the  additional  quantities  of gas to be
retained  by  Transco  for  compressor  fuel and line loss  make-up.  Therefore,
Atlanta  shall also deliver or cause to be delivered at the receipt  points such
additional  quantities of gas to be retained by Transco for compressor  fuel and
line loss make-up.

                                                         8




                                    Exhibit B

                            Specified Delivery Points

                            Atlanta Gas Light Company

                  Transportation Contract Quantity: 85,000 Dt/D


         Delivery Points              Maximum Daily Quantity at Each Delivery
                                                     Point(2)

              Suwanee                                 85,000















(2)  Deliveries to or for the account of Atlanta at the delivery  point(s) shall
be subject to the limits of the  Delivery  Point  Entitlements  ("DPEs") at such
delivery  points,  as such DPEs are set forth in  Transco's  FERC Gas  Tariff as
amended from time to time.

                                        9



 TRANSCONTINENTAL GAS PIPELINE CORPORATION

2800 Post Oak Boulevard
P.O. Box 1396
Houston, TX 77251-1396
713-439-2000


February 19, 1997

Mr. Thomas H. Benson
Senior Vice President and Chief Operating Officer
Atlanta Gas Light Company
303 Peachtree Street, N. E.
Atlanta, GA 30308-3249

Re:    1998 Cherokee Expansion Project


Dear Mr. Benson:

Transcontinental  Gas Pipe Line  Corporation  ("Transco")  and Atlanta Gas Light
Company  ("Atlanta")  are parties to a Precedent  Agreement  dated February 28 ,
1997, providing the terms and conditions for Atlanta's subscription to 85,000 dt
per day of firm  transportation  service under Transco's 1998 Cherokee Expansion
Project.  Atlanta has requested  that it be permitted to terminate the Precedent
Agreement  in the event it is unable to secure  gas supply  arrangements  at the
point of receipt set forth in the Precedent  Agreement.  Transco is agreeable to
Atlanta's  request,  subject to certain  conditions.  Accordingly,  Transco  and
Atlanta hereby agree as follows:

1.   If Atlanta has not secured,  on or before any one of the  respective  dates
     set forth  below (each such date is  respectively  referred to as a "Notice
     Date"), arrangements with one or more sellers of natural gas which in total
     will provide at least two years of natural gas supplies for Atlanta's  firm
     transportation capacity under the 1998 Cherokee Expansion Project,  Atlanta
     shall have the right to terminate the Precedent  Agreement by (i) providing
     written  notice  of  termination  to  Transco  on or  before a Notice  Date
     (referred to as the  "Applicable  Notice Date" and (ii)  delivering,  on or
     before the Applicable Notice Date, payment of the reimbursement  amount set
     forth below which corresponds to the Applicable Notice Date. Upon Transco's
     receipt of timely delivered termination notice and reimbursement amount, if
     any, the Precedent Agreement shall automatically terminate.






Mr. Thomas H. Benson
Atlanta Gas Light Company
February 19, 1997
Page 2

Notice Date                             Reimbursement Amount(1)
March 31, 1997                                        None
April 30, 1997                                        $360,000
May 31, 1997                                          $550,000
June 30, 1997                                       $1,000,000

2.   Notices  under  this  letter  agreement  shall be in  writing  and shall be
     addressed as follows:

     If to Atlanta:

     Thomas H. Benson
     Senior Vice President and Chief Operating Officer
     Atlanta Gas Light Company
     303 Peachtree Street, N. E.
     Atlanta, GA 30308-3249
     Fax:  404/584-3703

     If to Transco:

     Transcontinental Gas Pipe Line Corporation
     2800 Post Oak Boulevard
     P. O. Box 1396
     Houston, Texas 77251-1396
     Attention: Director, Project Development
     Fax:  713/215-2459

     Notices may be delivered by fax, and notices shall be deemed delivered
     upon receipt by the receiving party. Either party may change its address or
     fax number for notices hereunder by providing written notice of such change
     to the other party.

3.  This letter agreement shall be effective as of the date first above written.


(1) In addition to the  reimbursement  amount,  Transco  shall have the right to
retain  Atlanta's  $50,000  prepayment  (plus accrued  interest)  submitted with
Atlanta's request for service under the project.






Mr. Thomas H. Benson
Atlanta Gas Light Company
February 19, 1997
Page 3

4.  This letter agreement shall be governed by the laws of the State of Texas.

5.  Any assignment of this letter  agreement by either party to an entity other
    than an affiliate shall be void and of no force or effect.

If the foregoing is agreeable to Atlanta,  please execute both originals of this
letter agreement and return them to Transco. Upon receipt,  Transco will execute
both duplicate originals and return one for Atlanta's records.

                                         Sincerely,

                                         TRANSCONTINENTAL GAS PIPE LINE
                                                  CORPORATION



                                        By: /s/ Frank J. Ferazzi
                                                Frank J. Ferazzi
                                                Vice President, Customer Service

Accepted and Agreed:
ATLANTA GAS LIGHT COMPANY

By:/s/Thomas H. Benson
Thomas H. Benson
Executive Vice President and Chief Operating Officer