Document:

<PAGE>

                                                                 EXHIBIT 10.4(c)

                                                          Contract No. 33182000D

                                                                    GGC-10476-CO

                      Firm Transportation Service Agreement
                               Rate Schedule TF-1

                                     between

                        COLORADO INTERSTATE GAS COMPANY

                                       and

                            ATMOS ENERGY CORPORATION

                              Dated: APRIL 1, 2003

<PAGE>

                                                          Contract No. 33182000D

                        TRANSPORTATION SERVICE AGREEMENT
                               RATE SCHEDULE TF-1

     The Parties identified below, in consideration of their mutual promises,
     agree as follows:

1.   TRANSPORTER: COLORADO INTERSTATE GAS COMPANY

2.   SHIPPER: ATMOS ENERGY CORPORATION

3.   APPLICABLE TARIFF: Transporter's FERC Gas Tariff, First Revised Volume No.
     1, as the same may be amended or superseded from time to time ("the
     Tariff).

4.   CHANGES IN RATES AND TERMS: Transporter shall have the right to propose to
     the FERC changes in its rates and terms of service, and this Agreement
     shall be deemed to include any changes which are made effective pursuant to
     FERC Order or regulation or provisions of law, without prejudice to
     Shipper's right to protest the same.

5.   TRANSPORTATION SERVICE: Transportation Service at and between Primary
     Point(s) of Receipt and Primary Point(s) of Delivery shall be on a firm
     basis. Receipt and Delivery of quantities at Secondary Point(s) of Receipt
     and/or Secondary Point(s) of Delivery shall be in accordance with the
     Tariff.

6.   POINTS OF RECEIPT AND DELIVERY: Shipper agrees to Tender Gas for
     Transportation Service and Transporter agrees to accept Receipt Quantities
     at the Primary Point(s) of Receipt identified in Exhibit "A." Transporter
     agrees to provide Transportation Service and Deliver Gas to Shipper (or for
     Shipper's account) at the Primary Point(s) of Delivery identified in
     Exhibit "A." Minimum and maximum receipt and delivery pressures, as
     applicable, are listed on Exhibit "A."

7.   RATES AND SURCHARGES: As set forth in Exhibit "B." For example, Transporter
     and Shipper may agree that a specified discount rate will apply: (a) only
     to certain specified firm service entitlements under this Agreement; (b)
     only if specified quantity levels are actually achieved under this
     Agreement (with higher rates, charges, and fees applicable to all
     quantities above those levels, or to all quantities under the Agreement if
     the specified levels are not achieved); (c) only to production reserves
     committed by the Shipper; (d) only during specified time periods; (e) only
     to specified Point(s) of Receipt, Pomt(s) of Delivery, mainline area
     segments, supply areas, Transportation routes, or defined geographical
     areas; or (f) in a specified relationship to the quantities actually
     Delivered (i.e., that the rates shall be adjusted in a specified
     relationship to quantities actually Delivered); provided, however, that any
     such discounted rates set forth above shall be between the minimum and
     maximum rates applicable to the sendee provided under this Agreement.

     In addition, the discount agreement may include a provision that if one
     rate component which was at or below the applicable maximum rate at the
     time the discount agreement was executed subsequently exceeds the
     applicable maximum rate due to a change in Transporter's maximum rates so
     that such rate component must be adjusted downward to equal the new
     applicable maximum rate, then other rate components may be adjusted upward
     to achieve the agreed overall rate, so long as none of the resulting rate
     components exceed the maximum rate applicable to that rate component. Such
     changes to rate components shall be applied prospectively, commencing with
     the date a Commission order accepts revised tariff sheets. However, nothing
     contained herein shall be construed to alter a refund obligation under
     applicable law for any period during which rates that had been charged
     under a discount agreement exceeded rates which ultimately are found to be
     just and reasonable.

8.   NEGOTIATED RATE AGREEMENT: YES____ NO X

9.   MAXIMUM DAILY QUANTITY (MDQ):

<TABLE>
<CAPTION>
MDQ (Dth/d)        EFFECTIVE
--------------------------------
<S>             <C>
6,121           4/01/03-9/30/06
</TABLE>

10.  TERM OF AGREEMENT:         Beginning:              APRIL 1, 2003

                                Extending through:      SEPTEMBER 30, 2006

<PAGE>

                                                          Contract No. 33182000D

11. NOTICES, STATEMENTS, AND BILLS:

        TO SHIPPER:
             INVOICES FOR TRANSPORTATION:
                 Atmos Energy Corporation
                 1301 Pennsylvania, Suite 800
                 Denver, Colorado 80203-5015
                 Attention: Gas Supply Colorado-Kansas Service Area

             ALL NOTICES:
                 Atmos Energy Corporation
                 P. O. Box 650205
                 Dallas, Texas 75265-0205
                 Attention: Contract Administration Colorado-Kansas Service Area

        TO TRANSPORTER:
                 See Payments, Notices, Nominations, and Points of Contact
                 sheets in the Tariff.

12.  SUPERSEDES AND CANCELS PRIOR AGREEMENT: When this Agreement becomes
     effective, it shall cancel and supersede the following agreement between
     the Parties: The Firm Transportation Service Agreement between Transporter
     and Shipper dated OCTOBER 1, 2001, referred to as Transporter's Agreement
     No. 33182000C.

13.  ADJUSTMENTS TO RATE SCHEDULE TF-1 AND/OR GENERAL TERMS AND CONDITIONS: N/A.

14.  INCORPORATION BY REFERENCE: This Agreement in all respects shall be subject
     to the provisions of Rate Schedule TF-1 and to the applicable provisions of
     the General Terms and Conditions of the Tariff as filed with, and made
     effective by, the FERC as same may change from time to time (and as they
     may be amended pursuant to Section 13 of the Agreement).

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement.

TRANSPORTER:                                   SHIPPER:

COLORADO INTERSTATE GAS COMPANY                ATMOS ENERGY CORPORATION

By: /s/ Thomas L. Price                        By: /s/ Gary L. Schlessman
    ------------------                             ---------------------
    Thomas L. Price                            Name: Gary L. Schlessman
    Vice President                             Title: President
                                                      (Colorado-Kansas Division)
[STAMP OF LEGAL DEBT]                          Accepted and agreed to this
                                               19 day of May, 2003.
Accepted and agreed to this
21 day of April, 2003.
<PAGE>

                                                          Contract No. 33182000D

                                   EXHIBIT "A"

                      Firm Transportation Service Agreement
                                     between
                         COLORADO INTERSTATE GAS COMPANY
                                       and
                            ATMOS ENERGY CORPORATION

                              Dated: APRIL 1, 2003

1. Shippers Maximum Delivery Quantity ("MDQ"): 6,121 Dth per Day.

<TABLE>
<CAPTION>
                                                    Primary Point(s) of
                                                     Receipt Quantity
Primary Point(s) of Receipt                           (Dth per Day)          Minimum Receipt        Maximum Receipt
         (Note 1)               Effective Dates         (Note 2)           Pressure (p.s.i.g.)     Pressure (p.s.i.g.)
---------------------------     ----------------    -------------------    -------------------    --------------------
<S>                             <C>                 <C>                    <C>                    <C>
NORTHERN SYSTEM:

Echo Springs MM                 4/01/03 - 9/30/06            300                                           850

Lost Cabin                      4/01/03 - 9/30/06          1,200                                         1,100

Uintah                          4/01/03 - 9/30/06            593                                           940
                                                       ---------
     TOTAL Northern:                                       2,093

CENTRAL SYSTEM:

Lakin MM                        4/01/03 - 9/30/06            491                                           220

SOUTHERN SYSTEM:

Big Canyon                      4/01/03 - 9/30/06            491                   350                     955

Mocane                          4/01/03 - 9/30/06          1,260                                            65
                                                       ---------
      TOTAL Southern:                                      1,751
                                                       ---------
      TOTAL                                                6,121
</TABLE>

<TABLE>
<CAPTION>
                                                    Primary Point(s) of
 Primary Point(s) of Delivery                        Delivery Quantity      Minimum Delivery        Maximum Delivery
          (Note 1)               Effective Dates       (Dth per Day)       Pressure (p.s.i.g.)     Pressure (p.s.i.g.)
-----------------------------   -----------------   -------------------    -------------------    --------------------
<S>                             <C>                 <C>                    <C>                    <C>
CANON CITY GROUP:

Canon City                      4/01/03 - 9/30/06          4,231                    100                   LP

Colorado State Penitentiary     4/01/03 - 9/30/06            298                                         100

Engineering Station 476+78      4/01/03 - 9/30/06              5                                          LP

Florence City Gate              4/01/03 - 9/30/06            989                                          60

Fremont Cty. Industrial Park    4/01/03 - 9/30/06              9                                          LP

Penrose City Gate               4/01/03 - 9/30/06            135                                          60

Penrose PBS-2                   4/01/03 - 9/30/06            129                                          LP

Portland City Gate              4/01/03 - 9/30/06             35                                         100

Pritchett City Gate             4/01/03 - 9/30/06             35                                         150
                                                       ---------
     TOTAL Canon City Group                                5,866
</TABLE>
<PAGE>

                                                          Contract No. 33182000D

                                   EXHIBIT "A"

<TABLE>
<CAPTION>
                                                         Primary Point(s) of
Primary Point(s) of Delivery                              Delivery Quantity       Minimum Delivery      Maximum Delivery
         (Note 1)                 Effective Dates           (Dth per Day)        Pressure (p.s.i.g.)   Pressure (p.s.i.g.)
--------------------------------------------------------------------------------------------------------------------------
<S>                               <C>                    <C>                     <C>                   <C>
EADS GROUP:

Brandon Station                   4/01/03 - 9/30/06              28                                            350

Eads City Gate                    4/01/03 - 9/30/06             207                                             60

Highline Taps:

Neoplan (Bent County)             4/01/03 - 9/30/06               3                                             LP

Penrose South(Fremont Cty)        4/01/03 - 9/30/06              11                                             LP

The Piggery (Fremont Cty.)        4/01/03 - 9/30/06               3                                             LP

L. J. Stafford (Baca County)      4/01/03 - 9/30/06               5                                             LP
                                                              -----
     TOTAL Eads Group                                           257
                                                              -----
McClave Delivery                  4/01/03 - 9/30/06             350                                            500
                                                              -----
Springfield                       4/01/03 - 9/30/06             700                                             LP
                                                              -----
     TOTAL                                                    6,121
--------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>

                                                 Primary Point(s) of
Primary Point(s) of                              Delivery Quantity
 Delivery Storage                                   (Dth per Day)           Minimum Delivery         Maximum Delivery
Injection (Note 1)         Effective Dates         (Notes 3 and 4)         Pressure (p.s.i.g.)      Pressure (p.s.i.g.)
-----------------------------------------------------------------------------------------------------------------------
<S>                        <C>                   <C>                       <C>                      <C>
Storage Injection          4/01/03-9/30/06             2,814
-----------------------------------------------------------------------------------------------------------------------
</TABLE>

NOTES:

(1)      Information regarding Point(s) of Receipt and Point(s) of Delivery,
         including legal descriptions, measuring Parties, and interconnecting
         Parties, shall be posted on Transporter's Electronic Bulletin Board.
         Transporter shall update such information from time to time to include
         additions, deletions, or any other revisions deemed appropriate by
         Transporter.

(2)      Each Point of Receipt Quantity may be increased by an amount equal to
         Transporter's Fuel Reimbursement percentage. Shipper shall be
         responsible for providing such Fuel Reimbursement at each Point of
         Receipt on a pro rata basis based on the quantities received on any Day
         at a Point of Receipt divided by the total quantity Delivered at all
         Point(s) of Delivery under this Transportation Service Agreement.

(3)      The sum of the Delivery Quantities at Point(s) of Delivery shall be
         equal to or less than Shipper's MDQ.

(4)      Transporter's obligation to make Deliveries to Transporter's storage
         injection point under this Agreement and to Transporter's storage
         injection point under all other Firm Transportation Service Agreements
         between Transporter and Shipper providing for deliveries to
         Transporter's storage injection point shall be limited by the
         provisions of Rate Schedule NNT-1 and Shipper's NNT-1 service
         agreement(s).

<PAGE>

                                                          Contract No. 33182000D

                                   EXHIBIT "B"

                      Firm Transportation Service Agreement
                                     between
                         COLORADO INTERSTATE GAS COMPANY
                                       and
                            ATMOS ENERGY CORPORATION

                               Dated: APRIL 1, 2003

<TABLE>
<CAPTION>

Primary Point(s)      Primary Point(s)       R(1) Reservation      Commodity                           Fuel
   of Receipt           of Delivery                Rate(s)            Rate       Term of Rate      Reimbursement    Surcharges
------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>                    <C>                   <C>          <C>                <C>              <C>
 As listed on          As Listed on                (Note 1)        (Note 1)     4/01/03-9/30/06       (Note 2)        (Note 3)
 Exhibit "A"           Exhibit "A"
------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
 Secondary          Secondary
Point(s) of        Point(s) of       R(1) Reservation       Commodity                                Fuel
  Receipt            Delivery              Rate(s)             Rate       Term of Rate           Reimbursement      Surcharges
------------------------------------------------------------------------------------------------------------------------------
<S>                <C>               <C>                    <C>          <C>                     <C>                <C>
   All                 All                 (Note 1)          (Note 1)    4/01/03-9/30/06             (Note 2)         (Note 3)
------------------------------------------------------------------------------------------------------------------------------
</TABLE>

NOTES:

(1)      Unless otherwise agreed by the Parties in writing, the rates for
         service hereunder shall be Transporter's maximum rates for service
         under Rate Schedule TF-1 or other superseding Rate Schedules, as such
         rates may be changed from time to time.

(2)      Fuel Reimbursement shall be as stated on Transporter's Schedule of
         Surcharges and Fees in the Tariff, as they may be changed from time to
         time, unless otherwise agreed between the Parties.

(3)      Surcharges, If Applicable:

         All applicable surcharges, unless otherwise specified, shall be the
         maximum surcharge rate as stated in the Schedule of Surcharges and Fees
         in the Tariff, as such surcharges may be changed from time to time,

         GAS QUALITY CONTROL SURCHARGE:

         The Gas Quality Control Reservation Rate and commodity rate shall be
         assessed pursuant to Article 20 of the General Terms and Conditions as
         set forth in the Tariff.

         GRI:

         The GRI Surcharge shall be assessed pursuant to Article 18 of the
         General Terms and Conditions as set forth in the Tariff.

         ORDER NO. 636 TRANSITION COST MECHANISM:

         Surcharge(s) shall be assessed pursuant to Article 21 of the General
         Terms and Conditions as set forth in the Tariff.

         ACA:

         The ACA Surcharge shall be assessed pursuant to Article 19 of the
         General Terms and Conditions as set forth in the Tariff.<PAGE>

                                                                 EXHIBIT 10.4(d)

                                                          Contract No. 31044000A
                                                                   GGC- 10474-CO

         No-Notice Storage and Transportation Delivery Service Agreement
                               Rate Schedule NNT-1

                                     between

                         COLORADO INTERSTATE GAS COMPANY

                                       and

                               GREELEY GAS COMPANY
                    (A DIVISION OF ATMOS ENERGY CORPORATION)

                             Dated: OCTOBER 1, 2002

<PAGE>

                                                          Contract No. 31044000A

         NO-NOTICE STORAGE AND TRANSPORTATION DELIVERY SERVICE AGREEMENT
                               RATE SCHEDULE NNT-1

         The Parties identified below, in consideration of their mutual
         promises, agree as follows:

1.       TRANSPORTER: COLORADO INTERSTATE GAS COMPANY

2.       SHIPPER: GREELEY GAS COMPANY, (A DIVISION OF ATMOS ENERGY CORPORATION)

3.       APPLICABLE TARIFF: Transporter's FERC Gas Tariff, First Revised Volume
         No. 1, as the same may be amended or superseded from time to time ("the
         Tariff").

4.       CHANGES IN RATES AND TERMS: Transporter shall have the right to propose
         to the FERC changes in its rates and terms of service, and this
         Agreement shall be deemed to include any changes which are made
         effective pursuant to FERC Order or regulation or provisions of law,
         without prejudice to Shipper's right to protest the same.

5.       TRANSPORTATION SERVICE: Transportation Service at and between Point of
         Withdrawal and Primary Point(s) of Delivery shall be on a firm basis.
         Delivery of quantities at Secondary Point(s) shall be in accordance
         with the Tariff.

6.       DELIVERY: Transporter agrees to transport and deliver Delivery
         Quantities to Shipper (or for Shipper's account) at the Point(s) of
         Delivery identified in the attached Exhibit "A." Minimum and Maximum
         delivery pressures, as applicable, are listed on Exhibit "A."

7.       RATES AND SURCHARGES: As set forth in Exhibit "B." For example,
         Transporter and Shipper may agree that a specified discount rate will
         apply: (a) only to certain specified firm service entitlements under
         this Agreement; (b) only if specified quantity levels are actually
         achieved under this Agreement (with higher rates, charges, and fees
         applicable to all quantities above those levels, or to all quantities
         under the Agreement if the specified levels are not achieved); (c) only
         to production reserves committed by the Shipper; (d) only during
         specified time periods; (e) only to specified Point(s) of Receipt,
         Point(s) of Delivery, mainline area segments, supply areas,
         Transportation routes, or defined geographical areas under the
         associated Transportation Agreement; or (f) in a specified relationship
         to the quantities actually Delivered (i.e., that the rates shall be
         adjusted in a specified relationship to quantities actually Delivered);
         provided, however, that any such discounted rates set forth above shall
         be between the minimum and maximum rates applicable to the service
         provided under this Agreement.

         In addition, the discount agreement may include a provision that if one
         rate component which was at or below the applicable maximum rate at the
         time the discount agreement was executed subsequently exceeds the
         applicable maximum rate due to a change in Transporter's maximum rates
         so that such rate component must be adjusted downward to equal the new
         applicable maximum rate, then other rate components may be adjusted
         upward to achieve the agreed overall rate, so long as none of the
         resulting rate components exceed the maximum rate applicable to that
         rate component. Such changes to rate components shall be applied
         prospectively, commencing with the date a Commission order accepts
         revised tariff sheets. However, nothing contained herein shall be
         construed to alter a refund obligation under applicable law for any
         period during which rates that had been charged under a discount
         agreement exceeded rates which ultimately are found to be just and
         reasonable.

8.       MAXIMUM DELIVERY QUANTITY (" MDQ"): 12,985 Dth per Day
         MAXIMUM AVAILABLE CAPACITY ("MAC"): 422,142 Dth
         MAXIMUM DAILY INJECTION QUANTITY ("MDIQ"): 4,151 Dth per Day
         MAXIMUM DAILY WITHDRAWAL QUANTITY ("MDWQ"): 12,985 Dth per Day

         All storage entitlements as stated herein ("MAC", "MDIQ", and "MDWQ")
         are based on an Average Thermal Content of Gas in Storage of 1,000 Btu
         per cubic foot. The Available Daily Injection Quantity ("ADIQ"),
         Available Daily Withdrawal Quantity ("ADWQ"), and storage entitlements
         shall be subject to the General Terms and Conditions of the Tariff and
         stated on Transporter's Electronic Bulletin Board.

                                        1

<PAGE>

                                                          Contract No. 31044000A

9.       NEGOTIATED RATE AGREEMENT: NO

10.      TERM OF AGREEMENT: Beginning: OCTOBER 1, 2002
                            Extending through: APRIL 30, 2005

11.      NOTICES, STATEMENTS, AND BILLS:

         TO SHIPPER:

             INVOICES FOR TRANSPORTATION:
                Greeley Gas Company, (a division of Atmos Energy Corporation)
                160 Lincoln Centre Three
                5430 LBJ Freeway
                Dallas, Texas 75240
                Attention: John Hack

             ALL NOTICES:

                Greeley Gas Company, (a division of Atmos Energy Corporation)
                160 Lincoln Centre Three
                5430 LBJ Freeway
                Dallas, Texas 75240
                Attention: John Hack

         TO TRANSPORTER:

             See Notices, Payments, Nominations, and Points of Contact
             sheets in the Tariff.

12.      SUPERSEDES AND CANCELS PRIOR AGREEMENT: When this Agreement becomes
         effective, it shall supersede and cancel the following agreement
         between the Parties: The No-Notice Storage and Transportation Delivery
         Service Agreement between Transporter and Shipper dated October 1,
         2001, referred to as Transporter's Agreement No. 31044000.

13.      ADJUSTMENTS TO RATE SCHEDULE NNT-1 AND/OR GENERAL TERMS AND CONDITIONS:
         N/A.

14.      INCORPORATION BY REFERENCE: This Agreement in all respects shall be
         subject to the provisions of Rate Schedule NNT-1 and to the applicable
         provisions of the General Terms and Conditions of the Tariff as filed
         with, and made effective by, the FERC as same may change from time to
         time (and as they may be amended pursuant to Section 12 of the
         Agreement).

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement.

TRANSPORTER:                                SHIPPER:

COLORADO INTERSTATE GAS COMPANY             GREELEY GAS COMPANY, (a division of
                                            Atmos Energy Corporation

By: /s/ Thomas L. Price                     By: /s/ Robert E. Mattingly
    ------------------------                    -------------------------------
        Thomas L. Price                     Name: ROBERT E. MATTINGLY
         Vice President                     Title: VICE PRESIDENT

[STAMP OF LEGAL DEBT]                       Accepted and agreed to this
                                            18th day of November, 2002.
Accepted and agreed to this
6th day of November, 2002.

                                        2

<PAGE>

                                                          Contract No. 31044000A

                                   EXHIBIT "A"

         No-Notice Storage and Transportation Delivery Service Agreement
                                     between
                         COLORADO INTERSTATE GAS COMPANY
                                       and

                              GREELEY GAS COMPANY,
                    (A DIVISION OF ATMOS ENERGY CORPORATION)

                              dated: OCTOBER 1,2002

1. Shipper's Maximum Delivery Quantity ("MDQ"): 12,985 Dth per Day.

2. Shipper's Maximum Available Capacity ("MAC"): 422,142 Dth.

3. Shipper's Maximum Daily Injection Quantity ("MDIQ"): 4,151 Dth per Day.

4. Shipper's Maximum Daily Withdrawal Quantity ("MDWQ"): 12,985 Dth per Day.

<TABLE>
<CAPTION>
                                       Primary Point(s) of
Primary Point(s) of Delivery             Delivery Quantity                Minimum Delivery                   Maximum Delivery
                                       (Dth per Day) (Note 1)            Pressure (p.s.i.g.)                Pressure (p.s.i.g.)
-------------------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                               <C>                                <C>
CANON CITY GROUP

     Canon City                               7,799                                                              (Note 2)

     Colorado State Penitentiary                552                                                                100

     Engineer's Station 476+78                   10                                                                 LP

     Florence City Gate                       1,823                                                                 60

     Fremont County Industrial Park              16                                                                 LP

     Penrose City Gate                          248                                                                 60

     Penrose PBS-2                              238                                                                 LP

     Portland City Gate                          65                                                                100

     Pritchett City Gate                         65                                                                150
                                             ------
       TOTAL CANON CITY GROUP                10,816
-------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       A-1

<PAGE>

                                                          Contract No. 31044000A

                                   EXHIBIT "A"

<TABLE>
<CAPTION>
                                            Primary Point(s) of
                                             Delivery Quantity           Minimum Delivery        Maximum Delivery
Primary Point(s) of Delivery                (Dth per Day) (Note 1)      Pressure (p.s.i.g.)     Pressure (p.s.i.g.)
-------------------------------------------------------------------------------------------------------------------
<S>                                         <C>                         <C>                     <C>
 McCLAVE GROUP

    McClave Delivery                                 650                                                500

    Brandon Station                                   52                                                350

    Eads City Gate                                   382                                                 60

    Highline Taps:
    Nepolan (Bent County)                              8                                                 LP

    Penrose (Fremont County)                          20                                                 LP

    Piggery (Fremont County)                           7                                                 LP

    L.J Stafford (Baca County)                         7                                                 LP
                                                  ------
    TOTAL McCLAVE GROUP                            1,126
                                                  ------
SPRINGFIELD                                        2,993                                                 LP
                                                  ------
    TOTAL                                         14,935
-------------------------------------------------------------------------------------------------------------------
</TABLE>

NOTES:

(1) The sum of the Delivery Quantities at Point(s) of Delivery shall not be
greater than Shipper's MDQ.

(2) Line Pressure but not less than 100 p.s.i.g.

                                       A-2

<PAGE>

                                                          Contract No. 31044000A

                                   EXHIBIT "B"

         No-Notice Storage and Transportation Delivery Service Agreement
                                     between
                        COLORADO INTERSTATE GAS COMPANY
                                       and
                              GREELEY GAS COMPANY,
                    (a division of Atmos Energy Corporation)

                             Dated: OCTOBER 1, 2002

<TABLE>
<CAPTION>
                                             Commodity
                                           Injection Rate         Fuel Reimbursement         Surcharges
-------------------------------------------------------------------------------------------------------
<S>                                        <C>                    <C>                        <C>
Storage Injection.................           (Note 1)                   (Note 2)               (Note 3)
------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                        R1 Reservation            Commodity
    Primary Point(s) of Delivery             Rate                Delivery Rate       Term of Rate          Surcharges
---------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                      <C>                <C>                    <C>
 As listed on Exhibit "A"                  (Note 1)                 (Note 1)        Through 4/30/05         (Note 3)
-------------------------------------------------------------------------------------------------------------------
</TABLE>

  NOTES:

  (1)    Unless otherwise agreed by the Parties in writing, the rates for
         service hereunder shall be Transporter's maximum rates for service
         under Rate Schedule NNT-1 or other superseding Rate Schedule, as such
         rates may be changed from time to time.

  (2)    Fuel Reimbursement shall be as stated on Transporter's Schedule of
         Surcharges and Fees in the Tariff, as they may be changed from time to
         time, unless otherwise agreed between the Parties.

  (3)    Applicable Surcharges:

         All applicable surcharges, unless otherwise specified, shall be the
         maximum surcharge rate as stated in the Schedule of Surcharges and Fees
         in the Tariff, as such surcharges may be changed from time to time.

         GAS QUALITY CONTROL SURCHARGE:

         The Gas Quality Control Reservation Rate and commodity rate shall be
         assessed pursuant to Article 20 of the General Terms and Conditions as
         set forth in the Tariff.

         GRI:

         The GRI Surcharge shall be assessed pursuant to Article 18 of the
         General Terms and Conditions as set forth in the Tariff.

         ORDER NO. 636 TRANSITION COST MECHANISM:

         Surcharge(s) shall be assessed pursuant to Article 21 of the General
         Terms and Conditions as set forth in the Tariff.

         ACA:

         The ACA Surcharge shall be assessed pursuant to Article 19 of the
         General Terms and Conditions as set forth in the Tariff.

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