Transwestern Pipeline Company

Second Revised Volume No. 1

Effective Date: 02/01/1993, Docket: RS92- 87-003, Status: Effective

Original Sheet No. 150 Original Sheet No. 150 : Effective

TRANSPORTATION SERVICE AGREEMENT - FORM N

(continued)

9. All quantities of gas hereunder shall be reported in dekatherms, and

shall be determined by multiplying each Mcf of dry gas received and

delivered by the dry heating value thereof. Any gas received and

delivered to correct an Operational Imbalance shall be adjusted for

variations in heating value. Unless otherwise mutually agreed,

measurement of gas for all purposes hereunder shall be in accordance

with the provisions set forth in Transporter's then-effective FERC

Gas Tariff.

10. This Agreement is entered into in order to facilitate operations and

accounting between the Parties, and shall have no effect upon the

Shipper Agreements or upon the effectiveness of any Party's FERC Gas

Tariff.

11. Company agrees to immediately notify Transporter upon temporary or

permanent cessation of gas flow into Transporter at an Interconnect

Point or upon acquisition of a new Interconnect Point, and the

Parties agree to timely amend this Agreement to delete or add such

Interconnect Points as may be appropriate, by revising Exhibit 1

hereto.

12. Any new Interconnect Points between Transporter and Company shall be

added to this Agreement prior to the commencement of any gas flow, or

shall otherwise be deemed to have been added to this Agreement upon

any gas flow.

13. This Agreement shall become effective on the first day of the month

following execution by both Parties and the in-service date of the

facilities to be constructed, if any, and shall continue for a

primary term of one (1) month from the effective date and month to

month thereafter; provided, however, either Party may terminate this

Agreement at the end of the primary term, or thereafter by providing

thirty (30) days prior written notice to the other Party.

14. Notwithstanding the termination of this Agreement, the Parties agree

to reconcile and eliminate any remaining Operational Imbalance

pursuant to the terms and conditions of this Agreement within ninety

(90) days of termination of this Agreement or such other period of

time which is mutually agreed to by the Parties.