Enbriidge Pipelines (Midla) L. L. C.

Third Revised Volume No. 2

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Effective Date: 10/11/2002, Docket: RP03- 39-000, Status: Effective

Original Sheet No. 67 Original Sheet No. 67 : Effective

RATE SCHEDULE X-7

EXCHANGE OF NATURAL GAS

TRANSCONTINENTAL GAS PIPE LINE CORPORATION

November 9, 1973

Transcontinental Gas Pipe Line Corporation

P.O. Box 1396

Houston, Texas 77001

Gentlemen:

Enbridge Pipelines (Midla), L.L.C. (formerly known as Mid Louisiana) has

asked for Transco's assistance in taking into its system natural gas available

to Enbridge Pipelines (Midla), L.L.C. (formerly known as Mid Louisiana) in the

Lafourche Crossing Field, Lafourche Parish, Louisiana. You have agreed to

provide such assistance on the following terms and conditions:

Enbridge Pipelines (Midla), L.L.C. (formerly known as Mid Louisiana)

will deliver or cause to be delivered to Transco at a mutually agreeable point

in the Lafourche Crossing Field, Lafourche Parish, Louisiana up to 1,500 MCF

per day. Transco will return substantially contemporaneously therewith,

equivalent volumes of gas at any mutually agreeable authorized exchange point

between the two companies. The exchange natural gas delivered by either party

will be pipeline quality gas and be at the pressure existing in the line of

the party making delivery. Enbridge Pipelines (Midla), L.L.C. (formerly known

as Mid Louisiana) or its representative will be responsible for measurement at

the Lafourche Crossing point of delivery.

All gas delivered under terms of this agreement shall be measured at a

base pressure of 14.73 pounds per square inch and at a base temperature of

sixty (60) degrees Fahrenheit, using an orifice meter installed and operated

according to A.G.A. Gas Measurement Report No. 3. The volume of gas delivered

shall be computed in accordance with provisions of A.G.A. Gas Measurement

Committee Report No. 3, as amended from time to time.

In the computation of gas volumes, the average atmospheric pressure

shall be assumed to be 14.7 pounds per square inch, and adjustments for the

flowing temperature shall be applied for each 24-hour period of gas delivery,

such flowing temperature to be obtained from a recording thermometer

installed in