Southern Natural Gas Company

Original Volume No. 2

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Effective Date: 02/03/1991, Docket: RP90-139-004, Status: Effective

First Sub. Seventh Rev. Sheet No. 845 First Sub. Seventh Rev. Sheet No. 845 : Effective

Superseding: Sixth Revised Sheet No. 845

RATE SCHEDULE X-73 (Continued)

(b) The Transportation Volume Transporter is obligated to transport and

deliver hereunder, and

(c) Those volumes of gas Transporter, or its affiliate, is obligated by

virtue of other contracts to transport through the same facilities

or a portion thereof, then such capacity shall be utilized to

transport gas owned by Transporter, or its affiliate, and the

Transportation Volume to be transported hereunder shall be reduced

to a pro rata share of all remaining gas available for transmission

by Transporter through such facilities.

ARTICLE IV

(Delivery Pressure)

4.1 Each Party agrees to deliver, or cause to be delivered volumes of gas at a

pressure sufficient to enter the receiving Party's pipeline against the

varying working pressures maintained in such pipeline at the applicable

points of receipt or redelivery from time to time.

ARTICLE V

(Rates)

5.1 The Party transporting the Transportation Volume, if any, shall be

entitled to receive the following transportation rates for such gas:

(a) Columbia will be entitled to receive from Southern 15.355›/Mcf (at

14.73 psia and 60 degrees Fahrenheit) for the Transportation Volume

received at the Columbia Gulf Points of Receipt.

(b) Southern shall be entitled to receive from Columbia Gas 22.0›/Mcf (at

14.73 psia and 60 degrees Fahrenheit) for the Transportation Volume

delivered by Southern to Columbia Gulf at the Southern Points of

Redelivery. 1/

5.2 The charges set out in Section 5.1 of this Article V shall be increased or

decreased pursuant to any rate proceeding. In addition, it is agreed that

any Party may seek authorization from duly constituted regulatory

authorities for adjustment of the rates determined hereunder or any

superseding rate existing from time to time hereunder in order to assure

just and reasonable rates for the services performed hereunder; provided,

however, that no such adjustment shall become effective hereunder until

made effective pursuant to the applicable rules and regulations of the

regulatory authority. Any Party

1/ Revised Charge: Winter 27.7› Summer 16.7›

Plus the ACA unit charge and the volumetric Take-or-Pay surcharge which

are set forth in Sections 21 and 22, respectively, or Southern's FERC Gas

Tariff, Sixth Revised Volume Number 1.