Southern Natural Gas Company

Original Volume No. 2

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

First Sub. Sixteenth Rev. Sheet No. 470 First Sub. Sixteenth Rev. Sheet No. 470 : Effective

Superseding: Fifteenth Revised Sheet No. 470

RATE SCHEDULE X-50 (Continued)

2. The gas to be redelivered by Southern to United hereunder shall be

delivered and received at the maximum pressure available from time to time in

Southern's pipeline facilities at the Point of Redelivery; it being understood

and agreed that United shall have the right but not an obligation, at its sole

cost and expense, to install and operate any compression facilities required to

effect receipt of such gas at the point of Redelivery.

ARTICLE VI

(Transportation Service Charges, Taxes)

1. Commencing with the effective date hereof and unless and until changed

as hereinafter provided in this Article VI, United agrees to pay to Southern

for the service and transportation provided hereunder Nineteen and Nine-tenths

(19.9) cents for each MMBTU delivered by Southern at the Point of Redelivery.

2. The charges hereinabove provided shall be subject to increase or

decrease pursuant to any Order issued by the Federal Energy Regulatory

Commission (the FERC), or any other governmental agency having jurisdiction, in

any rate proceeding initiated by, or applicable to, Southern. United agrees

that Southern shall, at all times during the term hereof, have the right to

effect changes in such charges by seeking authorization from duly constituted

regulatory authorities for any such adjustments as may be needed to assure

Southern that it will receive just and reasonable compensation for the services

performed hereunder for United. Nothing herein contained shall prejudice the

rights of United to contest at any time changes to the charges set forth above

with regard to the services rendered hereunder by Southern.

3. In addition to the amounts otherwise due pursuant to this Article VI,

United shall pay or reimburse Southern for the full amount of any present or

future tax or assessment levied upon Southern with respect to the receipt,

transportation and redelivery of gas for United hereunder to the extent such

taxes are not included in the rates provided in Article VI., excluding,

however, ad valorem or similar taxes now or hereafter levied upon the physical

facilities of Southern utilized to receive, transport and redeliver gas for

United as herein provided.

ARTICLE VII

(Term)

1. This Agreement shall be in full force and effect as of the date first

hereinabove written, and subject to Paragraph 3., Article XV., hereof, shall

remain in full force and effect for a primary term of ten (10) years.

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, of Southern's FERC Gas

Tariff, Sixth Revised Volume Number 1.