Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 10/01/2005, Docket: RP05-616-000, Status: Effective

First Revised Sheet No. 476 First Revised Sheet No. 476 : Effective

Superseding: Original Sheet No. 476

NORTHERN BORDER PIPELINE COMPANY

OPERATIONAL BALANCING AGREEMENT

(For Use at Point(s) of Interconnection)

4. a. The actual measured quantity of gas at the Point(s) of

Interconnection each day shall be determined and communicated

by __________ (the "Measuring Party") by facsimile, electronic

interface system or in writing to the other OBA Parties in

accordance with NAESB Standard 2.3.7, or as mutually agreed.

The actual measured quantity shall be determined pursuant to

the applicable provisions of the Measuring Party's Tariff or

applicable measurement procedures.

b. Operational Imbalances shall be corrected in a manner mutually

agreed to within such period of time as is mutually agreed to

by the OBA Parties. Company has the right to issue an

Operational Flow Order at the Point(s) of Interconnection

pursuant to the terms and conditions of its FERC Gas Tariff.

5. In the event that a capacity constraint occurs on either OBA Party's

system which results in curtailment of quantities through the

Point(s) of Interconnection, the OBA Party on whose system the

constraint has occurred shall determine the confirmation of

quantities to the Service Requester(s) under the affected Service

Requester Agreements. Such change in Scheduled Quantities shall be

confirmed as required by Paragraph (1) above. In the event that the

location of the restriction is not clear, if the delivery pressure

at the interconnect is equal to or greater than the delivery

pressure commitments of Company, then __________ shall be deemed to

be restricted, otherwise, Company shall be deemed to be restricted.

6. This Agreement is entered into in order to facilitate operations

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

upon the Service Requester Agreements or upon the effectiveness of

any OBA Party's Federal Energy Regulatory Commission (FERC) Gas

Tariff.