Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 09/03/2004, Docket: RP04-441-000, Status: Effective

Original Sheet No. 475 Original Sheet No. 475 : Effective

NORTHERN BORDER PIPELINE COMPANY

OPERATIONAL BALANCING AGREEMENT

(For Use at Point(s) of Interconnection)

NOW, THEREFORE, in consideration of the premises and mutual covenants

contained herein, the OBA Parties agree as follows:

1. Prior to the date and time of flow at each Point(s) of

Interconnection, the OBA Parties shall confirm and schedule

nominations which will be delivered or received at each Point(s)

of Interconnection. The reconciliation and confirmation between

the OBA Parties shall be made in writing, unless otherwise

mutually agreed to by the OBA Parties. A summary of the total

confirmed nominations must be completed and signed by both OBA

Parties as soon as practical after the flow month's end.

2. The OBA Parties intend that the quantity of gas actually delivered

and received each day at each Point(s) of Interconnection will

equal the Scheduled Quantities for that point. Each OBA Party

will allocate quantities which are to be delivered and received at

each Point(s) of Interconnection among the Service Requester

Agreements on its system pursuant to the Scheduled Quantities at

such Point(s) of Interconnections. Any imbalance created, when

the actual physical flow is different than the Scheduled

Quantities, will be the "Operational Imbalance" which will be the

responsibility of the OBA Parties to eliminate pursuant to this

Agreement.

3. Estimated operating quantities flowing at each Point(s) of

Interconnection shall be used on an ongoing basis during any day

to determine the forecast Operational Imbalance at such Point(s)

of Interconnection and for that day, with physical flow

adjustments to be made during that current day as mutually agreed

to by both OBA Parties to attempt to maintain or achieve an

Operational Imbalance of zero at each Point(s) of Interconnection.