Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 05/01/2003, Docket: RP03-323-000, Status: Effective

First Revised Sheet No. 658A First Revised Sheet No. 658A : Effective

Superseding: Original Sheet No. 658A

FORM OF SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE IS-1 (Continued)

EXHIBIT "A"

incremental volume above that specified volume. Such incremental volume

will be priced at a mutually agreeable price between Transporter and

Shipper.

2/ Unless otherwise noted, rates will be in effect for the term of the

contract.

WILLISTON BASIN

INTERSTATE PIPELINE COMPANY ____________________________

(Transporter) (Shipper)

By _____________________________ By _________________________

________________________________ ____________________________

(Print or type name) (Print or type name)

________________________________ ____________________________

(Print or type title) (Print or type title)

(The rest of this sheet has been intentionally left blank.)