Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 05/11/2009, Docket: RP09-506-000, Status: Effective

Tenth Revised Sheet No. 608A Tenth Revised Sheet No. 608A

Superseding: Ninth Revised Sheet No. 608A

FORM OF TRANSPORTATION SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE IT-1 (Continued)

EXHIBIT "A"

4/ Unless discounted by Transporter pursuant to Section 3.3 of Rate

Schedule IT-1 and Subsection 7.9 of the General Terms of Conditions of

Transporter's FERC Gas Tariff, Second Revised Volume No. 1, the

applicable rate for service hereunder is the effective maximum rate for

Rate Schedule IT-1 service on file with the FERC, as same may change

from time to time. Such rates shall not be applicable to service

provided pursuant to Section 51 of the General Terms and Conditions of

this Tariff. Should Transporter and Shipper negotiate a specific

discount rate, such downward price adjustment shall be for a specific

term and shall apply only if one or more of the following instances

occur: (1) specified volumes under such Service Agreement are achieved;

(2) during specified periods of the year or for a specifically defined

period; and/or (3) to specified receipt/delivery points, subsystem(s)

and/or other defined geographical area(s). A discount agreement which

provides for an agreed discount as to a specified volume will not be

invalidated if the Shipper transports an incremental volume above that

specified volume. Such incremental volume will be priced at a mutually

agreeable price between Transporter and Shipper. The commodity rate

determined hereunder includes ACA and throughput surcharges.

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

contract.

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