Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 12/31/9999, Docket: RP07-330-000, Status: Accepted

Third Revised Sheet No. 432 Third Revised Sheet No. 432 : Pending

Superseding: Second Revised Sheet No. 432

POWERPAK ADDENDUM

TO

(TF/TFX/TI) THROUGHPUT SERVICE AGREEMENT

Related Throughput Service Agreement, Contract No. ___________

Related Deferred Delivery Service Agreement, Contract No._________

[when applicable] Transaction No.:____________

Term: __________________

Unit Rate: ______________DTH. All rates will be set forth in the applicable service

agreements for the term of the PowerPak option. The unit rate includes any applicable Annual

Charge Adjustment. In addition, Shipper shall provide fuel use and unaccounted for in

accordance with Northern's FERC Gas Tariff.

[If applicable] In order to receive the rate stated above, Shipper shall (i) deliver volumes

on its Related Throughput Service Agreement from the receipt point(s) to the delivery

point(s) listed in the Related Deferred Delivery Service Agreement, (ii) withdraw volumes on

its Related Deferred Delivery Service Agreement, and (iii) transport the same volumes on its

Related Throughput Service Agreement to the delivery point(s).

All other terms and conditions of the respective service agreements are applicable.

Northern Natural Gas Company Shipper

By:_______________________________ By:________________________________

Title:_____________________________ Title:______________________________

Date:______________________________ Date:_______________________________