Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 06/01/2008, Docket: RP08-307-000, Status: Effective

Fourth Revised Sheet No. 134 Fourth Revised Sheet No. 134 : Pending

Superseding: Third Revised Sheet No. 134

RATE SCHEDULE FDD

Firm Deferred Delivery Service

1. AVAILABILITY

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This Rate Schedule is available to any Shipper, subject to availability

of deferred delivery, or storage capacity, as determined by

Northern, with an effective Firm Deferred Delivery Service

Agreement FDD (Service Agreement) with Northern in the form included

in this Tariff prior to commencement of service under this Rate Schedule.

A. Definitions of Terms

Account Balance - is the inventory balance at any time held for the

Shipper, not to exceed the Shipper's firm storage quantity.

Cycle Year - the annual period beginning June 1 and ending the

following May 31.

Firm Storage Quantity (FSQ) - the maximum FDD Account Balance

provided for in the Service Agreement. This number is the individual

FDD Shipper's contractual share of the total 59.3 Bcf of annual cycle

quantity available for FDD service under Section 2.A. of this Rate

Schedule.

Firm Daily Quantity (FDQ) - the Maximum Daily Injection quantity and

the Maximum Daily Withdrawal quantity provided for in the Service

Agreement for the Shipper. These numbers are the individual FDD

Shipper's shares of the total aggregate FDQs during the Injection and

Withdrawal Periods shown in Section 2. B. I., II. and III. of this

Rate Schedule.

Injection Period - the calendar months of June through October.

Withdrawal Period - the calendar months of November through May.