Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 09/01/2010, Docket: RP10-1139-000, Status: Effective

First Revised Sheet No. 66B.39 First Revised Sheet No. 66B.39

Superseding: Original Sheet No. 66B.39

99/ For the period 04/01/2010 through 10/31/2010:

Contract Total Quantity (CTQ) - 1,000,000 Dth

Daily Minimum Injection - 0 Dth

Daily Maximum Injection - 50,000 Dth

Daily Minimum Withdrawal - 0 Dth

Daily Maximum Withdrawal - 50,000 Dth

Minimum Inventory - (125,000) Dth

Maximum Inventory - 125,000 Dth

Monthly Minimum Injection - 0 Dth

Monthly Maximum Injection - 750,000 Dth

Monthly Minimum Withdrawal - 0 Dth

Monthly Maximum Withdrawal - 750,000 Dth

The Total Transaction Rate charged shall be as follows:

Injection Charge: $0.0149

Withdrawal Charge: $0.0149

Total Monthly Inventory Charges: $0.0887

Capacity Fee: $0.0500

Annual Rollover Charge: $0.0000

Total Transaction Rate: $0.1685

Notwithstanding the above, Shipper will be charged the Capacity Fee (CAP)/Dth as reflected

above at a point level on the absolute inventory balance(s) any time a positive or negative

balance(s) is created in Shipper's account. In addition, Shipper will be charged the

CAP/Dth as reflected above at a point level on the absolute beginning month inventory

balance(s). The total cost commitment of this Agreement is equal to $0.00.

The CTQ may be used at any storage point listed on Sheet No. 142C of Northern's FERC Gas

Tariff.