Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 11/01/2006, Docket: RP06-620-000, Status: Effective

12 Revised Sheet No. 55 12 Revised Sheet No. 55 : Effective

Superseding: 10 Revised Sheet No. 55

R A T E S C H E D U L E S F D D, P D D , I D D & S M S

Rate Schedule FDD

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Maximum Reservation Fee 1.7140 1/

Maximum Capacity Fee 0.3567 1/

Injection Charge - Firm 0.0149

Withdrawal Charge - Firm 0.0149

Annual Rollover Fee 0.3567 1/

Rate Schedule PDD

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Maximum Capacity Fee 0.3567 1/

Maximum Monthly Inventory Charge 0.0887 1/

Injection Charge 0.0149

Withdrawal Charge 0.0149

Annual Rollover Fee 0.3567 1/

Rate Schedule IDD

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Maximum Monthly Inventory Charge 0.0887 1/

Injection Charge 0.0149

Withdrawal Charge 0.0149

Annual Rollover Fee 0.3567 1/

Rate Schedule SMS

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Reservation Fee 2.1800

Commodity Rate 0.0208

1/ Minimum Rate is zero.