Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 06/11/2007, Docket: RP07-446-000, Status: Effective

Third Revised Sheet No. 130 Third Revised Sheet No. 130 : Effective

Superseding: Second Revised Sheet No. 130

RATE SCHEDULE TI

Interruptible Throughput Service

6. RATES AND CHARGES.

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The monthly billing for TI Throughput Service(s) shall be the sum of:

(a) Throughput Commodity Charge

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The total units of TI volumes scheduled during the respective

month multiplied by the Commodity Rate for each TI unit

transported as shown on Sheet No. 52 of this Tariff.

(b) Overrun and Out-of-Balance Charges

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(i) Overrun Charge. For Overrun Volumes transported, the

monthly billing shall be the sum of said overrun units

transported multiplied by the daily Overrun Rate shown on

Sheet No. 53.

(ii) Out-of Balance Charge. The monthly billing shall be the

total units of Out-of-Balance Volumes transported to a

delivery point(s) during the respective month multiplied by

the Out-of-Balance Rate as shown on Sheet No. 52 of this

Tariff, as applicable.

(c) MOPS Gathering

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If Shipper's throughput is scheduled from a receipt point(s)

identified as a gathering receipt point then, in addition to the

MOPS TI commodity charges shown on Sheet No. 52, Shipper shall

pay the MOPS Gathering commodity charges shown on Sheet No. 52,

which shall be the product of the MOPS Gathering TI commodity

rate multiplied by the throughput from the gathering receipt

point for the billing month.