Northern Natural Gas Company

Fifth Revised Volume No. 1

Effective Date: 10/01/2009, Docket: RP09-948-000, Status: Effective

78 Revised Sheet No. 50 78 Revised Sheet No. 50

Superseding: 77 Revised Sheet No. 50

R A T E S C H E D U L E T F

FIELD-TO-

FIELD/MARKET

MARKET-TO-MARKET DEMARCATION

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TF12

RESERVATION RATES TF12 Base Variable TF5 TFF

------------------------------- --------- --------- --------- ---------

Base Tariff Rates 1/

Summer (Apr-Oct) 5.683 5.683 -0- 5.473

Winter (Nov-Mar) 10.230 13.866 15.153 9.853

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COMMODITY RATES 2/ Field Mileage 5/ Carlton

TF12 Base, TF12 Var., TF5 & TFF Market Area 3/ Rate per 100 miles Surcharge 4/ Out-of Balance 3/

------------------------------- ------------------- ------------------- ----------------- ----------------

Receipt Point Delivery Point Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum

------------- -------------- --------- --------- --------- --------- -------- -------- ------- --------

Market Market 0.0381 0.0212 0.0175 0.0000 0.0381 0.0212

Field Market 0.0381 0.0212 0.0122 0.0040 0.0175 0.0000

Market Field 0.0122 0.0040

Field Field 0.0122 0.0040 0.0295 0.0109

1/ The minimum reservation rate is equal to zero.

2/ The applicable Mileage Indicator Districts (MIDs) billing rate will be added to the TF rates for volumes

received in the Field Area, or received in the Market Area and delivered to the Field Area. The MIDs

rates shown on Sheet Nos. 59-60A represent the total maximum Field Area throughput commodity rates for

any transaction involving MIDs.

3/ Maximum and Minimum rates include ACA of $0.0019 and the Market Area Electric Compression charge of

$0.0003 where applicable.

4/ Applicable to Market Area shippers as provided for in the Carlton Settlement filed in Docket No. RP96-347

dated October 28, 1996.

5/ Where Applicable, Field Area Electric Compression charge of $0.0000 and ACA will be added to the mileage

based rates.