Northern Natural Gas Company

Fifth Revised Volume No. 1

Effective Date: 04/01/2010, Docket: RP10-354-000, Status: Pending

43 Revised Sheet No. 52 43 Revised Sheet No. 52

Superseding: 42 Revised Sheet No. 52

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

Field Mileage Carlton

COMMODITY RATES 1/ Market Area 2/ Rate per 100 miles 3/ Surcharge 4/ Out-of-Balance 2/

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

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

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

NOVEMBER - MARCH

Market Market 0.6106 0.0215 0.0175 0.0000 0.6106 0.0215

Field Market 0.6106 0.0215 0.1588 0.0040 0.0175 0.0000

Market Field 0.1588 0.0040

Field Field 0.1588 0.0040 0.3608 0.0109

APRIL - OCTOBER

Market Market 0.2527 0.0215 0.0000 0.0000 0.2527 0.0215

Field Market 0.2527 0.0215 0.0893 0.0040 0.0000 0.0000

Market Field 0.0893 0.0040

Field Field 0.0893 0.0040 0.2037 0.0109

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Commodity 5/ Out-of-Balance 5/

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GULF COAST Maximum Minimum Maximum Minimum

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

MOPS Gathering 0.0365 0.0019 0.0365 0.0019

MOPS Transmission 0.0523 0.0019 0.0523 0.0019

Tivoli - Downstream 0.0244 0.0019 0.0244 0.0019

Other Gulf Coast 0.1603 0.0019 0.1603 0.0019

1/ The applicable Mileage Indicator Districts (MIDs) billing rate will be added to the TI 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.

2/ Maximum rates include ACA of $0.0019 and Market Area Electric Compression charge of $0.0006 where

applicable. Minimum rates include ACA of $0.0019 and Electric Compression charge of $0.0006.

3/ Where applicable, Field Area Compression charge of $0.0000 and ACA will be added to the mileage based

rates.

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

dated October 28, 1996.

5/ Maximum and Minimum rates include ACA of $0.0019.