Northern Natural Gas Company

Fifth Revised Volume No. 1

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

80 Revised Sheet No. 51 80 Revised Sheet No. 51

Superseding: 79 Revised Sheet No. 51

R A T E S C H E D U L E S T F X a n d L F T

MARKET-TO-MARKET FIELD-TO-FIELD

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RESERVATION RATES Apr-Oct Nov-Mar Apr-Oct Nov-Mar

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Base Tariff Rates 1/ $5.683 $15.153 $5.473 $9.853

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COMMODITY RATES 2/ Field Mileage 5/ Carlton

TFX and LFT 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 0.0384 0.0215 0.0175 0.0000 0.0384 0.0215

Field Market 0.0384 0.0215 0.0122 0.0040 0.0175 0.0000

Market Field 0.0122 0.0040

Field Field 0.0122 0.0040 0.0295 0.0109

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Reservation 1/ Commodity 6/ Out-of-Balance 6/

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GULF COAST Maximum Minimum Maximum Minimum Maximum Minimum

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MOPS Gathering 1.0514 0.0000 0.0019 0.0019 0.0019 0.0019

MOPS Transmission 1.5337 0.0000 0.0019 0.0019 0.0019 0.0019

Tivoli - Downstream 0.6827 0.0000 0.0019 0.0019 0.0019 0.0019

Other Gulf Coast 4.8169 0.0000 0.0019 0.0019 0.0019 0.0019

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

$0.0006 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 Compression charge of $0.0000 and ACA will be added to the mileage based

rates.

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