Northern Natural Gas Company

Fifth Revised Volume No. 1

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

35 Revised Sheet No. 54 35 Revised Sheet No. 54

Superseding: 34 Revised Sheet No. 54

R A T E S C H E D U L E S T F, T F X, L F T, G S - T, T I, & F D D

Fuel Percentages/Electric Compression Rates

Percentages

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FUEL PERCENTAGES: 1/

Market Area (including Out-of-Balance) 0.43%

Field Area 2/ 3/ 5/ 6/

UNACCOUNTED FOR PERCENTAGE (including Out-of-Balance) -0.16% 4/ 5/

FDD Storage Fuel 1.63%

Electric Compression

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COMMODITY RATES: 1/

Market Area $0.0006

Field Area $0.0000

1/ Northern will adjust its Fuel percentages and electric compression commodity rates in

accordance with Sections 53A and 53B, respectively, of the General Terms and Conditions

of this Tariff.

2/ Fuel shall be determined by Mileage Indicator Districts (MIDS) for the Field

Area.

3/ Fuel charged in the Field and Market Areas for a pooling transaction or for processing

plant transactions will not exceed the fuel charged on a unified Field-to-Market

transaction having the same initial Field receipt point and ultimate Market delivery

point, i.e., the total fuel collected for transactions that go into and out of pooling

points or processing plants in either the Field Area or the Market Area will be no

greater than the fuel collected on the total path between the original receipt point and

the ultimate delivery point, subject to the shipper(s) providing Northern the

requisite information.

4/ The Unaccounted For percentage utilizes the most recent twelve-month period ending

December 31, 2009. For deliveries subject only to UAF, the UAF rate is zero; provided,

however, Northern will issue a volume credit on the Shipper's monthly imbalance statement

equivalent to -0.16% for the period April 2010 through March 2011 for such deliveries.

5/ Sheet No. 54A identifies the specific transportation transactions exempt from fuel and

unaccounted-for retention charges.

6/ The Out-of-Balance Fuel Percentage for deliveries in MIDS 1-7 shall be the applicable

Section 1 Mainline Fuel percentage, and for deliveries in MIDS 8-16B shall be the

applicable Section 2 Mainline Fuel percentage.

In the event facilities have been abandoned, Northern shall have the right to file to reduce

the applicable MID fuel percentage(s) on a common basis for all transactions affected by the

abandonment to reflect the reduction in use for the remainder of the PRA period. In the event

such abandoned facilities (gas compressors) have been replaced with electric compressors

installed after October 1, 1998, and Northern reduces the applicable MID fuel percentages,

Northern has the right to file to increase the applicable electric compression commodity rate.