Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 08/16/2010, Docket: RP10-976-000, Status: Effective

Fourth Revised Sheet No. 102 Fourth Revised Sheet No. 102

Superseding: Third Revised Sheet No. 102

RATE SCHEDULE TF

Firm Throughput Services

Flexibility. Shippers may request to amend their agreements to add,

change, or delete primary firm receipt points as limited by the firm throughput

service agreement as discussed above. Approval of such request will

be subject to capacity availability and operational considerations. All receipt points on

the system will be available for use as alternate firm receipt points within the area

provided by the contract and subject to operational considerations.

No geographical limitations will be placed on the availability of amended

receipt points within the service area provided by the contract.

Other than the discount provision below, there will be no reservation fee impact

if receipt points are moved solely within the Market Area or moved solely

within the Field Area.

Discounts. Any discount granted (reservation or commodity) at a primary receipt point

will not be automatically granted at an amended or alternate receipt point.

b) Receipt Point Allocation

Allocation of capacity is pursuant to Section 26 of the GENERAL TERMS AND CONDITIONS of

this Tariff.

Delivery Points

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a) Primary Firm Delivery Points.

(1) Flexibility. Shippers may request to amend their agreements to add,

change, or delete primary firm delivery points as limited by the firm throughput

service agreement as discussed on Sheet No. 101. Approval of such request will be

subject to capacity availability and operational considerations.

No geographical limitations will be placed on the availability of amended delivery

points within the service area provided by the contract.

Other than the discount provision below, there will be no reservation fee impact if

delivery points are moved solely within the Market Area or moved solely within the

Field Area.

(2) Discounts. Any discount granted (reservation or commodity) at a primary delivery

point will not be automatically granted at an amended or alternate delivery point.