Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 12/31/9999, Docket: RP00-404-007, Status: Accepted

Original Sheet No. 305A Original Sheet No. 305A : Pending

B. FIELD AREA -

A Shipper utilizing firm transportation service under TF and TFX Rate Schedules

included in Northern's F.E.R.C. Gas Tariff may request, subject to the

limitations set forth below, to segment its Field Area contractual firm

entitlement, excluding receipt and delivery points located in the Bushton

Universe. For this Section 56, the Bushton Universe is defined as all receipts

of gas that can physically flow through the Bushton Plant and all delivery

points located on the pipeline that are physically upstream of the Bushton

Plant. Such gas is subject to processing either pursuant to individual

processing agreements or Northern's Strangers' Gas Processing Agreement as

provided in Section 44 of the GENERAL TERMS AND CONDITIONS. Segmentation

requests must be made no less than 20 days prior to the day on which Shipper

desires the segmentation to be effective. Provided, however, Northern shall use

reasonable efforts to accommodate Shipper if a request for segmentation is made

less than 20 days before the desired effective date.

1. Northern shall grant Field Area segmentation requests if the criteria listed

below are met. If the Field Area segmentation request involves the release

of capacity, the requirements of Section 47 of the GENERAL TERMS AND

CONDITIONS of this Tariff must be satisfied.

2. General Criteria for Segmentation in Northern's Field Area. To maintain the

integrity and reliability of Northern's operationally complex Field Area

transmission system, the following criteria for segmentation have been

established to ensure that segmentation is provided to the greatest extent

possible without detriment to, or degradation of, any Shipper's service.

a. At a minimum, the point of receipt or the point of delivery

on each segmented contract must be the same as Shipper's primary

receipt or primary delivery point on its currently effective service

agreement.

b. Field Area segmentation capacity shall be limited to the available MDQ

in the Shipper's service agreement.

c. Segmented points must be physical points on Northern's system

(i.e., pooling points cannot be segmented).

d. Segmentation is permitted in any direction of flow; however,

segmentation requests for flow that is opposite to the primary

receipt-to-delivery contract path must first request to realign the

existing primary receipt and delivery point to provide for the change

in direction of flow.

e. Segmentation is subject to the availability of capacity and existing

contractual obligations, including those relying on displacement of

capacity, at and between the new points of receipt and/or delivery

established as a result of segmentation.

f. The thermal content of Field Area segmented points must be no less than

the thermal content of gas received at the primary points(s) of receipt

under the Shipper's Throughput Service Agreement for segments

downstream of the Bushton Plant.