Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 04/01/2008, Docket: RP08- 20-000, Status: Effective

Third Revised Sheet No. 153 Third Revised Sheet No. 153 : Effective

Superseding: Second Revised Sheet No. 153

RATE SCHEDULE MPS

MID Pooling Service

1. AVAILABILITY:

This Rate Schedule MPS is available to any legal entity for the pooling of

natural gas within each Mileage Indicator District (MID) or group of MIDs,

for subsequent firm or interruptible throughput service by Northern Natural

Gas Company (Northern) under the following terms and conditions:

(a) the legal entity, or Pooling Customer, has executed a MID Pooling

Service Agreement (MPS Agreement) in the form contained in Northern's

FERC Gas Tariff; and

(b) the pooling service shall be subject to all of the terms and conditions

contained in this Rate Schedule and the GENERAL TERMS AND CONDITIONS

under this Tariff.

2. APPLICABILITY AND CHARACTER OF SERVICE:

Subject to the provisions of this Rate Schedule MPS and the GENERAL TERMS

AND CONDITIONS of this Tariff, service rendered under a MPS Agreement

shall consist of the following:

(a) Each MID is an individual pooling area with each MID pooling area

containing one paper pooling point which can serve as a pool for all of

the receipt points located within the same MID pooling area.

Also, the receipt points in certain MIDs may be aggregated across MIDs

and serve as a MID pooling area. The currently effective MID pools are

set forth in (j) below. Northern may eliminate an aggregate pool

effective any April 1 or November 1, after at least 2 months advance

notice given in the form of a Section 4 tariff filing.

(b) With the exceptions of Demarcation (POI 37654) and Demarcation Deferred

Delivery Point (POI 62389) in MID 16B being valid receipt points for

the MID 17 pooling area, a Pooling Customer can only bring receipts to

a pooling point from receipt points located within the same MID pooling

area.

(c) Each Pooling Customer shall be required to nominate in accordance with

Section 28 of the GENERAL TERMS AND CONDITIONS, receipts which will be

delivered into each pooling point. The daily quantities which are

nominated by the Pooling Customer from receipt point(s) for delivery

into the pool must equal the daily quantities which are nominated away

from the pool. A Pooling Customer on a daily basis will not be allowed

to net receipts between various pooling points in order to balance its

receipts and deliveries from a specific pooling point.

(d) A Pooling Customer shall be responsible for any imbalance which occurs

at the receipt point between actual allocated receipt quantities and

confirmed receipt nominations. For imbalance purposes, at the end of

each month, MPS imbalances at all pools may be netted with any

transportation contract imbalances incurred by the Pooling Customer and

any remaining imbalance will be subject to resolution pursuant to

Section 32 of the GENERAL TERMS AND CONDITIONS.

(e) A Pooling Customer shall be responsible for any receipt point

scheduling penalties which occur pursuant to Section 31 of the GENERAL

TERMS AND CONDITIONS.