Midwestern Gas Transmission Company

Third Revised Volume No. 1

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Effective Date: 12/16/2004, Docket: RP05- 72-000, Status: Effective

Third Revised Sheet No. 110 Third Revised Sheet No. 110 : Effective

Superseding: Second Revised Sheet No. 110

RATE SCHEDULE SA

SUPPLY AGGREGATION SERVICE

1. AVAILABILITY

This Rate Schedule is available for any Party (Aggregator) which has

(a) requested supply aggregation service by Company;

(b) met the conditions for qualification for receipt of service under Section 25 of

the General Terms and Conditions of Company's FERC Gas Tariff; and

(c) executed a Supply Aggregation Service Agreement with Company for service under

Rate Schedule SA pursuant to Section 25 of the General Terms and Conditions.

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1 This Rate Schedule permits Aggregator to aggregate quantities of gas, under any

of Company's transportation rate schedules, at a Supply Aggregation Point

(SA Point) pursuant to the terms and conditions set forth herein.

2.2 Nominated and confirmed receipts into an SA Point can be from any physical Receipt

Point(s), a different SA Point(s) other than the SA Point designated on Exhibit A

of the Supply Aggregation Service Agreement (SA Agreement), or from a Transfer

Point(s), all of which are located on Company's system.

2.3 Nominated and confirmed deliveries from the SA Point detailed on Exhibit A of

the SA Agreement can be to any physical Delivery Point(s), different SA

Point(s) other than the SA Point listed on Exhibit A of the SA Agreement, or to

a Transfer Point(s), all of which are located on Company's system.

2.4 In addition to designating the SA Point, a minimum of one physical point must be

designated under Point(s) on Exhibit A of the SA Agreement. To be eligible for

designation under Point(s) on Exhibit A of the SA Agreement, each Point must be a

physical point whose nominations are confirmed by Aggregator and are located

within the same Operational Impact Area on Company's system. Additionally, each

Point must have an associated agreement executed under Rate Schedule LMS-MA of

Company's Tariff. Aggregator also must provide to Company a pre-determined

ranking of deliveries at the Point(s) set forth on Exhibit A of the SA Agreement.

2.5 The SA Point shall be assigned a milepost number and DRN number on Company's

system. Company shall determine and post SA Point(s) and their respective

capacity on the system.

2.6 The quantity of gas measured at the SA Point for a given Gas Day shall be the

total of the actual metered quantities at the Point(s) set forth in Exhibit A

of the SA Agreement and shall be used to determine any operational imbalance at

the SA Point.

2.7 Any Shipper on Company's system shall not be precluded from nominating

quantities directly to the Point(s) listed on Exhibit A of the SA Agreement.

3. NOMINATIONS

3.1 Aggregator shall nominate quantities into and out of the relevant SA Point.

Aggregator shall be responsible for confirming nominations at the SA Point and at

the Point(s) identified on Exhibit A of the SA Agreement. Aggregator shall be

required to nominate quantities into the SA Point set forth on Exhibit A of the

SA Agreement. Aggregator also shall be required to nominate quantities from the

SA Point to any Delivery Point(s) not listed on Exhibit A. Any remaining

quantities shall be delivered to the Point(s) listed on Exhibit A of the

SA Agreement based upon the predetermined ranking(s) set forth on Exhibit A.

3.2 In addition to daily nomination rights and obligations as set forth in

Subsection 3.6 of the General Terms and Conditions, Aggregator shall have the

right to make intra-day and hourly nomination changes as provided in and subject

to the conditions set forth in Subsection 3.6 of the General Terms and Conditions.