Midwest Gas Storage, Inc.

First Revised Volume No. 1

Effective Date: 05/15/1994, Docket: CP90-454-004, Status: Effective

Original Sheet No. 531 Original Sheet No. 531 : Effective

Midwest's TBB will provide callers with a menu of recorded

messages regarding various items referenced in Midwest's tariff.

These items include: (i) information regarding unsubscribed

capacity available on Midwest's system; (ii) information

regarding released capacity available from firm shippers (if

any); (iii) information regarding service interruptions due to

force majeure and related capacity constraints; and (iv) other

operating conditions or restrictions, and (v) FERC Form No. 592

affiliate transportation log and other Order No. 497-related

information, and (vi) emergency contacts.

Midwest will add other options as required. In addition,

Midwest will update its TBB as needed, but in no event less than

once every business day.

15. ORDER NO. 497 COMPLIANCE

15.1 Shared Operating Personnel and Facilities: Midwest will

have an organizationally-distinct marketing affiliate whose

operating personnel and facilities are separated, to the

maximum extent practicable, from those of Midwest. Midwest

shares no operating personnel with its marketing affiliate.

With respect to shared facilities, Midwest and its

marketing affiliate are located in the same office building

at 10 South Riverside, Chicago, Illinois; however, they are

physically segregated in separate suites, and Midwest and

its marketing affiliate have separate and completely

independent computer systems. The personnel of Midwest's

marketing affiliate do not have access to Midwest's storage

service data bases.

15.2 Information Required for Valid Request for Service: The

specific information and format required from those persons

seeking to obtain service under Rate Schedules FSS or ISS

is set forth in Section 2 of these General Terms and

Conditions.