Colorado Interstate Gas Company

First Revised Volume No. 1

Effective Date: 06/01/2010, Docket: RP10-689-000, Status: Effective

Fifth Revised Sheet No. 162 Fifth Revised Sheet No. 162

Superseding: Fourth Revised Sheet No. 162

RATE SCHEDULE IS-1

STORAGE SERVICE - INTERRUPTIBLE

1. AVAILABILITY

1.1 This Rate Schedule is available to any Party (hereinafter referred

to as "Shipper") for the storage of natural Gas by Colorado

Interstate Gas Company (hereinafter referred to as "Transporter"),

subject to available capacity, when Shipper desires interruptible

Storage Service, and:

(a) Shipper has made a Request for Interruptible Storage Service

pursuant to the provisions set forth in Section 4 of the

General Terms and Conditions;

(b) Shipper and Transporter have executed a Storage Service

Agreement - Interruptible (Agreement) pursuant to the terms of

this Rate Schedule;

Transporter or (2) made arrangements with a third Party on

third Party facilities for (a) transportation of Gas to

Transporter's storage facilities for injection, and/or (b)

receipt of Gas from Transporter's storage facilities upon

Withdrawal; and

(d) Shipper has met the service requirements specified in Section 4

of the General Terms and Conditions, including the

creditworthiness conditions specified in Section 4.14 of the

General Terms and Conditions.

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1 This Rate Schedule IS-1 shall apply to storage service rendered by

Transporter to Shipper on a completely interruptible basis subject

to the limitations set forth in the Agreement, this Rate Schedule

IS-1, and the General Terms and Conditions.

2.2 Storage Service hereunder is interruptible and subject to

interruption at any time and such interruptions may be in effect

for extended periods of time. Storage Service under this Rate

Schedule will be performed when in Transporter's sole judgment

Transporter has capacity available to provide such storage without

detriment or disadvantage to Transporter's firm obligations.