Colorado Interstate Gas Company

First Revised Volume No. 1

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

Fourth Revised Sheet No. 164A Fourth Revised Sheet No. 164A

Superseding: Third Revised Sheet No. 164A

RATE SCHEDULE IS-Y

YOUNG STORAGE SERVICE - INTERRUPTIBLE

(Continued)

(b) Rate(s) shall be adjusted effective the first of the Month, the

Month following the date when a new currently effective Average

Thermal Content of Gas in Storage is posted on Transporter's

electronic bulletin board as provided in Section 1.2 of the

General Terms and Conditions of this Tariff. Such adjustment

shall be made by multiplying the fraction [(1,000) over (new

currently effective ATC in Btu)] times Shipper's rates as

listed in the Agreement.

4. FUEL REIMBURSEMENT

4.1 Shipper shall furnish to Transporter the Fuel Reimbursement as

defined in Section 1 of the General Terms and Conditions. Quantities

of Gas Tendered under this Rate Schedule shall be adjusted for Fuel

Reimbursement attributed to Storage Service.

Retention of Fuel Reimbursement quantities is based on High Plains

Storage Injection quantities.