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Columbia Gas Transmission, LLC
FERC Gas Tariff
Third Revised Volume No. 1

First Revised Sheet No. 116
Superseding
Original Sheet No. 116

                                               OPT RATE SCHEDULE
                                   OFF-PEAK FIRM TRANSPORTATION SERVICE (Cont'd)

        (e)      Transporter shall not be obligated on any Day to accept gas in excess of the lesser of (i) 
 Shipper's Transportation Demand plus Retainage, or (ii) Shipper's Scheduled Daily Receipt Quantity.  
 Transporter also shall not be obligated on any Day to deliver more gas to Shipper than the lesser of 
 (i) Shipper's Transportation Demand, (ii) Shipper's Scheduled Daily Delivery Quantity or (iii) the quantity of 
 gas Transporter receives for Shipper less Retainage.  For the purpose of balancing any imbalances in Shipper's 
 account, Shipper may deliver or take quantities in excess of the above limitations in accordance with the 
 provisions of Section 6 (Nominating, Scheduling, and Monitoring) and Section 7 (Capacity Allocation) of the 
 General Terms and Conditions. 

        (f)      Service rights under an OPT Service Agreement may be released and assigned in accordance with 
 Section 14 (Release and Assignment of Service Rights) of the General Terms and Conditions.  Service to a 
 replacement shipper under any such release and assignment shall be subject to the provisions set forth in this 
 Rate Schedule and in the applicable General Terms and Conditions.

3.      OPERATING CONDITIONS

        (a)      Service under this Rate Schedule is subject to the operating conditions set forth in this 
 Section and in applicable provisions of the General Terms and Conditions.

        (b)      Transporter in its reasonable discretion may interrupt service to Shippers under this Rate 
 Schedule, consecutively or nonconsecutively, up to the number of days (30 or 60) provided in Shipper's OPT 
 Service Agreement with Transporter.  Based on forecasted system conditions, Transporter will post a notice at 
 least 24 hours prior to the start of the Gas Day informing shippers of the anticipated availability of service 
 under this Rate Schedule.  If, based on forecasted system conditions, OPT is listed as "unavailable" in the 
 advance notice, Shippers will still be permitted, but will not be required, to submit nominations for service 
 and days of allowable interruption will be calculated as set forth in Section 3(d), below.  If shippers elect 
 not to submit a nomination for service under Rate Schedule OPT, services with a lower scheduling priority may 
 be scheduled to the extent capacity is available.

        (c)      In allocating such interruptions among those Shippers receiving service on the portion of 
 Transporter's system in which interruptions are to be made, Transporter shall (i) interrupt service to those 
 Shippers having the greatest number of days of allowable interruption remaining during that November 1 - March 
 31 period, and (ii) among those Shippers with an equal number of remaining days of allowable interruption, on 
 a pro rata basis.  Alternatively, Transporter shall interrupt service in accordance with an alternate 
 allocation methodology if, before issuance of any notices of interruptions, such methodology has been agreed 
 to in writing by Transporter and all Shippers whose service would be affected.  If weather or other 
 circumstances beyond Transporter's control mandate interruptions at delivery points for more than the number 
 of days specified in Shipper's Service Agreement, service under this Rate Schedule shall be interrupted before 
 service under other firm Rate Schedules and the provisions of paragraph (f) below shall apply.

        (d)      For purposes of calculating periods of allowable interruption under this Rate Schedule an 
 interruption at a secondary delivery point shall not reduce Shipper's number of remaining days available for 
 interruption.  An interruption at a primary delivery point shall constitute an interruption for purposes of 
 this Rate Schedule whenever Transporter notifies Shipper twenty-four (24) hours in advance of the Gas Day that 
 Transporter will be unable to render service up to the level of Transportation Demand specified in the OPT 
 Service Agreement.  Days of interruption at primary delivery points shall be calculated as follows:  

Issued by: Claire A. Burum, SVP Regulatory Affairs
Issued on: March 11, 2009                     Effective on: April 10, 2009
Filed to comply with order of the Federal Energy Regulatory Commission, Docket 
No. RP09-289-000, issued February 24, 2009, 26 FERC ¶ 61,168
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