Columbia Gas Transmission LLC

Third Revised Volume No. 1

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Effective Date: 03/03/2009, Docket: RP09-340-000, Status: Effective

Original Sheet No. 374 Original Sheet No. 374







The curtailment procedures set forth in this Section 32 are applicable to firm sales services

rendered by Transporter.


32.1 Seasonal Curtailment.


(a) If, in Transporter's reasonable judgment, its available gas supply will not be sufficient

during a Winter Season or a Summer Season, or any portion of either season, to deliver the aggregate of

Shippers' Annual Sales Quantity (ASQs), to satisfy Transporter's company-use and unaccounted-for gas

requirements, and, if necessary, to inject the required quantities of gas into its underground storage

fields to meet system requirements, then Transporter shall not deliver the ASQs of applicable Shippers,

and shall deliver gas in accordance with this Section 32 up to Shippers' ASQs. For purposes of this

Section 32, the ASQ shall mean the annual quantity of gas, as specified in the applicable firm sales

Service Agreement, that Transporter is obligated to sell and Shipper is entitled to purchase from

Transporter under any of Transporter's firm sales Rate Schedules. In such event, Transporter shall

curtail deliveries to applicable Shippers by giving Electonic Notice Delivery to each Shipper of the

Authorized Quantity that Shipper is entitled to receive during that season, or portion thereof. Said

notice shall be given as much in advance as reasonably possible under the circumstances. The procedure

for determining each Shipper's Authorized Quantity is set forth in Section 32.3 below.


(b) When Transporter is required to curtail sales as provided in Subsection (a) above,

curtailment shall be determined in accordance with Shippers' end-use profiles based upon the following

priorities of service, listed from highest to lowest priority:


Priority 1 - Residential uses, small commercial uses (less than 50 Dth on an average day in

the peak month) and other high-priority uses.


Priority 2 - Essential agricultural uses.


Priority 3(a) - Essential industrial process and feedstock uses as determined under Section 402

of the Natural Gas Policy Act of 1978 (NGPA).


Priority 3(b) - Feedstock and process gas uses not included in Priority 3(a).


Priority 4 - All uses not specified in Priorities 1, 2, 3 and 5.


Priority 5 - Large industrial boiler fuel and power generation uses (in excess of 300 Dth on

an average day in the peak month).


(c) All quantities of gas to be taken by Shipper for injection into underground storage

facilities under one or more of Transporter's firm storage rate schedules (including the GTS Rate

Schedule) and into its own or a third party's underground storage facilities during a Summer Season shall

be assigned priorities of service in accordance with Shipper's end-use profile for the preceding Winter



(d) Transporter shall fully curtail all lower priorities before commencing curtailment of a

higher priority.