MarkWest Pioneer, L.L.C.

Original Volume No. 1

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Effective Date: 04/01/2009, Docket: RP09-321-000, Status: Effective

Original Sheet No. 65 Original Sheet No. 65







10.1. Transporter shall have the right to curtail or discontinue services, in

whole or in part, on all or a portion of its System at any time for reasons

of Force Majeure or when capacity or operating conditions so require.

Transporter shall provide Shipper such notice of such curtailment as is

reasonable under the circumstances.


10.2. If for any reason Transporter is unable on any day to deliver all of the

quantities of Gas scheduled, service shall be curtailed in the following

order of priority from first curtailed to last curtailed:


10.2.1. First, services for AOS under Rate Schedules FT-1 and FT-2 and

services under Rate Schedule IT curtailed by price from lowest to

highest; provided that curtailment will be pro rata based on

scheduled quantities among Shippers paying the same rate; and

provided further that for purposes, of curtailment under this

section, Negotiated Rates that exceed the maximum Recourse Rate will

be treated as though equal to the maximum Recourse Rate.


10.2.2. Second, services within Shippers’ MDQs from Primary and Secondary

Receipt Points or Primary and Secondary Delivery Points under Rate

Schedules FT-1 and FT-2, curtailed pro rata based on scheduled