MarkWest Pioneer, L.L.C.

Original Volume No. 1

 Contents / Previous / Next / Main Tariff Index



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

Original Sheet No. 69 Original Sheet No. 69







13.1. Responsibility for Balancing – Shippers are obligated to deliver and receive

Gas in conformance with their confirmed nominations. Transporter will enter

into an Operational Balancing Agreement (“OBA”) at all points of

interconnection between its system and the system of another interstate or

intrastate pipeline. Transporter may, but is not obligated to, enter into

an OBA to address imbalances at other points on its System. If an OBA is

not in place or the imbalance is beyond the terms of the OBA, Shippers are

responsible for conforming their takes at Delivery Points with their

deliveries to Transporter at Receipt Points each day. Transporter has no

obligation to deliver for the account of a Shipper more volumes of Gas than

Transporter has received for the account of the Shipper or to accept for the

account of the Shipper more volumes of Gas than are being delivered for the

account of the Shipper on any day.


13.2. Monthly Imbalances: Where Shipper has created a monthly imbalance on

Transporter’s pipeline that has not been eliminated through netting and

trading, Shipper shall pay Transporter a Monthly Imbalance Charge in the

following amounts:


13.2.1. Normal Operating Conditions - For monthly imbalances accumulated

during normal operating conditions, Shipper’s Monthly Imbalance

Charge shall equal zero for monthly imbalances between zero and 5

percent, and $0.10 per MMBtu for imbalances in excess of 5 percent.

For purposes of this section, Shipper’s actual cumulative receipts

during normal operating conditions stated as a percent of actual

cumulative deliveries during normal operating conditions during the

Billing Month.


13.2.2. OFO Operating Conditions - For monthly imbalances accumulated during

periods when an OFO pursuant to Section 11 is in effect, Shipper’s

Monthly Imbalance Charge on monthly imbalances shall be as forth in

the applicable bracket: