Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 05/11/2009, Docket: RP09-506-000, Status: Effective

Seventh Revised Sheet No. 235 Seventh Revised Sheet No. 235

Superseding: Sixth Revised Sheet No. 235






with such interconnecting pipeline(s), pursuant to mutual

agreement. The OBA is provided on Transporter's Website

under Other Information and follows the format of the NAESB

WGQ Model OBA [NAESB Model 6.5.2]. Any variance between

scheduled receipt and/or delivery quantities and actual

flowing gas then shall be treated in accordance with the

OBA. Receipt Point Operational Balancing Agreement:

If gas is to be received at a receipt point designated on

Transporter's Master Receipt Point List or Master Gathering

Point List, Transporter may enter into a Receipt Point

Operational Balancing Agreement (ROBA) provided on

Transporter's Website under Other Information, with the

Controlling Party at such receipt point, pursuant to mutual

agreement. Any variance between scheduled receipt

quantities and actual receipt quantities then shall be

treated in accordance with the ROBA. Predetermined Allocations: The types of

allocation methodologies is a list from which two parties

may agree. If the two parties cannot agree upon an

allocation methodology, pro rata based upon confirmed

nominations should be used as the default method. The party

responsible for custody transfer (the party performing the

measurement function) should provide the allocation. The

transportation service providers should accept NAESB-

approved allocation methodology types from the upstream or

downstream custody transfer party who is providing the point

confirmation. The same standard allocation methodologies

should be available for use at all points. Predetermined Allocation Methodology:

At receipt and/or delivery point(s) other than

point(s) with an OBA or ROBA in effect, where gas is

to be received for the account of and/or delivered to

more than one Shipper, the upstream or downstream

party providing the point confirmation should submit

the pre-determined allocation to the allocating party

after or during confirmation and before start of gas

day, in writing or via an electronic communication

mechanism, which allocates receipt(s) or delivery(ies)

daily at each receipt and/or delivery point based upon

scheduled nominations.