Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 05/08/2008, Docket: RP08-311-000, Status: Effective

First Revised Sheet No. 250 First Revised Sheet No. 250 : Effective

Superseding: Original Sheet No. 250

GENERAL TERMS AND CONDITIONS

(Continued)

20. LIQUIDS REVENUE CREDITING

20.1 Applicability. Revenues received by Transporter related to the

processing of mainline gas at Williams Gas Processing Company's (WGP)

Ignacio Plant will be credited to all Shippers transporting gas on

Transporter's system during the applicable time period.

20.2 Revenues to be Credited. Transporter will credit to eligible

Shippers 100 percent (100%) of the annual liquids revenues it receives

from WGP pursuant to the Joint Offer of Settlement Relating to Gas

Processing in Docket No. RP95-409.

20.3 Distribution Method. Revenue credits will be distributed to all

Shippers on a pro rata basis using each Shipper's monthly metered

transportation quantities, as reflected on Shipper's invoice, as a

percentage of the monthly total system transportation quantities for the

applicable year. Revenue crediting will be based on all transportation

service agreements utilized by each Shipper and not on an individual

transportation service agreement basis.

20.4 Timing of Credits. Payment will be made annually as a credit

against each Shipper's February invoice unless Transporter elects to

issue checks in February to all Shippers. However, Transporter will

issue a check to the Shipper if there is a net credit due the Shipper

unless the Shipper requests that the credit be carried over to

subsequent invoices due to a de minimis credit amount.

20.5 Interest. Transporter will pay interest to each Shipper, in

accordance with the procedures outlined in Section 154.501(d) of the

Commission's regulations, from the date the liquids revenues are

received by Transporter each month to the date the annual revenue

credits are disbursed to Shipper by check or, in the event of a credit

against Shipper's invoice, to the date the invoice is due to be paid.

20.6 Prior Period Adjustments. For purposes of liquids revenues

allocations, any adjustments affecting the transportation quantities for

a prior month will be applied to the current month during which the

adjustment was made.