Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

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Effective Date: 01/31/2008, Docket: RP08-130-000, Status: Effective

Original Sheet No. 22-C Original Sheet No. 22-C : Effective

10. RESERVATION CHARGE ADJUSTMENTS (Continued)

(c) At the end of each calendar year, Transporter will post the

Annual Deficiency Volume and the Annual Exemption Volume for each

affected Constraint Point. Transporter will then compare the

Annual Deficiency Volume for each affected Constraint Point to the

Annual Exemption Volume for that Constraint Point. If there is an

Excess Deficiency Volume for any Constraint Point, Transporter

will allocate such Excess Deficiency Volume pro rata to the

affected Shippers, based on Constraint Point Firm Rights during

the Deficiency Period(s). Each Shipper's allocation will be the

sum of its applicable Constraint Point Firm Rights for all

Deficiency Periods divided by the sum of the applicable Constraint

Point Firm Rights of all Shippers for those Deficiency Periods,

multiplied by the Excess Deficiency Volume for a Constraint Point.

(d) Transporter will calculate reservation charge adjustments

under each Service Agreement by multiplying a Shipper's allocated

share of the Excess Deficiency Volume for each Constraint Point by

the weighted average Base Tariff Reservation Charge paid under

such Service Agreement for such Constraint Point for the

Deficiency Periods during which the Service Agreement was in

effect.

10.4 Payment. All reservation charge adjustments will be issued or

refunds paid within 90 days from the end of the applicable calendar

year.