Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 02/20/2009, Docket: RP09-227-000, Status: Effective

Second Revised Sheet No. 20 Second Revised Sheet No. 20

Superseding: First Revised Sheet No. 20

RATE SCHEDULE TF-1

Firm Transportation

(Continued)

3. MONTHLY RATE(S) (Continued)

3.6 Charges for Capacity Release Service: The rates for capacity

release service are set forth in Sheet No. 5. See Section 22 of the

General Terms and Conditions for information about rates for capacity

release service, including information about acceptable bids. In the

event of a base tariff maximum and/or minimum rate change, wherein the

Replacement Shipper has not agreed to pay the maximum base tariff rate

or a percentage of the maximum base tariff rate (as it may change from

time-to-time), the Replacement Shipper will be obligated to pay:

(a) for capacity release transactions that are subject to the

maximum base tariff rate pursuant to FERC regulations: the lesser

of the awarded bid rate and the new maximum base tariff rate

unless the awarded bid rate is less than the new minimum rate, in

which case the new minimum rate will apply for the remaining term

of the release.

(b) for capacity release transactions that are not subject to the

maximum base tariff rate pursuant to FERC regulations: the greater

of the minimum base tariff rate and the awarded bid rate for the

remaining term of the release.

3.7 Negotiated Rates: Notwithstanding the general provisions of this

Section 3, if Transporter and Shipper mutually agree to Negotiated Rates

for service hereunder, such Negotiated Rates will apply in lieu of the

otherwise applicable rates identified in this Section 3.

3.8 Facility Reimbursement: If Transporter and Shipper enter into a

facilities agreement pursuant to Section 21 of the General Terms and

Conditions for Transporter to construct receipt or delivery facilities

necessary to provide service under this Rate Schedule and for Shipper to

reimburse the associated costs by paying a facility reimbursement

charge, the facility reimbursement charge will be set forth on Exhibit C

to an executed Service Agreement.