Northwest Pipeline Corporation

First Revised Volume No. 1-A

Effective Date: 10/27/1993, Docket: RP93-199-000, Status: Effective

First Revised Sheet No. 304-A First Revised Sheet No. 304-A : Effective

Superseding: Original Sheet No. 304-A

RATE SCHEDULE TI-1

Interruptible Transportation

(Continued)

10. FACILITIES REIMBURSEMENT (Continued)

In estimating the revenues to be generated, Transporter will

calculate the revenues based upon its currently effective

transportation rates, exclusive of any surcharges such as GRI, SSP

and ACA charges, and the projected incremental volumes which will

result from the project. Transporter will consider volumes to be

incremental if any of the following criteria are met:

(i) the volumes which will be transported through the

contemplated facilities are in excess of the volumes which

could be transported through existing metering facilities

considering both the capacity of the existing facilities and

currently effective priorities of service through such

meters; or

(ii) the volumes which will be transported are to a new end-

use customer or market, or to a customer or market which

hasn't been served for the twelve months prior to the date

of request for the facilities additions; or

(iii) the volumes which will be transported would not

otherwise flow through Transporter's system. To verify that

the volumes would not otherwise be transported through

Transporter's system, Shipper shall submit an affidavit to

Transporter including a statement certifying that unless

Transporter pays for the contemplated facilities, Shipper

will not flow the volumes through Transporter's system.

In calculating the incremental cost of service of the

facilities to be constructed, Transporter shall utilize the

methodologies for calculating cost of service which underlie its

currently effective transportation rates.