Northwest Pipeline Corporation

First Revised Volume No. 1-A

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

Second Revised Sheet No. 317 Second Revised Sheet No. 317 : Effective

Superseding: First Revised Sheet No. 317

RATE SCHEDULE TF-1

Firm Transportation

(Continued)

11. FACILITIES REIMBURSEMENT

Facilities contemplated by Section 1(b) of this Rate Schedule may

be installed by either Transporter or Shipper as provided below:

(a) Transporter will pay for all or part of the cost of the

modification or construction of facilities required at receipt or

delivery point(s) to effectuate the receipt or delivery of natural

gas hereunder, when the construction or modification of such

facilities is economically beneficial to Transporter.

For the purposes of determining whether a gas supply project

is economically beneficial to Transporter, Transporter will

evaluate each prospective project based upon the amount of the

reserves and deliverability characteristics of the gas supply to

be attached. Facility additions at receipt points shall be

evaluated based upon the incremental cost of service of the

facilities to be constructed by Transporter (including the cost of

real property rights acquisition), and the incremental revenues

which Transporter estimates will be generated as a result of

constructing and/or modifying such facilities.

For the purposes of determining whether a project to deliver

gas is economically beneficial to Transporter, Transporter will

evaluate each prospective project based upon the incremental cost

of service of the facilities to be constructed by Transporter

(including the cost of real property rights acquisition), and the

incremental revenues which Transporter estimates will be generated

as a result of constructing and/or modifying such facilities.

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 of 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: