Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 01/19/2007, Docket: RP07-115-000, Status: Effective

Third Revised Sheet No. 139 Third Revised Sheet No. 139 : Effective

Superseding: Second Revised Sheet No. 139






18.3 Creditworthiness (Continued)


(D) Creditworthiness for Interruptible Transportation Service



(3) (Continued)


(c) Letter of Credit: Shipper may post a Letter of Credit

(LC) in a form acceptable to GTN. A form of LC is

available on GTN's Internet website. For interruptible

service, the amount of the LC must be up to the maximum

amount of the services that may be provided in any three-

month period under an interruptible Agreement.


(d) Flexible Credit Account: As an alternative to providing

security for interruptible service based upon the maximum

amount of service that may be provided in any three-month

period, a Shipper may establish a flexible credit account

by providing either a letter of credit or cash security

deposit in an amount defined by Shipper. The minimum

amount of security required under this option equals the

maximum amount of service that may be provided in one

day. Once Shipper has taken service up to the point

where the security provided is insufficient to cover the

maximum amount of service that may be provided in one

day, Shipper will not be entitled to receive further

interruptible service until Shipper 1) pays all or a

portion of the amounts due for interruptible service or

2) Shipper provides GTN with additional security. Firm

Shippers may utilize security provided for firm

transportation service that is in excess of the amount

necessary to collateralize Shipper's Firm Transportation

Service Agreement(s) in order to establish a flexible

credit account. Cash security deposits under this

security option, including excess firm security balances,

will earn interest at the applicable monthly "Federal

Funds (effective)" rate published in the Federal Reserve

Statistical Report H.15. Interest will be paid by GTN on

an annual basis each September 1 or at the time Shipper's

deposit is returned due to either a return to

creditworthiness by Shipper or the expiration of

Shipper's Agreement(s).