Western Gas Interstate Company

Fourth Revised Volume No. 1

Effective Date: 07/01/2003, Docket: RP03-525-000, Status: Effective

Second Revised Sheet No. 137A Second Revised Sheet No. 137A : Effective

Superseding: First Revised Sheet No. 137A

RATE SCHEDULE RCS

FIRM TRANSPORTATION SERVICE - RELEASED CAPACITY

(continued)

(d) For biddable releases of one (1) year or more: (i) offers should

be tendered by 12:00 p.m. four (4) Business Days before the award;

(ii) open season ends no later than 1:00 p.m. on the Busines Day

before nominations are due (open season is three (3) Business Days);

(iii) evaluation period begins at 1:00 p.m. during which contingency

is eliminated, determination of best bid is made, and ties are

broken; (iv) evaluation period ends and award is posted if no match

is required at 2:00 p.m.; (v) match or award is communicated by 2:00

p.m.; (vi) match response by 2:30 p.m. (vii) where match is

required, award is posted by 3:00 p.m.; (viii) contract issued

within one hour of award posting (with a new contract number, when

applicable); nomination possible beginning at the next available

nomination cycle for the effective date of the contract.