Western Gas Interstate Company

Third Revised Volume No. 1

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Effective Date: 06/01/1993, Docket: RS92- 53-003, Status: Effective

Revised Original Sheet No. 272 Revised Original Sheet No. 272 : Superseded

GENERAL TERMS AND CONDITIONS

(continued)

(ii) after commencement of a month, based upon

flowing gas quantities at the affected

Receipt Point(s) and Delivery Point(s)

scheduled for firm service over the previous

Day and nominated for the ensuing Day(s).

(2) Alternate Receipt and Delivery Point Capacity -

When capacity available to be scheduled for use

among firm Shippers is less than the quantity

nominated and confirmed at an Alternate Receipt

Point or Delivery Point, the capacity available

for such firm service at each affected Point

shall be prorated among firm Shippers based upon

quantities nominated for firm service at the

affected Receipt Point(s) and Delivery Point(s)

for that Day.

(3) Mainline Capacity - When mainline capacity

available to be scheduled for use among firm

Shippers is less than the quantity nominated and

confirmed, the mainline capacity available for

such firm service shall be prorated among firm

Shippers such that the quantity available to be

scheduled for a given Shipper is the lesser of

(i) that Shipper's confirmed nomination and (ii)

the operational mainline capacity multiplied by

the quotient of that Shipper's MDTQ and the sum

of the MDTQs of each Shipper who nominated

affected firm service. Western agrees to offer

to enter into contracts to provide firm service

on a first-come, first-served basis but only up

to the prudent operating limits of its system.

(4) Production and Gathering Capacity - When

production and gathering line capacity available

to be scheduled for use among firm Buyers and

Shippers is less than the quantity nominated and

confirmed, the production and gathering line

capacity available for such firm services shall

be prorated among firm Buyers and Shippers such

that the quantity available to be scheduled for a

given Buyer or Shipper is the lesser of (i) that