Western Gas Interstate Company

Fourth Revised Volume No. 1

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Effective Date: 11/01/2003, Docket: RP00-461-002, Status: Effective

Second Revised Sheet No. 231 Second Revised Sheet No. 231 : Effective

Superseding: First Revised Sheet No. 231

GENERAL TERMS AND CONDITIONS

(continued)

19.4 Balancing Charges - Nothing in this Section 19.4 shall limit

Western's right to take actions as may be required to adjust

receipts and deliveries of gas in order to alleviate conditions

which threaten the integrity of its system, including maintenance

of service to higher priority customers.

If Shipper fails to maintain a balance of receipts and deliveries,

Western shall impose one or more of the balancing charges as

applicable. Except with respect to the balancing charge provided

in (d) below, however, no balancing charge shall be assessed

unless Western has notified Shipper that an imbalance has occurred

or will occur without corrective action and Shipper has failed to

take action in coordination with Western's gas dispatchers.

However, Western will not assess balancing charges in the event

Shipper's failure to take corrective action is due to Force

Majeure, curtailment, or other unavailability of capacity; and any

period for such corrective action shall be extended accordingly

when Shipper is prevented by such Force Majeure, curtailment or

other unavailability of capacity to take such corrective action.

In calculating quantities for the determination of charges herein,

Western shall take into consideration (1) Retention Quantities,

(2) make-up quantities delivered pursuant to Western's

notification to correct any excess or deficiency in receipts and

deliveries and (3) for purposes of assessing balancing charges,

any offsetting excess or deficiency in receipts and deliveries at

the affected Receipt Point(s) and Delivery Point(s) under other

Service Agreements between Western and Shipper. Any two Shippers

may agree to trade equal quantities of opposite imbalances that

occur at any Receipt or Delivery Point during the same period,

provided that such Points are located on the same pipeline segment.

Shippers give Western written notice of such trade at least seven

days before payment is due for the otherwise applicable imbalance

penalties and Western confirms that the two Shippers in fact have

eligible offsetting imbalances. To facilitate the trading of

imbalances, Western shall provide imbalance quantities of any

Shipper authorizing the disclosure of such imbalances to any

Shipper requesting such information.