Caprock Pipeline Company

First Revised Volume No. 1

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Effective Date: 10/01/1997, Docket: TM98-1-84-000, Status: Effective

Sixth Revised Sheet No. 4 Sixth Revised Sheet No. 4 : Superseded

Superseding: Fifth Revised Sheet No. 4

RATE SCHEDULE FS

FIRM SERVICE

CURRENTLY EFFECTIVE RATES

Each rate shown on this Tariff Sheet is the currently

effective rate pertaining to the particular Rate Schedule and

service to which it is referenced. Each such rate is

separate and independent and a change in anysuch rate shall

not thereby effect a change in any other Rate Schedule. Each

rate is a system-wide rate for each segment of Caprock's

system and applies to any jurisdictional transportation

undertaken on any segment of Caprock's jurisdictional system.

JURISDICTIONAL SERVICE

Maximum Minimum

Usage Rate (per MMBtu) $0.01026 $0.01026

Reservation Charge (per MMBtu) $0.47540 $0.00000

Availability: The above rates are system-wide rates and are

available to any customer qualified to receive firm

transportation service under Part 284 of the regulations of

the Federal Energy Regulatory Commission ("FERC"), 18 C.F.R.

Part 284, and which: (1) has executed a Transportation

Service Agreement with Caprock applying to service under this

Rate Schedule, and (2)will deliver and take redelivery of

natural gas at some point on the Caprock System into which

the gas was delivered.

Applicability and Character of Service: This Rate Schedule

will apply to all gas transported by Caprock under this Rate

Schedule on a firm basis. Daily nominations of deliveries

under this Rate Schedule shall be considered firm and will

not be subject to curtailment or interruption except as

otherwise provided in the General Terms and Conditions of

Caprock's FERC Gas Tariff. Nominations and scheduling as to

service under this Rate Schedule shall be governed by the

General Terms and Conditions of Caprock's FERC Gas Tariff.

Shippers shall pay an ACA adjustment of $0.0022 per MMBtu,

in addition to the specified commodity rate for the

transportation service as specified in the General Terms and

Conditions.