Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 08/01/1999, Docket: RP99-410-001, Status: Effective

Substitute Third Revised Sheet No. 175 Substitute Third Revised Sheet No. 175 : Effective

Superseding: Second Revised Sheet No. 175

GENERAL TERMS AND CONDITIONS

1. DEFINITION OF TERMS

Except where the context expressly states otherwise, the

following terms, when used in this FERC Gas Tariff, Second

Revised Volume No. 1 (Tariff), and any Rate Schedules and Service

Agreements incorporating said Tariff, shall be construed to have

the following meanings:

1.1 The term "Annual Delivery Quantity (ADQ)" means the

maximum firm quantity of natural gas in equivalent dkt, as

specified in Exhibit A to a Service Agreement, which Transporter

shall deliver on an annual basis for Shipper.

1.2 The term "Annual Receipt Quantity (ARQ)" means the maximum

firm quantity of natural gas in equivalent dkt, as specified in

Exhibit A to a Service Agreement, which Transporter shall receive

for transportation on an annual basis for Shipper.

1.3 The term "Btu" means "British thermal unit". The standard

Btu is the International Btu, which is also called the Btu(IT).

The international Btu is specified for use in the gas measurement

standards of the American Gas Association, the American Petroleum

Institute, the Gas Processors Association and the American

Society for Testing Materials.

1.4 The term "business day" means any day, Monday through

Friday, excluding federal banking holidays for transactions

occurring in the United States and similar holidays for

transactions occurring in Canada and Mexico.

1.5 The term "cubic foot" means the volume of gas which

occupies one cubic foot when such gas is at a temperature of 60

degrees Fahrenheit, and at a pressure of 14.73 psia.

1.6 The term "day" means a period of twenty-four consecutive

hours, beginning and ending at 9 a.m. Central Clock Time.

1.7 The term "dekatherm (dkt)" means the quantity of heat

energy which is equivalent to 1,000,000 Btu's. One "dekatherm"

of gas means the quantity of gas which contains one dekatherm of

heat energy. The total dekatherms are calculated by multiplying

the gas volume in Mcf by its total gross heating value, divided

by 1,000. The standard quantity for nominations, confirmation,

and scheduling is dekatherms per gas day in the United States.