Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 11/01/2007, Docket: RP07-425-000, Status: Effective

Fourth Revised Sheet No. 203 Fourth Revised Sheet No. 203 : Effective

Superseding: Third Revised Sheet No. 203



Contract Year. "Contract Year" shall mean a one year period commencing on

the November 1 "gas day" and extending twelve months through October 31.


Cricondentherm Hydrocarbon Dew Point (CHDP) - The term "cricondentherm hydrocarbon

dew point," or "cricondentherm temperature" shall mean the highest dew point

temperature seen on a liquid-vapor curve for gas over a range of pressure, i.e.,

200-1400 pounds per square inch absolute (psia).


Cubic Foot. The term "cubic foot" shall mean the volume of gas which

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

Fahrenheit (60 F), and at a pressure of fourteen and seventy-three

hundredths pounds per square inch absolute (14.73 psia) and corrected for

deviation from ideal gas behavior.


CST. The term "CST" shall mean Central Standard Time or Central Daylight

Time, whichever is applicable.


Commission. The term "Commission" or "FERC" shall mean the Federal Energy

Regulatory Commission or any successor federal governmental body or agency

which is given the authority to regulate, review and/or oversee, in total

or in part, the activities of interstate natural gas pipeline companies.


Day. The term "day" shall mean a period of twenty-four (24)

consecutive hours, beginning at 12:00 Midnight CST, and ending at 12:00

Midnight CST, the following twenty-four (24) hour period.


Dekatherm. The term "dekatherm" (also spelled decatherm) or "Dth," which is equal

to 10 therms, shall be the standard unit of measure for energy content. A

dekatherm is one million (1,000,000) British thermal units, which is equivalent to

1 MMBtu. The Btu is measured on a total heating value (also known as gross

heating value and higher heating value) basis. A dekatherm shall be the standard

unit of quantity. However, any document containing "MMBtu" as the unit of

quantity shall be deemed to be "Dth."


Delivery Point. The term "Delivery Point" or "Point of Delivery" shall

mean the point, which may or may not be a physical point, at which

Northern delivers gas to the Shipper.


Delivery Point Operator. The term "Delivery Point Operator" shall include

any person interconnected to Northern or acting as agent for the

interconnected party who is authorized to confirm Shipper delivery point

nominations and ensure, in cooperation with the Shipper and other parties

in the confirmation path, that physical flows conform to the delivery

point nominations. The Delivery Point Operator must have the ability to

control or cause the control of the physical operation of the facilities

interconnected to Northern.


Electronic Transmission. The term "Electronic Transmission" shall mean a mutually

agreeable means of data communication whereby data is input by the Shipper

directly into Northern's internal system applications either by keypunch or by

means of electronic data file processing.


Excess Royalty. The term "Excess Royalty" shall mean any payment for

royalty in excess of the normal 1/8 royalty, based on a unit price other

than that actually paid for gas at the time of purchase, or an amount paid

on a settlement payment.


Field Area. The term "Field Area" will mean the geographical area located south

of the inlet to Northern's Clifton Compressor Station in Clay County, Kansas.


F/M Demarcation. The F/M Demarcation is a point of interest (POI) located

at the inlet to the Clifton Compressor Station, which is the boundary

between the Market and Field Area. The F/M Demarcation POI may be used as

a delivery point in the Market or Field Area or a receipt point in the

Market Area or Field Area.