Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 05/05/2006, Docket: RP00-107-010, Status: Effective

Sixth Revised Sheet No. 252A.01 Sixth Revised Sheet No. 252A.01 : Effective

Superseding: Fifth Revised Sheet No. 252A.01

GENERAL TERMS AND CONDITIONS (Continued)

15. BALANCING AND NOMINATION VARIANCE PROCEDURES (Continued)

If the sum is negative (net MDDQ Unauthorized Overrun Penalty

revenues are less than net costs) Transporter shall carry over

such amount to the subsequent month and include it in such

subsequent month's calculation until Transporter is made whole.

The portion of any MDDQ Unauthorized Overrun Penalty revenues to

be credited to each Qualifying Shipper shall be based on the ratio

of each Qualifying Shipper's applicable monthly MDDQ to the total

of the Qualifying Shippers' monthly MDDQ for the month in which

the MDDQ Unauthorized Overrun Penalty obligation(s) is incurred.

The credit shall be applied to each Qualifying Shipper's monthly

bill issued three (3) months subsequent to the month the MDDQ

Unauthorized Overrun Penalty obligation(s) was paid.

15.16 Rate Schedule FT-1 quantities taken at a delivery point(s)

which exceed the applicable MDDQ, as adjusted pursuant to the CAP, by

more than the greater of two (2) percent or forty (40) dkt, will be

treated as MDDQ overruns and charged Transporter's Rate Schedule FT-1

authorized Scheduled Overrun Charge.

15.17 ADQ Unauthorized Overrun Penalties:

15.17.1 Rate Schedule FT-1 quantities taken at a delivery

point(s) which exceed the applicable ADQ, as adjusted pursuant to

the CAP, by more than one-half (.5) of one percent, and that have

not been authorized pursuant to Section 6 of Rate Schedule FT-1,

will be treated as ADQ Unauthorized Overruns and charged two (2)

times the currently effective Rate Schedule IT-1 rate during non-

critical periods or two (2) times the unauthorized overrun Index

Price during critical periods.

15.17.1.1 For purposes of this Subsection 15.17.1, the

maximum Rate Schedule IT-1 commodity base rate effective at

the beginning of the month the ADQ Unauthorized Overrun

Penalty is incurred shall be the penalty rate and shall be

treated as a final rate for ADQ Unauthorized Overrun Penalty

purposes.

15.17.1.2 The unauthorized overrun Index Price shall

consist of the arithmetic average of the posted index prices

in the "Inside FERC Gas Market Report" for Colorado

Interstate Gas Company (CIG-Rocky Mountains) and Northern

Natural Gas Company (Ventura, Iowa), as established for the

first day of the month following the month in which the ADQ

Unauthorized Overrun occurred.