Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 05/01/2006, Docket: RP06- 72-000, Status: Effective

Original Sheet No. 306 Original Sheet No. 306 : Effective

GENERAL TERMS AND CONDITIONS

45. COMPRESSOR USAGE SURCHARGE (Continued)

45.3 Filing Requirements

Company shall file with the Federal Energy Regulatory

Commission to reflect net changes to establish a revised

Compressor Usage Surcharge rate at least 30 days prior to

each May 1 of each year.

45.4 Methodology

The methodology used to derive the Compressor Usage

Surcharge is as follows:

The Compressor Usage Surcharge to be applicable for

each year beginning on May 1 shall be equal to the sum

of Estimated Usage Costs and the Usage Cost True-Up

Mechanism. The total of such costs shall be divided by

the annual system-wide dekatherm miles to obtain the

Compressor Usage Surcharge to be effective May 1 of

each year.