Portland Natural Gas Transmission System

Second Revised Volume No. 1

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Effective Date: 09/01/2006, Docket: RP06-449-000, Status: Effective

Original Sheet No. 3 Original Sheet No. 3 : Effective

PRELIMINARY STATEMENT

Portland Natural Gas Transmission System ("Transporter"), a Partnership formed

under the laws of the State of Maine, is a natural gas company engaged in the

business of transporting on its System natural gas owned by Shippers.

Transporter's System extends in a southeasterly direction from a point on the

international border between the United States and Canada near Pittsburg, New

Hampshire, where Transporter's facilities interconnect with those of

TransCanada PipeLines Limited, through the States of New Hampshire, Vermont,

and Maine to an interconnection with the facilities of Tennessee Gas Pipeline

Company near Dracut, Massachusetts. Transporter shall transport natural gas

for shippers only pursuant to written contracts, in the form of agreements

contained herein, and pursuant to authorization granted by the Federal Energy

Regulatory Commission. Transporter is not a common carrier.