Affiliates with Marketing Function Employees

TC Ravenswood, LLC

c/o CT Corporation System

111 Eighth Avenue

New York, NY 10011

TransCanada Energy Ltd.

450 - 1^st Street S.W.

Calgary, Alberta

T2P 5H1

TransCanada Power Marketing Ltd.

c/o Corporation Trust Company

Corporation Trust Center

1209 Orange Street

Wilmington, Delaware 19801

TransCanada Gas Storage USA, Inc.

c/o Corporation Trust Company

Corporation Trust Center

1209 Orange Street

Wilmington, Delaware 19801

Background Information

This information is being provided to the meet the regulatory requirement imposed by FERC Order 717 and 18 C.F.R § 358.7 (e) (1).