U.S. DOT/PHMSA - Letter of Decision

Page 1u.s. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Ave., SE Washington, DC 20590 SEP 1 7 2010 Mr. David Chittick Director, Pipeline Engineering TransCanada Pipelines Limited 450 - 1st Street, S.W. Calgary, Alberta, Canada T2P 5Hl Docket No. PHMSA-2009-0061 Dear Mr. Chittick: On February 6, 2009, TransCanada Pipeline Limited-American Natural Resources (TCPL-ANR) wrote to the Pipeline and Hazardous Materials Safety Administration (PHMSA) requesting a special permit to waive compliance from PHMSA's pipeline safety regulation in 49 CFR § 192.611, for one (1) segment of the TCPL-ANR natural gas transmission pipeline system located in Lucas County, Ohio. The regulation requires confirmation or revision of the maximum allowable operating pressure (MAOP) of a pipeline segment where the class location has changed. PHMSA is denying this special permit request, which would have allowed TCPL-ANR to continue to operate a segment of the 20-inch Line 515 pipeline in Lucas County, Ohio at its current MAOP of 858 pounds per square inch gauge (psig). The reason for this denial can be found in the Special Permit Analysis and Findings document enclosed with this letter. This document and all other pertinent documents are available for review in Docket No. PHMSA- 2009-0061 in the Federal Docket Management System (FDMS) located on the internet at www.Regulations.gov. PHMSA will grant TCPL-ANR until September 30, 2011, to complete pipe replacements required to comply with the requirements of 49 CFR § 192.611. My staff would be pleased to discuss this special permit or any other regulatory matter with you. John Gale, Director of Regulations (202-366-4046), may be contacted on regulatory matters and Jeff Gilliam, Director of Engineering (303-888-2587), may be contacted on technical matters specific to this special permit. Sincerely, e rey D. Wiese Associate Administrator for Pipeline Safety Enclosure: Special Permit Analysis & Findings#