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• John G Cooke & Associates Ltd. | Consulting Engineers | March 3, 2005

• Public Works and Government Services Canada | Heritage Conservation Program | February 8, 1999

• Smithsonian | National Museum of American Art & Renwick Gallery and the National Portrait  Gallery Gallery | December 14, 1998

• UMA Engineering Ltd | Martin Weaver Conservation Consultant Inc. | June 2, 1998

• United States Department of the Interior | National Park Service, Historic Preservation Training Centre | April 2, 1998

• Office of the Governor La Fortaleza | Lilliane D. Lopez, Arch., State Historic Preservation Officer |    September 15, 1997