Canal lock References External links Site for the lift lock's 100th anniversary Peterborough Lift Lock views Lock 21 - Peterborough Lift Lock - Trent-Severn Waterway National Historic Site of Canada Boat lifts Canals in Ontario Locks of Canada National Historic Sites in Ontario Lift Lock, Peterborough Transport museums in Ontario Canal museums Museums in Peterborough, Ontario Transport in Peterborough, Ontario Transport infrastructure completed in 1904 Transport buildings and structures in Ontario 1904 establishments in Ontario