It is a rare example of a skewed lift bridge. The DECC is located on the waterfront near Duluth's famous Aerial Lift Bridge. Eastbound traffic on I-278 accesses the island by first exiting onto the lift bridge viaduct. Construction on the present steel vertical lift bridge across the Derwent began in 1939. The bridge was completed in 1908 as a Scherzer Rolling Lift Bridge. However, it could be replaced with a lift bridge if needed. NYCH continued to use the single lift bridge at Bush Terminal instead. This differs from a lift bridge or table bridge, which operate by raising the roadway. The Portage Lift Bridge is the world's heaviest and widest double-decked vertical lift bridge. The bridge was a wooden folding lift bridge constructed to a design by William Harman. The camera booth scene was shot on the Burlington Canal Lift Bridge, southwest of Toronto.