During the digging and construction of the Lake Washington Ship Canal at Fremont, a temporary trestle bridge was opened in 1912 for pedestrians and other traffic. Also to support the canal project, a timber dam was built to hold back the waters of Lake Union were held back from the construction area. The damage to the trestle bridge when the dam broke was repaired and it reopened within three weeks. Sources: HistoryLink Essay 20374. Photo courtesy of Seattle Daily Times, March 14, 1914, pages 1, 5, and 12.