Seattle Electric Co.

Reporting mark: SECo
Ballard Swing Bridge (Old) (King County, Washington)
Built in 1910; replaced in 1916
Lost Howe through truss bridge over Lake Washington Canal on 14 Avenue
Replaced by a new bridge

Latona Bridge (King County, Washington)
Built 1890; Rebuilt 1909 to allow pedestrian & vehicular traffic; Replaced 1919
Lost Pennsylvania through truss bridge over Union Lake/Lake Washington Canal on Trolley Cars
No longer exists

Latona Railroad Bridge (1902) (King County, Washington)
Built 1902; removed 1932
Lost Pony/through plate girder bridge over Lake Washington Canal on Seattle Electric Railway
No longer exists

SECo - Lesci Park Bridge (King County, Washington)
Abandoned closed-spandrel arch bridge over Lake Washington Boulevard
Abandoned

Stone Way Bridge (King County, Washington)
Built 1911; Demolished 1917
Pratt through truss bridge over Lake Union on Electric Railroad
Removed