Transmission Line drawings, mostly underground including: Maple Valley to Massachusetts Substation, Covington to Duwamish, Alaskan Way Viaduct to University St, Covinton to Factoria interchange, Cambridge corridor crossing towers, Alki to Harbor Ave., Portion of Covington - Seattle Right of Way, Broad St Substation to Lake Union Steam Plant, South substation to Delridge, North substation, E Pine to Beacon Hill, Union St substation to University, 1954-1991, Cabinet: 17-5, Folder: 2. City Light Plans and Drawings, 1202-08. Seattle Municipal Archives. https://leglas100/finding-aids/repositories/2/archival_objects/171428 Accessed May 27, 2026.