Substations - Duwamish Substation Construction - 120 film 2 1/4 x 3 1/4 negatives Negative numbers 1-496 and approximately 50 unnumbered; approximately 70 not scanned. Scans created from prints in Box 1/27., 1955 - 1956, Box: 2, Folder: 13. Seattle City Light Substation Photographs, 1204-22. Seattle Municipal Archives. https://leglas100/finding-aids/repositories/2/archival_objects/169974 Accessed June 29, 2026.