Maple Leaf Pipeline - Cleaning and relining, 18th and Prospect to 20th NE and NE 65th exc. under canal - prints - February 1955 - 04162 to 04163, 1955 - 1955, Box: 3, Folder: 04162. Water Department Photographic Negatives, 8200-13. Seattle Municipal Archives. https://leglas100/finding-aids/repositories/2/archival_objects/194457 Accessed June 02, 2026.