Plan profile and sections of proposed line of the Wissahickon high level cut off sewer from the terminus northwest of School House Lane to the Wissahickon high level sewer. [1 sheet], 1929 August 23, Drawer: W23 & W24, Folder: 5. Wissahickon Valley Park Maps, Plans and Drawings, FP.2011.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/49971 Accessed April 20, 2025.