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Photographs of the Catskill water supply system in process of construction
General Research Division, The New York Public Library. "Ashokan reservoir. Dividing weir with foundation piers for Ashokan bridge. West basin and Winchell hill at right and Discharge channel to East basin at left. Contract 3. October 26, 1914." The New York Public Library Digital Collections. 1918. https://digitalcollections.nypl.org/items/510d47da-dd4c-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Ashokan reservoir. Dividing weir with foundation piers for Ashokan bridge. West basin and Winchell hill at right and Discharge channel to East basin at left. Contract 3. October 26, 1914." New York Public Library Digital Collections. Accessed April 25, 2024. https://digitalcollections.nypl.org/items/510d47da-dd4c-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1918). Ashokan reservoir. Dividing weir with foundation piers for Ashokan bridge. West basin and Winchell hill at right and Discharge channel to East basin at left. Contract 3. October 26, 1914. Retrieved from https://digitalcollections.nypl.org/items/510d47da-dd4c-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47da-dd4c-a3d9-e040-e00a18064a99 | title=
(still image)
Ashokan reservoir. Dividing weir with foundation piers for Ashokan bridge. West basin and Winchell hill at right and Discharge channel to East basin at left. Contract 3. October 26, 1914., (1918)|author=Digital Collections, The New York Public Library |accessdate=April 25, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>