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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. Waste weir and Spillway from Ashokan reservoir. Spillway bridge (Contract 111) with clear span of 175 feet and rise of 25 feet. Contract 3. August 5, 1914." The New York Public Library Digital Collections. 1918. https://qa-digitalcollections.nypl.org/items/510d47da-dd40-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Ashokan Reservoir. Waste weir and Spillway from Ashokan reservoir. Spillway bridge (Contract 111) with clear span of 175 feet and rise of 25 feet. Contract 3. August 5, 1914." New York Public Library Digital Collections. Accessed November 22, 2024. https://qa-digitalcollections.nypl.org/items/510d47da-dd40-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1918). Ashokan Reservoir. Waste weir and Spillway from Ashokan reservoir. Spillway bridge (Contract 111) with clear span of 175 feet and rise of 25 feet. Contract 3. August 5, 1914. Retrieved from https://qa-digitalcollections.nypl.org/items/510d47da-dd40-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/510d47da-dd40-a3d9-e040-e00a18064a99 | title=
(still image)
Ashokan Reservoir. Waste weir and Spillway from Ashokan reservoir. Spillway bridge (Contract 111) with clear span of 175 feet and rise of 25 feet. Contract 3. August 5, 1914., (1918)|author=Digital Collections, The New York Public Library |accessdate=November 22, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>