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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. View of Esopus creek at Olive Bridge dam site, showing coffer -dams and two lines of 8-foot steel pipes for carrying flow of creek. August 8, 1907." The New York Public Library Digital Collections. 1918. https://digitalcollections.nypl.org/items/510d47da-dd22-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Ashokan Reservoir. View of Esopus creek at Olive Bridge dam site, showing coffer -dams and two lines of 8-foot steel pipes for carrying flow of creek. August 8, 1907." New York Public Library Digital Collections. Accessed January 28, 2025. https://digitalcollections.nypl.org/items/510d47da-dd22-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1918). Ashokan Reservoir. View of Esopus creek at Olive Bridge dam site, showing coffer -dams and two lines of 8-foot steel pipes for carrying flow of creek. August 8, 1907. Retrieved from https://digitalcollections.nypl.org/items/510d47da-dd22-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47da-dd22-a3d9-e040-e00a18064a99 | title=
(still image)
Ashokan Reservoir. View of Esopus creek at Olive Bridge dam site, showing coffer -dams and two lines of 8-foot steel pipes for carrying flow of creek. August 8, 1907., (1918)|author=Digital Collections, The New York Public Library |accessdate=January 28, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>