Oldest Dams in New York

New York has 1680 dams with recorded construction dates. The oldest dates to 1783 — 243 years ago. Many of New York's oldest dams were built as colonial-era mill dams, powering early industry along rivers and streams. Older dams require particular attention for safety, as many were built before modern engineering standards.

#	Dam	County	Year Built	Age	Height (ft)	Hazard	Condition
1	Mill Pond Dam	Orange	1783	243 yrs	17	Low	Not assessed
2	Nassau Lake Dam	Rensselaer	1792	234 yrs	10	Significant	Poor
3	Mill Street Dam	Cayuga	1800	226 yrs	25	High	Satisfactory
4	Hathaway Pond Dam	Delaware	1800	226 yrs	18	Low	Not assessed
5	Cranberry Pond Dam	Rensselaer	1800	226 yrs	7	Low	Not assessed
6	Potake Lake Dam	Rockland	1800	226 yrs	22	High	Satisfactory
7	Lefferts Grist Mill Dam	Suffolk	1800	226 yrs	8	Low	Not assessed
8	Cooper Lake Dam and West Dike	Ulster	1800	226 yrs	40	High	Satisfactory
9	Mayham Pond Dam	Schoharie	1813	213 yrs	11	Low	Not assessed
10	Cossayuna Lake Outlet Dam	Washington	1815	211 yrs	10	Low	Not assessed
11	Silver Lake Dam	Westchester	1815	211 yrs	9	Significant	Poor
12	Findley Lake Dam	Chautauqua	1820	206 yrs	10	Low	Not assessed
13	Kasoag Lake Dam	Oswego	1820	206 yrs	10	Low	Poor
14	Fox Vly Dam	Schoharie	1820	206 yrs	8	Low	Not assessed
15	Beaver Dam Pond Dam	Sullivan	1820	206 yrs	19	Significant	Satisfactory
16	New Mill Pond Dam	Suffolk	1825	201 yrs	15	Low	Not assessed
17	Plymouth Reservoir Dam	Chenango	1827	199 yrs	12	Significant	Satisfactory
18	Guilford Lake Dam	Chenango	1827	199 yrs	15	High	Poor
19	Briscoe Lake Dam	Sullivan	1828	198 yrs	11	Low	Not assessed
20	East Florence Dam	Oneida	1835	191 yrs	9	Low	Not assessed
21	Drew Lake Dam	Putnam	1835	191 yrs	13	Low	Not assessed
22	Leland Pond Dam	Madison	1836	190 yrs	15	Significant	Fair
23	Hatch Lake Dam	Madison	1836	190 yrs	11	Low	Not assessed
24	Kingsley Brook Reservoir Dam	Madison	1836	190 yrs	63	High	Fair
25	Lake Moraine Dam	Madison	1836	190 yrs	56	High	Poor
26	Lake Delaware Dam	Delaware	1840	186 yrs	9	Low	Not assessed
27	Carterville Dam	Oswego	1840	186 yrs	14	Low	Not assessed
28	New York State Dam	Saratoga	1840	186 yrs	21	Low	Satisfactory
29	Woodlands Lake Dam	Westchester	1840	186 yrs	20	Significant	Not assessed
30	Kenoza Lake Dam	Sullivan	1843	183 yrs	13	Low	Not assessed
31	Yankee Lake Dam	Sullivan	1844	182 yrs	22	High	Satisfactory
32	Mine Lake	Orange	1845	181 yrs	22	Significant	Poor
33	Annandale Dam	Dutchess	1846	180 yrs	11	Significant	Poor
34	Clarke Pond Dam	Otsego	1847	179 yrs	14	Low	Not assessed
35	Rensselaer Lake Dam	Albany	1850	176 yrs	30	High	Poor
36	Lime Lake Outlet Dam	Cattaraugus	1850	176 yrs	12	Significant	Not assessed
37	New Hope Saw Mill Dam	Cayuga	1850	176 yrs	19	Significant	Poor
38	Whaley Lake Dam	Dutchess	1850	176 yrs	19	High	Satisfactory
39	North Lake B Dam	Herkimer	1850	176 yrs	35	High	Not assessed
40	North Lake C Dam	Herkimer	1850	176 yrs	27	High	Satisfactory
41	North Lake a Dam (spillway)	Herkimer	1850	176 yrs	15	Low	Not assessed
42	Chittenango Creek Dam	Madison	1850	176 yrs	10	Low	Not assessed
43	Erieville Reservoir Dam	Madison	1850	176 yrs	55	High	Fair
44	Alder Pond	Oneida	1850	176 yrs	15	High	Satisfactory
45	Snooks Ice Pond Dam	Onondaga	1850	176 yrs	15	Low	Not assessed
46	Phillips Mill Pond Dam	Suffolk	1850	176 yrs	10	Significant	Poor
47	Stephen Crane Dam	Sullivan	1850	176 yrs	15	Low	Not assessed
48	Silver Lake Dam	Sullivan	1850	176 yrs	14	Significant	Not assessed
49	Eddyville Dam	Ulster	1850	176 yrs	12	Low	Not assessed
50	Tivoli Lake Dam	Albany	1851	175 yrs	9	Low	Not assessed

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