Oldest Dams in Connecticut

Connecticut has 685 dams with recorded construction dates. The oldest dates to 1677 — 349 years ago. Many of Connecticut'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	Hartford	1677	349 yrs	19	Significant	Satisfactory
2	Mill Pond Dam	Middlesex	1721	305 yrs	18	High	Fair
3	Nightingale Pond Dam	Windham	1722	304 yrs	6	Significant	Satisfactory
4	Podunk Pond Dam	Hartford	1730	296 yrs	15	Significant	Not Rated
5	Godfrey Pond Dam	Fairfield	1783	243 yrs	11	Significant	Fair
6	Wooley Pond Dam	Fairfield	1800	226 yrs	15	Significant	Satisfactory
7	Ashland Pond Dam	New London	1800	226 yrs	25	High	Satisfactory
8	Wilton Pond Dam	Litchfield	1810	216 yrs	15	Significant	Fair
9	Wheeler Pond Dam	New London	1810	216 yrs	20	Significant	Fair
10	Oxoboxo Lake Dam	New London	1810	216 yrs	26	High	Satisfactory
11	Upper Mill Pond Dam	Middlesex	1813	213 yrs	8	Low	Poor
12	Addison Pond Dam	Hartford	1820	206 yrs	18	Significant	Not Rated
13	Upper Millpond Dam	New London	1820	206 yrs	11	Significant	Satisfactory
14	Rogers Lake Dam	New London	1822	204 yrs	7	Significant	Satisfactory
15	Tankerhoosen Lake North Dam	Tolland	1830	196 yrs	16	Significant	Poor
16	Browns Brook Dam	Fairfield	1836	190 yrs	14	Significant	Fair
17	Upper Collinsville	Hartford	1837	189 yrs	18	Significant	Satisfactory
18	Hattertown Pond Dam	Fairfield	1840	186 yrs	11	Significant	Satisfactory
19	Moulsons Pond Dam	New London	1840	186 yrs	14	Significant	Not Rated
20	Glenville Pond Dam	Tolland	1842	184 yrs	19	Significant	Fair
21	Chalkers Millpond Dam	Middlesex	1845	181 yrs	5	Significant	Poor
22	Lake Beseck Dam	Middlesex	1846	180 yrs	34	Significant	Satisfactory
23	Acme Pond Dam	Windham	1846	180 yrs	16	High	Satisfactory
24	South Pond Dam	Litchfield	1850	176 yrs	21	High	Satisfactory
25	Crystal Lake Dam	Middlesex	1850	176 yrs	50	High	Poor
26	Rogers Pond Dam	Middlesex	1850	176 yrs	9	Significant	Satisfactory
27	Birch Mill Pond Dam	Middlesex	1850	176 yrs	9	Significant	Fair
28	Quonnipaug Lake Dam	New Haven	1850	176 yrs	5	Significant	Poor
29	Baldwins Pond Dam	New Haven	1850	176 yrs	24	Significant	Satisfactory
30	Orcutts Pond Dam	Tolland	1850	176 yrs	8	Significant	Not Rated
31	Staffordville Reservoir Dam	Tolland	1850	176 yrs	30	High	Satisfactory
32	Chamberlain Pond Dam	Windham	1850	176 yrs	12	Significant	Not Rated
33	Warren Pond Dam	Tolland	1852	174 yrs	22	High	Poor
34	Risley Reservoir Dam (no Longer Using 14605)	Tolland	1853	173 yrs	28	Significant	Fair
35	Deep Hollow Reservoir Dam	Middlesex	1854	172 yrs	28	Significant	Satisfactory
36	Brewster Pond Dam	New London	1854	172 yrs	13	Significant	Poor
37	East Lake Reservoir Dam	Fairfield	1855	171 yrs	47	High	Satisfactory
38	Northfield Pond Dam	Litchfield	1855	171 yrs	13	Significant	Satisfactory
39	Quinebaug	Windham	1855	171 yrs	14	Low	Satisfactory
40	Five Mile	Windham	1855	171 yrs	17	Significant	Satisfactory
41	Quassett Lake Road Dam	Windham	1855	171 yrs	14	Significant	Fair
42	Curtis Pond Dam	Fairfield	1856	170 yrs	15	Significant	Satisfactory
43	Lower Kohanza Lake Dam	Fairfield	1860	166 yrs	25	High	Satisfactory
44	Highland Lake Dam	Litchfield	1860	166 yrs	27	High	Fair
45	Big Meadow Pond A.k.a. Judd Pond Dam	Litchfield	1860	166 yrs	6	Significant	Satisfactory
46	Scovill Reservoir Dam	Middlesex	1860	166 yrs	21	High	Satisfactory
47	Kelsey Pond Dam	Middlesex	1860	166 yrs	10	Significant	Not Rated
48	Hidden Lake Dam	Middlesex	1860	166 yrs	13	Significant	Satisfactory
49	Pratt Read Dam	Middlesex	1860	166 yrs	11	Significant	Satisfactory
50	Upper Mill Pond Dam	Middlesex	1860	166 yrs	12	Significant	Fair

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