Tallest Dams in Massachusetts

Massachusetts has 1291 dams with recorded heights. The tallest is Cobble Mountain Reservoir Dam at 245 feet. Taller dams impound more water and carry greater potential energy, which is why height is a key factor in hazard classification and inspection requirements.

#	Dam	County	Height (ft)	Type	Purpose	Hazard	Year
1	Cobble Mountain Reservoir Dam	Hampden	245	Earth	Water Supply	High	1930
2	Quabbin Winsor Dam	Hampshire	170	Earth	Water Supply	High	1939
3	Knightville Dam	Hampshire	150	Rockfill	Flood Risk Reduction	High	1941
4	Northfield Mt. - Main Dam	Franklin	145	Rockfill	Hydroelectric	High	1973
5	Quabbin Goodnough Dike	Hampshire	135	Earth	Water Supply	High	1938
6	Fife Brook	Franklin	130	Rockfill	Hydroelectric	High	1974
7	Tighe Carmody Reservoir Dam	Hampshire	130	Earth	Water Supply	High	1955
8	Wachusett Reservoir Dam	Worcester	114	Stone	Water Supply	High	1906
9	Sherman	Franklin	110	Other	Hydroelectric	High	1927
10	Farnham Reservoir Dam	Berkshire	105	Concrete	Water Supply	High	1910
11	Clam Lake Dam	Berkshire	97	Earth	Flood Risk Reduction	High	1977
12	Granville Reservoir Dam	Hampden	85	Earth	Water Supply	High	1930
13	Wachusett Reservoir North Dike	Worcester	85	Earth	Water Supply	High	1904
14	Lovell Reservoir Dam	Worcester	84	Earth	Water Supply	High	1929
15	Francis P. Ryan Dam	Franklin	80	Earth	Water Supply	High	1970
16	Conway Electric Dam	Franklin	77	Earth	Recreation	Low	1898
17	Borden Brook Reservoir Dam	Hampden	77	Earth	Water Supply	High	1909
18	Sudbury Reservoir Dam	Worcester	77	Earth	Water Supply	High	1899
19	Upper Sackett Reservoir Dam	Berkshire	76	Earth	Water Supply	High	1947
20	North Silver Lake Dam	Berkshire	76	Earth	Flood Risk Reduction	High
21	Deerfield No. 2	Franklin	76	Concrete	Hydroelectric	Low	1913
22	Westville Dam	Worcester	72	Rockfill	Flood Risk Reduction	High	1962
23	Cleveland Brook Reservoir Dam	Berkshire	71	Earth	Water Supply	High	1949
24	Moose Hill Reservoir Dam	Worcester	71	Earth	Flood Risk Reduction	High	1980
25	Pine Hill Reservoir Dam	Worcester	70	Concrete	Water Supply	High	1924
26	Barre Falls Dam	Worcester	69	Rockfill	Flood Risk Reduction	High	1958
27	Conway Reservoir Dam	Franklin	65	Earth	Water Supply	High	1975
28	Notch Reservoir Dam	Berkshire	64	Earth	Water Supply	High	1897
29	Schoolhouse Lake Dam	Berkshire	63	Earth	Flood Risk Reduction	High	1986
30	Lynde Brook Reservoir Dam	Worcester	61	Earth	Water Supply	High	1876
31	Black Brook Pl-566 Flood Control Dam	Hampden	60	Earth	Water Supply	High	1971
32	Cohasse Brook Reservoir Dam	Worcester	60	Earth	Water Supply	High	1967
33	Upper Glen Reservoir Dam	Franklin	59	Concrete	Water Supply	Significant	1904
34	Intake Dam	Hampden	59	Concrete	Water Supply	Low	1909
35	Ashland Reservoir Dam	Middlesex	59	Earth	Recreation	High	1900
36	Tully Dam	Worcester	59	Rockfill	Flood Risk Reduction	High	1949
37	Arm Brook Pl-566 Flood Control Dam	Hampden	58	Earth	Flood Risk Reduction	High	1963
38	Hopkinton Reservoir Dam	Middlesex	58	Earth	Recreation	High	1891
39	Leahey (upper) Reservoir Dam And Dike	Berkshire	57	Earth	Water Supply	High	1965
40	Holden Reservoir Dam No. 2	Worcester	57	Earth	Water Supply	High	1900
41	Prospect Hill Reservoir Dam	Bristol	54	Earth	Water Supply	Significant	1956
42	Dykes Meadow Dam	Essex	54	Earth	Water Supply	Significant	1894
43	East Brimfield Dam	Worcester	53	Rockfill	Flood Risk Reduction	High	1960
44	Eclipse Dam	Berkshire	52	Stone	Flood Risk Reduction	High	1890
45	Lower Van Horn Reservoir Dam	Hampden	52	Earth	Recreation	High	1848
46	Windsor Reservoir Dam	Berkshire	51	Earth	Water Supply	High	1865
47	White Reservoir Dam	Hampshire	51	Masonry		Significant	1912
48	Bickford Pond Dam	Worcester	51	Earth	Water Supply	High	1971
49	Mill Pond Dam	Middlesex	50	Earth	Water Supply	High	1973
50	Perley Brook Reservoir Dam	Worcester	50	Earth	Water Supply	High	1962

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