Tallest Dams in Rhode Island

Rhode Island has 222 dams with recorded heights. The tallest is Gainer Memorial at 189 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	Gainer Memorial	Providence	189	Earth	Water Supply	High	1926
2	Diamond Hill Reservoir	Providence	80	Earth	Water Supply	High	1971
3	James V Turner Reservoir	Providence	60	Earth	Recreation	High	1934
4	Lawton Valley Reservoir	Newport	48	Earth	Water Supply	High	1943
5	Woonsocket Reservoir # 1	Providence	47	Earth	Water Supply	High	1883
6	Harris Pond	Providence	40	Earth	Water Supply	High	1969
7	Stillwater Reservoir	Providence	39	Concrete	Fish and Wildlife Pond	High	1918
8	Watson, Harold E, Reservoir	Newport	38	Gravity	Water Supply	High	1960
9	Ocean State Power	Providence	36		Other	High
10	Slatersville Reservoir Upper	Providence	36	Masonry		High	1886
11	Georgiaville Pond	Providence	35	Gravity	Recreation	High	1882
12	Barden Reservoir	Providence	35	Masonry	Water Supply	Significant	1883
13	Almy Reservoir	Providence	33	Rockfill	Other	High	1865
14	Pawtucket Reservoir	Providence	33	Earth	Water Supply	High	1928
15	Valley Falls	Providence	31	Masonry	Hydroelectric	Low	1859
16	Olney Pond	Providence	30	Masonry	Recreation	High	1883
17	Sylvester Pond	Providence	29	Earth	Other	Low	1922
18	Curran Upper Reservoir	Providence	29	Earth	Fish and Wildlife Pond	High	1902
19	Arctic	Kent	28	Masonry	Other	High	1885
20	Limerock Reservoir	Providence	28	Earth	Other	High
21	Woonsocket Reservoir # 3	Providence	28	Gravity	Water Supply	High	1895
22	Pascoag Reservoir Upper	Providence	27		Recreation	High	1860
23	Slatersville Reservoir Middle	Providence	26	Masonry		High	1886
24	Ponaganset Reservoir	Providence	26	Earth	Water Supply	High	1865
25	Sprague Upper Reservoir	Providence	26	Rockfill	Recreation	High	1885
26	Factory Mutual Research Ctr Lower Pond	Providence	25	Earth	Other	Low	1948
27	Harris Pond	Kent	24	Rockfill	Other	Low	1882
28	Flat River Reservoir	Kent	24	Gravity	Recreation	High	1873
29	Hawkins Pond	Providence	24	Gravity	Recreation	High	1865
30	Centerville Pond	Kent	23		Other	High	1885
31	Arkwright Pond	Kent	22	Earth	Other	Low
32	Manville	Providence	22	Masonry		Low	1860
33	Hughesdale Pond Upper	Providence	22	Earth	Other	High
34	Harrisville Pond	Providence	22	Rockfill	Recreation	High	1854
35	Jordan Pond	Providence	22	Earth	Water Supply	Significant
36	Mill Pond	Kent	21	Gravity	Other	Significant	1800
37	Royal Mills Dam	Kent	21	Gravity	Hydroelectric	High	1861
38	Wilson Reservoir	Providence	21	Gravity	Recreation	High	1866
39	Albion	Providence	21	Masonry		Low	1850
40	Coomer Lake	Providence	21	Rockfill	Recreation	Significant	1885
41	Canada Upper Pond	Providence	21	Earth	Other	Significant	1915
42	Boone Lake	Washington	21	Masonry	Recreation	High	1885
43	Gardiner Pond	Newport	20	Rockfill	Water Supply	High	1885
44	Pratt	Providence	20			Low
45	Forestdale Pond	Providence	20			High	1883
46	Shoestring Mill	Providence	20			Significant
47	Ashton	Providence	20	Masonry		Low	1885
48	Barney Pond	Providence	20	Masonry	Recreation	High	1885
49	Oak Swamp Reservoir	Providence	20	Masonry	Recreation	High	1865
50	Bucklin Point	Providence	20			High	1950

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