Hydroelectric Dams in New Hampshire

New Hampshire has 97 hydroelectric dams, of which 20 carry a high hazard classification. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity.

#	Dam	County	Height (ft)	Hazard	Condition	Year
1	Comerford	Grafton	170	High	Satisfactory	1930
2	Moore	Grafton	149	High	Satisfactory	1957
3	Ayers Island	Grafton	80	Significant	Satisfactory	1924
4	Gregg Falls	Hillsborough	66	High	Satisfactory	1917
5	Minnewawa	Cheshire	63	High	Satisfactory	1923
6	Wilder	Grafton	59	High	Satisfactory	1950
7	Vernon	Cheshire	58	Low	Satisfactory	1909
8	Cascade	Coos	57	High	Fair	1903
9	First Connecticut Lake Dam	Coos	56	High	Fair	1930
10	Bellows Falls	Cheshire	48	Low	Satisfactory	1907
11	Jackman Reservoir Dam	Hillsborough	43	High	Poor	1926
12	Eastman Falls	Merrimack	43	Significant	Satisfactory	1937
13	Campton Pond Hydro Dam	Grafton	39	High	Fair	1890
14	Gilman	Coos	38	Low	Satisfactory	1898
15	Lower Great Falls	Strafford	36	Significant	Satisfactory	1984
16	Jackson Mills	Hillsborough	33	Significant	Satisfactory	1920
17	Sweetwater	Sullivan	33	Significant	Satisfactory	1922
18	Lower Valley	Sullivan	33	Significant	Satisfactory	1921
19	J. Brodie Smith	Coos	31	High	Satisfactory	1948
20	Kelley's Falls Dam	Hillsborough	31	High	Poor	1916
21	Amoskeag	Hillsborough	29	High	Fair	1921
22	China Mill Dam	Merrimack	29	High	Fair	1860
23	Second Connecticut Lake Dam	Coos	28	Low	Fair	1849
24	Cheshire Mills	Cheshire	27	Significant	Satisfactory	1886
25	Otis Falls	Hillsborough	27	Significant	Satisfactory	1982
26	Clement Dam	Belknap	26	Significant	Not Rated	1901
27	Pembroke	Merrimack	26	Low	Satisfactory	1891
28	Goodrich Falls Dam	Carroll	25	Low	Not Rated	1935
29	Errol	Coos	25	Low	Satisfactory	1887
30	Cross Power	Coos	25	High	Satisfactory	1903
31	Mcindoes	Grafton	25	Low	Satisfactory	1931
32	Verney Mill Hydro Dam	Hillsborough	25	High	Not Rated	1916
33	Gorham	Coos	24	Low	Satisfactory	1904
34	Apthorp	Grafton	24	Significant	Satisfactory	1936
35	Penacook Upper Falls	Merrimack	23	Low	Satisfactory	1987
36	Rivermill Mascoma Hydro Dam	Grafton	22	High	Poor	1920
37	Hillsborough Mill	Hillsborough	22	Significant	Fair	1925
38	Monadnock	Hillsborough	22	Low	Satisfactory	1923
39	Webster	Merrimack	22	Significant	Satisfactory	1917
40	Stevens Mill	Merrimack	22	Significant	Satisfactory	1930
41	Riverside	Coos	21	Low	Satisfactory	1970
42	Baltic Mills Dam	Grafton	21	Low	Not Rated	1919
43	Powder Mill	Hillsborough	21	Low	Satisfactory	1924
44	Fiske Mill Hydro Dam	Cheshire	20	Low	Not Rated	1922
45	Gorham	Coos	20	Low	Satisfactory	1958
46	Weston	Coos	20	Low	Satisfactory	1987
47	Hadley Falls	Hillsborough	20	Significant	Satisfactory	1922
48	Franklin Falls Hydro Dam 2	Merrimack	20	Significant	Not Rated	1888
49	Hatfields	Strafford	20	Significant	Satisfactory	1937
50	Rollinsford	Strafford	20	Significant	Satisfactory	1910
51	Canaan	Coos	19	Low	Satisfactory	1927
52	Brooklyn	Coos	19	Significant	Unsatisfactory	1919
53	Spaulding Pond Dam	Strafford	19	Low	Satisfactory	1899
54	Cheshire Mills Lower Dam	Cheshire	18	High	Poor	1848
55	Ashuelot Paper Mill Dam	Cheshire	18	Low	Not Rated	1910
56	Lower Robertson	Cheshire	18	Low	Satisfactory	1905
57	Lower Lisbon	Grafton	18	Low	Satisfactory	1986
58	Dodge Falls	Grafton	18	Low	Satisfactory	1905
59	Waterloom Falls	Hillsborough	18	Low	Satisfactory	1980
60	Garvins Falls	Merrimack	18	Low	Satisfactory	1901
61	Giles Pond	Merrimack	18	Low	Satisfactory	1904
62	South Berwick	Strafford	18	Low	Satisfactory	1923
63	Sugar River I	Sullivan	18	Significant	Satisfactory	1928
64	Shelburne	Coos	17	Low	Satisfactory	1906
65	Squam Lake	Grafton	17	High	Satisfactory	1856
66	Ammonoosuc River	Grafton	17	Low	Satisfactory	1900
67	Glen Road	Grafton	17	Significant	Satisfactory	1988
68	Briar Pipe	Merrimack	17	Low	Satisfactory	1936
69	Somersworth	Strafford	17	Significant	Satisfactory	1929
70	Grist Mill Pond Dam	Grafton	16	High	Poor	1924
71	Mine Falls	Hillsborough	16	Low	Satisfactory	1889
72	Sawmill	Coos	15	Low	Satisfactory	1965
73	Pontook	Coos	15	Low	Satisfactory	1909
74	Union Street	Hillsborough	15	Significant	Satisfactory	1916
75	Penacook Lower Falls Diversion	Merrimack	15	Low	Satisfactory	1982
76	Allied Leather Auxiliary	Merrimack	15	Low	Satisfactory	1982
77	South Milton	Strafford	15	Low	Satisfactory	1893
78	Sunapee	Sullivan	15	Significant	Satisfactory	1856
79	Beech River Mill Dam	Carroll	14	High	Poor	1851
80	Noone Mills	Hillsborough	14	Significant	Satisfactory	1938
81	Steels Pond	Hillsborough	14	Significant	Satisfactory	1909
82	Hoague - Sprague	Merrimack	14	Significant	Satisfactory	1906
83	Avery	Belknap	13	Low	Satisfactory	1947
84	Cheshire	Cheshire	13	Low	Satisfactory	1939
85	Woodsville	Grafton	12	Significant	Satisfactory	1827
86	Pierce	Hillsborough	12	Low	Satisfactory	1921
87	Watson	Strafford	12	Low	Satisfactory	1900
88	Lochmere	Belknap	11	Low	Satisfactory	1910
89	Hooksett	Merrimack	11	Low	Satisfactory	1927
90	Lakeport	Belknap	10	Significant	Satisfactory	1958
91	York	Merrimack	10	Low	Satisfactory	1967
92	Hopkinton	Merrimack	10	Low	Satisfactory	1890
93	Boston Felt	Strafford	10	Low	Satisfactory	1983
94	Sugar River Ii	Sullivan	10	Significant	Satisfactory	2009
95	Paper Mill	Hillsborough	9	Low	Satisfactory	1922
96	Cocheco Falls	Strafford	9	Significant	Satisfactory	1930
97	Star Lake Dam	Sullivan	7	Low	Satisfactory	1920

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