Tallest Dams in New Jersey

New Jersey has 821 dams with recorded heights. The tallest is Merrill Creek Main Dam at 280 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	Merrill Creek Main Dam	Warren	280	Earth	Other	High	1988
2	Round Valley South Dam	Hunterdon	178	Earth	Water Supply	High	1961
3	Monksville Dam	Passaic	150	Other	Water Supply	High	1986
4	Round Valley North Dam	Hunterdon	135	Earth	Water Supply	High	1961
5	Boonton Dam	Morris	120	Masonry	Water Supply	High	1905
6	Raymond Dam	Passaic	103	Earth	Water Supply	High	1928
7	Charlotteburg Dam	Morris	102	Concrete	Water Supply	High	1961
8	Spruce Run Reservoir Dam	Hunterdon	93	Earth	Water Supply	High	1964
9	Round Valley Dike	Hunterdon	80	Earth	Water Supply	High	1961
10	Clyde Potts Reservoir Dam	Morris	80	Earth	Water Supply	High	1932
11	Great Notch Reservoir Dam	Passaic	74	Earth	Water Supply	High	1898
12	Canistear Reservoir #1 Dam	Sussex	70	Earth	Water Supply	High	1896
13	Yards Creek Upper - Main Dam	Warren	70	Rockfill	Hydroelectric	High	1965
14	Round Valley P&f Dike	Hunterdon	68	Earth	Water Supply	Low
15	Glendola Reservoir Dam	Monmouth	65	Earth	Water Supply	High	1961
16	Green Swamp #4 Dam	Passaic	65	Concrete	Water Supply	High	1925
17	Green Swamp #2 Dam	Passaic	65	Concrete	Water Supply	High	1925
18	Midvale Dam	Passaic	61	Earth	Water Supply	High	1928
19	Oak Ridge Reservoir Dam	Passaic	60	Earth	Water Supply	High	1892
20	Canoe Brook Reservoir #3 Dam	Essex	57	Earth	Water Supply	High	1956
21	Clinton Reservoir Dam	Passaic	56	Earth	Water Supply	High	1894
22	Cedar Grove West Res Dam	Essex	55	Earth	Water Supply	High	1903
23	Point View Dam	Passaic	55	Earth	Recreation	High	1964
24	Furnace Brook W.s. #2 Dam	Warren	55	Earth	Flood Risk Reduction	High	1971
25	Yards Creek Lower - Main Dam	Warren	55	Earth	Hydroelectric	High	1965
26	Manasquan Reservoir Dam	Monmouth	53	Earth	Water Supply	High	1990
27	Trenton Reservoir Dam	Mercer	52	Earth	Water Supply	High	1899
28	Yards Creek Upper - West Dike	Warren	52	Rockfill	Hydroelectric	High	1965
29	Cedar Grove South Res Dam	Essex	51	Earth	Water Supply	High	1903
30	Cedar Grove North Res Dam	Passaic	51	Earth	Water Supply	High	1903
31	Swimming River Reservoir Dam	Monmouth	45	Earth	Water Supply	High	1901
32	Ravine Lake Dam	Somerset	45	Rockfill	Recreation	High	1899
33	Canistear Reservoir #2 Dam	Sussex	44	Masonry	Water Supply	High	1896
34	Lake Solitude Dam	Hunterdon	42	Earth	Recreation	High
35	Pines Lake Dam	Passaic	42	Concrete	Recreation	High	1927
36	Wolf Den Dam	Passaic	42	Concrete	Recreation	High	1927
37	Canoe Brook Reservoir #3 Dike	Essex	40	Earth	Water Supply	High	1956
38	New Jersey No Name # 32 Dam	Hunterdon	40	Earth	Recreation	Significant
39	Highland Lake Dam	Passaic	40	Stone	Recreation	High	1947
40	Split Rock Pond Dam	Morris	39	Concrete	Water Supply	High	1948
41	West Branch Reservoir Dam	Somerset	39	Earth	Recreation	High	1930
42	Merrill Creek Res. Se Dike	Warren	39	Earth	Other	High
43	Woodcliff Lake Dam	Bergen	38	Earth	Water Supply	High	1906
44	Warren Mill Dam	Hunterdon	38	Earth	Water Supply	High	1916
45	Assunpink #18 Dam	Monmouth	38	Earth	Flood Risk Reduction	High
46	Hackettstown Res. Dam	Morris	38	Concrete	Water Supply	High
47	Assunpink #19 Dam	Monmouth	36	Earth	Recreation	Significant
48	Mt. Kemble Lake Dam	Morris	36	Earth	Recreation	Significant	1928
49	Union Lake Dam	Cumberland	35	Earth	Recreation	High	1869
50	Hunterdon Learning Center Dam	Hunterdon	35	Earth	Recreation	Low	1971

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