Oldest Dams in New Jersey

New Jersey has 495 dams with recorded construction dates. The oldest dates to 1684 — 342 years ago. Many of New Jersey'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	Magnolia Lake Dam	Cape May	1684	342 yrs	8	Significant	Poor
2	Bargaintown Mill Pond Dam	Atlantic	1718	308 yrs	10	Significant	Fair
3	Openaka Lake Dam	Morris	1750	276 yrs	20	Significant	Poor
4	Johnson Pond Dam	Cape May	1759	267 yrs	10	Significant	Poor
5	Beaver Lake Dam	Sussex	1770	256 yrs	12	Low	Satisfactory
6	Rainbow Lake Dam	Salem	1774	252 yrs	20	Significant	Fair
7	Braddocks Mill Dam	Burlington	1790	236 yrs	16	Significant	Poor
8	East Creek Pond Dam	Cape May	1800	226 yrs	11	Significant	Fair
9	Indian Mills Dam	Burlington	1807	219 yrs	11	Significant	Fair
10	Hobb Lake Dam	Camden	1828	198 yrs	12	Significant	Poor
11	New Market Pond Dam	Middlesex	1830	196 yrs	7	Significant	Satisfactory
12	Brainerd Lake Dam	Middlesex	1840	186 yrs	13	Significant	Satisfactory
13	Great Falls	Passaic	1840	186 yrs	12	Low	Satisfactory
14	Oldham Pond Dam	Passaic	1849	177 yrs	18	High	Satisfactory
15	Frenches Pond Dam	Sussex	1850	176 yrs	13	High	Satisfactory
16	Dundee	Passaic	1854	172 yrs	16	Low	Satisfactory
17	Union Lake Dam	Cumberland	1869	157 yrs	35	High	Poor
18	Breakneck Dam	Burlington	1870	156 yrs	14	Significant	Satisfactory
19	Lake Estling Dam	Morris	1870	156 yrs	19	High	Poor
20	Lake Carasaljo Dam	Ocean	1870	156 yrs	16	High	Fair
21	Holstein Lake Dam	Morris	1875	151 yrs	15	Low
22	Lambertville #2 Dam	Hunterdon	1877	149 yrs	17	High	Satisfactory
23	Lake Lenape Dam	Atlantic	1879	147 yrs	29	High	Poor
24	Mirror Lake Dam	Burlington	1880	146 yrs	18	High	Satisfactory
25	Canoe Brook Dam	Essex	1880	146 yrs	9	Low	Poor
26	Cedar Run Dam	Ocean	1880	146 yrs	9	Low	Not Rated
27	Oxycocus East Dike #1	Ocean	1880	146 yrs	12	Low	Not Rated
28	Kettle Run Dam	Burlington	1885	141 yrs	14	Low	Fair
29	Sheppards Mill Pond Dam	Cumberland	1885	141 yrs	18	Low	Satisfactory
30	Barbours Pond Dam	Passaic	1888	138 yrs	20	Significant	Fair
31	Tennents Brook Dam	Middlesex	1890	136 yrs	9	Low	Satisfactory
32	Washington Forge Pond Dam	Morris	1890	136 yrs	10	Significant	Satisfactory
33	Barbour Mill Dam	Passaic	1890	136 yrs	13	Significant	Poor
34	Cold Spring Lake Dam	Passaic	1890	136 yrs	16	Significant	Satisfactory
35	Vincentown Mill Dam	Burlington	1891	135 yrs	12	High	Satisfactory
36	Macopin Reservoir Dam	Morris	1892	134 yrs	34	High	Poor
37	Oak Ridge Reservoir Dam	Passaic	1892	134 yrs	60	High	Poor
38	Clinton Reservoir Dam	Passaic	1894	132 yrs	56	High	Fair
39	Morris Lake Dam	Sussex	1895	131 yrs	19	High	Satisfactory
40	Paulina Lake Dam	Warren	1895	131 yrs	13	Significant	Poor
41	Mine Hill Reservoir Dam	Morris	1896	130 yrs	30	Significant	Poor
42	Canistear Reservoir #2 Dam	Sussex	1896	130 yrs	44	High	Fair
43	Canistear Reservoir #1 Dam	Sussex	1896	130 yrs	70	High	Fair
44	Kampfe Lake Dam	Passaic	1897	129 yrs	13	High	Satisfactory
45	Longwood Lake Dam	Morris	1898	128 yrs	22	High	Poor
46	Keswick Grove Lower Dam	Ocean	1898	128 yrs	8	Low	Satisfactory
47	Upper Keswick Dam	Ocean	1898	128 yrs	12	Significant	Satisfactory
48	Great Notch Reservoir Dam	Passaic	1898	128 yrs	74	High	Satisfactory
49	Campbells Pond Dam	Essex	1899	127 yrs	22	Significant	Poor
50	Trenton Reservoir Dam	Mercer	1899	127 yrs	52	High	Fair

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