Oldest Dams in Wisconsin

Wisconsin has 908 dams with recorded construction dates. The oldest dates to 1812 — 214 years ago. Wisconsin's earliest dams were built in the 19th century, an era of westward expansion, irrigation development, and early water infrastructure. 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	New Richmond Mills	St. Croix	1812	214 yrs	19	High	Satisfactory
2	Lake Geneva	Walworth	1836	190 yrs	14	Low	Satisfactory
3	Saratoga Mill	Waukesha	1836	190 yrs	10	Low	Fair
4	Wambold	Waukesha	1836	190 yrs	12	Significant	Fair
5	Blott	Waukesha	1837	189 yrs	12	High	Fair
6	Fox Lake	Dodge	1838	188 yrs	16	Low	Fair
7	Rome	Jefferson	1838	188 yrs	11	High	Satisfactory
8	Old Stone Mill	Walworth	1839	187 yrs	17	High	Fair
9	Neosho	Dodge	1840	186 yrs	12	Low	Fair
10	Upper Beaver Dam	Dodge	1840	186 yrs	20	High	Satisfactory
11	Schrauths Mill	Fond du Lac	1840	186 yrs	13	Low	Fair
12	Lake Beulah	Walworth	1840	186 yrs	14	High	Fair
13	Lauderdale Lakes	Walworth	1840	186 yrs	14	High	Fair
14	Peacock	Waukesha	1840	186 yrs	11	Significant	Satisfactory
15	Merton Rolling Mill	Waukesha	1840	186 yrs	10	High	Fair
16	Jefferson	Jefferson	1842	184 yrs	11	Low	Satisfactory
17	Thiensville	Ozaukee	1842	184 yrs	13	Low	Fair
18	Pewaukee	Waukesha	1842	184 yrs	14	High	Satisfactory
19	Wisconsin Rapids	Wood	1843	183 yrs	34	Low	Satisfactory
20	Spring Lake	Jefferson	1844	182 yrs	17	High	Fair
21	Hartford	Washington	1844	182 yrs	14	Low	Fair
22	Monches	Waukesha	1844	182 yrs	14	Low	Fair
23	Hustisford	Dodge	1845	181 yrs	11	Low	Satisfactory
24	Albany	Green	1845	181 yrs	13	Low	Fair
25	Lawrence Lake	Marquette	1845	181 yrs	35	Low	Fair
26	Ogdensburg	Waupaca	1845	181 yrs	7	High	Satisfactory
27	Mishicot	Manitowoc	1846	180 yrs	11	Low	Satisfactory
28	North Dike At Stevens Point	Portage	1846	180 yrs	9	High	Satisfactory
29	Hingham	Sheboygan	1846	180 yrs	11	Low	Fair
30	Dassow Milling Company	Sheboygan	1846	180 yrs	13	Low	Fair
31	West Bend	Washington	1846	180 yrs	13	Low	Fair
32	Barton	Washington	1846	180 yrs	14	High	Satisfactory
33	Upper Mayville	Dodge	1848	178 yrs	15	Low	Satisfactory
34	Furnace Bridge	Dodge	1848	178 yrs	14	Significant	Fair
35	Kingston	Green Lake	1848	178 yrs	16	High	Fair
36	Boltonville	Washington	1848	178 yrs	12	Low	Fair
37	Monterey	Waukesha	1848	178 yrs	16	Low	Satisfactory
38	Mukwonago	Waukesha	1848	178 yrs	10	Low	Satisfactory
39	Wyocena	Columbia	1849	177 yrs	14	Low	Satisfactory
40	Cambria	Columbia	1849	177 yrs	28	High	Satisfactory
41	Pardeeville	Columbia	1849	177 yrs	16	High	Satisfactory
42	Mendota Locks	Dane	1849	177 yrs	16	High	Satisfactory
43	Brodhead	Green	1849	177 yrs	10	Low	Fair
44	Oxford	Marquette	1849	177 yrs	25	Low	Satisfactory
45	Prairie Farm	Barron	1850	176 yrs	16	Low	Fair
46	Chilton	Calumet	1850	176 yrs	13	High	Satisfactory
47	Danville	Dodge	1850	176 yrs	17	Low	Fair
48	Necedah	Juneau	1850	176 yrs	20	Low	Satisfactory
49	Brooks And Ross	Marathon	1850	176 yrs	12	Low	Satisfactory
50	Briggsville	Marquette	1850	176 yrs	14	High	Satisfactory

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