Oldest Dams in Wyoming

Wyoming has 1453 dams with recorded construction dates. The oldest dates to 1892 — 134 years ago. Wyoming'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	Brownlee	Carbon	1892	134 yrs	15	Low	Poor
2	Cross & Cruse Creek Ditch Co.	Johnson	1895	131 yrs	15	Low	Poor
3	Treichler & Parsons	Sheridan	1895	131 yrs	27	Low	Poor
4	Okie	Fremont	1898	128 yrs	26	Significant	Poor
5	Nicolaysen	Natrona	1899	127 yrs	22	Significant	Fair
6	Wheatland No. 2	Albany	1901	125 yrs	37	Significant	Fair
7	Maxwell	Sheridan	1901	125 yrs	30	Low	Poor
8	Antwerp	Sheridan	1902	124 yrs	20	Low	Poor
9	Piedmont	Uinta	1902	124 yrs	34	Low	Poor
10	Burns M. G.	Albany	1903	123 yrs	14	Low	Fair
11	J. N. Mertz	Platte	1903	123 yrs	13	Low	Poor
12	Three Mile	Albany	1904	122 yrs	18	Low	Fair
13	Kinney	Carbon	1904	122 yrs	20	Low	Poor
14	Hughes	Goshen	1904	122 yrs	16	Low	Poor
15	Granite Springs	Laramie	1904	122 yrs	90	High	Fair
16	Chas Smith	Converse	1905	121 yrs	28	Low	Poor
17	Rigbys	Fremont	1905	121 yrs	8	Low	Fair
18	Stonebridge	Park	1905	121 yrs	24	Significant	Fair
19	Buffalo Bill-diamond Creek Dike	Park	1905	121 yrs	136	High	Not Available
20	Buffalo Bill-north Fork Dike	Park	1905	121 yrs	30	Low	Not Available
21	Mertz No. 2	Platte	1905	121 yrs	19	Low	Poor
22	Havens	Crook	1906	120 yrs	16	Low	Poor
23	Little Willow	Goshen	1906	120 yrs	10	Low	Poor
24	Huntington	Sheridan	1906	120 yrs	22	Low	Poor
25	Dome Lake	Sheridan	1906	120 yrs	8	Low	Fair
26	Cardwell	Carbon	1907	119 yrs	35	Low	Poor
27	Swan	Laramie	1907	119 yrs	25	Significant	Poor
28	One Mile	Laramie	1907	119 yrs	35	Significant	Poor
29	Hay	Sweetwater	1907	119 yrs	18	Low	Poor
30	Eden West Dike	Sweetwater	1907	119 yrs	25	Low	Not Available
31	Paterson Lake	Uinta	1907	119 yrs	14	Significant	Poor
32	Upton	Weston	1907	119 yrs	30	Low	Fair
33	James Lake	Albany	1908	118 yrs	40	Low	Poor
34	Stone No. 1	Campbell	1908	118 yrs	9	Low
35	Gillette	Campbell	1908	118 yrs	10	Low	Fair
36	Point Of Rocks	Carbon	1908	118 yrs	8	Low	Poor
37	Ver Plancke	Carbon	1908	118 yrs	37	Significant	Fair
38	Higgins No. 2	Converse	1908	118 yrs	20	Low	Poor
39	Lewis	Laramie	1908	118 yrs	26	Low	Fair
40	Gothberg	Natrona	1908	118 yrs	13	Significant	Poor
41	Bucknum	Natrona	1908	118 yrs	23	Low	Poor
42	Darrah No. 3	Park	1908	118 yrs	20	Low	Fair
43	Swan Creek No. 2	Park	1908	118 yrs	15	Low	Poor
44	Corbett Diversion Dam	Park	1908	118 yrs	18	Low	Not Available
45	Hart Enlargement Of Tippacanoe No. 1	Park	1908	118 yrs	12	Low	Poor
46	Verona	Sheridan	1908	118 yrs	55	Low	Poor
47	Lone Tree No. 2	Albany	1909	117 yrs	7	Low	Fair
48	Stephenson	Carbon	1909	117 yrs	9	Low	Poor
49	Hannah Mahoney No. 2	Carbon	1909	117 yrs	22	Low	Fair
50	Laprele	Converse	1909	117 yrs	135	High	Unsatisfactory

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