Tallest Dams in Wyoming

Wyoming has 1490 dams with recorded heights. The tallest is Seminoe Dam at 295 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	Seminoe Dam	Carbon	295	Concrete	Hydroelectric	High	1938
2	Alcova Dam	Natrona	265	Earth	Hydroelectric	High	1938
3	Kortes Dam	Carbon	244	Concrete	Hydroelectric	High	1951
4	Boysen Dam	Fremont	220	Earth	Flood Risk Reduction	High	1952
5	Pathfinder Dam	Natrona	214	Masonry	Hydroelectric	High	1909
6	Anchor Dam	Hot Springs	208	Concrete	Irrigation	High	1960
7	Greybull Valley (1st Enl.)	Park	207	Earth	Irrigation	High	2000
8	Glendo Dam	Platte	196	Earth	Flood Risk Reduction	High	1958
9	Meeks Cabin Dam	Uinta	185	Earth	Irrigation	High	1971
10	Keyhole Dam	Crook	168	Earth	Flood Risk Reduction	High	1952
11	High Savery	Carbon	165	Earth	Irrigation	High	2003
12	Lower Sunshine	Park	162	Earth	Irrigation	High	1972
13	Upper Sunshine	Park	160	Earth	Irrigation	High	1942
14	Rob Roy	Albany	150	Earth	Water Supply	High	1986
15	Fontenelle Dam	Lincoln	139	Earth	Fish and Wildlife Pond	High	1964
16	Guernsey Dam	Platte	137	Earth	Hydroelectric	High	1927
17	Buffalo Bill-diamond Creek Dike	Park	136	Earth	Fish and Wildlife Pond	High	1905
18	Laprele	Converse	135	Concrete	Irrigation	High	1909
19	Lake Desmet (north Dam)	Johnson	120	Earth	Water Supply	High	1975
20	Lake Desmet (south Dam)	Johnson	120	Earth	Water Supply	High	1975
21	Lake Desmet (a,b,c & Spillway Dikes)	Johnson	120	Earth	Water Supply	High	1975
22	Hog Park Main Dam	Carbon	118	Earth	Water Supply	High	1986
23	Grassy Lake Dam	Teton	118	Earth	Irrigation	High	1939
24	Tie Hack	Johnson	110	Concrete	Water Supply	High	1997
25	Pond 4 (dam 2)	Sweetwater	110	Earth	Irrigation	Significant	1992
26	Crystal Lake	Laramie	108	Concrete	Water Supply	High	1922
27	Muddy Guard No. 2 North Dam	Johnson	102	Earth	Irrigation	Significant	1976
28	Upper Rock Creek	Fremont	101	Earth	Other	Significant	1961
29	Upper Van Tassell	Laramie	98	Earth	Water Supply	High	1932
30	Jim Bridger Power Plant Surge Pond	Sweetwater	97	Earth	Water Supply	Significant	1989
31	22 - 36	Johnson	95	Earth	Irrigation	Low	2003
32	Grayrocks	Platte	95	Earth	Other	High	1980
33	Big Goose Park (3rd Enl.)	Sheridan	95	Earth	Irrigation	High	1958
34	Glendo Dike 3	Platte	94	Earth	Flood Risk Reduction	High	1959
35	Washakie	Fremont	93	Earth	Irrigation	High	1935
36	Twin Lakes No. 1	Sheridan	91	Earth	Water Supply	High	1998
37	Granite Springs	Laramie	90	Masonry	Water Supply	High	1904
38	Viva Naughton	Lincoln	90	Earth	Water Supply	High	1967
39	Lower Morgan	Campbell	88	Earth	Irrigation	Significant	2001
40	Units 1 and 2 Ash and Clear Water	Lincoln	88	Earth	Debris Control	Low	1994
41	Big Sandy Dam	Sweetwater	85	Earth	Flood Risk Reduction	High	1952
42	Lower Snake Draw (4th Enl.)	Sweetwater	85	Earth	Tailings	Significant	1998
43	Sulphur Creek	Uinta	85	Earth	Irrigation	High	1964
44	Jackson Lake Dam	Teton	84	Concrete	Flood Risk Reduction	High	1911
45	Bull Lake Dam	Fremont	81	Earth	Flood Risk Reduction	High	1938
46	Mcintosh No. 1	Fremont	80	Earth	Tailings	Low	1979
47	Dull Knife	Johnson	80	Earth	Irrigation	High	1966
48	Mcmurry No. 4	Natrona	78	Earth	Fish and Wildlife Pond	High	2014
49	Healy	Johnson	76	Earth	Irrigation	High	1975
50	Reeves No. 1	Park	75	Earth	Fish and Wildlife Pond	Low	1985

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