Tallest Dams in Oregon

Oregon has 857 dams with recorded heights. The tallest is Cougar Dam at 519 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	Cougar Dam	Lane	519	Rockfill	Flood Risk Reduction	High	1963
2	Detroit Dam	Linn	463	Gravity	Flood Risk Reduction	High	1953
3	Round Butte	Jefferson	440	Rockfill	Hydroelectric	High	1964
4	Owyhee Dam	Malheur	417	Concrete	Irrigation	High	1932
5	Brownlee	Baker	395	Rockfill	Hydroelectric	High	1958
6	Green Peter Dam	Linn	378	Gravity	Flood Risk Reduction	High	1967
7	Hills Creek Dam	Lane	341	Earth	Flood Risk Reduction	High	1962
8	Lookout Point Dam	Lane	276	Earth	Flood Risk Reduction	High	1953
9	Blue River Dam	Lane	270	Earth	Flood Risk Reduction	High	1968
10	Arthur R. Bowman Dam	Crook	245	Earth	Flood Risk Reduction	High	1961
11	Applegate Dam	Jackson	242	Rockfill	Flood Risk Reduction	High	1980
12	Smith	Linn	235	Earth	Hydroelectric	High	1963
13	John Day Lock and Dam	Klickitat	230	Earth	Navigation	High	1968
14	North Fork	Clackamas	207	Arch	Hydroelectric	High	1958
15	Fall Creek Dam	Lane	205	Rockfill	Flood Risk Reduction	High	1965
16	Pelton	Jefferson	204	Arch	Hydroelectric	High	1957
17	The Dalles Lock and Dam	Klickitat	200	Gravity	Navigation	High	1957
18	Development No. 1 Dam	Multnomah	200	Concrete	Water Supply	High	1929
19	Bonneville Locks and Dam	Multnomah	197	Gravity	Navigation	High	1938
20	Spillway Dam	Clackamas	180	Earth	Water Supply	High	1962
21	Mason Dam	Baker	173	Rockfill	Flood Risk Reduction	High	1968
22	Big Cliff Dam	Marion	172	Gravity	Hydroelectric	High	1954
23	Galesville	Douglas	167	Gravity	Irrigation	High	1985
24	Mckay Dam	Umatilla	165	Earth	Flood Risk Reduction	High	1927
25	Barney	Washington	165	Other	Water Supply	High	1998
26	Willow Creek Dam	Morrow	160		Flood Risk Reduction	High	1982
27	Dorena Dam	Lane	154	Earth	Flood Risk Reduction	High	1949
28	Scoggins Dam	Washington	151	Earth	Irrigation	High	1975
29	Berry Creek	Douglas	148	Earth	Water Supply	High	1980
30	Ochoco Dam	Crook	146	Earth	Fish and Wildlife Pond	High	1920
31	Wolf Creek	Union	128	Earth	Irrigation	High	1974
32	Soda Springs	Douglas	127	Arch	Hydroelectric	High	1952
33	Foster Dam	Linn	126	Rockfill	Flood Risk Reduction	High	1967
34	Bully Creek Dam	Malheur	121	Earth	Flood Risk Reduction	High	1963
35	Lemolo No 1	Douglas	120	Rockfill	Hydroelectric	High	1955
36	Dexter Dam	Lane	117	Earth	Flood Risk Reduction	High	1955
37	Cold Springs Dam	Umatilla	115	Earth	Irrigation	High	1908
38	Crow Creek	Wasco	115	Rockfill	Water Supply	High	1968
39	Hosler (reeder Gulch	Jackson	114	Concrete	Water Supply	High	1928
40	Mcguire	Yamhill	111	Rockfill	Water Supply	High	2003
41	Clear Branch	Hood River	110	Rockfill	Irrigation	High	1969
42	Willow Creek 3 (malheur)	Malheur	110	Earth	Irrigation	High	1944
43	Agency Valley Dam	Malheur	110	Earth	Flood Risk Reduction	High	1934
44	Pilcher Creek	Union	110	Earth	Irrigation	High	1984
45	Warm Springs Dam	Malheur	106	Concrete	Irrigation	High	1919
46	Haystack Dam	Jefferson	105	Earth	Irrigation	High	1957
47	Cottage Grove Dam	Lane	103	Earth	Flood Risk Reduction	High	1942
48	Timothy Lake	Clackamas	100	Earth	Hydroelectric	High	1956
49	Skull Creek Reservoir	Harney	100	Earth	Irrigation	Low	1934
50	Howard Prairie Dam	Jackson	100	Earth	Hydroelectric	High	1958

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