Water Supply Dams in California

California has 747 water supply dams, of which 413 carry a high hazard classification. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area.

#	Dam	County	Height (ft)	Hazard	Condition	Year
1	Pyramid	Los Angeles	422	High	Fair	1974
2	Pardee	Calaveras	352	High	Fair	1929
3	Castaic	Los Angeles	340	High	Poor	1973
4	O`shaughnessy	Tuolumne	312	High	Satisfactory	1923
5	Olivenhain	San Diego	309	High	Satisfactory	2003
6	Diamond Valley Lake	Riverside	284	High	Satisfactory	2000
7	Mathews	Riverside	264	High	Satisfactory	1938
8	Cedar Springs	San Bernardino	249	High	Fair	1971
9	Anderson	Santa Clara	240	High	Unsatisfactory	1950
10	El Capitan	San Diego	237	High	Poor	1934
11	Los Vaqueros	Contra Costa	231	High	Satisfactory	1997
12	Peters	Marin	230	High	Satisfactory	1954
13	Rollins	Nevada	228	High	Satisfactory	1965
14	Ramona	San Diego	228	High	Satisfactory	1988
15	New Lake Arrowhead	San Bernardino	225	High	Satisfactory	1976
16	San Joaquin Reservoir	Orange	224	High	Satisfactory	1966
17	Santa Felicia	Ventura	213	High	Poor	1955
18	New Calaveras	Alameda	210	High	Satisfactory	2018
19	James J. Lenihan	Santa Clara	208	High	Fair	1953
20	Jackson Meadows	Nevada	205	High	Satisfactory	1965
21	Lake Loveland	San Diego	203	High	Satisfactory	1945
22	Elderberry Forebay	Los Angeles	200	Low	Satisfactory	1972
23	Chet Harritt	San Diego	200	High	Satisfactory	1962
24	Mulholland	Los Angeles	195	High	Satisfactory	1924
25	James H. Turner	Alameda	193	High	Satisfactory	1964
26	Whale Rock	San Luis Obispo	193	High	Satisfactory	1960
27	Bouquet Canyon	Los Angeles	190	High	Fair	1934
28	Lake Arrowhead	San Bernardino	190	Significant	Poor	1922
29	Stone Canyon	Los Angeles	188	High	Satisfactory	1924
30	Walnut Canyon	Orange	187	High	Satisfactory	1968
31	Austrian	Santa Clara	185	High	Satisfactory	1950
32	Copper Basin	San Bernardino	184	High	Satisfactory	1938
33	Sly Park	El Dorado	182	High	Satisfactory	1955
34	Newell	Santa Cruz	182	High	Satisfactory	1960
35	Morena	San Diego	181	High	Poor	1912
36	Upper Chiquita	Orange	177	High	Satisfactory	2012
37	Paradise	Butte	175	High	Satisfactory	1957
38	Diemer No. 8	Orange	172	Significant	Satisfactory	1968
39	San Pablo	Contra Costa	170	High	Satisfactory	1920
40	Homestake Tailings	Lake	169	High	Satisfactory	1990
41	Encino	Los Angeles	168	High	Satisfactory	1924
42	Prosser Creek Dam	Nevada	166	High	Not Available	1962
43	Lopez	San Luis Obispo	166	High	Satisfactory	1969
44	Maerkle	San Diego	165	High	Satisfactory	1963
45	Miramar	San Diego	165	High	Satisfactory	1960
46	Rector Creek	Napa	164	High	Satisfactory	1946
47	Mark Edson	El Dorado	162	High	Satisfactory	1962
48	Poway	San Diego	162	High	Satisfactory	1971
49	Barrett	San Diego	161	High	Poor	1922
50	Garvey Reservoir	Los Angeles	160	High	Satisfactory	1954
51	Brick Flat Pit Containment	Shasta	160	Low	Satisfactory	1994
52	Westlake Reservoir	Los Angeles	158	High	Satisfactory	1972
53	Slickrock Creek	Shasta	155	Significant	Satisfactory	2004
54	Vail	Riverside	152	High	Fair	1949
55	R. W. Matthews	Trinity	150	High	Satisfactory	1962
56	Savage	San Diego	149	High	Poor	1919
57	Ler Crystal Springs	San Mateo	149	High	Satisfactory	1888
58	Middlefield Reservoir	Alameda	147	High	Satisfactory	1958
59	Palisades Reservoir	Orange	146	High	Satisfactory	1963
60	Wood Ranch	Ventura	146	High	Satisfactory	1965
61	Thermalito Diversion	Butte	143	High	Satisfactory	1967
62	Chabot	Alameda	142	High	Satisfactory	1892
63	Upper Oso	Orange	142	High	Satisfactory	1979
64	Guadalupe	Santa Clara	142	High	Poor	1935
65	Gene Wash	San Bernardino	140	High	Satisfactory	1937
66	Coyote	Santa Clara	140	High	Poor	1936
67	Stony Gorge Dam	Glenn	139	High	Not Available	1928
68	Frenchman	Plumas	139	High	Satisfactory	1961
69	Lauro Dam	Santa Barbara	137	High	Not Available	1952
70	Santiago Creek	Orange	136	High	Poor	1933
71	Lake Hemet	Riverside	135	High	Satisfactory	1895
72	Salinas Dam	San Luis Obispo	135	High	Not Available	1941
73	Lafayette	Contra Costa	132	High	Fair	1929
74	Stevens Creek	Santa Clara	132	High	Fair	1935
75	Lake Hodges	San Diego	131	High	Unsatisfactory	1918
76	Ortega Dam	Santa Barbara	131	High	Not Available	1956
77	Perris	Riverside	130	High	Satisfactory	1973
78	Long Valley	Mono	126	High	Satisfactory	1941
79	Ler San Fernando	Los Angeles	125	High	Satisfactory	1918
80	Conn Creek	Napa	125	High	Fair	1946
81	Hernandez	San Benito	124	High	Satisfactory	1962
82	Summit Reservoir	Solano	124	High	Satisfactory	1968
83	Lake Mission Viejo	Orange	123	High	Poor	1976
84	Henshaw	San Diego	123	High	Satisfactory	1923
85	Soulajule	Marin	122	High	Satisfactory	1979
86	Red Mountain Reservoir	San Diego	120	High	Satisfactory	1985
87	Edwards Reservoir	Santa Barbara	120	High	Satisfactory	1985
88	Big Creek	Tuolumne	120	High	Satisfactory	1969
89	Green Verdugo	Los Angeles	118	High	Satisfactory	1953
90	Uvas	Santa Clara	118	High	Satisfactory	1957
91	Lake Temescal	Alameda	116	High	Satisfactory	1869
92	Dixon	San Diego	116	High	Satisfactory	1970
93	Grizzly Valley	Plumas	115	High	Satisfactory	1966
94	Jeff Davis	Calaveras	114	High	Satisfactory	1973
95	Thompson	Los Angeles	114	Significant	Satisfactory	1925
96	El Toro Reservoir	Orange	113	High	Satisfactory	1967
97	Antelope	Plumas	113	High	Satisfactory	1964
98	Sweetwater Main	San Diego	112	High	Fair	1888
99	Upper Stone Canyon	Los Angeles	111	Low	Satisfactory	1954
100	Turner	San Diego	111	High	Satisfactory	1971

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