California Dams

1,436 dams tracked by the National Inventory of Dams

Total Dams

1,436

High Hazard

821

57.2%

Poor / Unsatisfactory

66

Average Age

77 yrs

Hazard Classification

High821 (57.2%)
Significant160 (11.1%)
Low455 (31.7%)

Condition Assessment

Satisfactory1,093 (76.1%)
Fair106 (7.4%)
Poor / Unsatisfactory66 (4.6%)
Not Rated171 (11.9%)

Federal

163

State

50

Local

322

Private

617

Poor Condition Dams

All Dams in California

Showing 626650 of 1,436

Dam NameHeight (ft)YearHazardCondition
Maloney

Contra Costa County

1071960HighSatisfactory
Mallard

Contra Costa County

301930HighSatisfactory
Mallacomes

Sonoma County

571951HighSatisfactory
Malibou Lake Club

Los Angeles County

441923HighSatisfactory
Maine Prairie 3

Solano County

111965LowSatisfactory
Magnolia

Nevada County

681967HighSatisfactory
Magalia

Butte County

1031918HighPoor
Maerkle

San Diego County

1651963HighSatisfactory
Madera Lake

Madera County

311958HighSatisfactory
Madeline

Lassen County

221900LowSatisfactory
Mad Dog Lake Dam

Yuba County

121962LowNot Available
Macumber

Shasta County

271907HighSatisfactory
Mabey Canyon

Riverside County

461974HighSatisfactory
Lytton

Sonoma County

341956HighSatisfactory
Lyons

Tuolumne County

1321930HighSatisfactory
Lynch Canyon

Solano County

21HighFair
Lundy Lake

Mono County

481911HighSatisfactory
Lowrey No. 1

Sonoma County

191954SignificantSatisfactory
Lower Van Norman Bypass

Los Angeles County

781970LowSatisfactory
Lower Twin Lake

Napa County

181985LowSatisfactory
Lower Twin Lake

Mono County

161888HighFair
Lower Sunset Debris Basin

Los Angeles County

861963HighSatisfactory
Lower Sunset

Alpine County

38LowSatisfactory
Lower Stoney Valley

Monterey County

351972LowPoor
Lower Stehly

San Diego County

60HighSatisfactory
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.