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 801825 of 1,436

Dam NameHeight (ft)YearHazardCondition
Mad Dog Lake Dam

Yuba County

121962LowNot Available
Madeline

Lassen County

221900LowSatisfactory
Madera Lake

Madera County

311958HighSatisfactory
Maerkle

San Diego County

1651963HighSatisfactory
Magalia

Butte County

1031918HighPoor
Magnolia

Nevada County

681967HighSatisfactory
Maine Prairie 3

Solano County

111965LowSatisfactory
Malibou Lake Club

Los Angeles County

441923HighSatisfactory
Mallacomes

Sonoma County

571951HighSatisfactory
Mallard

Contra Costa County

301930HighSatisfactory
Maloney

Contra Costa County

1071960HighSatisfactory
Mammoth Pool

Madera County

4111960HighSatisfactory
Mammoth Reservoir

Placer County

231851HighSatisfactory
Manhattan Creek

El Dorado County

321952HighSatisfactory
Manzanita Diversion

Madera County

301917HighSatisfactory
Manzanita Lake Dam

Shasta County

131911SignificantNot Available
Mardis Barry

Lassen County

141941SignificantSatisfactory
Maria

San Joaquin County

482003HighSatisfactory
Marina Lagoon

San Mateo County

171953LowSatisfactory
Mariposa Dam

Mariposa County

881948HighNot Available
Mark Edson

El Dorado County

1621962HighSatisfactory
Marshburn Retarding Basin

Orange County

271998HighSatisfactory
Marsh Creek

Contra Costa County

591963HighSatisfactory
Martinez Dam

Contra Costa County

621947HighNot Available
Martis Creek Dam

Nevada County

1131972HighNot Available
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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.