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 501525 of 1,436

Dam NameHeight (ft)YearHazardCondition
North Fork

Santa Clara County

1001939HighPoor
North Battle Creek

Shasta County

471909HighSatisfactory
North

Contra Costa County

821961HighSatisfactory
Nine Springs

Lassen County

161954LowSatisfactory
Nimbus Dam

Sacramento County

871955HighNot Available
Niegel

El Dorado County

631951SignificantSatisfactory
New Woodbridge Diversion

San Joaquin County

312006SignificantSatisfactory
New Upper San Leandro

Alameda County

1821977HighSatisfactory
New Spicer Meadow

Tuolumne County

2651989HighSatisfactory
New Melones Dam

Calaveras County

6251979HighNot Available
New Lake Arrowhead

San Bernardino County

2251976HighSatisfactory
New Hogan Dam

Calaveras County

2101963HighNot Available
Newell

Santa Cruz County

1821960HighFair
New Calaveras

Alameda County

2102018HighSatisfactory
New Bullards Bar

Yuba County

6451970HighSatisfactory
New Bass Lake

El Dorado County

261978HighSatisfactory
Nevada City Raw Water Reservoir

Nevada County

481980LowSatisfactory
Nelson Corral Dam (Blm)

Lassen County

121980LowNot Rated
Naz Lake

Napa County

291955SignificantSatisfactory
Nash

Shasta County

411960HighSatisfactory
Napa Valley Lake

Napa County

401990LowSatisfactory
Nacimiento

San Luis Obispo County

2551956HighPoor
Myers

Lassen County

271957LowSatisfactory
Mustang Creek

Merced County

181975SignificantSatisfactory
Murry

Santa Clara County

541957LowSatisfactory
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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.