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 126150 of 1,436

Dam NameHeight (ft)YearHazardCondition
Tioga Lake Main

Mono County

271928HighSatisfactory
Tinemaha

Inyo County

321928HighPoor
Tiger Creek Regulator

Amador County

1151931SignificantFair
Tiger Creek Forebay

Amador County

33LowSatisfactory
Tiger Creek Afterbay

Amador County

1201931HighFair
Thurman

Shasta County

631966LowSatisfactory
Three Lakes

Plumas County

331928LowSatisfactory
Thompson Creek

Los Angeles County

661928HighSatisfactory
Thompson

Los Angeles County

1141925SignificantSatisfactory
Thomas Briles

Modoc County

231910HighSatisfactory
Thermalito Forebay

Butte County

911967HighSatisfactory
Thermalito Diversion

Butte County

1431967HighSatisfactory
Thermalito Afterbay

Butte County

391967HighFair
The Hill Ranch

Sonoma County

491955HighSatisfactory
Terminus Dam

Tulare County

2551962HighNot Available
Terminal Northeast Auxiliary Dam

Solano County

281959LowNot Available
Terminal

San Luis Obispo County

531969HighSatisfactory
Tennessee Valley Dam

Marin County

30HighNot Available
Telephone Flat

Modoc County

71931LowNot Rated
Tejon Storage 2

Kern County

671956LowSatisfactory
Tejon Storage 1

Kern County

321946LowSatisfactory
Taylor Creek No. 1

Modoc County

341952SignificantSatisfactory
Tanner

Calaveras County

351959HighSatisfactory
Tamarac Lake

Alpine County

211905LowSatisfactory
Tallac

El Dorado County

161970LowSatisfactory
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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.