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 826850 of 1,436

Dam NameHeight (ft)YearHazardCondition
Jones Ranch

Trinity County

361980SignificantSatisfactory
Johnston

San Mateo County

311919LowSatisfactory
Johnson Ranch

Mendocino County

26HighFair
John Orr

Amador County

201959LowSatisfactory
John Carl Warnecke

Sonoma County

321974LowSatisfactory
Jenks Lake - Dam

San Bernardino County

301875HighNot Rated
Jeff Davis

Calaveras County

1141973HighSatisfactory
J.C. Jacobsen

Kern County

561973HighSatisfactory
Jayne'S Lake

Mendocino County

701985LowSatisfactory
Janes Flat

Modoc County

221918SignificantNot Rated
Jamison Lake

Plumas County

151902LowNot Rated
James Porter

Modoc County

211928HighSatisfactory
Jameson Vineyards

Napa County

41SignificantSatisfactory
James Montgomery

Shasta County

241869SignificantPoor
James J. Lenihan

Santa Clara County

2081953HighFair
James H. Turner

Alameda County

1931964HighSatisfactory
Jacobs Creek

El Dorado County

531948LowSatisfactory
Jack'S Swamp Dam No. 2

Modoc County

121926LowSatisfactory
Jackson Meadows

Nevada County

2051965HighSatisfactory
Jackson Lake

Nevada County

291943HighSatisfactory
Jackson Creek Spillway

Amador County

37HighSatisfactory
Jackson Creek

Amador County

1931965HighSatisfactory
Iverson

Lassen County

451968LowSatisfactory
Island Weir

Kings County

131926LowSatisfactory
Isabel Lake No. 2

Santa Clara County

18LowSatisfactory
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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.