Idaho Dams

395 dams tracked by the National Inventory of Dams

Total Dams

395

High Hazard

24.6%

Poor / Unsatisfactory

Average Age

76 yrs

Hazard Classification

High97 (24.6%)

Significant141 (35.7%)

Low156 (39.5%)

Condition Assessment

Satisfactory76 (19.2%)

Fair248 (62.8%)

Poor / Unsatisfactory42 (10.6%)

Not Rated29 (7.3%)

Federal

State

Local

Private

325

Tallest Dams

High Hazard Dams

Poor Condition Dams

Magic DamUnsatisfactory
Fish CreekPoor
OrchardPoor
Saint JohnUnsatisfactory
Louisa CreekPoor

All Dams in Idaho

Showing 126–141 of 141

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
Teapot Lower Elmore County	32	1977	Significant	Fair
Teapot Upper Elmore County	28	1977	Significant	Poor
Thompson No 1 Main Dam Nez Perce County	17	1967	Significant	Fair
Thompson No 2 Clearwater County	19	1970	Significant	Fair
Thompson Srd Custer County	77	1982	Significant	Satisfactory
Tom J Valley County	57	1995	Significant	Fair
Tom J Dike Valley County	27	1995	Significant	Fair
Trail Elmore County	30	1960	Significant	Fair
Twenty Four Mile Caribou County	27	1928	Significant	Fair
Twin Lakes Kootenai County	14	2005	Significant	Fair
Walker Elmore County	14	1954	Significant	Fair
Warren Diversion Valley County	19	1924	Significant	Fair
W-Drain Gooding County	17	2008	Significant	Satisfactory
Williams Twin Falls County	53	1952	Significant	Fair
Wilson Lake Jerome County	31	1909	Significant	Fair
Winder Franklin County	57	1958	Significant	Fair

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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.