Montana Dams

2,990 dams tracked by the National Inventory of Dams

Total Dams

2,990

High Hazard

188

6.3%

Poor / Unsatisfactory

132

Average Age

74 yrs

Hazard Classification

High188 (6.3%)

Significant193 (6.5%)

Low2,606 (87.2%)

Condition Assessment

Satisfactory113 (3.8%)

Fair44 (1.5%)

Poor / Unsatisfactory132 (4.4%)

Not Rated2,701 (90.3%)

Federal

278

State

151

Local

Private

2,466

Tallest Dams

High Hazard Dams

Poor Condition Dams

Kootenai Dvlpmnt Impoundment DamPoor
West Fork Bitterroot (Painted Rocks)Poor
Newlan Creek DamPoor
HubbartPoor
Willow Creek DamPoor

All Dams in Montana

Showing 2601–2606 of 2,606

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
6m Dam Garfield County	12	1971	Low	Not Rated
#6 Blaine County	20	1938	Low	Not Rated
#5 Dam Big Horn County	36	1980	Low	Not Rated
26n9e22 Chouteau County	22	—	Low	Not Rated
20 Dam Custer County	29	2003	Low	Poor
1120 Ice Reservoir Dam Park County	25	1898	Low	Not 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.