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

84

Private

2,466

All Dams in Montana

Showing 851875 of 2,990

Dam NameHeight (ft)YearHazardCondition
Engdahl #6

Garfield County

231950LowNot Rated
Engdahl #7

Garfield County

241940LowNot Rated
Engdall Reservoir #1

Garfield County

301937LowNot Rated
Engdall Reservoir #2

Garfield County

251934LowNot Rated
Engstrom

Sheridan County

241967LowNot Rated
Epiphany

Hill County

81960LowNot Rated
Epstlon

Blaine County

151940LowNot Rated
Erb #1

Big Horn County

161965LowNot Rated
Erickson

Richland County

231950LowNot Rated
Erickson #2

Rosebud County

251945LowNot Rated
Erickson #3

Rosebud County

141957LowNot Rated
Erickson #4

Rosebud County

181931LowNot Rated
Erickson L&L #5

Rosebud County

201940LowNot Rated
Ernest

Phillips County

251938LowNot Rated
Ernest Wallstein Dam

Carter County

36LowPoor
Ernie #1 Dam

Musselshell County

17LowNot Rated
Ernie Hudson

Stillwater County

451928LowNot Rated
Essinger Reservoir

McCone County

151936LowNot Rated
Ester Lake (Phillips)

Phillips County

171954SignificantNot Rated
Eugene S #1

McCone County

151945LowNot Rated
Eureka Holding Pond Dike

Lincoln County

401982SignificantNot Rated
Eureka Reservoir Dam

Teton County

321936HighPoor
Eureka Reservoir West Dike

Teton County

121936HighSatisfactory
Eva Murphy #1

Fergus County

161940LowNot Rated
Eva Murphy #4

Fergus County

201960LowNot Rated
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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.