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 551575 of 2,606

Dam NameHeight (ft)YearHazardCondition
Sagebrush #3

Fergus County

201958LowNot Rated
Sagebrush #2

Phillips County

301967LowNot Rated
Ryan (Garfield)

Garfield County

201968LowNot Rated
Rusty Bandalero

Hill County

81939LowNot Rated
Russiff #2

Powder River County

211960LowNot Rated
Russiff #1

Powder River County

111950LowNot Rated
Russian Frank Reservoir

Garfield County

181955LowNot Rated
Russell #1

Powder River County

151941LowNot Rated
Rusley #2

Fallon County

181955LowNot Rated
Ruseteun #2

Fergus County

251962LowNot Rated
Ruins Detention Dam

Valley County

351965LowPoor
Ruff Creek Retention Dam

McCone County

262003LowNot Rated
Rudy'S Dam

Carter County

111932LowUnsatisfactory
R Schmitz #1

Richland County

201970LowNot Rated
Rp Griffith #1

Musselshell County

191963LowNot Rated
R Pankratz #1

Phillips County

121935LowNot Rated
Royal Champion

Blaine County

151963LowNot Rated
Rowley Cb&O #1

Big Horn County

81960LowNot Rated
R Owen #2

Carter County

71920LowNot Rated
R Owen #1

Carter County

121923LowNot Rated
Row

Phillips County

201950LowNot Rated
Roundup Sewage Lagoon

Musselshell County

121957LowNot Rated
Round Butte Reservoir

Rosebud County

251964LowNot Rated
Rough Creek Dam

Rosebud County

351960LowNot Rated
Roth #1

Phillips County

151950LowNot 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.