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 651675 of 2,990

Dam NameHeight (ft)YearHazardCondition
Damschen #2

Petroleum County

251960LowNot Rated
Dana-Cameron Ranch

Cascade County

201940LowNot Rated
Danelson Reservoir

Daniels County

221968LowNot Rated
Danial Downs #2

Dawson County

141940LowNot Rated
Danial Downs #4

Dawson County

181940LowNot Rated
Daniel #1

Hill County

201960LowNot Rated
Daniel #2

Hill County

201954LowNot Rated
Daniel #3

Hill County

301976LowNot Rated
Dato

Pondera County

151960LowNot Rated
David Drum #1

Phillips County

121950LowNot Rated
David Drum #2

Phillips County

121950LowNot Rated
David Drum #3

Phillips County

151950LowNot Rated
David Drum #4

Phillips County

121950LowNot Rated
Davis Creek Dam

Powell County

381960SignificantNot Rated
Davis (Richland)

Richland County

251939LowNot Rated
Dawson Ranch #1

Cascade County

301948LowNot Rated
D Drum

Phillips County

121960LowNot Rated
Dead Horse Detention Dam

Valley County

161960LowSatisfactory
Deadmans Basin Dam

Wheatland County

601941HighSatisfactory
Deadmans Basin Dike

Wheatland County

231941HighSatisfactory
Deadmans Basin Water Supply Canal Storage Reservoir #2

Wheatland County

33LowNot Rated
Deadmans Basin Water Supply Canal Storage Reservoir #5

Wheatland County

30SignificantNot Rated
Deadmans Basin Water Supply Canal Storage Reservoir #6

Wheatland County

28LowNot Rated
Dealers Choice

McCone County

201944LowNot Rated
Dean S #1

McCone County

201943LowNot 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.