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 23762400 of 2,990

Dam NameHeight (ft)YearHazardCondition
Creedman Coulee Dam

Hill County

221938LowFair
Crazy Sombreo

Meagher County

581950SignificantNot Rated
Crazy Mountain Ranch

Park County

361968HighSatisfactory
Crazy Creek Reservoir

Fergus County

301946LowNot Rated
Crandall Reservoir

Roosevelt County

201937LowNot Rated
Cramer (Sweet Grass)

Sweet Grass County

151960LowNot Rated
Cracker

Pondera County

351915SignificantNot Rated
Cowpath Dam

Toole County

651967HighSatisfactory
Cow Creek

Blaine County

43SignificantNot Rated
Cowan Reservoir

Chouteau County

201936LowNot Rated
Courtney Herefords #3

Carter County

141960LowNot Rated
Coulter #2

Garfield County

251956LowNot Rated
Coulter #1

Garfield County

251955LowNot Rated
Couch Coulee #3

Hill County

151941LowNot Rated
Couch Coulee #2

Hill County

201940LowNot Rated
Couch Coulee #1

Hill County

161918LowNot Rated
Cottonwood Grazing #4 Dam

Phillips County

16LowNot Rated
Cottonwood Grazing #2

Phillips County

121954LowNot Rated
Cottonwood Dam (Park)

Park County

391953HighPoor
Cottonwood

Fergus County

381964LowNot Rated
Cotter

Phillips County

201950LowNot Rated
Costly Coulee Reservoir

Teton County

151950LowNot Rated
Costich Dam

Lincoln County

291956HighSatisfactory
Cosmic Nick

Madison County

151956LowNot Rated
Corvette

Richland County

201950LowNot 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.