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 13761400 of 2,606

Dam NameHeight (ft)YearHazardCondition
Kuntson #2

Hill County

201900LowNot Rated
Kwasney

McCone County

311957LowNot Rated
Laas

Liberty County

151955LowNot Rated
La Bonte

Richland County

211959LowNot Rated
Lacosta

Garfield County

281968LowNot Rated
Lacosta Sand Creek Dam

Garfield County

201969LowNot Rated
Lady Bug

Rosebud County

181957LowNot Rated
Lake Rene

Lincoln County

201950LowNot Rated
Lake Seventeen Dam

Blaine County

151930LowNot Available
Lake Thibadeau Dam

Hill County

181938LowPoor
Lake Thibadeau Diversion Dam

Hill County

181938LowSatisfactory
Lambing Shed

Rosebud County

261971LowNot Rated
Lamesteer Dam

Wibaux County

341938LowUnsatisfactory
Lammers #1

Wheatland County

251984LowNot Rated
Landa #2

Powder River County

181960LowNot Rated
Landers #1

Park County

151949LowNot Rated
L and L

Custer County

221939LowNot Rated
Lang Corners

Phillips County

81952LowNot Rated
Langohr #1

Rosebud County

161965LowNot Rated
Langstaff #1

Carbon County

251945LowNot Rated
Lark Detention Dam

Phillips County

411968LowFair
Larry Pilster #2

Carter County

101950LowNot Rated
Lars

Chouteau County

661950LowNot Rated
Larso

Garfield County

151959LowNot Rated
Larson #2

Custer County

191963LowNot 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.