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 526550 of 2,990

Dam NameHeight (ft)YearHazardCondition
Shumaker #1

Prairie County

181965LowNot Rated
Shoup Lake

Powell County

181925LowNot Rated
Shotgun Creek Dike #3

Roosevelt County

81930SignificantNot Rated
Shotgun Creek Dike #2

Roosevelt County

101930SignificantNot Rated
Shipley'S (Custer)

Custer County

271965LowNot Rated
Shipley Reservoir (Powder R.)

Powder River County

231961LowNot Rated
Shining Mountain

Ravalli County

451972LowNot Rated
Shields Fields

Roosevelt County

301960LowNot Rated
Shendell #2

Meagher County

301949LowNot Rated
Shelly'S Hope

Lincoln County

81950LowNot Rated
Shelby Sewage Lagoon

Toole County

101960LowNot Rated
Sheffels Reservoir

Cascade County

681963LowNot Rated
Shefelbine

McCone County

201965LowNot Rated
Sheepshed Detention Dam

Valley County

271954LowUnsatisfactory
Sheepland

Musselshell County

151946LowNot Rated
Sheep Buyer

Chouteau County

251905LowNot Rated
Shay Dam

Toole County

151915SignificantNot Rated
Shawver #1

Garfield County

251940LowNot Rated
Shaw Reservoir (Garfield)

Garfield County

201948LowNot Rated
Shaw #3

Garfield County

301947LowNot Rated
Shaw #1

Garfield County

351973LowNot Rated
Sharkey #1

Petroleum County

251965LowNot Rated
Shand #1

Rosebud County

151948LowNot Rated
Shale Creek

Petroleum County

291957LowNot Rated
Shady Lane

McCone 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.