Cooney Dam

Cooney Dam Quick Facts

Location: Carbon, Montana
Coordinates: 45.4499, -109.2014
River: Red Lodge Creek River
Primary Purpose: Irrigation
Type: Earth
Commissioned: 1937
Dam Height: 102 ft (31 m)
Dam Length: 2,369 ft (722 m)
Dam Capacity: 28,230 acre-ft (34,821 Ml)
Condition Assessment: Satisfactory
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Cooney Dam Map

Cooney Dam Information

Cooney Dam is an earthen embankment dam located about 12 miles from Joliet, Carbon, Montana.

The dam, which is on the Red Lodge Creek River, was primarily built for Irrigation purposes, but also serves for benefits.

The dam was designed by and commissioned in 1937 and is currently owned by STATE WATER PROJECTS.

Cooney Dam Structure

The Cooney Dam is approximately 2,369 feet (722 m) long, 102 feet (31 m) high and has a structural volume of 483,206 cubic yards (369,438 cubic metres).

Cooney Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 28,140 acre-ft (34,710 Ml) and maximum capacity of 28,230 acre-ft (34,821 Ml).

The surface area of the reservoir is 1,078 acres (436 ha) and the total catchment area is 206 square miles (534 square kilometres).

Cooney Dam Spillway

The dam has a 150 feet (46 m) wide uncontrolled spillway with a maximum discharge capacity of 880 cubic feet per second (25 cubic metres per second).

Cooney Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Cooney Dam
Carbon, Montana
Height (ft)
102
Length (Ft)
2,369
Storage Volume (acre-ft)
28,230
Drainage Area (sq miles)
206
Hoover Dam
Clark County, Nevada
Height (ft)
730
Length (Ft)
1,244
Storage Volume (acre-ft)
30,237,000
Drainage Area (sq miles)
167,800
Grand Coulee Dam
Okanogan County, Washington
Height (ft)
550
Length (Ft)
5,673
Storage Volume (acre-ft)
9,562,0000
Drainage Area (sq miles)
74,100
Theodore Roosevelt Dam
Maricopa County, Arizona
Height (ft)
357
Length (Ft)
1,208
Storage Volume (acre-ft)
3,411,500
Drainage Area (sq miles)
5,736
Oroville Dam
Butte County, California
Height (ft)
235
Length (Ft)
6,920
Storage Volume (acre-ft)
3,540,000
Drainage Area (sq miles)
3,611
Glen Canyon Dam
Coconino County, Arizona
Height (ft)
216
Length (Ft)
1,565
Storage Volume (acre-ft)
29,875,000
Drainage Area (sq miles)
108,355

Cooney Dam Weather

Current Conditions at Cooney Dam

Parameter Value
Current Time 21:50
Sunrise 07:33
Sunset 18:30
Temperature (°F) 55
Feels Like (°F) 51
Cloud Coverage (%) 0
Pressure (inHg) 1012
Humidity (%) 25
Wind Speed (mph) 6
Rain (mm) 0

7-Day Forecast for Cooney Dam

Day Min Temp (°F) Max Temp (°F) Feels Like (°F) Pressure (inHg) Humidity (%) Wind Speed (mph) Wind Gust (mph) Wind Dir Precip Prob (%) Precip Volume (mm) Weather
Today 51 78 72 1014 16 16 26 SE 0 - clear sky
Wed 54 79 76 1002 15 9 13 SW 0 - clear sky
Thu 33 62 31 1008 93 14 23 WNW 100 3 rain and snow
Fri 32 40 34 1022 78 12 21 NW 100 - snow
Sat 28 47 33 1022 67 11 16 S 0 - clear sky
Sun 37 62 51 1011 54 16 26 NW 100 0 light rain
Mon 40 48 43 1014 74 8 12 NNW 100 2 light rain
Tue 37 53 48 1016 49 6 6 N 0 - overcast clouds

Cooney Dam Frequently Asked Questions

In which state is the Cooney Dam?

Cooney Dam is in Montana.

In which county is the Cooney Dam?

Cooney Dam is in Carbon County.

How high is the Cooney Dam?

Cooney Dam is 102 feet high.

How long is the Cooney Dam?

Cooney Dam is 2,369 feet long.

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More Dams in Carbon County:

Cooney Dam
High Savery Dam
Hog Park Main Dam
Hog Park Saddle Dam No. 1
Hog Park Saddle Dam No. 2
Lake Hauto Dam
Mauch Chunk Lake (Pa-462) Dam
Penn Forest Dam
Scofield Dam
Seminoe Dam
Wild Creek Dam

Condition Assessment Classification

Satisfactory

No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.

Fair

No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum

Poor

A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.

Unsatisfactory

A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.

Not Rated

The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.

Not Available

Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High

Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.

Significant

Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.

Low

Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner’s property.

Undetermined

Dams for which a downstream hazard potential has not been designated or is not provided.

Not Available

Dams for which the downstream hazard potential is restricted to approved government users.

Source: National Inventory of Dams

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