Willow Creek Dam

Willow Creek Dam Quick Facts

Location: Madison, Montana
Coordinates: 45.7138, -111.6997
River: Willow Creek River
Primary Purpose: Irrigation
Type: Earth
Commissioned: 1938
Dam Height: 105 ft (32 m)
Dam Length: 453 ft (138 m)
Dam Capacity: 26,600 acre-ft (32,811 Ml)
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Willow Creek Dam Map

Willow Creek Dam Information

Willow Creek Dam is an earthen embankment dam located about 6 miles from Willow Creek, Madison, Montana.

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

The dam was designed by and commissioned in 1938 and is currently owned by STATE WATER PROJECTS.

Willow Creek Dam Structure

The Willow Creek Dam is approximately 453 feet (138 m) long, 105 feet (32 m) high and has a structural volume of cubic yards (0 cubic metres).

Willow Creek Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 18,000 acre-ft (22,203 Ml) and maximum capacity of 26,600 acre-ft (32,811 Ml).

The surface area of the reservoir is 885 acres (358 ha) and the total catchment area is 155 square miles (401 square kilometres).

Willow Creek Dam Spillway

The dam has a 90 feet (27 m) wide uncontrolled spillway with a maximum discharge capacity of 8300 cubic feet per second (235 cubic metres per second).

Willow Creek Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Willow Creek Dam
Madison, Montana
Height (ft)
105
Length (Ft)
453
Storage Volume (acre-ft)
26,600
Drainage Area (sq miles)
155
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

Willow Creek Dam Weather

Current Conditions at Willow Creek Dam

Parameter Value
Current Time 19:32
Sunrise 07:23
Sunset 16:59
Temperature (°F) 38
Feels Like (°F) 33
Cloud Coverage (%) 4
Pressure (inHg) 1018
Humidity (%) 61
Wind Speed (mph) 7
Rain (mm) 0

7-Day Forecast for Willow Creek 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 32 43 34 1011 41 13 19 WNW 100 1 rain and snow
Wed 25 41 29 1013 47 20 27 S 0 - overcast clouds
Thu 30 46 39 1011 33 15 21 SSW 0 - clear sky
Fri 27 37 31 1009 54 5 9 N 100 - snow
Sat 22 35 31 1015 78 9 17 SSW 100 - snow
Sun 21 37 24 1009 56 15 26 S 0 - overcast clouds
Mon 21 28 23 1012 83 5 8 N 100 - light snow
Tue 15 30 21 1027 55 12 15 WNW 0 - scattered clouds

Willow Creek Dam Frequently Asked Questions

In which state is the Willow Creek Dam?

Willow Creek Dam is in Montana.

In which county is the Willow Creek Dam?

Willow Creek Dam is in Madison County.

How high is the Willow Creek Dam?

Willow Creek Dam is 105 feet high.

How long is the Willow Creek Dam?

Willow Creek Dam is 453 feet long.

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More Dams in Madison County:

Badger Creek Watershed Site M-1-A Dam
Dunlap Lake Dam
Eaton Brook Reservoir Dam
Erieville Reservoir Dam
Holiday Shores Lake Dam
Kentucky River Dam No 10
Kentucky River Lock & Dam 11
Lake Choctaw Dam
Lake Moraine Dam
Lake Pushmataha Dam
Madison Dam
Nims Lake Dam
Ruby Dam
Silver Lake Dam
South River W/S Str. #29 Dam
Taylor Fork Lake Dam
Willow 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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