Upper Sunshine Dam

Upper Sunshine Dam Quick Facts

Location: Park, Wyoming
Coordinates: 44.0607, -109.0497
River: Greybull River (Offstream)
Primary Purpose: Irrigation
Type: Earth
Commissioned: 1942
Dam Height: 154 ft (47 m)
Dam Length: 1,150 ft (351 m)
Dam Capacity: 65,100 acre-ft (80,300 Ml)
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Upper Sunshine Dam Map

Upper Sunshine Dam Information

Upper Sunshine Dam is an earthen embankment dam located about 11 miles from Meeteetse, Park, Wyoming.

The dam, which is on the Greybull River (Offstream), was primarily built for Irrigation purposes, but also serves for benefits.

The dam was designed by HOWARD F. BELL and commissioned in 1942 and is currently owned by GREYBULL VALLEY IRRIGATION DISTRICT.

Upper Sunshine Dam Structure

The Upper Sunshine Dam is approximately 1,150 feet (351 m) long, 154 feet (47 m) high and has a structural volume of 1,800,000 cubic yards (1,376,199 cubic metres).

Upper Sunshine Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 52,987 acre-ft (65,358 Ml) and maximum capacity of 65,100 acre-ft (80,300 Ml).

The surface area of the reservoir is 1,156 acres (468 ha) and the total catchment area is 13 square miles (33 square kilometres).

Upper Sunshine Dam Spillway

The dam has a 40 feet (12 m) wide uncontrolled spillway with a maximum discharge capacity of 1520 cubic feet per second (43 cubic metres per second).

Upper Sunshine Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Upper Sunshine Dam
Park, Wyoming
Height (ft)
154
Length (Ft)
1,150
Storage Volume (acre-ft)
65,100
Drainage Area (sq miles)
13
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

Upper Sunshine Dam Weather

Current Conditions at Upper Sunshine Dam

Parameter Value
Current Time 19:32
Sunrise 07:08
Sunset 16:52
Temperature (°F) 23
Feels Like (°F) 14
Cloud Coverage (%) 100
Pressure (inHg) 1018
Humidity (%) 90
Wind Speed (mph) 7
Rain (mm) 0

7-Day Forecast for Upper Sunshine 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 22 40 37 1006 72 13 18 NNE 100 0 rain and snow
Wed 21 41 40 1013 55 22 43 WSW 0 - overcast clouds
Thu 31 44 38 1010 42 22 41 WSW 0 - clear sky
Fri 27 38 34 1004 55 7 9 ENE 35 - light snow
Sat 25 32 25 1013 79 8 8 WSW 100 - light snow
Sun 23 41 38 1007 31 9 10 WSW 31 - light snow
Mon 22 31 24 1006 91 6 12 NE 100 - snow
Tue 13 24 14 1023 77 7 13 NNE 96 - light snow

Upper Sunshine Dam Frequently Asked Questions

In which state is the Upper Sunshine Dam?

Upper Sunshine Dam is in Wyoming.

In which county is the Upper Sunshine Dam?

Upper Sunshine Dam is in Park County.

How high is the Upper Sunshine Dam?

Upper Sunshine Dam is 154 feet high.

How long is the Upper Sunshine Dam?

Upper Sunshine Dam is 1,150 feet long.

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More Dams in Park County:

Antero Dam
Buffalo Bill Dam
Eleven Mile Canyon Dam
Greybull Valley (1st Enl.) Dam
Lake Mineral Wells Dam
Lake Weatherford Dam
Little Raccoon Dam No. 12
Little Raccoon Dam No. 12b
Lower Sunshine Dam
Montgomery Dam
Robinson Tailings Pond #2 Dam
Spinney Mountain Dam
Upper Sunshine 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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