Owyhee Dam

Owyhee Dam Quick Facts

Location: Malheur, Oregon
Coordinates: 43.642, -117.2427
River: Owyhee River
Primary Purpose: Irrigation
Type: Concrete Arch
Commissioned: 1931
Dam Height: 417 ft (127 m)
Dam Length: 833 ft (254 m)
Dam Capacity: 1,200,000 acre-ft (1,480,176 Ml)
Condition Assessment: Not Available
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Owyhee Dam Map

Owyhee Dam Information

Owyhee Dam is a concrete arch dam located about 26 miles from Owyhee, Malheur, Oregon.

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

The dam was designed by US Bureau of Reclamation and commissioned in 1931 and is currently owned by US Bureau of Reclamation.

Owyhee Dam Structure

The Owyhee Dam is approximately 833 feet (254 m) long, 417 feet (127 m) high and has a structural volume of 537,500 cubic yards (410,948 cubic metres).

Owyhee Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 1,120,000 acre-ft (1,381,498 Ml) and maximum capacity of 1,200,000 acre-ft (1,480,176 Ml).

The surface area of the reservoir is 13,900 acres (5,625 ha) and the total catchment area is 10,706 square miles (27,728 square kilometres).

Owyhee Dam Spillway

The dam has a 189 feet (58 m) wide controlled spillway with a maximum discharge capacity of 40000 cubic feet per second (1133 cubic metres per second).

Owyhee Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Owyhee Dam
Malheur, Oregon
Height (ft)
417
Length (Ft)
833
Storage Volume (acre-ft)
1,200,000
Drainage Area (sq miles)
10,706
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

Owyhee Dam Weather

Current Conditions at Owyhee Dam

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7-Day Forecast for Owyhee Dam

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Owyhee Dam Frequently Asked Questions

In which state is the Owyhee Dam?

Owyhee Dam is in Oregon.

In which county is the Owyhee Dam?

Owyhee Dam is in Malheur County.

How high is the Owyhee Dam?

Owyhee Dam is 417 feet high.

How long is the Owyhee Dam?

Owyhee Dam is 833 feet long.

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More Dams in Malheur County:

Agency Valley Dam
Antelope Dam
Bully Creek Dam
Owyhee Dam
Warm Springs Dam
Willow Creek 3 (Malheur) 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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