Quick Facts About Yellowtail Dam
Yellowtail Dam Map
Yellowtail Dam Information
Yellowtail Dam is a concrete arch dam located about 2 miles from Fort Smith, Big Horn, Montana.
The dam, which is on the Bighorn River, was primarily built for purposes, but also serves for benefits.
The dam was designed by and commissioned in 1966 and is currently owned by US Bureau of Reclamation.
Yellowtail Dam Structure
The Yellowtail Dam is approximately 1,480 feet (451 m) long, 491 feet (150 m) high and has a structural volume of 1,546,000 cubic yards (1,182,002 cubic metres).
Yellowtail Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 1,020,573 acre-ft (1,258,856 Ml) and maximum capacity of 1,331,725 acre-ft (1,642,656 Ml).
The surface area of the reservoir is 17,958 acres (7,267 ha) and the total catchment area is 19,650 square miles (50,893 square kilometres).
Yellowtail Dam Spillway
The dam has a 32 feet (10 m) wide controlled spillway with a maximum discharge capacity of 93000 cubic feet per second (2633 cubic metres per second).
Yellowtail Dam Compared to Four Famous American Dams
Yellowtail Dam Big Horn, Montana |
Hoover Dam Clark County, Nevada |
Grand Coulee Dam Okanogan County, Washington |
Theodore Roosevelt Dam Maricopa County, Arizona |
Glen Canyon Dam Coconino County, Arizona |
|
---|---|---|---|---|---|
Height (ft) | 491 | 730 | 550 | 357 | 216 |
Length (Ft) | 1,480 | 1,244 | 5,673 | 6,920 | 1,565 |
Storage Volume (acre-ft) | 1,331,725 | 30,237,000 | 9,562,000 | 3,540,000 | 29,875,000 |
Drainage Area (sq miles) | 19,650 | 167,800 | 74,100 | 3,611 | 108,355 |
Yellowtail Dam Weather
Current Conditions at Yellowtail Dam
Failed to fetch current weather data.7-Day Forecast for Yellowtail Dam
Failed to fetch weather forecast data.Yellowtail Dam Frequently Asked Questions
Yellowtail Dam is in Montana.
Yellowtail Dam is in Big Horn County.
Yellowtail Dam is 491 feet high.
Yellowtail Dam is 1,480 feet long.
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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