Quick Facts About American Falls Dam
American Falls Dam Map
American Falls Dam Information
American Falls Dam is a concrete gravity dam located in American Falls, Power, Idaho.
The dam, which is on the Snake River, was primarily built for Flood Risk Reduction purposes, but also serves for Fire Protection, Stock, Or Small Fish Pond, Irrigation, Fish and Wildlife Pond and Recreation benefits.
The dam was designed by and commissioned in 1927 and is currently owned by US Bureau of Reclamation.
American Falls Dam Structure
The American Falls Dam is approximately 5,277 feet (1,608 m) long, 87 feet (26 m) high and has a structural volume of 1,374,300 cubic yards (1,050,728 cubic metres).
American Falls Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 1,671,300 acre-ft (2,061,515 Ml) and maximum capacity of 1,671,300 acre-ft (2,061,515 Ml).
The surface area of the reservoir is 58,076 acres (23,503 ha) and the total catchment area is 13,580 square miles (35,172 square kilometres).
American Falls Dam Spillway
The dam spillway has a maximum discharge capacity of 87000 cubic feet per second (2464 cubic metres per second).
American Falls Dam Compared to Four Famous American Dams
| American Falls Dam Power, Idaho |
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) | 87 | 730 | 550 | 357 | 216 |
| Length (Ft) | 5,277 | 1,244 | 5,673 | 6,920 | 1,565 |
| Storage Volume (acre-ft) | 1,671,300 | 30,237,000 | 9,562,000 | 3,540,000 | 29,875,000 |
| Drainage Area (sq miles) | 13,580 | 167,800 | 74,100 | 3,611 | 108,355 |
American Falls Dam Weather
Current Conditions at American Falls Dam
Failed to fetch current weather data.7-Day Forecast for American Falls Dam
Failed to fetch weather forecast data.American Falls Dam Frequently Asked Questions
American Falls Dam is in Idaho.
American Falls Dam is in Power County.
American Falls Dam is 87 feet high.
American Falls Dam is 5,277 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