Smith Mountain Combination Pump Storage Dam, Virginia, USA

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Quick Facts About Smith Mountain Combination Pump Storage Dam

Location: Pittsylvania, Virginia
Coordinates: 37.041243, -79.535973
River: Roanoke River
Primary Purpose: Hydroelectric
Type: Arch Concrete
Commissioned: 1964
Dam Height: 229 ft (70 m)
Dam Length: 816 ft (249 m)
Dam Capacity: 1,150,000 acre-ft (1,418,502 Ml)
Condition Assessment: Satisfactory

Smith Mountain Combination Pump Storage Dam Map

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Smith Mountain Combination Pump Storage Dam Information

Smith Mountain Combination Pump Storage Dam is an arch concrete dam located about 26 miles from Altavista, Pittsylvania, Virginia.

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

The dam was designed by and commissioned in 1964 and is currently owned by Appalachian Power Company.

Smith Mountain Combination Pump Storage Dam Structure

The Smith Mountain Combination Pump Storage Dam is approximately 816 feet (249 m) long, 229 feet (70 m) high and has a structural volume of cubic yards (0 cubic metres).

Smith Mountain Combination Pump Storage Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 1,150,000 acre-ft (1,418,502 Ml) and maximum capacity of 1,150,000 acre-ft (1,418,502 Ml).

The surface area of the reservoir is 20,400 acres (8,256 ha) and the total catchment area is 1,024 square miles (2,652 square kilometres).

Smith Mountain Combination Pump Storage Dam Spillway

The dam has a 200 feet (61 m) wide uncontrolled spillway with a maximum discharge capacity of 50000 cubic feet per second (1416 cubic metres per second).

Smith Mountain Combination Pump Storage Dam Compared to Four Famous American Dams

Smith Mountain Combination Pump Storage Dam
Pittsylvania, Virginia
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) 229 730 550 357 216
Length (Ft) 816 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 1,150,000 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 1,024 167,800 74,100 3,611 108,355

Smith Mountain Combination Pump Storage Dam Weather

Current Conditions at Smith Mountain Combination Pump Storage Dam

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7-Day Forecast for Smith Mountain Combination Pump Storage Dam

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Smith Mountain Combination Pump Storage Dam Frequently Asked Questions

In which state is the Smith Mountain Combination Pump Storage Dam?

Smith Mountain Combination Pump Storage Dam is in Virginia.

In which county is the Smith Mountain Combination Pump Storage Dam?

Smith Mountain Combination Pump Storage Dam is in Pittsylvania County.

How high is the Smith Mountain Combination Pump Storage Dam?

Smith Mountain Combination Pump Storage Dam is 229 feet high.

How long is the Smith Mountain Combination Pump Storage Dam?

Smith Mountain Combination Pump Storage Dam is 816 feet long.

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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