Quick Facts About St. Stephen Powerhouse Dam
St. Stephen Powerhouse Dam Map
St. Stephen Powerhouse Dam Information
St. Stephen Powerhouse Dam is a concrete earth gravity dam located about 2 miles from St.Stephen, Berkeley, South Carolina.
The dam, which is on the Cooper/Santee River, was primarily built for Navigation purposes, but also serves for Fish and Wildlife Pond, Recreation, Hydroelectric and Flood Risk Reduction benefits.
The dam was designed by CENWO and commissioned in 1985 and is currently owned by USACE – Charleston District.
St. Stephen Powerhouse Dam Structure
The St. Stephen Powerhouse Dam is approximately 965 feet (294 m) long, 128 feet (39 m) high and has a structural volume of 700,000 cubic yards (535,189 cubic metres).
St. Stephen Powerhouse Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 1,055,150 acre-ft (1,301,506 Ml) and maximum capacity of 1,405,570 acre-ft (1,733,742 Ml).
The surface area of the reservoir is 0 acres (0 ha) and the total catchment area is 15,000 square miles (38,850 square kilometres).
St. Stephen Powerhouse Dam Spillway
The dam spillway has a maximum discharge capacity of 24500 cubic feet per second (694 cubic metres per second).
St. Stephen Powerhouse Dam Compared to Four Famous American Dams
| St. Stephen Powerhouse Dam Berkeley, South Carolina |
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) | 128 | 730 | 550 | 357 | 216 |
| Length (Ft) | 965 | 1,244 | 5,673 | 6,920 | 1,565 |
| Storage Volume (acre-ft) | 1,405,570 | 30,237,000 | 9,562,000 | 3,540,000 | 29,875,000 |
| Drainage Area (sq miles) | 15,000 | 167,800 | 74,100 | 3,611 | 108,355 |
St. Stephen Powerhouse Dam Weather
Current Conditions at St. Stephen Powerhouse Dam
Failed to fetch current weather data.7-Day Forecast for St. Stephen Powerhouse Dam
Failed to fetch weather forecast data.St. Stephen Powerhouse Dam Frequently Asked Questions
St. Stephen Powerhouse Dam is in South Carolina.
St. Stephen Powerhouse Dam is in Berkeley County.
St. Stephen Powerhouse Dam is 128 feet high.
St. Stephen Powerhouse Dam is 965 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