Quick Facts About Pactola Dam
Pactola Dam Map
Pactola Dam Information
Pactola Dam is an earthen embankment dam located about 15 miles from Rapid City, Pennington, South Dakota.
The dam, which is on the Rapid Creek River, was primarily built for Flood Risk Reduction purposes, but also serves for Irrigation, Recreation and Water Supply benefits.
The dam was designed by US Bureau of Reclamation and commissioned in 1959 and is currently owned by US Bureau of Reclamation.
Pactola Dam Structure
The Pactola Dam is approximately 1,255 feet (383 m) long, 245 feet (75 m) high and has a structural volume of 4,532,000 cubic yards (3,464,963 cubic metres).
Pactola Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 55,965 acre-ft (69,032 Ml) and maximum capacity of 140,898 acre-ft (173,795 Ml).
The surface area of the reservoir is 1,557 acres (630 ha) and the total catchment area is 229 square miles (593 square kilometres).
Pactola Dam Spillway
The dam spillway has a maximum discharge capacity of 255000 cubic feet per second (7221 cubic metres per second).
Pactola Dam Compared to Four Famous American Dams
| Pactola Dam Pennington, South Dakota |
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) | 245 | 730 | 550 | 357 | 216 |
| Length (Ft) | 1,255 | 1,244 | 5,673 | 6,920 | 1,565 |
| Storage Volume (acre-ft) | 140,898 | 30,237,000 | 9,562,000 | 3,540,000 | 29,875,000 |
| Drainage Area (sq miles) | 229 | 167,800 | 74,100 | 3,611 | 108,355 |
Pactola Dam Weather
Current Conditions at Pactola Dam
Failed to fetch current weather data.7-Day Forecast for Pactola Dam
Failed to fetch weather forecast data.Pactola Dam Frequently Asked Questions
Pactola Dam is in South Dakota.
Pactola Dam is in Pennington County.
Pactola Dam is 245 feet high.
Pactola Dam is 1,255 feet long.
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Carthage Dam
Columbia Road Dam
Deerfield Dam
East Vermillion Dam
Elm Lake Dam
Grizzly Gulch Tailings Dam
Houghton Dam
Lacreek #10 Dam
Lacreek Dam No. 9
Lake Wanalain Dam
Mina Dam
Mitchell Dam
Oglala Dam
Pactola Dam
Redfield Lake Dam
Richmond Dam
Shadehill Dam
Sheridan Lake Dam
Willow Creek 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