Lacreek #10 Dam Reservoir Report
Last Updated: December 13, 2025
Lacreek #10 Dam, located in Bennett County, South Dakota, was completed in 1934 by the Fish and Wildlife Service for the primary purpose of creating a Fish and Wildlife Pond.
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Summary
The earth dam stands at a height of 11 feet, with a structural height of 14 feet and a hydraulic height of 9 feet, providing a storage capacity of 7690 acre-feet. With a normal storage level of 3020 acre-feet, the dam covers a surface area of 946 acres and serves a drainage area of 145.5 square miles.
Despite being classified as having a low hazard potential, the dam is regularly inspected and assessed to be in fair condition as of the last inspection in September 2019. The spillway, equipped with uncontrolled gates and a width of 60 feet, allows for a maximum discharge of 627 cubic feet per second. The outlet gates include other controlled mechanisms and a slide gate for water management. The risk assessment for the dam is moderate, with a rating of 3, indicating the need for ongoing risk management measures to ensure its safety and stability for the surrounding community and ecosystem.
Managed and operated by the Fish and Wildlife Service, Lacreek #10 Dam serves as a vital resource for wildlife habitat and water management in the region. The dam's location along Lake Creek and its close proximity to St. Paul District make it an essential component of the local ecosystem, providing critical support for fish and wildlife populations. As climate change continues to impact water resources, the maintenance and monitoring of dams like Lacreek #10 are crucial for sustainable water management and conservation efforts in South Dakota.
Year Completed |
1934 |
Dam Length |
900 |
Dam Height |
11 |
River Or Stream |
Lake Creek |
Primary Dam Type |
Earth |
Surface Area |
946 |
Hydraulic Height |
9 |
Drainage Area |
145.5 |
Nid Storage |
7690 |
Structural Height |
14 |
Outlet Gates |
Other Controlled, Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Lacreek #10 Dam