Lacreek Dam No. 9 Reservoir Report
Last Updated: December 13, 2025
Lacreek Dam No.
°F
°F
mph
Wind
%
Humidity
Summary
9, located in Bennett, South Dakota, is a Federal-owned structure managed by the Fish and Wildlife Service for the primary purpose of serving as a Fish and Wildlife Pond. Built in 1934, this Earth-type dam stands at a height of 12 feet and has a hydraulic height of 10 feet, with a length of 7000 feet. The dam has a storage capacity of 14,331 acre-feet, with a normal storage level of 4,730 acre-feet, and covers a surface area of 1,564 acres.
Despite its low hazard potential, Lacreek Dam No. 9 has a poor condition assessment as of September 2019, indicating a need for maintenance and repairs. The dam has an uncontrolled spillway type and is equipped with slide (sluice gate) outlet gates. With a moderate risk assessment rating of 3, the dam is subject to regular inspection every 5 years to ensure its structural integrity and safety. While the dam does not fall under state jurisdiction or regulation, it remains an important water resource structure within the St. Paul District managed by the Fish and Wildlife Service.
Year Completed |
1934 |
Dam Length |
7000 |
Dam Height |
12 |
River Or Stream |
LAKE CREEK |
Primary Dam Type |
Earth |
Surface Area |
1564 |
Hydraulic Height |
10 |
Drainage Area |
136.7 |
Nid Storage |
14331 |
Structural Height |
12 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
12 |
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 Dam No. 9