H. L. Reservoir Reservoir Report
Last Updated: December 5, 2025
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Summary
L. Reservoir, located in Crook, Wyoming, is a privately owned water storage facility with a primary purpose of providing fire protection, stock watering, and serving as a small fish pond. Completed in 1972, the earth dam stands at 15 feet high and stretches 700 feet in length, with a storage capacity of 181 acre-feet. The reservoir's low hazard potential and moderate risk assessment make it a crucial resource for the local community in Camp Crook SD.
Managed by the Wyoming State Engineer's Office, H. L. Reservoir undergoes regular inspections and meets state regulatory requirements for operation and maintenance. The uncontrolled spillway, with a width of 100 feet, ensures proper water management in case of overflow. The presence of a valve outlet gate allows for controlled water release, contributing to the overall safety and stability of the reservoir.
With a surface area of 14 acres and a normal storage capacity of 89 acre-feet, H. L. Reservoir plays a vital role in water resource management in the H L Basin. Its strategic location and design make it an essential asset for mitigating the impact of droughts, supporting local agriculture, and enhancing the resilience of the surrounding ecosystem in the face of changing climate conditions.
Year Completed |
1972 |
Dam Length |
700 |
Dam Height |
15 |
River Or Stream |
H L BASIN |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
15 |
Nid Storage |
181 |
Structural Height |
15 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
15 |
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.
H. L. Reservoir