J. Chlecq Dam Reservoir Report
Nearby: Fishko Dam #3 Henderson House Dam
Last Updated: December 13, 2025
J.
°F
°F
mph
Wind
%
Humidity
Summary
Chlecq Dam, located in Fall River, South Dakota, is a privately owned structure constructed in 1955 by the Natural Resources Conservation Service. This Earth-type dam stands at a height of 26 feet and spans 550 feet in length, serving the primary purpose of water resource management along the TR-CHEYENNE river. With a storage capacity of 83 acre-feet and a maximum discharge of 975 cubic feet per second, the dam plays a crucial role in regulating water flow and mitigating flood risks in the region.
Despite being classified as having a low hazard potential, the condition of J. Chlecq Dam is currently not rated, indicating a need for further assessment and maintenance. The dam is subject to state regulations and inspections, with the South Dakota Department of Environment and Natural Resources overseeing enforcement and permitting processes. While the dam has not been modified in recent years and lacks certain emergency preparedness measures such as an Emergency Action Plan (EAP), it remains a vital infrastructure for water management in the area.
For water resource and climate enthusiasts, J. Chlecq Dam presents an intriguing case study of a privately owned structure with significant implications for water storage and flood control. The dam's location in a rural area highlights the importance of maintaining and monitoring such critical infrastructure to ensure the safety and sustainability of water resources. As discussions around climate change and water management continue to evolve, the condition and management of dams like J. Chlecq will be essential considerations for stakeholders and policymakers alike.
Year Completed |
1955 |
Dam Length |
550 |
Dam Height |
26 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
83 |
Hazard Potential |
Low |
Nid Height |
26 |
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.
J. Chlecq Dam