Atkinson Lake Dam Reservoir Report
Last Updated: December 25, 2025
Atkinson Lake Dam, located in Chamois, Missouri, is a privately owned earth dam completed in 1976 for the primary purpose of irrigation.
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Summary
Situated on the TR-Richland Creek within the St. Louis District, the dam has a height of 15 feet and a length of 600 feet, providing a storage capacity of 60 acre-feet. With a surface area of 5.3 acres and a drainage area of 224 square miles, the dam plays a crucial role in regulating water flow and supporting agricultural activities in the region.
Although Atkinson Lake Dam is not state-regulated, it is classified as having a significant hazard potential and a moderate risk assessment level. The dam features an uncontrolled spillway with a width of 20 feet and has no outlet gates. Despite being in operation for several decades, the dam's condition assessment is currently listed as "Not Rated," with an inspection frequency of every 5 years. While there have been no reported modifications or emergency action plans in place, the dam continues to serve its purpose effectively in managing water resources for irrigation needs in the local community.
Overall, Atkinson Lake Dam stands as a vital infrastructure for water resource management in the region, contributing to the sustainability of agricultural activities and water supply. As a privately owned facility, the dam's operation and maintenance play a crucial role in ensuring the safety and functionality of the structure. With its historical significance dating back to the 1970s, Atkinson Lake Dam remains an essential asset in the landscape, providing essential water storage and regulation capabilities for the benefit of the local environment and economy.
Year Completed |
1976 |
Dam Length |
600 |
Dam Height |
15 |
River Or Stream |
TR-RICHLAND CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.3 |
Hydraulic Height |
15 |
Drainage Area |
224 |
Nid Storage |
60 |
Structural Height |
15 |
Outlet Gates |
None |
Hazard Potential |
Significant |
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.
Atkinson Lake Dam