Ls Mcmaster 4592 Reservoir Report
Last Updated: December 15, 2025
Ls Mcmaster 4592, also known as Mcmaster SWS, is a grade stabilization structure located in Turin, Iowa, along the Tr- Little Sioux River.
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Summary
Owned by the local government, this earth dam was designed by the USDA NRCS and completed in 1955. With a height of 33 feet and a storage capacity of 15 acre-feet, this structure serves the primary purpose of grade stabilization in the area.
Managed and funded by the Natural Resources Conservation Service, Ls Mcmaster 4592 has a low hazard potential and a moderate risk assessment rating. The spillway type is uncontrolled, with a width of 20 feet, and the dam is primarily made of stone on a soil foundation. While the structure has not been modified in recent years, it plays a crucial role in managing water resources and mitigating potential risks in the region.
For water resource and climate enthusiasts, Ls Mcmaster 4592 stands as a testament to the ongoing efforts to maintain and improve infrastructure for sustainable water management. As a vital component in the local watershed, this structure highlights the importance of collaboration between government agencies and the community to ensure the resilience of water resources in the face of changing climate conditions. With its historical significance and functional design, this dam serves as a valuable asset in safeguarding the environment and promoting a balanced approach to water resource management.
Year Completed |
1955 |
Dam Height |
33 |
River Or Stream |
Tr- Little Sioux River |
Primary Dam Type |
Earth |
Surface Area |
1 |
Drainage Area |
0.46 |
Nid Storage |
15 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
14800cfs |
Soldier River At Pisgah
|
112cfs |
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.
Ls Mcmaster 4592