Nelson Dam No. 1 Reservoir Report
Last Updated: December 14, 2025
Nelson Dam No.
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Summary
1 is a privately owned earth dam located in Mosby, Missouri, along TR-Carroll Creek. Built in 1994 for grade stabilization purposes, this 32-foot tall structure has a maximum storage capacity of 94 acre-feet and serves to protect the surrounding area from potential erosion and flooding. With a surface area of 5 acres and a drainage area of 480 acres, the dam plays a crucial role in managing water flow and ensuring the stability of the ecosystem.
Despite being classified as having a low hazard potential, Nelson Dam No. 1 is considered to have a moderate risk rating due to its location and the potential consequences of failure. The dam features an uncontrolled spillway with a width of 25 feet and no outlet gates. While it has not been inspected recently and is not currently regulated by the state, the dam remains an important infrastructure for water resource management in the area. The risk management measures and emergency action plan for Nelson Dam No. 1 are not specified in the data provided, highlighting the need for continued monitoring and maintenance to ensure its safety and effectiveness in the face of changing climate conditions.
As a significant component of the local water infrastructure, Nelson Dam No. 1 showcases the importance of earth dams in maintaining water resources and protecting against the impacts of climate change. The dam's location in a moderate risk area underscores the need for ongoing assessment and planning to address potential hazards and ensure its continued functionality. With its role in grade stabilization and water storage, Nelson Dam No. 1 serves as a vital asset for the community, highlighting the intersection of water resource management and climate resilience in the face of an uncertain future.
Year Completed |
1994 |
Dam Length |
610 |
Dam Height |
32 |
River Or Stream |
TR-CARROLL CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
32 |
Drainage Area |
480 |
Nid Storage |
94 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Nelson Dam No. 1
Paved Bicycle Lake Trail Clay County