Platte River Site 1-B Reservoir Report
Nearby: Ingells & Ervin Dam Young Dam No. 1
Last Updated: December 16, 2025
Platte River Site 1-B is a vital component of flood risk reduction efforts in Missouri, specifically within the Worth County area near the city of Sheridan.
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Summary
Built in 1961 by the USDA NRCS, this earth dam stands at a height of 38 feet and stretches over 460 feet in length, with a storage capacity of 267 acre-feet. Despite its age, the dam's condition is deemed satisfactory, with a low hazard potential and moderate risk assessment rating.
Situated along a tributary to the Platte River, this dam plays a crucial role in safeguarding the local community against potential flooding events. With a drainage area of 174 square miles and a maximum discharge capacity of 694 cubic feet per second, Platte River Site 1-B serves as a key infrastructure for managing water resources in the region. The dam is regulated by the DAM AND RESERVOIR SAFETY PROG agency, ensuring that it meets necessary inspection and enforcement standards to uphold its flood risk reduction purpose.
While the dam's primary function is flood risk reduction, it also contributes to water storage and management, with a normal storage capacity of 84 acre-feet. The surrounding surface area of 11 acres and its location in a predominantly rural setting highlight the significance of this structure in maintaining the ecological balance of the area. As water resource and climate enthusiasts, understanding the role of dams like Platte River Site 1-B is crucial in mitigating the impact of extreme weather events and ensuring sustainable water management practices.
Year Completed |
1961 |
Dam Length |
460 |
Dam Height |
38 |
River Or Stream |
TRIBUTARY TO PLATTE RIVER |
Primary Dam Type |
Earth |
Surface Area |
11 |
Drainage Area |
174 |
Nid Storage |
267 |
Structural Height |
38 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
38 |
Seasonal Comparison
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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.
Platte River Site 1-B