Little Sni-A-Bar #21 Reservoir Report
Last Updated: January 11, 2026
Little Sni-A-Bar #21, located in Lafayette, Missouri, is a local government-owned dam that was completed in 1975 by the USDA NRCS.
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Summary
This earth dam stands at a height of 38 feet and has a length of 345 feet, providing flood risk reduction for the surrounding area. With a storage capacity of 235 acre-feet and a drainage area of 141 square miles, this dam plays a crucial role in managing water resources in the region.
The dam, situated on the TR to Little Sni-A-Bar Creek, is regulated and inspected by the DAM AND RESERVOIR SAFETY PROGRAM, ensuring that it meets safety standards. Despite its high hazard potential, the dam's condition assessment in 2017 was satisfactory, indicating that it is well-maintained. With a moderate risk assessment rating, efforts are in place to manage and mitigate potential risks associated with the dam to protect the local community and environment. For water resource and climate enthusiasts, Little Sni-A-Bar #21 serves as a significant infrastructure contributing to the overall water management system in the area.
Year Completed |
1975 |
Dam Length |
345 |
Dam Height |
38 |
River Or Stream |
TR TO LITTLE SNI-A-BAR CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Drainage Area |
141 |
Nid Storage |
235 |
Structural Height |
38 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
38 |
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.
Little Sni-A-Bar #21