102 River Tributaries Dam 21 Reservoir Report
Last Updated: December 17, 2025
Located in Nodaway, Missouri, 102 River Tributaries Dam 21, also known as 102 Riv Trib Wtrshd #21 Dam, was completed in 1962 by the USDA NRCS.
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Summary
This local government-owned earth dam serves the primary purpose of grade stabilization along the TR-THILL BRANCH river. With a structural height of 34 feet and a dam length of 395 feet, the dam has a storage capacity of 33 acre-feet and covers a surface area of 13 acres. Although the hazard potential is rated as low and the condition assessment is not rated, the risk assessment is classified as moderate.
The dam features an uncontrolled spillway with a width of 24 feet and has no outlet gates or associated structures. With a drainage area of 358.4 square miles and a maximum discharge of 386 cubic feet per second, the dam plays a crucial role in managing water flow in the region. Even though it is not regulated by the state, inspected, or permitted, the dam fulfills its intended purpose of grade stabilization effectively. For water resource and climate enthusiasts, 102 River Tributaries Dam 21 stands as a testament to the importance of infrastructure in managing water resources and protecting against potential risks.
Year Completed |
1962 |
Dam Length |
395 |
Dam Height |
32 |
River Or Stream |
TR-THILL BRANCH |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
32 |
Drainage Area |
358.4 |
Nid Storage |
33 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
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.
102 River Tributaries Dam 21