Elmwood No 77a Reservoir Report
Last Updated: December 16, 2025
Elmwood No 77a, located in Sullivan, Missouri, is a local government-owned earth dam constructed in 1984 for grade stabilization purposes along the TR-East Locust Creek.
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Summary
With a height of 31 feet and a length of 210 feet, this dam has a storage capacity of 43 acre-feet and serves a drainage area of 192 acres. Despite its low hazard potential and moderate risk assessment, the dam is currently rated as "Not Rated" in terms of its condition assessment.
The dam features an uncontrolled spillway with a width of 10 feet and no outlet gates. Although it has not been inspected recently, Elmwood No 77a is considered to be in a moderate risk category, with emergency action plans and risk management measures yet to be implemented. With its stone core and soil foundation, this dam plays a crucial role in managing water resources and protecting the surrounding area from potential flooding events.
Water resource and climate enthusiasts can appreciate Elmwood No 77a for its contribution to grade stabilization and its role in managing the flow of the TR-East Locust Creek. While the dam's condition assessment is currently not rated, its low hazard potential and moderate risk assessment highlight the importance of ongoing monitoring and maintenance to ensure the safety and effectiveness of this vital infrastructure. As efforts continue to enhance emergency preparedness and risk management measures, Elmwood No 77a stands as a key structure in the local government's water resource management strategy in the Sullivan, Missouri region.
Year Completed |
1984 |
Dam Length |
210 |
Dam Height |
31 |
River Or Stream |
TR-EAST LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
31 |
Drainage Area |
192 |
Nid Storage |
43 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Chariton River At Novinger
|
71cfs |
Medicine Creek Near Laredo
|
15cfs |
Locust Creek Near Linneus
|
36cfs |
Chariton River At Livonia
|
45cfs |
Thompson River At Trenton
|
140cfs |
Chariton River Near Moulton
|
34cfs |
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.
Elmwood No 77a