East Locust Creek Watershed Dam E- 21 Reservoir Report
Last Updated: December 15, 2025
East Locust Creek Watershed Dam E- 21, also known as Site E-21, is a local government-owned structure located in Boynton, Missouri, within Sullivan County.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1990 by the USDA NRCS, this earth-type dam stands at a height of 29 feet and spans 450 feet in length. Its primary purpose is flood risk reduction, serving to protect the area along the TR-East Locust Creek from potential flooding events.
With a normal storage capacity of 47 acre-feet and a maximum storage of 161 acre-feet, East Locust Creek Watershed Dam E- 21 plays a vital role in managing water resources in the region. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Although it has not been inspected since May 1991, the risk assessment for the structure is moderate, indicating a need for ongoing monitoring and maintenance to ensure its continued effectiveness in flood risk reduction.
Despite not being regulated by the state and lacking a formal emergency action plan, East Locust Creek Watershed Dam E- 21 remains a key asset in the area's water resource management efforts. As a part of the larger Rock Island District and under the oversight of the Natural Resources Conservation Service, this dam serves as a testament to the importance of local infrastructure in mitigating the impacts of climate change and ensuring the safety of communities in the face of unpredictable weather patterns.
Year Completed |
1990 |
Dam Length |
450 |
Dam Height |
29 |
River Or Stream |
TR-EAST LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
29 |
Drainage Area |
195.2 |
Nid Storage |
161 |
Structural Height |
29 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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.
East Locust Creek Watershed Dam E- 21