East Fork Big Creek Dam E- 57 Reservoir Report
Last Updated: December 13, 2025
East Fork Big Creek Dam E-57, also known as Str E-57, is a local government-owned structure located in Harrison, Missouri.
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Summary
Designed by USDA NRCS and completed in 1987, this earth dam serves the primary purpose of flood risk reduction along the East Fork Big Creek. With a height of 30 feet and a length of 430 feet, the dam has a storage capacity of 57 acre-feet and a drainage area of 204.8 square miles.
The dam features a stone core and soil foundation, with a spillway width of 24 feet for uncontrolled water release. Despite being classified as low hazard potential and not currently rated for condition assessment, the Risk Assessment indicates a moderate risk level. There are no associated locks or outlet gates, and the dam has not been inspected recently. While it does not fall under state regulation or permitting, the dam's location and purpose play a crucial role in managing water resources and climate resilience in the region.
Although East Fork Big Creek Dam E-57 may not be the largest or most high-profile structure, its strategic placement and design contribute significantly to flood risk reduction efforts in the area. As water resource and climate enthusiasts, understanding the details and functionality of this dam can offer valuable insights into the broader ecosystem and infrastructure management practices in Missouri. With its focus on safety, efficiency, and risk management, this dam serves as an essential component of the local government's efforts to protect the surrounding communities and natural habitats from potential water-related hazards.
Year Completed |
1987 |
Dam Length |
430 |
Dam Height |
30 |
River Or Stream |
EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
30 |
Drainage Area |
204.8 |
Nid Storage |
57 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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 Fork Big Creek Dam E- 57