East Fork Big Creek Dam E- 64 Reservoir Report
Last Updated: December 13, 2025
East Fork Big Creek Dam E-64, located in Harrison, Missouri, is a vital structure designed by USDA NRCS to mitigate flood risk along the East Fork Big Creek.
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Summary
Completed in 1986, this earth dam stands at a height of 27 feet and stretches 350 feet in length, offering flood risk reduction as its primary purpose. With a storage capacity of 54 acre-feet and a drainage area of 320 square miles, the dam plays a crucial role in managing water flow and protecting the surrounding area from potential inundation.
This dam, owned by the local government, is classified as having a low hazard potential and a moderate risk assessment of 3. Despite not being regulated by the state, East Fork Big Creek Dam E-64 serves as a significant infrastructure in mitigating flood-related risks in the region. With a spillway width of 20 feet and uncontrolled spillway type, the dam is equipped to handle maximum discharges of up to 40 cubic feet per second, ensuring efficient water management during heavy precipitation events. While it is not currently rated for condition assessment, the dam's strategic location and design make it a critical asset for water resource and climate enthusiasts interested in flood risk reduction efforts.
In summary, East Fork Big Creek Dam E-64 is a noteworthy structure in the Rock Island District, contributing to flood risk reduction efforts in the area. Managed by the local government and designed by USDA NRCS, this earth dam stands as a testament to effective water resource management practices. With its moderate risk assessment and low hazard potential, the dam plays a crucial role in safeguarding the community against potential flooding events, highlighting the importance of strategic infrastructure in water resource and climate resilience initiatives.
Year Completed |
1986 |
Dam Length |
350 |
Dam Height |
27 |
River Or Stream |
EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
27 |
Drainage Area |
320 |
Nid Storage |
54 |
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 Fork Big Creek Dam E- 64