East Fork Big Creek Dam E- 41 Reservoir Report
Last Updated: December 12, 2025
East Fork Big Creek Dam E-41, located in Bethany, Missouri, is a vital flood risk reduction structure designed by the USDA NRCS and completed in 1986.
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Summary
This earth dam stands at a height of 24 feet and has a structural height of 26 feet, with a length of 510 feet. It serves the primary purpose of flood risk reduction along the East Fork Big Creek, with a normal storage capacity of 24 acre-feet and a maximum storage of 100 acre-feet.
With a low hazard potential and a moderate risk assessment rating, East Fork Big Creek Dam E-41 plays a crucial role in protecting the surrounding areas from potential flooding events. Despite not being state regulated or inspected, this dam is equipped with an uncontrolled spillway and has a drainage area of 320 square miles. The dam's location in Harrison County, Missouri, highlights its significance in managing water resources and mitigating the impact of extreme weather events on the local community.
As a key infrastructure owned by the local government, East Fork Big Creek Dam E-41 exemplifies the collaborative efforts between federal agencies like the Natural Resources Conservation Service and state authorities to enhance flood resilience in the region. Its strategic design and construction reflect a commitment to safeguarding the environment and ensuring the safety of residents in the face of changing climate patterns. Water resource and climate enthusiasts can appreciate the innovative engineering behind this dam and its integral role in sustaining water security for the surrounding areas.
Year Completed |
1986 |
Dam Length |
510 |
Dam Height |
24 |
River Or Stream |
EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
24 |
Drainage Area |
320 |
Nid Storage |
100 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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- 41