East Fork Big Creek Dam E- 46 Reservoir Report
Last Updated: December 12, 2025
East Fork Big Creek Dam E-46, located in Bethany, Missouri, was completed in 1998 to primarily address flood risk reduction along the East Fork Big Creek.
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Summary
Owned by a private entity and designed by the USDA NRCS, this earth dam stands at a height of 26.5 feet with a hydraulic height of 24 feet and a structural height of 34 feet. With a maximum storage capacity of 95 acre-feet and a normal storage level of 24 acre-feet, the dam serves to safeguard the surrounding area from potential flooding events.
Although the dam is categorized as having a low hazard potential, it is considered to have moderate risk with a rating of 3 out of 5. The spillway type is uncontrolled with a width of 20 feet, and there are no outlet gates associated with the structure. The dam's condition assessment is currently not rated, with no recent inspection date provided. Despite its moderate risk level, East Fork Big Creek Dam E-46 remains an essential infrastructure for flood risk reduction in the region, highlighting the importance of maintaining and monitoring such water resource facilities to ensure their effectiveness in climate change adaptation and water management strategies.
Year Completed |
1998 |
Dam Length |
470 |
Dam Height |
26.5 |
River Or Stream |
EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
24 |
Drainage Area |
110.02 |
Nid Storage |
95 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
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- 46