East Fork Big Creek Dam E- 76 Reservoir Report
Last Updated: December 17, 2025
East Fork Big Creek Dam E- 76, also known as Str E-76, is a flood risk reduction structure located in Harrison, Missouri.
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Summary
Built in 1986 by the USDA NRCS, this earth dam stands at 29 feet high and spans 600 feet in length along the East Fork Big Creek. With a storage capacity of 149 acre-feet and a drainage area of 161.92 square miles, the dam serves a primary purpose of flood risk reduction to protect the surrounding area from potential water overflow.
Despite being non-federally regulated, East Fork Big Creek Dam E- 76 has a low hazard potential and a moderate risk assessment rating. The dam's spillway, which is uncontrolled and 40 feet wide, helps manage excess water flow during heavy rainfall events. While the dam's condition is currently not rated, its structural integrity and risk management measures are closely monitored by the local government to ensure the safety of nearby residents and infrastructure. With no outlet gates and a small surface area of 5 acres, this dam plays a crucial role in mitigating flood risks in the region.
Although East Fork Big Creek Dam E- 76 does not have a designated Emergency Action Plan (EAP) or inundation maps prepared, its risk assessment indicates a moderate level of risk (3 out of 5). With no associated locks or inspection frequency listed, it is apparent that this dam primarily relies on its design and construction quality to maintain its function. As a key flood risk reduction asset in the area, the dam's importance lies in its ability to protect the local community from potential water-related disasters.
Year Completed |
1986 |
Dam Length |
600 |
Dam Height |
29 |
River Or Stream |
EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
29 |
Drainage Area |
161.92 |
Nid Storage |
149 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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- 76