East Fork Big Creek Dam A- 34 Reservoir Report
Last Updated: December 12, 2025
East Fork Big Creek Dam A-34, located in Harrison, Missouri, serves as a vital structure for grade stabilization along the TR-East Fork Big Creek.
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Summary
Built in 1961 by the USDA NRCS, this earth dam stands at a height of 25 feet and has a structural height of 27 feet, with a length of 430 feet. It has a maximum storage capacity of 115 acre-feet and a normal storage of 43 acre-feet, covering a surface area of 2 acres and draining a 38.4 square mile watershed.
Despite its low hazard potential and moderate risk assessment, East Fork Big Creek Dam A-34 is not currently regulated or inspected by state agencies. With a spillway width of 50 feet and a maximum discharge of 785 cubic feet per second, this uncontrolled spillway dam plays a crucial role in managing water flow and preventing erosion in the region. Although its condition is not rated and it lacks an Emergency Action Plan, the dam continues to fulfill its primary purpose of grade stabilization effectively.
As a key infrastructure owned by the local government and designed by the Natural Resources Conservation Service, East Fork Big Creek Dam A-34 showcases the importance of sustainable water resource management in mitigating climate risks and ensuring the safety of communities downstream. Its presence underscores the need for regular inspections, risk assessments, and emergency preparedness to address potential challenges and enhance the resilience of water structures in the face of changing environmental conditions.
Year Completed |
1961 |
Dam Length |
430 |
Dam Height |
25 |
River Or Stream |
TR-EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
25 |
Drainage Area |
38.4 |
Nid Storage |
115 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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 A- 34