East Fork Big Creek Dam A- 31 Reservoir Report
Last Updated: December 12, 2025
East Fork Big Creek Dam A-31, located in Harrison, Missouri, was completed in 1965 by the USDA NRCS.
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Summary
The primary purpose of this earth dam is grade stabilization, with a structural height of 30 feet and a dam length of 650 feet. The dam has a storage capacity of 94 acre-feet and serves to control the flow of the TR-East Fork Big Creek.
Despite being classified as a low hazard potential structure, East Fork Big Creek Dam A-31 has a moderate risk assessment rating of 3. The dam features an uncontrolled spillway with a width of 50 feet and has not been inspected recently. The surrounding area has a drainage area of 48 square miles, and the dam plays a crucial role in managing water resources in the region.
Water resource and climate enthusiasts will be interested in the design and construction details of East Fork Big Creek Dam A-31, as well as its impact on the local ecosystem. With its role in grade stabilization and water flow control, this dam is a key piece of infrastructure in the area. The data provides valuable insights into the dam's specifications and its importance for water management in Missouri.
Year Completed |
1965 |
Dam Length |
650 |
Dam Height |
28 |
River Or Stream |
TR-EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
28 |
Drainage Area |
48 |
Nid Storage |
94 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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- 31