East Fork Grand River Dam H- 31 Reservoir Report
Last Updated: December 16, 2025
East Fork Grand River Dam H-31, located in Denver, Missouri, was completed in 2000 by the USDA NRCS to primarily serve as a flood risk reduction structure along Big Rock Creek.
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Summary
This earth dam stands at a height of 30 feet and spans 540 feet, with a storage capacity of 112.2 acre-feet and a normal storage level of 33 feet. The dam's spillway is uncontrolled and 32 feet wide, with a maximum discharge rate of 141.1 cubic feet per second.
Despite its low hazard potential and moderate risk assessment rating, East Fork Grand River Dam H-31 has not been inspected since its completion in 2000, and its condition remains unrated. The dam's emergency action plan status, inundation maps, and risk management measures are also lacking information. Nevertheless, the structure's purpose of flood risk reduction emphasizes its importance in safeguarding the surrounding area from potential water-related disasters. Enthusiasts of water resources and climate resilience may find interest in monitoring the future maintenance and evaluation of East Fork Grand River Dam H-31 to ensure its continued effectiveness in protecting the community.
Year Completed |
2000 |
Dam Length |
540 |
Dam Height |
27 |
River Or Stream |
BIG ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
27 |
Drainage Area |
330.24 |
Nid Storage |
112.2 |
Structural Height |
30 |
Outlet Gates |
Other Controlled |
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 Grand River Dam H- 31