East Fork Grand River Dam H- 33 Reservoir Report
Last Updated: December 17, 2025
East Fork Grand River Dam H- 33, located in Missouri along the TR-BIG ROCK CREEK, was completed in 2007 with a primary purpose of flood risk reduction.
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Summary
Designed by the USDA NRCS, this private earth dam stands at a height of 30 feet and has a storage capacity of 149.1 acre-feet. The dam spans 500 feet in length and has a spillway width of 50 feet to manage a maximum discharge of 295 cubic feet per second.
Despite its low hazard potential and moderate risk assessment, East Fork Grand River Dam H- 33 has not been rated for its condition and does not have an emergency action plan in place. Owned by a private entity, this dam serves as a critical infrastructure for flood control in Worth County, Missouri. With a drainage area of 90.24 square miles, the dam plays a vital role in mitigating flood risks and protecting downstream communities. For water resource and climate enthusiasts, this dam serves as a fascinating example of engineering ingenuity in managing water resources for the benefit of the local environment and population.
Year Completed |
2007 |
Dam Length |
500 |
Dam Height |
30 |
River Or Stream |
TR-BIG ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
30 |
Drainage Area |
90.24 |
Nid Storage |
149.1 |
Structural Height |
36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
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- 33