Green Dam Reservoir Report
Last Updated: December 6, 2025
Green Dam, located in Dent County, Missouri, is a privately owned earth dam constructed in 1929 for recreational purposes on the TR Hyers Branch river.
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Summary
With a dam height of 25 feet and a storage capacity of 54 acre-feet, this low-hazard structure provides water storage for a surface area of 4 acres and drainage area of 68 square miles. Despite being unregulated by the state and without a formal inspection or maintenance schedule, Green Dam has a condition assessment of "Not Rated" and a hazard potential considered "Low".
Although Green Dam does not have a designated emergency action plan or updated risk assessment, its historical significance as a recreational site in the region makes it a valuable asset for water resource and climate enthusiasts. While the dam's condition and maintenance may warrant further attention and oversight, its contribution to the local ecosystem and community highlights the importance of sustainable management practices for water infrastructure. As a potential case study for resilience planning and risk mitigation in the face of climate change, Green Dam serves as a reminder of the interconnectedness between water resources, infrastructure development, and environmental stewardship.
Year Completed |
1929 |
Dam Height |
25 |
River Or Stream |
TR HYERS BRANCH |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
68 |
Nid Storage |
54 |
Structural Height |
25 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Piney Creek At Newburg
|
82cfs |
Meramec River At Cook Station
|
47cfs |
Big Piney River Near Big Piney
|
228cfs |
Big Piney Below Ft. Leonard Wood
|
297cfs |
Gasconade River At Jerome
|
944cfs |
Current River Above Akers
|
192cfs |
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.
Green Dam