Mononame 364 Reservoir Report
Nearby: Boston Lake Dam Brandt Lake Dam
Last Updated: December 8, 2025
Mononame 364 is a privately owned recreational dam located in Franklin County, Missouri.
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Summary
Built in 1964, this earth dam stands at a height of 20 feet and has a storage capacity of 54 acre-feet. Situated on Pin Oak Creek offstream, Mononame 364 serves a primary purpose of recreation and covers a surface area of 5 acres within a drainage area of 361 acres.
Despite its low hazard potential and not being regulated by the state, Mononame 364 remains an integral part of the local water resource infrastructure. With its condition currently not rated and lacking an Emergency Action Plan, there is a potential need for further assessment and risk management measures to ensure the safety and longevity of the dam. Water resource and climate enthusiasts may find this structure intriguing for its historical significance and recreational value within the region.
Year Completed |
1964 |
Dam Height |
20 |
River Or Stream |
PIN OAK CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
361 |
Nid Storage |
54 |
Structural Height |
20 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bourbeuse River At Union
|
110cfs |
Missouri River At Hermann
|
31200cfs |
Bourbeuse River Near High Gate
|
1cfs |
Meramec River Near Sullivan
|
437cfs |
Gasconade River Near Rich Fountain
|
960cfs |
Meramec River Near Steelville
|
216cfs |
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.
Mononame 364