Loness Dam Reservoir Report
Last Updated: December 6, 2025
Loness Dam in Perry, Missouri, was completed in 1998 by the USDA NRCS and serves as a recreational reservoir on the TR-Hunt Branch river.
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Summary
The dam is an earth structure with a stone core, standing at 29 feet tall and stretching 370 feet in length. It has a maximum storage capacity of 35 acre-feet and covers a surface area of 6 acres, with a drainage area of 175 square miles.
Despite being privately owned and not regulated by the state, Loness Dam has a low hazard potential and a moderate risk assessment rating of 3. It features an uncontrolled spillway with a width of 21 feet and no outlet gates. The dam has not been rated for its condition assessment, but it undergoes inspections every 2 years. Although it does not have an Emergency Action Plan in place, the dam is considered to meet guidelines for risk management measures.
Overall, Loness Dam is a notable recreational water resource in Missouri, offering opportunities for outdoor enthusiasts to enjoy boating, fishing, and other water activities. With its picturesque location in St. Mary and its modest yet essential role in water storage and management, the dam stands as a testament to the importance of sustainable water resource development in the face of changing climate conditions.
Year Completed |
1998 |
Dam Length |
370 |
Dam Height |
25 |
River Or Stream |
TR-HUNT BRANCH |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
24 |
Drainage Area |
175 |
Nid Storage |
35 |
Structural Height |
29 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
29 |
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.
Loness Dam