Marion Lake Dam Reservoir Report
Last Updated: December 12, 2025
Marion Lake Dam, located in Harrison, Missouri, was completed in 1955 with a primary purpose of fire protection, stock, or as a small fish pond.
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Summary
The earth dam, standing at 30 feet in height, serves as a vital resource for the region, offering a storage capacity of 96 acre-feet and a normal storage level of 60 acre-feet. With a surface area of 6 acres and a drainage area of 60 acres, Marion Lake Dam plays a crucial role in regulating water flow and providing recreational opportunities for the community.
Managed by a private owner, Marion Lake Dam is not regulated by the state and has a low hazard potential. Despite not being rated for condition assessment, the dam continues to serve its intended purposes effectively. While specific details about the spillway type and outlet gates are not listed, the dam's solid construction and strategic location on TR-East Fork Big Creek highlight its importance in water resource management and climate resilience efforts in the area. As a notable feature in the Rock Island District, Marion Lake Dam stands as a testament to effective infrastructure development for both human and environmental needs.
Year Completed |
1955 |
Dam Height |
30 |
River Or Stream |
TR-EAST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
60 |
Nid Storage |
96 |
Structural Height |
30 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
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.
Marion Lake Dam