Dwight Milligan Sr Dam Reservoir Report
Nearby: Fitz Farms Lake Dam Tuggle Lake Dam
Last Updated: December 13, 2025
Dwight Milligan Sr Dam, located in Cainsville, Missouri, is a privately owned structure designed by the USDA NRCS for grade stabilization purposes along the TR-T Brush river.
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Summary
Completed in 2002, this earth dam stands at a height of 29 feet with a hydraulic height matching that figure. Its primary purpose is grade stabilization, with a low hazard potential and moderate risk assessment. The dam spans 266 feet in length and has a storage capacity of 19 acre-feet, serving a drainage area of 74.88 square miles.
Despite its uncontrolled spillway type and lack of outlet gates, Dwight Milligan Sr Dam poses a low risk with a hazard potential classified as such. The dam's condition assessment remains unrated, with no recent inspection data available since November 2002. The structure's emergency action plan status is unspecified, suggesting a need for further evaluation and preparedness measures. The dam's risk management measures and inundation maps preparedness also require attention to ensure the safety and resilience of the surrounding area in the event of a flood or emergency situation.
Water resource and climate enthusiasts are likely to find Dwight Milligan Sr Dam an intriguing subject for study and monitoring, given its unique design and location in Harrison County, Missouri. With its modest size and purposeful construction, the dam offers a case study in how earth structures can effectively stabilize grades and manage water flow in a rural setting. The presence of a moderate risk assessment underscores the importance of ongoing monitoring and maintenance to ensure the dam's continued safety and functionality in the face of potential hazards.
Year Completed |
2002 |
Dam Length |
266 |
Dam Height |
29 |
River Or Stream |
TR-T BRUSH |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
29 |
Drainage Area |
74.88 |
Nid Storage |
19 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
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.
Dwight Milligan Sr Dam