Detwilder Lake Dam Reservoir Report
Last Updated: January 12, 2026
Detwilder Lake Dam, located in Sullivan, Missouri, was completed in 1969 and serves primarily for recreation and water supply purposes.
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Summary
This privately-owned Earth dam stands at a height of 34 feet and has a storage capacity of 127 acre-feet. The dam is situated on TR-LOCUST CREEK, within the Rock Island District, and is managed by the primary owner, a private entity.
Despite being categorized as having a low hazard potential and not being state-regulated, Detwilder Lake Dam remains an important feature in the local water resource infrastructure. With a drainage area of 80 square miles and a surface area of 7 acres, the dam contributes to the conservation and management of water resources in the region. Climate and water resource enthusiasts may find interest in exploring the recreational opportunities offered by the dam, as well as its role in supporting local water supply needs.
While the dam's condition assessment is currently not rated, ongoing inspections and emergency preparedness measures are essential for ensuring the safety and integrity of the structure. As water resources become increasingly important in the face of climate change, the significance of infrastructure like Detwilder Lake Dam in supporting sustainable water management practices cannot be understated. Its location, design, and purpose make it a valuable asset for both recreational enjoyment and water conservation efforts in the region.
Year Completed |
1969 |
Dam Height |
34 |
River Or Stream |
TR-LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
80 |
Nid Storage |
127 |
Structural Height |
34 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Medicine Creek Near Laredo
|
63cfs |
Locust Creek Near Linneus
|
113cfs |
Chariton River At Novinger
|
337cfs |
Thompson River At Trenton
|
362cfs |
Chariton River At Livonia
|
45cfs |
Grand River At Chillicothe
|
361cfs |
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.
Detwilder Lake Dam