Troublesome Creek Watershed Dam S- 66 Reservoir Report
Last Updated: December 5, 2025
Located in the heart of Lewis County, Missouri, Troublesome Creek Watershed Dam S-66, also known as Str S-66, stands as a vital structure designed by the USDA NRCS to address flood risk reduction in the region.
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Summary
Completed in 1988, this earth-type dam with stone core and soil foundation measures 25 feet in height and spans 480 feet in length, offering a critical storage capacity of 101 acre-feet to help manage the flow of Troublesome Creek. With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in safeguarding the surrounding community from potential flooding events.
Situated in the picturesque city of Steffenville, this dam is managed by the local government and falls under the jurisdiction of the state of Missouri. Despite not being regulated or inspected by the state, Troublesome Creek Watershed Dam S-66 remains a key infrastructure project for flood risk mitigation in the area. With a spillway width of 30 feet and an uncontrolled spillway type, the dam is equipped to handle a maximum discharge of 180 cubic feet per second, ensuring the safety and protection of the residents living downstream.
As water resource and climate enthusiasts, understanding the importance and functionality of Troublesome Creek Watershed Dam S-66 is paramount in appreciating the efforts made to enhance the resilience of the local community against natural disasters. With its strategic location along TR-Troublesome Creek and its significant storage capacity, this dam serves as a testament to the collaborative efforts between local government and the USDA NRCS in safeguarding lives and properties from the impact of flooding events in the region.
Year Completed |
1988 |
Dam Length |
480 |
Dam Height |
25 |
River Or Stream |
TR-TROUBLESOME CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
25 |
Drainage Area |
150 |
Nid Storage |
101 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Fabius River Near Taylor
|
12cfs |
Wyaconda River Above Canton
|
13cfs |
North River At Palmyra
|
21cfs |
Salt River Near Shelbina
|
30cfs |
Salt River At Hagers Grove
|
1cfs |
Bear Creek Near Marcelline
|
5cfs |
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.
Troublesome Creek Watershed Dam S- 66