Springer-Sharon Site Ca-33-H-55-6 Reservoir Report
Last Updated: December 12, 2025
Located in Chillicothe, Missouri, the Springer-Sharon Site Ca-33-H-55-6, also known as the Jarol Arney Structure, is a Grade Stabilization dam built in 1977 along the TR-Thompson River.
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Summary
This Earth dam stands at a height of 30 feet with a hydraulic height of 30 feet and a structural height of 32 feet, stretching 320 feet in length. With a storage capacity of 23 acre-feet and a surface area of 2 acres, the dam serves the primary purpose of Grade Stabilization to control water flow and prevent erosion.
Managed by the Rock Island District of the US Army Corps of Engineers, the Springer-Sharon Site has a low hazard potential and is considered to be in a moderate risk category. Despite its age, the dam's condition assessment is currently not rated, and there have been no recent inspections or evaluations. With a maximum discharge of 80 cubic feet per second and an uncontrolled spillway design, the dam plays a crucial role in managing water levels and protecting the surrounding area from potential flooding events.
While the dam does not have any associated locks or outlet gates, its location within the Thompson River watershed contributes to the overall water resource management in the region. As water resource and climate enthusiasts continue to monitor and assess the impact of climate change on water infrastructure, the Springer-Sharon Site serves as a reminder of the importance of maintaining and upgrading aging dams to ensure the safety and sustainability of water resources for future generations.
Year Completed |
1977 |
Dam Length |
320 |
Dam Height |
30 |
River Or Stream |
TR-THOMPSON RIVER |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
30 |
Drainage Area |
96 |
Nid Storage |
23 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
East Fork Big Creek Near Bethany
|
4cfs |
Thompson River At Trenton
|
143cfs |
Grand River Near Gallatin
|
76cfs |
Medicine Creek Near Laredo
|
20cfs |
Thompson River At Davis City
|
22cfs |
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.
Springer-Sharon Site Ca-33-H-55-6