Green City Dam-Sect 18 Reservoir Report
Last Updated: December 12, 2025
Green City Dam-Sect 18, located in Sullivan, Missouri, along the TR-WEST YELLOW CREEK, is a local government-owned structure primarily designed for recreation and water supply purposes.
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Summary
Built in 1954, this earth dam stands at a height of 28 feet and has a storage capacity of 150 acre-feet. With a surface area of 10 acres and a drainage area of 75 square miles, the dam serves as a crucial resource for the Mystic community.
Despite its low hazard potential, the dam has not been rated for its condition assessment. It is not under state regulation or inspection, which raises concerns about its maintenance and safety standards. The structure's emergency preparedness, including the existence of an Emergency Action Plan (EAP), is also unclear. Given its importance for recreation and water supply, stakeholders should prioritize regular inspections, risk assessments, and the development of comprehensive emergency response protocols to ensure the safety and sustainability of Green City Dam-Sect 18 for the Mystic community and surrounding areas.
Year Completed |
1954 |
Dam Height |
28 |
River Or Stream |
TR-WEST YELLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
75 |
Nid Storage |
150 |
Structural Height |
28 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Chariton River At Novinger
|
68cfs |
Chariton River At Livonia
|
45cfs |
Locust Creek Near Linneus
|
27cfs |
Medicine Creek Near Laredo
|
17cfs |
Chariton River Near Moulton
|
34cfs |
Long Branch Creek Near Atlanta
|
6cfs |
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.
Green City Dam-Sect 18