Key Harbour Estate Dam #1 Reservoir Report
Last Updated: December 19, 2025
Key Harbour Estate Dam #1, also known as Key Harbour #1 Lake Dam, is a privately owned structure located in St.
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Summary
Charles, Missouri. Completed in 1992, this earth dam stands at a height of 44 feet and spans 350 feet in length, serving primarily for flood risk reduction along the TR Peruque Creek. With a storage capacity of 15 acre-feet and a surface area of 2 acres, the dam has a high hazard potential but is currently deemed to be in satisfactory condition.
Managed by the DAM AND RESERVOIR SAFETY PROG in Missouri, Key Harbour Estate Dam #1 undergoes inspections every three years, with the latest assessment conducted in May 2015. The dam's spillway type is listed as uncontrolled, with a maximum discharge capacity of 143 cubic feet per second. Despite its high hazard potential, the risk assessment for the dam is considered moderate, with no specific risk management measures or emergency action plans specified. As a critical infrastructure for flood risk reduction in the area, the dam plays a crucial role in mitigating potential water-related disasters in the region.
Year Completed |
1992 |
Dam Length |
350 |
Dam Height |
44 |
River Or Stream |
TR PERUQUE CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
13 |
Nid Storage |
15 |
Structural Height |
44 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
44 |
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.
Key Harbour Estate Dam #1
Brittany Place 1, Lake Saint Louis