Lake Heron Dam Reservoir Report
Last Updated: December 6, 2025
Lake Heron Dam, also known as Lake Ocie Dam, is a privately owned structure located in Bloomsdale, Missouri.
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Summary
Completed in 1966, this earth dam stands at a height of 44 feet and spans 1000 feet in length, creating a reservoir with a storage capacity of 1200 acre-feet. The dam primarily serves as a recreational area, offering water-based activities in its 65-acre surface area.
Despite its high hazard potential, Lake Heron Dam has been deemed to be in satisfactory condition as of its last assessment in 2007. The dam is regularly inspected by the state regulatory agency, with the most recent inspection conducted in September 2017. In the event of an emergency, the dam has an emergency action plan (EAP) in place, although details of its preparation and compliance with guidelines are not specified in the data.
With its beautiful setting along Establishment Creek and its significant storage capacity, Lake Heron Dam is a key feature in the water resource infrastructure of the area. Climate and water resource enthusiasts can appreciate the engineering and management efforts that go into ensuring the safety and recreational opportunities provided by this essential dam structure.
Year Completed |
1966 |
Dam Length |
1000 |
Dam Height |
44 |
River Or Stream |
ESTABLISHMENT CREEK |
Primary Dam Type |
Earth |
Surface Area |
65 |
Drainage Area |
6400 |
Nid Storage |
1200 |
Structural Height |
44 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
44 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big River Below Desloge
|
56cfs |
South Fork Saline Creek Near Perryville
|
10cfs |
Mississippi River At Chester
|
96900cfs |
Little St. Francis River At Fredericktown
|
1cfs |
Big River At Irondale
|
25cfs |
Big River Near Richwoods
|
207cfs |
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.
Lake Heron Dam