Heinrichsmeyer Dam Reservoir Report
Nearby: Knittel Dam #2 Knittel Lake Dam
Last Updated: December 13, 2025
Heinrichsmeyer Dam, also known as Heinrichsmeyer Lake Dam, is a private-owned structure located in Callaway, Missouri, specifically in the city of Portland.
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Summary
Built in 1965 by designer Jack Knittel, this earth dam stands at a height of 37 feet and spans a length of 518 feet. The primary purpose of this dam is for recreation, with a normal storage capacity of 259 acre-feet and a maximum storage of 280 acre-feet.
The dam, situated on Bragg Branch, is regulated by the Dam and Reservoir Safety Program in Missouri, with state permitting, inspection, and enforcement in place. Despite being categorized as having a low hazard potential, the dam is assessed as being in satisfactory condition as of December 2007. With a moderate risk rating, it is important that risk management measures are continuously monitored and implemented to ensure the safety and integrity of Heinrichsmeyer Dam for both recreational and environmental purposes.
Water resource and climate enthusiasts will appreciate the valuable data associated with Heinrichsmeyer Dam, from its construction details to its storage capacity and risk assessment. This earth dam serves as a recreational hub in the area, offering opportunities for water-based activities while also highlighting the importance of effective dam management practices to mitigate potential risks and ensure public safety. As a key feature in the St. Louis District, Heinrichsmeyer Dam stands as a testament to the intersection of engineering, natural resources, and community enjoyment in the region.
Year Completed |
1965 |
Dam Length |
518 |
Dam Height |
37 |
River Or Stream |
BRAGG BRANCH |
Primary Dam Type |
Earth |
Surface Area |
24 |
Drainage Area |
314 |
Nid Storage |
280 |
Structural Height |
36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
37 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Missouri River At Hermann
|
28400cfs |
Missouri River At Jefferson City
|
30900cfs |
South Fork Salt River Above Santa Fe
|
59cfs |
Hinkson Creek At Columbia
|
1cfs |
Long Branch Near Santa Fe
|
134cfs |
Maries River At Westphalia
|
12cfs |
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.
Heinrichsmeyer Dam