Laylow Dam Reservoir Report
Last Updated: December 6, 2025
Laylow Dam, located in Gasconade, Missouri, is a privately owned structure designed by Joe Wilson, P.E.
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Summary
The dam, completed in 2002, stands at a height of 42 feet and serves primarily for recreational purposes. It is an earth dam with a buttress core type, built on rock and soil foundations. The reservoir created by the dam has a storage capacity of 697 acre-feet, with a normal storage level of 545 acre-feet.
The dam's spillway is uncontrolled with a width of 30 feet, and it is inspected regularly by the Dam and Reservoir Safety Program in Missouri. The condition assessment reported the dam as being in satisfactory condition with a low hazard potential. The risk assessment for Laylow Dam is moderate, indicating a level 3 risk. Overall, Laylow Dam provides a vital source of recreation and water resource management for the surrounding area, ensuring the safety and enjoyment of its visitors.
Year Completed |
2002 |
Dam Length |
960 |
Dam Height |
42 |
River Or Stream |
BLOCK BRANCH |
Surface Area |
29 |
Hydraulic Height |
38 |
Drainage Area |
224.4 |
Nid Storage |
697 |
Structural Height |
42 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
42 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bourbeuse River Near High Gate
|
1cfs |
Meramec River Near Sullivan
|
486cfs |
Meramec River Near Steelville
|
232cfs |
Gasconade River Near Rich Fountain
|
1010cfs |
Bourbeuse River At Union
|
110cfs |
Missouri River At Hermann
|
35400cfs |
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.
Laylow Dam