Las Brisas Dam Reservoir Report

Last Updated: December 21, 2025

Las Brisas Dam, located in Eureka, Missouri, was completed in 1970 and serves as a recreational facility for water resource and climate enthusiasts.


°F

°F

mph

Wind

%

Humidity

Summary

The dam, primarily made of earth and stone, stands at a height of 46 feet and has a length of 470 feet, creating a reservoir with a storage capacity of 173 acre-feet. The dam is regulated by the DAM AND RESERVOIR SAFETY PROGRAM and is inspected regularly to ensure its safety and functionality.

With a high hazard potential and a satisfactory condition assessment, Las Brisas Dam poses moderate risk, as indicated by a risk assessment rating of 3. Despite this, the dam meets regulatory guidelines and has emergency action plans in place. The dam's spillway, with a width of 40 feet, helps to control water levels in the reservoir and prevent flooding downstream. The dam is also situated on a tributary of Little Fox Creek, providing additional opportunities for water-related activities and recreation.

Overall, Las Brisas Dam offers a valuable resource for the community, providing both recreational opportunities and essential water storage capacity. With its strategic location in Franklin County, Missouri, and its regulated operation, the dam stands as a testament to responsible water management practices and serves as a focal point for water resource and climate enthusiasts to enjoy and appreciate.

Year Completed

1970

Dam Length

470

Dam Height

46

River Or Stream

TRIBUTAR OF LITTLE FOX CREEK

Primary Dam Type

Earth

Surface Area

9

Drainage Area

77

Nid Storage

173

Structural Height

46

Outlet Gates

None

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

46
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.