Albert Unerstall Reservoir Report

Last Updated: December 8, 2025

Albert Unerstall is a private earth dam located in Franklin County, Missouri, along the TR-Bourbeuse River.


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Summary

Built in 1999 by the USDA NRCS, this dam serves primarily for grade stabilization and recreation purposes. Standing at a structural height of 30 feet and a hydraulic height of 25 feet, it has a dam length of 420 feet and a storage capacity of 63 acre-feet.

With a low hazard potential and a moderate risk assessment rating, Albert Unerstall is a crucial structure for water resource management in the area. Despite not being state-regulated or inspected, the dam plays a significant role in flood control and water storage, especially during times of heavy rainfall. The presence of an uncontrolled spillway and a surface area of 6.1 acres further highlight its importance in managing water flow and mitigating potential risks to downstream areas.

Although not currently rated for its condition, Albert Unerstall remains a vital asset in the region's water infrastructure. Its proximity to the Bourbeuse River and its role in grade stabilization make it an essential element for climate enthusiasts and water resource professionals interested in sustainable water management practices in Missouri.

Year Completed

1999

Dam Length

420

Dam Height

26

River Or Stream

TR-BOURBEUSE RIVER

Primary Dam Type

Earth

Surface Area

6.1

Hydraulic Height

25

Drainage Area

211.2

Nid Storage

63

Structural Height

30

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

30
       
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.