Tamarack Dam Reservoir Report

Last Updated: December 11, 2025

Tamarack Dam, located in Byrnesville, Missouri, was completed in 1964 and stands at a height of 29 feet.


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Summary

With a primary purpose of recreation, this private-owned earth dam overlooks the TR-Sand Creek and provides a storage capacity of 248 acre-feet. Despite being classified as having a high hazard potential, the dam's condition assessment remains unrated since its last inspection in 1978.

The dam's location in Jefferson County, Missouri, offers a tranquil setting for water resource and climate enthusiasts to explore. With a surface area of 16 acres and a drainage area of 128 square miles, Tamarack Dam serves as a vital recreational spot for the local community. However, its lack of state regulation and inspection raises concerns about its long-term safety and maintenance, especially given its high hazard potential.

As a notable structure in the Kansas City District, Tamarack Dam provides valuable insights into the management of water resources and the impact of climate on infrastructure. The dam's unique design, including a buttress core and unknown foundation, presents an opportunity for further study and evaluation. With its rich history and scenic surroundings, Tamarack Dam is a must-visit destination for those passionate about water resource management and climate resilience.

Year Completed

1964

Dam Height

29

River Or Stream

TR-SAND CREEK

Primary Dam Type

Earth

Surface Area

16

Drainage Area

128

Nid Storage

248

Structural Height

29

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

29
       
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.