Lake Windsor Dam Reservoir Report

Last Updated: December 5, 2025

Lake Windsor Dam, located in Bella Vista Village, Arkansas, stands as a vital structure regulating the flow of Tanyard Creek.


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Summary

Built in 1974, this private Earth-type dam serves primarily for recreational purposes, providing a serene backdrop for water enthusiasts and nature lovers alike. With a height of 85 feet and a storage capacity of 9,400 acre-feet, the dam ensures a steady water supply for various recreational activities while also managing flood risks in the area.

The dam's significant hazard potential underscores the importance of its regular inspections and maintenance, although its current condition remains unrated. With a drainage area of 11.3 square miles and a maximum discharge capacity of 38,000 cubic feet per second, the Lake Windsor Dam plays a crucial role in water resource management in Benton County, Arkansas. Its location within the Tulsa District of the US Army Corps of Engineers further highlights its strategic importance in the region.

Despite its private ownership, the Lake Windsor Dam falls under state regulation and oversight by the Arkansas Natural Resources Commission (ANRC). With a surface area of 220 acres and a structural height of 95 feet, this dam not only enhances the scenic beauty of the area but also serves as a key component in ensuring water security and environmental sustainability in the region. For water resource and climate enthusiasts, Lake Windsor Dam stands as a testament to the harmonious coexistence of human recreation and natural resource management.

Year Completed

1974

Dam Length

1228

Dam Height

85

River Or Stream

TANYARD CREEK

Primary Dam Type

Earth

Surface Area

220

Hydraulic Height

80

Drainage Area

11.3

Nid Storage

9400

Structural Height

95

Hazard Potential

Significant

Nid Height

95
       
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.