Foxwood Lake Dam Reservoir Report

Last Updated: December 5, 2025

Foxwood Lake Dam, located in Allen County, Indiana, serves as a vital infrastructure for flood risk reduction along the Tiernan Ditch.


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Summary

Built in 2006 by D.A. Brown Engineering Consultants, this private-owned earth dam stands at a height of 10 feet and spans a length of 400 feet, with a maximum storage capacity of 140 acre-feet. The dam's spillway type is uncontrolled, with a spillway width of 50 feet, contributing to its satisfactory condition assessment and high hazard potential.

Despite its moderate risk assessment level, Foxwood Lake Dam has been deemed structurally sound and meets regulatory guidelines for inspection, maintenance, and enforcement by the Indiana Department of Natural Resources. The dam's emergency action plan status and risk management measures remain unspecified, highlighting a potential area for improvement in ensuring public safety and environmental protection in the event of a dam failure. Overall, Foxwood Lake Dam stands as a crucial component in the region's flood control infrastructure, warranting continued monitoring and proactive measures to mitigate potential risks and ensure its long-term reliability.

Year Completed

2006

Dam Length

400

Dam Height

10

River Or Stream

TIERNAN DITCH

Primary Dam Type

Earth

Surface Area

18.5

Drainage Area

2.38

Nid Storage

140

Structural Height

10

Outlet Gates

Slide (sluice gate)

Hazard Potential

High

Foundations

Soil

Nid Height

10
       
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.