Slocum Lake Dam Reservoir Report

Last Updated: December 5, 2025

Located in Wauconda, Illinois, the Slocum Lake Dam stands as a vital structure along the Slocum Lake Ditch, serving primarily for recreational purposes since its completion in 1983.


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Summary

Designed by Richard A. Miller & Assoc., this private-owned earth dam boasts a modest height of 8 feet and a length of 30 feet, providing a maximum storage capacity of 900 acre-feet with a normal storage level of 760 acre-feet.

Despite its low hazard potential, the dam is regulated, permitted, inspected, and enforced by the Illinois Department of Natural Resources, ensuring its safety and compliance with state regulations. With a controlled spillway type and other controlled outlet gates, the dam's risk assessment ranks very high, emphasizing the need for proper risk management measures to mitigate potential threats and ensure the safety of the surrounding community and environment. For water resource and climate enthusiasts, Slocum Lake Dam represents a significant piece of infrastructure that plays a crucial role in both water management and recreational activities in the area.

Year Completed

1983

Dam Length

30

Dam Height

8

River Or Stream

SLOCUM LAKE DITCH

Primary Dam Type

Earth

Nid Storage

900

Outlet Gates

Other Controlled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

8
       
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.