Peek-A-Boo Lake Dam Reservoir Report

Last Updated: December 5, 2025

Peek-A-Boo Lake Dam, also known as Lakeside Developers Dam, is a privately owned structure located in Washington, Indiana.


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Summary

Completed in 1963, this earth dam stands at a height of 52 feet and spans a length of 850 feet, creating a stunning surface area of 22.3 acres. The primary purpose of this dam is for recreation, offering a tranquil oasis for water resource and climate enthusiasts to enjoy.

Managed by the Indiana Department of Natural Resources, Peek-A-Boo Lake Dam is state regulated, inspected, and enforced to ensure its structural integrity and safety. With a normal storage capacity of 226 acre-feet and a maximum discharge rate of 85 cubic feet per second, this dam plays a crucial role in managing water resources in the surrounding area. Despite its high hazard potential, the dam is currently in satisfactory condition with a moderate risk assessment rating.

Surrounded by the picturesque landscape of the Unnamed Tributary South Fork Blue River, Peek-A-Boo Lake Dam provides a recreational haven for locals and visitors alike. With its uncontrolled spillway and rock foundation, this dam serves as both a functional water management structure and a breathtaking natural attraction, making it a must-visit destination for those passionate about water resources and climate conservation.

Year Completed

1963

Dam Length

850

Dam Height

52

River Or Stream

UNNAMED TRIBUTARY SOUTH FORK BLUE RIVER

Primary Dam Type

Earth

Surface Area

22.3

Hydraulic Height

48

Drainage Area

0.23

Nid Storage

410

Structural Height

52

Outlet Gates

None

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

52
       
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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.