Indian Lake (Str. #6) Reservoir Report

Last Updated: December 5, 2025

Indian Lake (Str.


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Summary

#6) in Indiana is a Federal-owned dam constructed in 1968 for flood risk reduction purposes. This earth dam, with a height of 79 feet and a length of 900 feet, sits on the Middle Fork Anderson River in Perry County. The dam has a storage capacity of 3,820 acre-feet and a normal storage of 1,708 acre-feet, serving as a crucial structure for managing water resources in the region.

The dam's spillway type is uncontrolled, with a spillway width of 170 feet, and the outlet gates are also uncontrolled. The hazard potential of Indian Lake (Str. #6) is rated as high, with a moderate risk assessment score of 3. Despite not having a condition assessment, the dam has been inspected regularly, with the last inspection conducted in December 2018. While the dam is primarily used for flood risk reduction, it also offers recreational opportunities for visitors to enjoy the surrounding area.

Overall, Indian Lake (Str. #6) stands as a significant infrastructure in Indiana, playing a key role in water resource management and flood protection in the region. With its strategic location on the Middle Fork Anderson River, the dam not only safeguards against potential flooding but also provides a recreational space for locals and visitors to appreciate the natural beauty of Perry County. The dam's design by the USDA and its ownership by the Forest Service highlight the collaborative efforts in ensuring the safety and functionality of this essential water structure.

Year Completed

1968

Dam Length

900

Dam Height

79

River Or Stream

MIDDLE FK ANDERSON RIVER

Primary Dam Type

Earth

Surface Area

149

Hydraulic Height

60

Drainage Area

17

Nid Storage

3820

Structural Height

79

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

79
       
Seasonal Comparison

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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.