Middle Fork Of Anderson River - No. 2 Reservoir Report

Last Updated: December 5, 2025

Middle Fork of Anderson River - No.


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Summary

2, also known as Mill Lake, is a key flood risk reduction structure located in Perry, Indiana. Owned by the federal government and designed by USDA NRCS, this earth dam stands at a height of 28 feet and spans 1200 feet in length. Completed in 1969, it serves the primary purpose of flood risk reduction for the surrounding area, with a normal storage capacity of 108 acre-feet and a maximum storage capacity of 2026 acre-feet.

Situated on the TR-Little Sulpher Creek, this dam has a low hazard potential but is currently assessed to be in poor condition as of 2000. Despite its moderate risk level, the structure has not been modified in recent years and lacks updated emergency action plans and inundation maps. With a last inspection date in 2005 and a scheduled inspection frequency of 5 years, there is a need for further risk assessment and management measures to ensure the safety and effectiveness of this important water resource infrastructure.

As climate change and extreme weather events continue to impact water resources, the Middle Fork of Anderson River - No. 2 plays a crucial role in mitigating flood risks in the region. With its outdated condition assessment and lack of modern emergency preparedness measures, there is a pressing need for investment and maintenance to ensure the long-term resilience of this vital structure in the face of evolving climate challenges.

Year Completed

1969

Dam Length

1200

Dam Height

28

River Or Stream

TR-LITTLE SULPHER CREEK

Primary Dam Type

Earth

Surface Area

40

Hydraulic Height

28

Drainage Area

7

Nid Storage

2026

Structural Height

28

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

28
       
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.