Green Lake Dam Reservoir Report

Last Updated: December 5, 2025

Green Lake Dam, located in Brown County, Indiana, is a privately owned structure with a primary purpose of recreation.


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Summary

Built in 1964, this earth dam stands at a height of 51 feet and has a length of 856 feet, creating a reservoir with a normal storage capacity of 860 acre-feet and a maximum storage capacity of 1328 acre-feet. The dam is situated on an unnamed tributary of North Fork Salt Creek and is regulated by the Indiana Department of Natural Resources.

With a hazard potential rated as high and a fair condition assessment as of 2004, Green Lake Dam is classified as having a moderate risk level. The spillway of the dam is uncontrolled and has a width of 190 feet, with a maximum discharge capacity of 2339 cubic feet per second. Despite its risk level, the dam has not undergone any modifications in recent years, with the last inspection conducted in September 2019. For water resource and climate enthusiasts, Green Lake Dam presents a compelling case study in dam safety and management within the context of recreational water infrastructure.

Year Completed

1964

Dam Length

856

Dam Height

51

River Or Stream

UNNAMED TRIBUTARY NORTH FORK SALT CREEK

Primary Dam Type

Earth

Surface Area

51

Hydraulic Height

51

Drainage Area

1.63

Nid Storage

1328

Structural Height

51

Outlet Gates

None

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

51
       
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.