Truman Harless Lake Dam Reservoir Report
Last Updated: December 20, 2025
Truman Harless Lake Dam, located in Morgan, Indiana, is a privately owned structure that serves as a recreational space for water resource and climate enthusiasts.
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Summary
Completed in 1976, this earth dam stands at a height of 41 feet and has a length of 500 feet, creating a surface area of 2.7 acres and a storage capacity of 41 feet. Despite its low hazard potential, the dam is currently assessed to be in poor condition, with its last inspection conducted in 2016.
Situated on Sycamore Creek, Truman Harless Lake Dam is regulated by the Indiana Department of Natural Resources and complies with state permitting, inspection, and enforcement requirements. The dam lacks a spillway and outlet gates, posing a risk of high inundation in the event of a breach. While the dam's risk assessment is rated as high, it remains a popular spot for outdoor activities and wildlife observation, attracting visitors to its serene waters and surrounding natural beauty.
As stakeholders continue to monitor and assess the condition of Truman Harless Lake Dam, it serves as a vital resource for recreation in the area, offering opportunities for boating, fishing, and relaxation. With a focus on risk management measures and maintaining safety protocols, this dam stands as a unique blend of human engineering and natural beauty, making it a point of interest for water resource and climate enthusiasts alike.
Year Completed |
1976 |
Dam Length |
500 |
Dam Height |
41 |
River Or Stream |
SYCAMORE CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.7 |
Hydraulic Height |
41 |
Drainage Area |
0.03 |
Nid Storage |
41 |
Structural Height |
41 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
41 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Truman Harless Lake Dam