Lloyd Hahn Lake Dam Reservoir Report
Nearby: Woodland Lake Dam Dogwood Lake Dam
Last Updated: December 13, 2025
Lloyd Hahn Lake Dam, located in Vanderburgh County, Indiana, is a privately-owned structure designed by the USDA NRCS for recreational purposes.
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Summary
Completed in 1959, this earth dam stands at a height of 30.7 feet, with a hydraulic height of 30.6 feet and a structural height of 34 feet. The dam spans 575 feet in length and has a maximum storage capacity of 220 acre-feet, providing a surface area of 14.77 acres for recreational activities.
The dam, situated on an unnamed tributary of Bayou Creek, is regulated by the Indiana Department of Natural Resources and undergoes regular inspections for safety and compliance. With a hazard potential rated as high and a condition assessment of fair, Lloyd Hahn Lake Dam is considered to have a moderate risk level. Although there are no outlet gates, the dam features an uncontrolled spillway with a width of 42 feet to manage excess water flow. While the dam has not been modified in recent years, it continues to serve its primary purpose of recreation for the surrounding community.
Water resource and climate enthusiasts will be intrigued by the unique design and history of Lloyd Hahn Lake Dam, as well as its important role in providing recreational opportunities in the West Franklin area. As a privately-owned structure with state regulation and oversight, the dam's high hazard potential and fair condition assessment highlight the need for ongoing maintenance and risk management measures to ensure the safety of the surrounding environment and residents. Overall, Lloyd Hahn Lake Dam stands as a notable example of how dams can serve both practical and recreational purposes while requiring careful monitoring and maintenance to mitigate potential risks.
Year Completed |
1959 |
Dam Length |
575 |
Dam Height |
30.7 |
River Or Stream |
UNNAMED TRIBUTARY BAYOU CREEK |
Primary Dam Type |
Earth |
Surface Area |
14.77 |
Hydraulic Height |
30.6 |
Drainage Area |
0.23 |
Nid Storage |
220 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Creek Near Wadesville
|
2cfs |
Wabash River At New Harmony
|
6890cfs |
Pigeon Creek Near Fort Branch
|
2cfs |
Little Wabash River At Carmi
|
178cfs |
Ohio River At Old Shawneetown
|
259000cfs |
Patoka River Near Princeton
|
863cfs |
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.
Lloyd Hahn Lake Dam