Hahn Reservoir Dam Reservoir Report
Last Updated: December 5, 2025
Hahn Reservoir Dam, located in Ripley, Indiana, serves as a critical water supply source for the local government.
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Summary
Completed in 1955, this earth dam stands at 23 feet high with a length of 250 feet, creating a reservoir with a storage capacity of 79 acre-feet. With a primary purpose of water supply, the dam also offers recreational opportunities within its 7.44-acre surface area.
Despite its significant hazard potential and poor condition assessment, Hahn Reservoir Dam is state-regulated and subject to regular inspections, permitting, and enforcement by the Indiana Department of Natural Resources. The dam's location on Little Laughery Creek, within the Louisville District, underscores its importance for water management in the region. While lacking a spillway, the dam still serves a vital role in controlling water flow and storage.
With a high risk assessment rating and limited risk management measures in place, Hahn Reservoir Dam remains a focal point for water resource and climate enthusiasts. As conservation efforts continue to address its structural and safety concerns, the dam's role in water supply and recreation underscores the need for ongoing monitoring and maintenance to ensure its long-term viability and resilience in the face of changing environmental conditions.
Year Completed |
1955 |
Dam Length |
250 |
Dam Height |
23 |
River Or Stream |
LITTLE LAUGHERY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7.44 |
Hydraulic Height |
23 |
Drainage Area |
0.06 |
Nid Storage |
79 |
Structural Height |
23 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
23 |
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.
Hahn Reservoir Dam