Lloyd Hahn Lake Dam is an earth dam located in Vanderburgh County, Indiana, built in 1959. It carries a High hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 34 ft34 ft tall and 575 ft long, taller than 78% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lloyd Hahn Lake Dam
The primary purpose of Lloyd Hahn Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Hahn Lake LLC (private). It impounds the Unnamed Tributary Bayou Creek near West Franklin.
The dam stands 34 feet tall and stretches 575 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 220 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 12/11/2018. That was 7 years ago, which is on the longer end for a high-hazard structure.
At 34 feet, this dam is taller than 78% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Indiana dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Indiana |
| County | Vanderburgh |
| Nearest City | West Franklin |
| River/Stream | Unnamed Tributary Bayou Creek |
| Coordinates | 37.92989, -87.67184 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 31 ft |
| Dam Length | 575 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 220 acre-ft |
| Max Storage | 220 acre-ft |
| Normal Storage | 153 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 260 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Hahn Lake LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 12/11/2018 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IN00465 |
| Federal ID | IN00465 |
| More Info | State Dam Safety Program |