Graybrook Lake Dam
Graybrook Lake Dam is an earth dam located in Owen County, Indiana, built in 1945. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Graybrook Lake Dam
The primary purpose of Graybrook Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Graybrook Lake Conservancy District (local government). It impounds the Unnamed Tributary East Fork Fish Creek.
The dam stands 23 feet tall and stretches 340 feet across, creates a reservoir covering 31 acres, has a maximum storage capacity of 316 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1945, the structure is well-established, with more than 75 years of service.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 07/21/2020.
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 | Owen |
| River/Stream | Unnamed Tributary East Fork Fish Creek |
| Coordinates | 39.36544, -86.87990 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 340 ft |
| Year Completed | 1945 (81 years old) |
Storage & Hydraulics
| NID Storage | 316 acre-ft |
| Max Storage | 316 acre-ft |
| Normal Storage | 234 acre-ft |
| Surface Area | 31 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 531 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | GRAYBROOK LAKE CONSERVANCY DISTRICT |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/21/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IN00389 |
| Federal ID | IN00389 |
| More Info | State Dam Safety Program |