Blue Rock Lake Dam
Blue Rock Lake Dam is an earth dam located in Muskingum County, Ohio, built in 1937. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Blue Rock Lake Dam
The primary purpose of Blue Rock Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Odnr, Division Of Parks & Watercraft (state). It impounds the Manns Fork near Philo.
The dam stands 31 feet tall and stretches 385 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 369 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1937, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 10/25/2023.
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 Ohio 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 | Ohio |
| County | Muskingum |
| Nearest City | Philo |
| River/Stream | Manns Fork |
| Coordinates | 39.81722, -81.85056 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 385 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 369 acre-ft |
| Max Storage | 369 acre-ft |
| Normal Storage | 173 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 10,081 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | ODNR, Division of Parks & Watercraft |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/25/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH00061 |
| Federal ID | OH00061 |
| More Info | State Dam Safety Program |