Horse Run No. 1 Dam Mb-42
Horse Run No. 1 Dam Mb-42 is an earth dam located in Morgan County, Ohio, built in 1952. It carries a Significant hazard potential classification and has a fair condition assessment.
About Horse Run No. 1 Dam Mb-42
Horse Run No. 1 Dam Mb-42 is a dam in Morgan, Ohio. The dam is owned by Odnr, Division Of Parks & Watercraft (state). It impounds the Horse Run near Unionville.
The dam stands 60 feet tall and stretches 750 feet across, creates a reservoir covering 27 acres, has a maximum storage capacity of 2,012 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1952, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/25/2023.
At 60 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Ohio |
| County | Morgan |
| Nearest City | Unionville |
| River/Stream | Horse Run |
| Coordinates | 39.73389, -81.73278 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 60 ft |
| Dam Height | 60 ft |
| Dam Length | 750 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 2,012 acre-ft |
| Max Storage | 2,012 acre-ft |
| Normal Storage | 225 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,414 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | ODNR, Division of Parks & Watercraft |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/25/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH00816 |
| Federal ID | OH00816 |
| More Info | State Dam Safety Program |