Hosterman Lake Dam
Hosterman Lake Dam is an earth dam located in Clark County, Ohio, built in 1938. It carries a Low hazard potential classification and has a fair condition assessment.
About Hosterman Lake Dam
The primary purpose of Hosterman Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Clark County Park District (local government). It impounds the Tributary To Mad River near Snyderville.
The dam stands 28 feet tall and stretches 520 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 140 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1938, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 12/10/2024.
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Location
| State | Ohio |
| County | Clark |
| Nearest City | Snyderville |
| River/Stream | Tributary To Mad River |
| Coordinates | 39.91222, -83.90444 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 520 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 140 acre-ft |
| Max Storage | 140 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,678 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Clark County Park District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 12/10/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH00981 |
| Federal ID | OH00981 |
| More Info | State Dam Safety Program |