Samanna Dam is an earth dam located in Warren County, Ohio, built in 1992. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 24 ft24 ft tall and 540 ft long. 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 Samanna Dam
The primary purpose of Samanna Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Wm. A. Natorp Co.. It impounds the Polk Run near Montgomery.
The dam stands 24 feet tall and stretches 540 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1992, the structure is 34 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 04/03/2024.
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Location
| State | Ohio |
| County | Warren |
| Nearest City | Montgomery |
| River/Stream | Polk Run |
| Coordinates | 39.31222, -84.33444 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 540 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 38 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,700 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Wm. A. Natorp Co. |
| Owner Type | Not Listed |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/03/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH02801 |
| Federal ID | OH02801 |
| More Info | State Dam Safety Program |