Hap Cremean Lagoon #1 is an earth dam located in Franklin County, Ohio, built in 2011. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 14 ft14 ft tall and 1,000 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 Hap Cremean Lagoon #1
The primary purpose of Hap Cremean Lagoon #1 is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by City of Columbus (local government). It impounds the Big Walnut Creek - Offstream.
The dam stands 14 feet tall and stretches 1,000 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 232 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2011, the structure is relatively new.
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 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 12/21/2020.
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Location
| State | Ohio |
| County | Franklin |
| River/Stream | Big Walnut Creek - Offstream |
| Coordinates | 40.06389, -82.89417 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 1,000 ft |
| Year Completed | 2011 (15 years old) |
Storage & Hydraulics
| NID Storage | 232 acre-ft |
| Max Storage | 232 acre-ft |
| Normal Storage | 179 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | City of Columbus |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/21/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH03187 |
| Federal ID | OH03187 |
| More Info | State Dam Safety Program |