Usac N4n
Usac N4n is an earth dam located in Polk County, Florida, built in 1985. It carries a Low hazard potential classification.
About Usac N4n
The primary purpose of Usac N4n 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 The Mosaic Company (private). It impounds the Mccullough Creek near Fort Meade.
The dam stands 17 feet tall and stretches 5,275 feet across, creates a reservoir covering 198 acres, has a maximum storage capacity of 2,200 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1985, the structure is 41 years old.
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. The most recent inspection on record was 01/20/2006. That was over 20 years ago.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Fort Meade |
| River/Stream | Mccullough Creek |
| Coordinates | 27.77270, -81.86440 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 15 ft |
| Dam Length | 5,275 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 2,200 acre-ft |
| Max Storage | 2,200 acre-ft |
| Normal Storage | 1,980 acre-ft |
| Surface Area | 198 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 3 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | THE MOSAIC COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 01/20/2006 |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL11039 |
| Federal ID | FL11039 |
| More Info | State Dam Safety Program |