Sfm1 Mosaic is an earth dam located in Polk County, Florida, built in 1985. It carries a Significant hazard potential classification.
Dam profile
NID height · 57 ft57 ft tall and 21,950 ft long, taller than 94% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Sfm1 Mosaic
The primary purpose of Sfm1 Mosaic 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 Peace River near Fort Meade.
The dam stands 57 feet tall and stretches 21,950 feet across, creates a reservoir covering 654 acres, has a maximum storage capacity of 37,000 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1985, the structure is 41 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. An emergency action plan is in place for this dam. The most recent inspection on record was 01/23/2006. That was over 20 years ago.
At 57 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Fort Meade |
| River/Stream | Peace River |
| Coordinates | 27.64850, -81.71160 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 57 ft |
| Dam Height | 55 ft |
| Dam Length | 21,950 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 37,000 acre-ft |
| Max Storage | 37,000 acre-ft |
| Normal Storage | 35,970 acre-ft |
| Surface Area | 654 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 80 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 01/23/2006 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL11047 |
| Federal ID | FL11047 |
| More Info | State Dam Safety Program |