Settling Area No 1
Settling Area No 1 is an earth dam located in Polk County, Florida, built in 1962. It carries a Significant hazard potential classification.
About Settling Area No 1
The primary purpose of Settling Area No 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 The Mosaic Company (private). It impounds the North Prong Alafia River near Mulberry.
The dam stands 18 feet tall and stretches 2,350 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 51 acre-feet. Completed in 1962, the structure is well into its service life at over 50 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Florida |
| County | Polk |
| Nearest City | Mulberry |
| River/Stream | North Prong Alafia River |
| Coordinates | 27.85000, -81.94000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 2,350 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 3 acres |
Ownership & Safety
| Purpose | Tailings |
| Owner | THE MOSAIC COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00630 |
| Federal ID | FL00630 |
| More Info | State Dam Safety Program |