Mosaic Csa Bf4 is an earth dam located in Hillsborough, Florida, built in 1991. It carries a Significant hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 18,562 ft long, taller than 88% of U.S. dams with a recorded height. 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 Mosaic Csa Bf4
The primary purpose of Mosaic Csa Bf4 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 Alafia River near Bradley Junction.
The dam stands 42 feet tall and stretches 18,562 feet across, creates a reservoir covering 438 acres, has a maximum storage capacity of 17,500 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1991, the structure is 35 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 07/20/2005. That was over 21 years ago.
At 42 feet, this dam is taller than 88% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Bradley Junction |
| River/Stream | Alafia River |
| Coordinates | 27.73000, -82.09000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 40 ft |
| Dam Length | 18,562 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 17,500 acre-ft |
| Max Storage | 17,500 acre-ft |
| Normal Storage | 16,975 acre-ft |
| Surface Area | 438 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 320 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/20/2005 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL11019 |
| Federal ID | FL11019 |
| More Info | State Dam Safety Program |