Wrg-bl-010 is an earth dam located in Polk County, Florida, built in 1922. It carries a Significant hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 18,504 ft long, taller than 76% 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 Wrg-bl-010
The primary purpose of Wrg-bl-010 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 Lakeland.
The dam stands 33 feet tall and stretches 18,504 feet across, creates a reservoir covering 461 acres, has a maximum storage capacity of 12,500 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1922, the structure is over a century 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 01/20/2006. That was over 20 years ago.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Lakeland |
| River/Stream | Alafia River |
| Coordinates | 27.90490, -81.95440 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 30 ft |
| Dam Length | 18,504 ft |
| Year Completed | 1922 (104 years old) |
Storage & Hydraulics
| NID Storage | 12,500 acre-ft |
| Max Storage | 12,500 acre-ft |
| Normal Storage | 11,525 acre-ft |
| Surface Area | 461 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 40 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 01/20/2006 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL11035 |
| Federal ID | FL11035 |
| More Info | State Dam Safety Program |