Hil18 is an earth dam located in Hillsborough, Florida. It carries a Undetermined hazard potential classification.
About Hil18
The primary purpose of Hil18 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 Unnamed Pond near Plant City.
The dam stands 12 feet tall and stretches 13,675 feet across, creates a reservoir covering 67 acres, and has a maximum storage capacity of 3,292 acre-feet.