Temple Terrace Cell D
Temple Terrace Cell D is an earth dam located in Hillsborough, Florida, built in 1970. It carries a Significant hazard potential classification.
About Temple Terrace Cell D
The primary purpose of Temple Terrace Cell D 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 Hillsborough River near Temple Terrace.
The dam stands 110 feet tall and stretches 11,200 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 3,400 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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. An emergency action plan is in place for this dam.
At 110 feet, this dam is taller than 98% of all dams in the United States.
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Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Temple Terrace |
| River/Stream | Hillsborough River |
| Coordinates | 28.15670, -82.13740 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 110 ft |
| Dam Height | 100 ft |
| Dam Length | 11,200 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 3,400 acre-ft |
| Max Storage | 3,400 acre-ft |
| Normal Storage | 3,000 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 64 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | THE MOSAIC COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL10117 |
| Federal ID | FL10117 |
| More Info | State Dam Safety Program |