Coronet No. 3 is an earth dam located in Hillsborough, Florida, built in 1930. It carries a Low hazard potential classification.
Dam profile
NID height · 97 ft97 ft tall and 4,000 ft long, taller than 98% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Coronet No. 3
Coronet No. 3 is a dam in Hillsborough, Florida. The dam is owned by The Mosaic Company (private). It impounds the Alafia near Plant City.
The dam stands 97 feet tall and stretches 4,000 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 184 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 07/24/2003. That was over 23 years ago.
At 97 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 | Plant City |
| River/Stream | Alafia |
| Coordinates | 28.00080, -82.08380 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 97 ft |
| Dam Height | 8 ft |
| Dam Length | 4,000 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 184 acre-ft |
| Max Storage | 184 acre-ft |
| Normal Storage | 138 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 14 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/24/2003 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL11081 |
| Federal ID | FL11081 |
| More Info | State Dam Safety Program |