Coronet No. 3

Coronet No. 3 is an earth dam located in Hillsborough, Florida, built in 1930. It carries a Low hazard potential classification.

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 22 years ago.

At 97 feet, this dam is taller than 98% of all dams in the United States.

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Low HazardNot Rated ConditionEmergency Action Plan: Yes

Location

StateFlorida
CountyHillsborough
Nearest CityPlant City
River/StreamAlafia
Coordinates28.00080, -82.08380

Physical Characteristics

Dam TypeEarth
NID Height97 ft
Dam Height8 ft
Dam Length4,000 ft
Year Completed1930 (96 years old)

Storage & Hydraulics

NID Storage184 acre-ft
Max Storage184 acre-ft
Normal Storage138 acre-ft
Surface Area23 acres
Drainage Area0 sq mi
Max Discharge14 cfs
Spillway TypeControlled

Ownership & Safety

PurposeOther
OwnerTHE MOSAIC COMPANY
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentNot Rated
Last Inspection07/24/2003
Emergency Action PlanYes

Identifiers

NID IDFL11081
Federal IDFL11081
More InfoState Dam Safety Program

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