Gibsonton (nw)

Gibsonton (nw) is an earth dam located in Hillsborough, Florida. It carries a Significant hazard potential classification.

About Gibsonton (nw)

The primary purpose of Gibsonton (nw) 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 Archie Creek near Gibsonton.

The dam stands 16 feet tall and stretches 12,975 feet across, creates a reservoir covering 238 acres, has a maximum storage capacity of 1,217 acre-feet, and collects water from a drainage area of 0 square miles.

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.

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Significant HazardNot Rated ConditionEmergency Action Plan: No

Location

StateFlorida
CountyHillsborough
Nearest CityGibsonton
River/StreamArchie Creek
Coordinates27.87000, -82.38000

Physical Characteristics

Dam TypeEarth
NID Height16 ft
Dam Height11 ft
Dam Length12,975 ft

Storage & Hydraulics

NID Storage1,217 acre-ft
Max Storage1,217 acre-ft
Normal Storage800 acre-ft
Surface Area238 acres
Drainage Area0 sq mi
Max Discharge110 cfs
Spillway TypeNone

Ownership & Safety

PurposeTailings
OwnerTHE MOSAIC COMPANY
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentNot Rated
Emergency Action PlanNo

Identifiers

NID IDFL10031
Federal IDFL10031
More InfoState Dam Safety Program

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