Leak at wastewater pond prompts evacuations

MIAMI (AP) — Florida Governor Ron DeSantis declared a state of emergency on Saturday after a significant leak at a large pond of wastewater threatened to flood roads and burst a system that stores polluted waters. Officials in Florida ordered more than 300 homes to be evacuated and closed off a highway on Saturday near the large reservoir in the Tampa Bay area north of Bradenton.

Residents who live around the Piney Point reservoir received an alert via text saying to leave the area immediately because the collapse was “imminent”. Authorities expanded the evacuation area later to include more homes, but said they were not planning to open shelters.

The Florida Department of Environmental Protection said the leak was detected on Friday in one of the walls of a 33-hectare pond that has a depth of eight metres and holds millions of litres of water containing phosphorus and nitrogen from an old phosphate plant.

Officials brought in rocks and materials to plug the hole in the pond but the attempt was unsuccessful.

Manatee County Administrator Scott Hopes said at a press conference on Saturday that the most pressing concern is that the water could flood the area, which he said was agricultural and low in population density.

The old Piney Point phosphate mine where a leak was discovered at its wastewater pond. PHOTO: AP

“We are talking about the potential of about 2.3 billions litres within a matter of seconds and minutes leaving that retention pool and going around the surrounding area,” Hopes said.

Workers have been pumping out thousands of litres per second at the site to bring the volume down in the event the pond bursts.

Pumping the entire pond would take 10 to 12 days. Others have been working to chart the path to control how the water flows from the pond into the bay. DeSantis’ declaration of a state of emergency allocates more pumps and cranes to the area. The owner, HRK Holdings, did not respond to a request for comment on Saturday.

The pond where the leak was discovered is at the old Piney Point phosphate mine, sitting in a stack of phosphogypsum, a waste product from manufacturing fertiliser that is radioactive. It contains small amounts of naturally occurring radium and uranium and the stacks can also release large concentrations of radon gas. Hopes says that if the pond collapses, there is a risk it could destabilise the walls of other areas.