Florida seeks to avoid ‘catastrophic’ collapse of wastewater pond

Crews were working to prevent the collapse of a large wastewater pond in the Tampa Bay vicinity while evacuating the area to avoid a “catastrophic flood,” Florida Gov. Ron DeSantis said Sunday.

Manatee County officials said the latest models showed that a breach at the old phosphate plant reservoir had the potential to gush out 340 million gallons of water in a matter of minutes, risking a 20-foot-high wall of water. Throughout the day, the volume had decreased to below 300 million.

“What we are looking at now is trying to prevent and respond to, if need be, a real catastrophic flood situation,” DeSantis said at a news conference after flying over the old Piney Point phosphate mine.

Authorities closed off portions of U.S. Highway 41 and ordered evacuations of 316 homes. Some families were placed in local hotels.

California

A formerly homeless artist made a gift to Los Angeles. What happened next was a surprise

It began as an inspiring idea: What if a formerly homeless artist was commissioned to paint utility boxes in Los Feliz?

April 4, 2021

A local jail one mile away from the 77-acre pond is not being evacuated, but officials are moving people and staff to the second story and putting sandbags on the ground floor. Acting Manatee County Administrator Scott Hopes said the models showed the area could be covered with one to five feet of water, and the second floor is 10 feet above ground.

County officials say well water remains unaffected and there is no threat to Lake Manatee, the area’s primary source of drinking water.

The Florida Department of Environmental Protection says the water in the pond is primarily saltwater mixed with wastewater and stormwater. It has elevated levels of phosphorous and nitrogen and is acidic but isn’t expected to be toxic, the agency says.

Crews have been discharging water since the pond began leaking in late March. On Friday, a significant leak that was detected escalated the response and prompted the first evacuations, and the declaration of a state of emergency followed on Saturday. A portion of the containment wall in the reservoir shifted, leading officials to think a collapse could occur at any time.

Hopes, the acting county administrator, said Sunday that, with new state resources, crews will be nearly doubling the amount of water being pumped out of the pond and taken to Port Manatee. Currently about 22,000 gallons of water are being discharged per minute, and Hopes said he expected the risk of collapse to decrease by Tuesday.

Early Sunday, officials saw an increase in the amount of water leaking out, but Hopes says it seems to have plateaued. The water running out on its own is flowing to a creek that leads to Cockroach Bay, an aquatic preserve in the Tampa Bay north of the facility.

“Looking at the water that has been removed and the somewhat stability of the current breach, I think the team is much more comfortable today than we were yesterday,” he said. “We are not out of the critical area yet.”

Hopes said he could not rule out that a full breach could destabilize the walls of the other ponds at the Piney Point site.

Noah Valenstein, secretary of the Florida Department of Environmental Protection, said another pond had higher levels of metals.

“The radiologicals are still below surface water discharge standards. So, again, this is not water we want to see leaving the site,” he said.

The U.S. Environmental Protection Agency has a coordinator on the scene working with emergency management to provide support as necessary, said EPA spokeswoman Brandi Jenkins.

“We are closely monitoring the ongoing situation and are in close communication with Governor DeSantis’ office, as well as the Florida Department of Environmental Protection,” she said in an email.

Calls to the owner of the site, HRK Holdings, for comments went unanswered Saturday and Sunday.

The ponds sit in stacks of phosphogypsum, a solid radioactive byproduct from manufacturing fertilizer. State authorities say the water in the breached pond is not radioactive.

But the EPA says too much nitrogen in the wastewater causes algae to grow faster, leading to fish kills. Some algal blooms can also harm humans who come into contact with polluted waters or eat tainted fish.

Environmental groups urged the federal government this weekend to step in to halt sending more wastewater to the existing so-called gypsum stacks and halting the creation of more phosphogypsum, which is left behind when phosphate rock is mined to produce fertilizer.

“We hope the contamination is not as bad as we fear, but are preparing for significant damage to Tampa Bay and the communities that rely on this precious resource,” Justin Bloom, founder of the Sarasota-based nonprofit organization Suncoast Waterkeeper, said in a statement.