Pinellas County commissioners voted Tuesday unanimously to seek $15 million in state grant money for aging pumps at the county’s main wastewater treatment plant — but the project’s own paperwork leaves an $11.8 million gap unaccounted for, and commissioners spent almost no time asking about it before signing off.

The vote authorizes the county to apply for a Resilient Florida grant through the Florida Department of Environmental Protection to overhaul the high-service pump station at the South Cross Bayou Advanced Water Reclamation Facility in St. Petersburg. Some of the pumps at the 7401 54th Ave. N. plant have been running for more than 30 years and, according to county documents, have reached the end of their useful lives and can no longer generate the water pressure the system needs.

If awarded, the $15 million grant would be matched dollar-for-dollar by the county, putting $30 million total toward replacing or adding seven pumps and related equipment — work the grant application says would cover about 56.6 million gallons of daily pumping capacity. The pumps push reclaimed water through the county’s South County Public Access Reuse system and support internal treatment processes at the plant itself.

But the $30 million figure in the grant application doesn’t match the number in the county’s own capital plan, which lists the total South Cross Bayou High Service Pump Station Improvements project at roughly $41.8 million, to be funded separately through the county’s Sewer Renewal and Replacement Fund. That leaves about $11.8 million in project costs that the documents presented to commissioners do not explain — a discrepancy that went unaddressed at Tuesday’s meeting.

Flood protection makes up a significant share of the scope. South Cross Bayou sits next to Joe’s Creek, and the grant application states the facility’s existing infrastructure sits below the 100-year flood elevation. A 2022 risk assessment found the entire site could be exposed to a 500-year flood event, risking saltwater damage to buildings and equipment and interrupting utility service. The plan calls for rebuilding the pump station building, floodproofing it and the electrical buildings above the 500-year flood line, sealing off points where pipes and wiring pass through walls, and rerouting how electrical service enters the structures.

Commissioners’ discussion before the unanimous vote was brief, limited mainly to a budgeting question from Office of Management and Budget Director Chris Rose, who confirmed the grant revenue and matching expenses would show up in the capital budget. No commissioner raised the gap between the $30 million grant scope and the $41.8 million total project cost.

Tuesday’s action does not guarantee the county will receive the money — it authorizes the application and commits Pinellas to its $15 million match if the state approves the grant. Whether taxpayers end up covering the full $41.8 million, and where that additional funding beyond the match will come from, remains an open question the county has yet to answer publicly.

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