St. Augustine Cuts Ribbon on Court Theophelia Flood Fix and City's First Bioswale

The City of St. Augustine holds a public ribbon-cutting today, Friday, Sept. 18, at 9:30 a.m. on Bannan Avenue between Court Theophelia and Court Louise Streets, closing out a stormwater overhaul that residents in the neighborhood have waited years to see finished. The Court Theophelia Flood Mitigation Project rebuilds the area's drainage system and adds the city's first piece of green stormwater infrastructure, a bioswale designed to soak up runoff before it ever reaches a pipe.

For a neighborhood that has dealt with standing water in the streets and saltwater damage to roads and underground pipes, that is not a small thing. The city says the new system is already reducing standing water during rain events.

What actually got fixed

The project rebuilt the neighborhood's stormwater system to handle more runoff and keep water off the roads. Crews also replaced aging water mains and sewer lines under the streets, work that does not show up in a photo but matters just as much to the pipes people depend on every day. A new sidewalk segment along Bannan Avenue now connects the neighborhood to nearby Fullerwood Park.

The centerpiece for Friday's event is the bioswale, a planted trench built to catch and filter street runoff using engineered soil and Florida-friendly plants before the water moves into the drainage system. Educational panels installed at the site explain how it works, so visitors don't have to take the city's word for it.

Chief Resilience Officer Jessica Beach said the improvements are already working as intended and thanked residents for their patience through construction. "This project is a great example of how thoughtful investment in resilient infrastructure can make a meaningful difference for our residents," Beach said, adding that the city could not have finished the work without the neighborhood's cooperation.

Who built it, who paid for it

The full project carries an estimated cost of roughly $4.86 million, according to city planning documents, and it was funded entirely through the state's Resilient Florida Grant Program, meaning it did not require a local tax increase or new city debt. Several firms will be recognized at the ceremony: Freese and Nichols handled engineering design, permitting and utility coordination; Castle Bay Design Studio designed the bioswale and streetscape; CDM Smith provided construction and engineering inspection; and DB Civil Construction built it.

To make room for the bioswale and the new sidewalk in a tight residential footprint, the St. Augustine City Commission approved an ordinance in 2025 converting Bannan Avenue to a one-way street.

Why the city calls it a pilot

City officials have described Court Theophelia as a test case. Before committing to bioswales elsewhere, the city plans to track how much upkeep the planting and filtration media actually require over time, and what that costs to maintain. If the numbers work, more flood-prone streets in St. Augustine could get the same treatment. The city has not set a timeline for that decision.

Court Theophelia was flagged years ago in the city's coastal vulnerability planning as a low-lying area exposed to both heavy rain and storm surge, the kind of place where saltwater lingers long after a storm and slowly eats away at roads and pipes underneath. That history is part of why this neighborhood went first.

The project also isn't happening in isolation. The city has other resilience work moving at the same time, including shoreline stabilization on the west side of the city and seawall work along the waterfront, part of a broader push to shore up flood defenses ahead of future hurricane seasons.

Friday's ceremony is open to anyone who wants to see the finished bioswale and ask questions about how it functions before the next big rain puts it to the test.

Want more on how St. Augustine is tackling flooding and resilience projects? Visit St. Augustine Community Website for ongoing coverage, browse more government and politics stories or check our news section for the latest updates. Got thoughts on the project or questions for the city? Join the conversation in our Community Forum.