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City to bid $2.8 million drainage upgrades for Highland and Plantation neighborhoods
Summary
Engineering presentation identified roughly 2,000 linear feet of pipe to be upsized, new catch basins and box improvements to reduce surface flood elevation by about one foot; mayor said $440,000 in state funds is available now and the larger $4.1 million priority request is seeking next year's capital outlay.
Chandler Staples briefed the City Council on planned drainage improvements for two neighborhoods that have experienced repetitive flooding. The engineering study identified priority pipe relays and upsizing—about 2,000 linear feet of piping identified for replacement with arch-style pipe and 2–3 additional basins in some locations—to lower the hydraulic grade line and improve flow toward a downstream box culvert the presenter described as adequate.
Staples said the Highland phase will raise system capacity toward a 25-year storm standard and lower water levels in the storm system by approximately one foot in affected streets. For Plantation Drive he described targeted fixes: relaying a 400-foot section that was adversely sloped, installing slotted manhole/catch-basin tops and creating an easement and new piping behind a daycare to intercept water from Rue De Leon before it crosses private yards on Plantation.
The mayor told the council the two projects (Highland and Plantation) are being budgeted together at $2,800,000 and are expected to be advertised for bid in December. He added the city has $440,000 in state capital outlay funds that can pay for immediate engineering and that the projects are prioritized for a possible $4,100,000 capital allocation next year, for which the city says it has roughly a $1.2–1.4 million local match budgeted.
Council members asked technical questions about tie-ins, culvert sizes (two 60-inch culverts were discussed), FEMA flood zones and the possibility of a future map amendment; Staples said a map amendment is unlikely after only the first phase of work but could be studied if downstream improvements continue. The council directed staff to coordinate drainage work with planned street repairs to limit rework and to move forward with bidding for both phases.
Next steps: final bid documents are to be completed and Highland and Plantation will be advertised together in December; engineering for a second phase will continue concurrently.
