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Naples seeks prioritized plan for stormwater basins; estimates range into hundreds of millions
Summary
Consultants' Basin 4 and multi‑basin assessments identified large stormwater upgrades — pipes, pumps, seawalls and road raises — that could together cost hundreds of millions; staff asked council to approve a Kimley‑Horn task order to prioritize individual projects, and council signaled support to pursue phased work and grant funding.
Two recent engineering studies presented to the City Council on Jan. 13 identified extensive drainage upgrades needed across multiple low‑lying basins in Naples and a separate, more detailed plan for Basin 4 (Aqualane Shores area). The consultant analyses showed a range of potential improvements — pipe upsizing, new pump stations, upgraded outfalls, seawalls and road raising — and provided system‑level cost estimates that, if every identified improvement were built, would total in the mid‑hundreds of millions.
Kimley‑Horn's multi‑basin assessment examined five areas of chronic flooding and generated near‑term and long‑term improvement scenarios and engineering cost ranges across the set. AECOM's Basin 4 master plan supplied a deeper engineering look at Aqualane Shores and the surrounding neighborhood and explored scenarios that included gravity improvements and pump‑station combinations. Basin 4 estimates were in the tens of millions for the various scenarios; Kimley‑Horn produced a combined all‑basins total in the $529 million range for the most comprehensive package.
Staff asked council to approve a task order with Kimley‑Horn to break each basin's system‑level recommendations into discrete projects, perform more detailed feasibility work and rank projects by effectiveness, cost and grant eligibility. Councilmembers said they understand the scale of the engineering needs and expressed support for a phased, prioritized approach; members emphasized the need to pursue grant funding, state legislative priorities and other external funding sources. Council also directed staff to bring back a short‑term list of high‑priority improvements for Basin 4 for grant submittals and near‑term action.
No binding vote to fund construction was taken at the workshop. Staff said the requested task order and a project prioritization plan will return to council for approval; staff also noted that further decisions on funding mechanisms (grant pursuit, special stormwater millage or other instruments) will be required as the prioritization and design work proceed.
