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Commission seeks engineer review as drainage plan moves toward injection wells
Summary
Commissioners questioned whether pervious concrete or deep injection wells are the right solution after roughly $800,000 in central-island drainage work; staff said injection wells are in design and permitting and that firm cost estimates are not yet available, and commissioners requested engineer briefings before further spending.
Commissioner Joseph asked staff to pause and re-evaluate current central-island drainage proposals after learning about prior expenditures and to compare pervious-concrete approaches with the injection-well option being advanced.
Staff explained that injection wells operate well below the saturation level of the near-surface aquifer and are part of a multi-agency permitting and review process; the design remains under review by the city’s engineers as well as Miami-Dade and state permitting agencies. Staff said design work and permitting are ongoing and that the city does not yet have firm construction or lifecycle cost estimates.
Commissioner Joseph voiced concern about unintended consequences, asking, "We're going to be pumping polluted water into our aquifer. Is that what I just heard?" Staff and the city engineer described safeguards in design and testing phases but acknowledged the need for more technical briefings for commissioners.
Next steps: commissioners asked for one-on-one sessions with the city engineer and for staff to provide a detailed timeline, permitting status and estimated costs before any further expenditure.
