City public‑works staff presented an interlocal agreement with the county and consultant HAF (presented as "Half" in the briefing) to produce a joint drainage master plan at the council workshop on Nov. 25.

Public‑works staff (Mister Tucker) said the study is an unprecedented cooperative effort between the city and county to account for the interconnected nature of local floodplains. Consultant Bryce Carlisle summarized the project’s six task areas: project management and coordination with city and county staff; public outreach and stakeholder meetings; data collection (land use, LIDAR, record drawings); an existing‑conditions analysis using rapid 2D rainfall/runoff models; identifying approximately 30 primary flood‑risk areas; and developing potential mitigation solutions and a CIP with cost estimates and benefit‑cost ratios.

Carlisle said staff will narrow the 30 identified areas to 20 mitigation candidates (12 county, 8 city) and that deliverables will include a technical drainage analysis report, a CIP package, the master‑plan report and an updated drainage criteria manual. Staff estimated the program would take about two years, aiming to start in January and wrap up in January 2028.

Why it matters: the study is intended to produce prioritized, fundable projects to reduce localized flooding impacts across jurisdictional boundaries and update the city’s drainage design criteria.

Next steps: staff invited council to participate in coordination; consultant work will begin once the interlocal agreement and contract are finalized.