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Commission adopts 2025 Engineering Design & Construction Manual updates; new standards clarify underground stormwater and bike guidance
Summary
The City Commission adopted a revised Engineering Design & Construction Manual that incorporates recent design memos, clarifies materials for underground stormwater systems under buildings, updates curb‑ramp/detectable‑warning rules and retains city guidance on bicycle facilities after advisory discussion.
The City Commission unanimously adopted an updated Engineering Design & Construction Manual (EDCM) on Oct. 22, formalizing a package of technical changes and the process the city will use to roll out future edits.
What changed: The EDCM update consolidates previously issued design memos and introduces a formal design‑memo process for future technical changes. Key practical updates include: - materials and durability standards for underground stormwater systems sited in the zone of influence of buildings (manufacturers and structural engineers must demonstrate 100‑year service life to be used under building footprints; some products remain unacceptable for under‑building use), - acceptance of high‑quality polypropylene and reinforced…
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