Stantec briefs commission on vulnerability assessment, urges focus-area adaptations and grant pursuit
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Summary
Stantec presented a draft vulnerability assessment under the Resilient Florida grant, identified hotspots of flood-vulnerable city assets, and recommended conceptual adaptation projects and adding flagged assets to Miami-Dade's mitigation strategy to pursue hazard mitigation funding.
Diane Quigley of Stantec presented the draft vulnerability assessment and adaptation plan prepared for the City of Opelika under the state-funded Resilient Florida program. The study mapped present-day and future flood scenarios (planning horizons: present, 2050, 2080) using elevation data, climate projections and a GIS mapping approach to identify flood depths and vulnerable city-owned assets.
Quigley told commissioners the team identified focus areas or 'hotspots' where concentrations of critical assets—pump stations, water and sewer infrastructure, certain roadways and historical resources—are most exposed. "Anything that is vulnerable to flooding under those horizons is eligible for future funding under the Resilient Florida program for adaptation," she said. Stantec ran sensitivity analyses and a steering-committee ranking process to produce a top-10 list of priority assets for conceptual adaptation strategies.
Adaptation options presented were conceptual: elevating facilities, stormwater system improvements, relocation or site-specific drainage upgrades. Quigley said the project has produced one-page project summaries ('cut sheets') to support future grant applications and that the grant ends March 31; staff will address final comments to complete the report.
Quigley also discussed how the study could help the city seek reductions under FEMA's National Flood Insurance Program Community Rating System (CRS) if the city opts to pursue additional flood-management activities. She cautioned CRS participation is voluntary and can carry implementation costs for the city, but it can deliver flood-insurance premium reductions for residents.
Commissioners asked how the assessment might affect residents' flood insurance and whether projects already in the city's CIP were duplicated; Quigley said staff compared the CIP with the vulnerability list and excluded assets already funded and in design from the grant-focused list. The study team recommended adding certain projects to the Miami-Dade local mitigation strategy so they would become eligible for federal hazard-mitigation funding.