Climate Change Vulnerability Assessment and Resilience Plan

Carollo performed a climate vulnerability assessment to evaluate how projected sea level rise, coastal erosion, tsunamis, storm surge (related to hurricanes), and 100-year flood events could impact the Sand Island Sewer Basin and Wastewater Treatment Plant through the year 2100.

Carollo worked with the City and County to identifiy the extent and inundation level due to present day and projected flooding threats to critical facilities. Nearly all pump stations and most facilities within the WWTP would experience severe inundation under the future “worst-case” scenario of a 100-year flood event or the modeled Category 4 hurricane storm surge occurring after sea levels have risen six feet.

The resulting resilience plan defines near and long-term adaptation strategies to reduce vulnerability, increase resilience, and maintain reliable wastewater treatment and conveyance service.