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Arcata staff present sea-level rise options for wastewater plant; levee protection and full relocation cost very different
Summary
City engineers and consultants presented a long-range feasibility study that ranks levee-augmentation (protect) and full relocation (retreat) as leading options for Arcata’s wastewater treatment facility, with estimated capital costs ranging from roughly $30 million (levee approach) to about $200 million for relocation.
Arcata city engineer Netra Khatri and GHD technical director Rebecca Crow told the City Council on Jan. 21 that the city’s wastewater treatment facility long-range feasibility study evaluates how to keep the plant safe, compliant and operable as sea levels rise.
“This project was to evaluate strategies to protect, relocate or otherwise adapt the city’s wastewater facilities to maintain safety, regulatory compliance and prepare for future sea level rise,” Rebecca Crow said during the presentation, which staff said was funded by a State Water Resources Control Board grant administered through the Rural Community Assistance Corporation.
The study analyzes coastal-hazard risks at the existing facility, develops top-ranked alternatives, and provides cost and funding information to…
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