Description
Updating wastewater infrastructure to be resilient to the impacts of climate change is critical to protecting public health and water quality in Puget Sound, benefiting those who live, work, and play in the region. King County will integrate measures to avoid or minimize climate change impacts into the design and construction of up to two large wastewater infrastructure projects. Project teams for large wastewater projects will identify climate vulnerabilities and adapt projects to account for climate change based on the facilities’ useful life, combined sewer overflow facility sizing guidance, engineering best practices, and other best available science. Design considerations include changes in precipitation, sea level rise and its associated groundwater impacts, and/or the need to adapt infrastructure over time. Large projects that may be included within the scope of this action include the Elliott West Wet Weather Treatment Station Upgrade, the Mouth of the Duwamish Wet Weather Facilities, and the Chelan Wet Weather Storage Tank.