TagSea-Tac Airport(1855)

This technical report, prepared by Parametrix for the Port of Seattle in February 2024, documents the wetlands and streams found within and around Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan (SAMP) Near Term Projects. It covers the delineation of aquatic critical areas, assessments of potential project impacts on wetlands and waterways, proposed mitigation measures, and the permitting approach needed to address those impacts. The report also includes analysis of impervious surface changes and Federal Flood Risk Management Standard (FFRMS) compliance worksheets.

This technical report, prepared by Parametrix for the Port of Seattle in February 2024, documents the wetlands and streams found at Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan (SAMP) Near Term Projects. It covers the delineation of wetland and stream boundaries, assessments of potential impacts to these aquatic areas from planned airport projects, and proposed mitigation measures and permitting strategies to address those impacts.

This technical report, prepared by Parametrix for the Port of Seattle in February 2024, documents the wetlands and streams found at Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan (SAMP) Near Term Projects. It covers the delineation of wetland and stream boundaries, assesses potential impacts to these aquatic areas from planned airport improvements, and outlines mitigation measures and permitting approaches to address those impacts.

This February 2024 technical report from the Port of Seattle documents the wetlands and streams located at and around Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan (SAMP). It includes mapped locations of wetlands surveyed across multiple years (2006, 2014, and 2017) along with stream corridors such as Miller Creek, Des Moines Creek, and Walker Creek. Field hydrology monitoring data from 2020 is also provided, recording groundwater depth and soil saturation measurements to assess wetland conditions across the airport property.

Washington State Senate Bill 5955 creates a 'port district equity fund' to help large port districts, such as the Port of Seattle operating Sea-Tac International Airport, pay for aircraft noise mitigation programs in nearby communities. The bill provides an initial one-time appropriation for FY 2025, followed by ongoing funding of up to $10 million per year drawn from sales and use taxes on capital construction projects within the district. It also requires port districts to apply for fund resources to repair or replace noise mitigation equipment that is no longer working or has caused structural damage to properties, with port districts required to match at least half of the Legislature's contribution.