Notes
Analysis citing the WSDOT SR 509 Phase 1 Environmental Re-evaluation (May 2019) comparing 2003 FEIS forecasts of 7,900 vph against re-evaluation forecasts of 4,700 vph on the SR 509 extension between I-5 and 24th Avenue S/28th Avenue S interchange, with tolling assumed. Documents that the 2045 Build condition adds 500–1,400 vph on existing SR 509 north of S 188th Street (row 11 showing 3,700 AM and 4,670 PM peak hour volumes on the SR 509 Extension west of I-5), with cargo truck traffic projected toward the Duwamish area. Raises concerns that WSDOT conducted no site-specific airshed analysis for Burien, that no thorough noise analysis has been done since 1996, that EPA-modeled 2017 emissions are nearly three times higher than 1996 third runway evaluation estimates, that FAA identified significant new noise in the 2018 CATEX for the new flight path, and that neither WSDOT nor FAA performed a cumulative impact analysis for environmental justice communities under NEPA. References the Ninth Circuit Court decision of November 27, 2019 and DEOHS health maps showing severely degraded conditions in the affected population center.