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Aviation Easement Analysis – Off Airport Properties: Seattle-Tacoma International Airport (Highline School District Parcels 768620-0705 and 768620-1040)

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Port of Seattle
Noise Mitigation
Part 150

This draft report, prepared by Jacobs and ZLB for Seattle-Tacoma International Airport in March 2020, analyzes aviation easements for off-airport properties located near the airport's runways. It focuses on two Highline School District parcels (King County Parcels 768620-0705 and 768620-1040), documenting the removal of 26 trees that previously penetrated federally defined airspace protection surfaces, including approach, departure, and transitional surfaces. The analysis confirms that all identified obstacles have been removed as part of a construction package, and provides detailed elevation and coordinate data for parcel boundary points relative to runway thresholds.

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Notes

Draft avigation easement analysis prepared by Jacobs and ZLB for Sea-Tac Airport covering off-airport properties, focusing on Highline School District King County Parcels 768620-0705 (North Parcel) and 768620-1040 (South Parcel). Documents Part 77 surface obstacle analysis including Inner Approach (50-1), Inner Transitional (INTR), Threshold Siting Surface (TSS/34-1), Departure Surface (40-1), and Low Close-In (LCI) surface elevations in NAVD88 MSL. Identifies 26 trees (all removed under JOC-Package1-SD5) on both parcels near runways 16R, 16C, 16L, 34C, 34L, 34R, with LIDAR survey data from June 2018. Also references residential and commercial off-airport parcels including Singh (172304-9150), Johnston (024150-0010), Hernandez (024150-0020), Chen (024150-0070), Reda/Tessaye (024600-0044), Des Moines/Amos/Sagali (052204-9134), Chu (322304-9022, 322304-9293, 322304-9117), Farmer (768620-0690), Hill Grove Cemetery (042204-9025).

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