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Highline Public Schools
15675 Ambaum Blvd. SW Burien,WA 98166

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Crews Install 2,300 Deep Piers at HHS

Project Update | Highline High School

Highline High School site after demolition, with drill, tall pine trees and stadium visible.

Workers are drilling 25 feet in the earth 2,300 times to install deep aggregate piers for the new Highline High School. The foundation piers are made of compacted gravel.

Demolition wrapped up at the beginning of November 2019. Now Skanska construction crews are doing rough grading to smooth or flatten the site prior to construction, installing underground utilities and placing footing framework, steel and concrete. 

Workers have begun structural excavation on the north and east sides of the site.

UPDATE:  Steelworkers used a tall crane to erect the first structural steel columns and beams in the southeast corner of the building footprint on November 20. See photos added below.

Plans to place HHS tennis courts at the Sunnydale site have been submitted to the City of Burien for review along with plans for right-of-way improvements.

Work is tracking ahead of schedule. We continue to expect the new school, designed by Bassetti Architects, to open September 2021.

More photos of progress are available:


November 24, 2019 - Steel Columns & Beams Are Up in SE Corner of Building Pad


November 20, 2019 - First Steel Column Raised

First steel column erected in SE corner of new HHS building footprint.

November 14, 2019 - Drill Installing 25-Feet-Deep Foundation Piers

View of HHS project site after demolition, with workers using a drill to install piers.

November 14, 2019 - Building Pad in SE Corner Behind Performing Arts Center (l.)

Southeast corner of HHS project showing concrete and rebar installation in progress.