Seattle

Huitt-Zollars provided services on three separate electric charging projects: 

6 dual EV NRV’s and Employees’ Personal Vehicles: Employee parking lot expansion/re-striping of the existing lot, included 6 dual EV chargers. Work also included concrete paving, lighting, drainage (collection, conveyance, treatment, disposal), security landscape, ADA improvements. As the prime consultant, our services included PS&E, bid documents, permitting, SEPA/NEPA, design survey, and bidding.

As part of the Sea-Tac International Airport reconstruction, the Huitt-Zollars team designed the pedestrian bridge and pedestrian walkway that connects Sound Transit’s SeaTac/Airport Station to the Terminal at Sea-Tac International Airport. After foundations and columns were constructed, the pedestrian bridge was assembled on site and lifted into place. This method was selected due to limited access and very short nighttime roadway closure constraint. After placement, the pathway to the terminal was completed.

Huitt-Zollars designed the Lacey Gateway-Phase II sanitary sewer regional lift station and reclaimed water storage/distribution systems for the 250-acre public and private mixed-use development. The regional lift station includes at least three wet wells with submersible pumps, a control building, an emergency generator and a force main over one mile in length.

Huitt-Zollars provided design for a 1.3-million-gallon prestressed water storage tank with booster pump station as a joint project of the Skyway Water and Sewer District and King County Water District #125. The tank and associated distribution system provides both districts with improved potable water and fire protection storage capacity.

Sound Transit’s South Link extension expands the agency’s light rail system 1.6 miles, to South 200th Street. Huitt-Zollars served as the prime consultant and developed preliminary engineering plans for the guideway, systems, station, and related capital improvements. The project utilized the Design/Build contracting approach which was Sound Transit’s first initiative with this contracting method.

Huitt-Zollars provided master plan, civil/infrastructure engineering, and landscape architecture services for the Soos Creek Trail. The project provided a phased, 500-acre, regional park and trail system. Soos Creek Park encompasses a six-mile section of Big Soos Creek with associated wetlands and valley slopes. The Soos Creek corridor is considered one of the region's most sensitive natural areas. Therefore, all development was carefully analyzed and planned in order to minimize impacts to the stream and wetland environments.

Huitt-Zollars completed drainage and landscape designs to widen four miles of interstate freeway in a congested urban area, through this $124 million design-build project. The drainage system included five wetland facilities along with water quality media filtration embankments and a water quality monitoring basin. Improvements included stormwater drainage and control structures, rehabilitation of culverts and pipes, water quality monitoring facilities, slope drainage behind retaining walls, and a new 2.5-acre off-site wetland mitigation site. Roadway restoration plans were prepared.