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 provided engineering services and procurement support for a new $13M Light Rail Maintenance of Way (MOW) Facility to support a Design/Build procurement. The MOW Facility is a 27,000 square feet, two-story building that houses the MOW Track, Facilities and Power Departments.
Huitt-Zollars conducted the corridor/system analysis, site selection, environmental analysis (NEPA/SEPA), conceptual engineering, and Design/Build Procurement Bid Documents for a second Link Light Rail operation and maintenance satellite facility. Huitt-Zollars worked with operations and maintenance staff to program and design a facility that efficiently stores, operates, washes, dispatches, and maintains 96 light rail vehicles, approximately half of Sound Transit’s fleet.
Huitt-Zollars served as Design Manager and Lead Designer for a program to improve congested freeway access to the airport, and extend the LRT transit system to Sea-Tac International Airport. Services include project management, environmental assessment and WSDOT/FHWA clearance, agency coordination, and construction administration. Huitt-Zollars was also responsible for utility coordination and design, Intelligent Transportation System improvements, freeway structures, environmental mitigation compliance, SUE services, traffic analysis and simulation, and landscape design.
Sound Transit requested that Huitt-Zollars prepare a Non-Motorized Access Study of the area within 1/2 mile of the proposed South 200th Station area. The purpose of the study was to review existing pedestrian and bicycle routes, and propose improvements to current bike and pedestrian facilities to encourage non-motorized access. Huitt-Zollars performed site reconnaissance, identified issues, performed existing conditions inventory, and identified a non-motorized access network based upon the “Proposed S. 200th Street Station Area Capital Mitigation Options” map provided by the City.
Huitt-Zollars provided management and design services for all development phases of this 1,150 acre mixed use development. Huitt-Zollars prepared the master plan and backbone infrastructure system with the capability of adapting to changes in project requirements without reconstructing existing systems. Additional responsibilities included project management, EIS and SEPA preparation, engineering, design and implementation of the final design, land planning, permitting, construction of the master plan, landscape architecture, construction administration, survey, construction staking for r
Located in the South Sound area of Washington State, the two-million square foot T-600 Import Warehouse serves Target’s Regional Distribution Centers along the I-90 corridor from Washington State to the East Coast. On this design-build project, Huitt-Zollars provided site selection analysis, due diligence services, preliminary and final entitlement, permitting, topographic and construction survey, and site civil engineering for on-site and off-site infrastructure.
Huitt-Zollars provided engineering and landscape design services for this concrete-paver manufacturing facility. The facility has several buildings located on a 20-acre site. Fast-track design was provided for utilities to serve all the buildings and for drainage, erosion control, grading, and parking lot layout. The design was coordinated with neighboring projects, and onsite landscape design was provided.
Huitt-Zollars provided sewer system master planning for this 445-acre planned industrial park. Design and construction services associated with 8,000 linear feet of on-site sewer system improvements were provided for Phase 1 (125 acres) of the project. In addition, Huitt-Zollars managed and designed a 20-MGD sewage pump station and three 20-inch diameter HDPE, and 12,500 linear feet of sanitary sewer force mains that convey sewage from the pump station to an existing 48-inch gravity sewer. Force main design challenges included crossing two active railroad lines and two arterial roadways.
Huitt-Zollars provided design for the replacement of approximately 12,000 linear feet of sewer, 12,000 linear feet of new sewer main, and 15,000 linear feet of new side sewers for the sewer collection system in a 250-house neighborhood. The existing system ran through backyards and under houses, and had extensive maintenance and inflow and infiltration problems.