Description

Thomas/Wright, Inc., serving as the prime consultant, completed the conceptual level design and site selection process for a transfer/recycling station to replace the Vashon Island Landfill which closed in 1999. Project work included preparing several design concepts, evaluating five potential sites, working closely with the King County Solid Waste Division Work Team to establish operating criteria for the facility, and providing technical support to the Division at public meetings and Citizen Advisory Committee meetings. In response to neighborhood concerns, an evaluation of noise impacts on adjacent properties was completed. A SEPA checklist was prepared which included a traffic study and a noise study. T/WI prepared the building permits and received approval for the Special Use Permit.

Thomas/Wright, Inc. completed the plans and specifications for the transfer/recycling station. The station is a shallow pit facility with a preload compaction unit. Recyclables are baled and the recycling drop-off area has been designed to be handicap accessible. On-site improvements included access roads, water storage tanks and pumps for fire flow protection, an on-site wastewater disposal system, stormwater facilities, a new fueling station, a standby generator, and landscaping. The facility also includes a new scalehouse and scales. The stormwater facilities include a two cell detention pond, a three cell wet pond for water quality, a drainage swale, outlet control structures, storm drain pipe, catch basins, and an oil-water separator. Public art is integrated into the facility. A Drainage Report was prepared to address the requirements of the King County Surface Water Design Manual.

T/WI provided contract administration during construction.