Seattle, Washington United States
This project involves the construction of a 2.1 million square foot rental car facility adjacent to the Seattle-Tacoma Airport. Scheduled to open in 2012, the facility will house the airport's rental car operations, which will open up 3,200 parking spaces in the airport's main garage. Overall, the project includes off-site roadway improvements, a bus maintenance facility, a refueling station, enhancements at the main terminal for buses and a purchase of a 29-vehicle busing fleet.
Triple Bottom Line
Economic: The project was designed and constructed under the "total cost of ownership" framework as part of the Port Commission's newly minted Sustainable Asset Management policy. This resulted in more efficient building systems and strategies for the life of the building. The first, cheapest cost was not the sole factor of the decision making framework for both the Port of Seattle (project owner) and the rental car industry (tenants). The rental car companies worked with the Port during the design and have continued their efforts in the construction phases. The companies also shared an interest in designing a cost-effective, efficient, and low-maintenance facility.
Environmental: The specifications included options for using recycled, regional, and Forest Stewardship Council (FSC) materials in construction and providing resource conservation (power, water, etc.). During construction, designated bins were easily accessible by all active trades for site separation of construction debris. This resulted in an average construction waste recycling rate of 95% or higher during all phases of construction. Strict NPDES and stormwater requirements were followed throughout the construction. Long term strategies such as the use of bio-swales, on-site detention and treatment of stormwater, native landscaping materials and low-flow water strategies were employed.
Social: The Port of Seattle required a computational fluid dynamic and wind tunnel model analysis be conducted to evaluate the levels of CO on operational floorplates where employees are expected to work throughout the 24/7 operating hours. The CFD and wind tunnel analysis determined there were several 'dead' air zones on the floorplates that could benefit from a sensor-activated fan system to move the stagnate air and CO fumes away from the workers. Sensors are designed to activate fans on until CO levels are back to 'average' or 'normal. It is expected the fans will only run during peak days and certain instances of weather (e.g. low barometric pressure leading to low air movement, etc). Original base building design was to have air shafts and fans throughout each operational floorplate (levels 1-4) running 24/7. New design only has shafts and fans at areas where CFD analysis showed 'dead zones.' The Port of Seattle provided bike racks, showers, meditation rooms, and designated employee break rooms throughout the facility.
Anne Timmermans, LEED AP, BD+C, CMIT, Project Manager
Port of Seattle