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leed | Census Bureau Office Complex / Suitland Federal Center - LEED Silver Certification
Census Bureau Office Complex / Suitland Federal Center - LEED Silver Certification
The project includes 1.5 million square feet of office space, two parking structures containing over 3,000 spaces, a remote delivery facility for mail and receiving, covered walkway to metro station, an entry garden and landscaped courtyards. The new headquarters features a curvilinear main structure clad with a curtain of ipe wood vertical fins of irregular curved profiles assembled into random patterns to simulate patterns of trees.
AMT is providing topographic surveys and underground utility locating, site engineering design, site construction documents, forest conservation planning, stream stabilization and restoration, site and environmental permitting, construction stakeout, and construction administration.
GSA selected a design-build with bridging documents delivery system, a variation of the traditional design build process. AMT prepared construction documents based on concept plans prepared by GSA's design team. To meet a very short delivery schedule and to start construction as early as possible, the Skanska team developed a phased design approach. AMT prepared an early site reparation and temporary parking construction documents package within a few weeks of receiving notice to proceed. AMT then prepared rough grading, utility relocation and sediment control plans and secured MDE permits that allowed the Contractor to proceed with preparing the building pads and start foundation work. These were followed up with construction documents for the first phase consisting of 771,000 square feet of office space and a parking structure with 1592 spaces. Phase 2 includes the balance of the new headquarters building complex and parking structures, and phases 3 and 4 will include the demolition of the existing building, relocation of Swan Road and landscaping of the old building site.
Unforeseen by the original concept design team, a highly eroded drainage channel and a small wetland area that are regulated by U.S. Army Corps of Engineers was discovered within the project. With the potential to delay the project at least six months until permits could be secured, AMT worked closely with the design-build team and GSA to develop alternatives, met with the regulatory agencies, and revised the construction documents to permit the construction to proceed while the permits were being secured. Stabilization and restoration of the eroded channel, revisions to the foundation design and a shift of building elements were incorporated into the construction plans to minimize impacts, and AMT revised the civil documents to allow the construction to proceed outside of the regulated areas.
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