Hillis-Carnes provided complete DCRA third party testing and inspection services during the construction of the new 20-story Marriott Marquis Hotel, which includes 1,175 rooms and 46 suites. The project site covers approximately 2.2 acres and is located at Square 370, which is the northwest corner of 9th Street NW and Massachusetts Avenue NW in Washington, DC. The project was one of the first Top-Down Construction Projects in the area with the installation of nine levels below-grade and a facility tunnel connecting the Hotel to the adjacent Convention Center. The Hotel includes more than 100,000 SF of meeting and assembly space, a grand lobby, and five separate retail and restaurant outlets on the ground floor. Meeting space includes a 30,000 SF grand ballroom, two 10,800 SF junior ballrooms, more than 53,000 SF of meeting rooms, an 18,800 SF indoor event terrace, and a 5,200 SF rooftop terrace.

The scope of work included DCRA Special Inspections services of soils, slurry wall construction, foundations, asphalt, concrete, masonry, steel, fireproofing, and the Management of TPI Code Inspections for mechanical, electrical, plumbing, and fire and life safety inspections.