U.S. DEPARTMENT OF THE INTERIOR HEADQUARTERS BUILDING MODERNIZATION (OPTION 3)


Shown left is DOI historic Grand Staircase. Grunley refinished the marble flooring, Tennessee Grey Marble walls, and bronze handrails. Shown right is the Make Up Air Unit (MAU-1) being craned over the completed Cafeteria Skylights below.

Grunley Construction received substantial completion on the Modernization of Wing 3, phase four of a six-phase project, and is nearing completion on the Cafeteria Tenant Fit-Out.

Current Status

The scope of Wing 3 included:

The new stairwells were installed from floors seven through one on the East side and three sets were built to serve the Cafeteria area, which are still under construction. The egressways include new stair installations with aluminum handrails, and an ADA ramp with granite pavers. Both are lined with granite curbs.

Grunley replaced the mechanical, electrical, and plumbing systems and renovated the elevators originally installed in the 1930’s. Each office now has its own fan coil unit. A new heat exchanger and pumps were installed to serve the chilled water system. A new fully integrated fire alarm system was installed. Machinery for the six car bank of traction elevators was refurbished and the existing cab finishes were restored. 

A new stone portal was installed in the main corridor outside the existing historic grand stair. This portal was installed with marble to match the existing Tennessee Grey marble stone. Other finishes included patching and repairing existing marble flooring, base, terrazzo, pigmented structural glass, quarry tile, plaster, and cork flooring. The existing crown molding was replicated with Glass Fiber Reinforced Gypsum and the main corridor soffits were painted to match the historically correct colors. New ceramic tile and refinished wood stall doors were installed in the existing restrooms.

Cafeteria Tenant Fit-out
Seven aluminum skylights and a make up air unit (MAU-1) have been installed atop curbs on the Cafeteria roof. Above ceiling MEP rough-in proceeded with minimal problems thanks to the previous coordination performed via Building Integration Modeling (BIM), which was modeled in the Revit 3D environment. All the Cafeteria air handlers, VAVs, and the main components of the Daylight Harvesting Control System (DHC) and Centralized Dimming and Switching System (CDS) have been installed. MEP rough-in (you mention MEP rough-in a few lines above…how is this different?) and insulation installation is nearly complete. Wall close-in, application of Ardex to the skylight concrete beams, terrazzo work, and light fixture installations are ongoing.  In order to install two new Cafeteria entryways, demolition is being performed under an existing 50' mural which is being protected during the process.

What’s Next?

Cafeteria -

The DOI modernization project is still on track to obtain LEED Silver Certification.

The next phase of the DOI modernization (Option 4 - Wing 2) will soon get underway with demolition, abatement, and coordination. Wing 2 existing MEP systems are being phased out.

Date Posted: April 8, 2010