GEI Consultants, a geotechnical, environmental, water resources, and ecological science and engineering firm, announces work on three new projects under the leadership of its Washington, D.C. office:
Washington Marriott Marquis Hotel, Washington D.C.

Hensel Phelps Construction Co. and D.C. Slurry Partners

GEI provided environmental, geotechnical, and construction services for the new $520 million, 105,000-square-foot Washington Marriott Marquis Hotel in Washington, D.C., set to be completed in May 2014. Services provided included environmental site investigation, soil pre-characterization, value engineering of the foundation system, design of deep drilled shafts for the top down construction scheme, and field oversight during foundation construction. For this project, seven below-grade stories were constructed that required the installation of drilled shaft foundations and interior building columns at depths of more than 100 feet below ground. A top-down construction technique was used, a method that builds the permanent structure members of the basement along with the excavation from the top to the bottom. The four-star Washington Marriott Marquis Hotel was designed to earn LEED Silver certification and will be one of the largest hotels in the country to earn this achievement. GEI designed the foundation system to help accelerate the construction schedule while saving costs and fulfilling project requirements.
Washington D.C. Water Clean Rivers Project, Blue Plains Tunnel, Washington D.C.

GEI is providing geotechnical consultation and field services to the consultant construction management team (CCM) for the $330 million Blue Plains Tunnel design-build project in Washington, D.C. The CCM team is managed by EPC consultants and consists of site-specific engineering consultants. D.C. Water is in the process of constructing a 24,000-foot-long soft ground tunnel, the first and largest in a network of tunnels that will capture and convey the combined sewer overflow (CSO) that currently impacts the health of the rivers in Washington, D.C. GEI’s services include geotechnical consultation, instrumentation submittal and design reviews, a variety of construction oversight services, and geotechnical data management services. When the tunneling work begins at the end of this year, GEI will provide oversight of the instrumentation system, which will measure ground movement along the tunnel alignment and at four major shaft sites during construction. The firm also contributed design review and field inspection services during the construction of slurry walls, which ensure that construction upholds the design tolerance for the excavation support.
Wolf Creek Dam Gallery and Plaza Grouting Project, Russell County, KY
GEI has completed work as the technical lead and quality control representative for the Judy Company (TJC) on the $10 million Wolf Creek Dam Gallery and Plaza Grouting rehabilitation project. The Wolf Creek Dam project is the most critical structure in the U.S. Army Corps of Engineers’ national inventory of dams. The project involved installing grout curtains in the gallery and plaza areas of the dam. During the project, GEI also focused on safeguarding the local ecosystem, including the quality of the water feeding into the nearby Wolf Creek Fish Hatchery.
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