Specialty Geotechnical Contractor DBM was excavating a drilled shaft for the I-5 interchange in Ridgefield, Washington when they dug up something unusual at a depth of 30-ft. At first the WSDOT inspector thought it looked like wood, but then called in a WSDOT archaeologist who took the fragments to University of Washington’s Burke Museum of Natural History and Culture. The tusk is believed to belong to a Columbian Mammoth and date to approximately 13,000 to 15,000 years ago. Story and image from The Columbian.
PITTSBURGH, PA – January 18, 2010 – Nicholson was recently awarded a subcontract by E.E. Cruz and Tully Construction Co., a Joint Venture that includes approximately 200,000 SF of diaphragm walls for the construction of the 96th Street station box as part of New York City’s Second Avenue Subway project. Nicholson’s contract also includes jet grouting for a subgrade strut, water cutoff, and temporary support of excavation; compensation grouting for two buildings at excavations for ancillary structures; micropiles within an existing building; and curtain grouting in rock. The project owner is the Metropolitan Transit Authority. [Editor] Click through for the entire press release from GeoPrac.net sponsor Nicholson Construction. [/Editor] […]
Geovert, a specialty design-build geotechnical contractor in New Zealand and Australia has released a video showing the construction of a challenging rockfall protection project. From their YouTube description:
Stockton Coal Mine is situated on the rugged west coast of New Zealand’s South Island, near Westport. Geovert, a design-build contractor specializing in difficult access rockfall mitigation projects, were retained to provide a turnkey solution combining slope protection and stabilisation measures, to manage the rockfall hazard and protect the surrounding environment with a world class design build rockfall protection solution. The barrier was 1.7 kilometres long and follows a ridgeline escarpment, making this the longest rockfall protection barrier in the southern hemisphere. This was one of the largest and most challenging rockfall construction projects completed to date anywhere in the world.
Click through to see the video.