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 – Nicholson Construction recently completed emergency repair work to an unstable pier supporting a bridge on INDOT’s Interstate 65. These repairs enabled a 37-mile section of the highway’s northbound lanes to be reopened after a four-week closure.
The highway was in the process of being rehabilitated and widened when the pier was damaged by steel piles driven into the water tight ground below it. The pier began to settle and eventually rotated ten inches.
Nicholson developed a design-build solution that used micropiles to transfer the loads to more stable soils and low-mobility grouting to fill voids and densify the upper subsurface layer.
[Editor] Read on to hear more about Nicholson’s fix of this unstable bridge pier. [/Editor]
UK-based geotechnical mega-company, Keller, has recently acquired US-based geotechnical contractor Moretrench for $90M. Moretrench works primarily on the east coast and in addition to all manner of geotechnical construction expertise, they also have specialty expertise […]