Creative solutions will likely be required to bridge the gap between the cost of addressing growing infrastructure needs in the U.S., currently estimated at $4 trillion, and the amount of available public funding. One increasingly popular possibility involves supplementing public funds with private financing through agreements that allow for greater private sector participation in the … Continue Reading
Those that “dig in the dirt” are very familiar with the Damage Information Reporting Tool (DIRT), which was launched in 2003 by the Common Ground Alliance (CGA). Over the years California has enacted several statutes requiring anyone moving dirt to notify a regional notification center of the area of planned disturbance that may impact a subsurface … Continue Reading
The City of Seattle is replacing the two-level highway viaduct that dominates the downtown shoreline with a two-level tunnel. A very large tunnel boring machine, named Bertha in honor of an early Seattle mayor, has been excavating the tunnel for several months. In December, Bertha encountered an unknown obstruction and came to a halt. Seattleites … Continue Reading
I previously told you about some upcoming Seattle tunneling projects. Here now is a link to artist renderings of the new SR 520 floating bridge project, which will raise the existing bridge up above the pontoons, making space for maintenance works and storm water treatment and fire suppression utilities underneath: www.flickr.com/photos/wsdot/6871707294/in/set-72157629307832804/ The photo site has links … Continue Reading
On January 6, 2011, the Washington State Department of Transportation (WSDOT) signed a contract with Seattle Tunnel Partners for the biggest piece of the SR 99 Viaduct replacement project, the 1.7 mile long tunnel carrying traffic from the south end of the Seattle waterfront to near the Seattle Center. This is a design-build contract with … Continue Reading
