Geotechnical drilling was set to begin yesterday on the 710 Tunnel Technical Study in the L.A. area. Currently the 710 freeway ends along the city of Los Angeles-Alhambra boundary but was intended to run north to a junction with the 210 and 134 in Pasadena. The tunnel technical study will assess the feasibility of building a tunnel to complete the segment. Caltrans and CH2M HILL will be performing the borings which will go up to 250-ft deep. Seismic lines will be performed as a part of the study as well. Source: LA Times.
The Port Authority of Allegheny County (Pittsburgh, Pennsylvania) has a major transit improvement project dubbed the North Shore Connector. Its main components are twin bored tunnels 1.2 miles long that will connect the Port Authorityâ€™s Light Rail Transit system, the T, 1.2 miles from the Gateway Subway Station underneath Stanwix Street and the Allegheny River to the North Shore. It will travel under the river and provide three new stations and allow for future improvements beneficial to future development and continued downtown revitalization. The $435 million project is making news recently for cost increases, drawing comparisons to Bostonâ€™s Big Dig much to the dismay of the Port Authority. Read on for project maps, links and more info.
The Riverbank Filtration Tunnel and Pump Station in Louisville, Kentucky is an innovative project to provide clean drinking water to the Louisville metro area. The project involves using the natural filtration of a sand and […]
The century-old PATH subway tunnels underneath the Hudson River were not excavated through bedrock, but rather under a thick layer of silt and clay. Apparently there is a a sufficient security concern to warrant protecting […]