The Rondout Bypass Tunnel Shafts – Shotcrete Lining

The Rondout-West Branch Tunnel (RWBT), a segment of the Delaware Aqueduct (the Aqueduct), was built from 1937 to 1944 and provides about 50% of New York City’s total water supply. The tunnel is concrete lined and has a finished inside diameter of 13.5 ft (4.1 m). It is about 45 mi (72 km) in length and runs in the southeasterly direction from the Rondout to the West Branch Reservoirs.

TAKING TUSCARORA INTO ANOTHER CENTURY

The Tuscarora Mountain Tunnels in Pennsylvania have a fascinating history. The older of the two tunnels, built between 1938 and 1940, was designed to carry a railroad that never came into service. Industrialists of the day, William Henry Vanderbilt and Andrew Carnegie, were backers of the scheme which was halted when they struck a deal with rival railroad owners.

EXCHANGE PLACE STATION – 9 CAR PROGRAM WEST CORRIDOR

Exchange Place Station 9-Car Program is a vital part of the $1 billion PATH system improvement plan unveiled in 2019. The improvements to the 111-yearold system will allow for longer 9-car trains on the Newark/ World Trade Center Line. The objective was to add capacity and reduce delays

SHOTCRETE AT MT PLEASANT STATION

Multi-million dollar underground stations are currently under construction on Metro and LRT lines in Toronto, Ontario, Canada. Traditionally, the thick, heavily reinforced structural concrete station walls have been constructed using the conventional form-and-pour concrete construction method. This construction method, while widely used, is not without its challenges.

Many of the underground station sites are in congested urban areas with limited spaces for laydown of concrete formwork, and crane access time for handling and installation of formwork is often on a critical path for completion of station construction.