RFP Level design of approximately 11 km (6.8 miles) advanced light rapid transit (ALRT) line that connects Coquitlam to Vancouver via Port Moody and Burnaby. It consists of elevated and at-grade guideway with 6 new stations and an approximately 2-kilometer-long (1.2 miles) bored tunnel 6 m (20 ft) excavation diameter.View More
The Project consisted of 8.5 miles of tunnels (13.6 km) and 16 new stations including 86th Street Station.View More
The Project consisted of 10,000 ft of tunnels (3 km) and 3 new stations, 34th street station and auxiliary structures including Vent Plant Site "L"View More
The project involved the demolition of a 10-story building, excavation of a third basement level into rock, and construction of a 24-story building with the edge of the building directly above the edge of the WMATA station.View More
Clearance in the tunnels was increased from about 19’-4” to 20’-6” to facilitate double stack containers on the route. The 4,175 ft (1272m) Bergen Hill Tunnel is primarily a mined rock tunnel constructed circa 1860. Approximately 20 percent of this horseshoe shaped tunnel was lined with brick and concrete.
The reconstruction of the South Ferry Terminal resulted in the relocation of the station platform and mezzanine to a new location underneath Peter Minuit Plaza and State Street in Lower Manhattan, adjacent to Battery Park and the Staten Island Ferry Terminal. The project entailed constructing a new subway station within a tunnel extending beneath three active existing NYCT subway tunnels which require underpinning and rail/invert replacement.View More
Environmental Impact Statement report was prepared, comprising of the engineering and environmental feasibility study of constructing a rail freight tunnel across the New York Harbor to connect Staten Island, NY or Jersey City, NJ to Brooklyn, NY. TBM and sunken tube options were considered.View More
The project involved the rail connection from Long Island through existing 63rd Street tunnel build in 1970-ties beneath the East River (sunken tube). Train will travel in the new tunnel between Second Avenue and under Park Avenue, beneath existing Metro-North Railroad tracks terminating at new LIRR station under the lower level of Grand Central Station. The underground works were in hard rock in the west and soft ground in the east.View More
The program comprised addition of tracks, service and personnel facilities and modification to existing facilities located on the former sanitary landfill. The Greenwood Yard Carhouse is an essential subway maintenance facility, which operates 24 hours per day
The overall program consisted of a number of fixed facilities, including stations, tunnels, cut and cover running structures, yards and shops constructed in the glacial deposits. There were four extensions planned with a total length of 18.7 km (11.6 miles): Eglinton West, Sheppard Subway, Spadina York University Extension and Scarborough RT Extension. Only Sheppard Subway was constructed at that time using Lovat EPB TBM - Earth Pressure Balance - Tunnel Boring Machine, followed immediately by lining with precast concrete tunnel liners.
Design, construction and commissioning of 9.5 km, 3.7 m ID, TBM mined tunnel and 23 shafts. Most of the shafts are offline therefore requiring the construction of 18 adits up to 4 m (13 ft) long and application of sequential excavation tunneling methods (SEM/NATM). The tunnel is supported by unbolted/doweled steel fiber reinforced concrete segmental lining.
About 50,000 feet (15.2km) of 27 (8.2m) to 30 ft (9.1m) diameter storage and conveyance tunnels were bored at depths up to 150 (45m) to 300 feet (90m) below ground surface in hard rock. Four shafts 40 ft (12m) in diameter, one overflow shaft, three open cut intake structures (vortex shafts) and pump station were also constructed.View More
The extension of a 72-inch (1.8m) transmission main from South Bound Brook to Middlesex Borough was installed in a 1,200-foot (365m) 8.5-foot (2.5m) diameter tunnel was constructed using Lovat TBM with the drive occurring in water bearing contaminated ground to carry the transmission main and will cross beneath the D&R Canal, the D&R State Park and the Raritan River. Two shafts 34-foot (10.4m) and 16-foot (4.9m) were constructed using mechanical methods and blasting to facilitate access to the tunnel.View More
The project involved the raw water to be withdrawn from the existing 12.25-foot (3.7m) diameter pressurized section of the New Croton Aqueduct by a new tunnel containing a minimum conduit size of 12 feet (3.6m) in diameter. On the discharge side, two new conduits were planned to transmit low level (9-foot/2.7m diameter) and high level (8-foot/2.4m diameter pumped) finished water to low level and high-level distribution.View More
The project involved the design of the precast tunnel liner 12.5 m (41 ft) ID in swelling rock using deformable grout.View More
The project involved construction of 24 feet (7.3m) diameter tunnels and ten shafts including ground freezing as an excavation support system for two shafts up to 145 feet deep (44m).View More
Project comprised of two 12.4 m (41 ft) ID concrete-lined diversion tunnels, each about 10 km (6.2 miles) long, and an underground powerhouse complex with 26 m (65 ft) wide powerhouse with installed capacity of 600 MW. The exploratory audit was constructed to assess the rock mass properties and time-dependent behavior of squeezing and swelling mudstones and shales.
Project comprised surface and large underground reservoirs using an existing limestone mine to generate 1500 MW of power. Field investigations involved drilling in the mine located 670-m (2,200 ft) underground to determine rock mass properties, in situ stress measurements and grout takes
Karun III comprised a 180 m (560 ft) high multiple arch dam and a large underground powerhouse 244 m (600 ft) long (powerhouse 25 m (82 ft) wide, transformer galleries 21 m (69 ft) wide, inlet valve 10 m/33 ft wide) in karstic limestone.View More
Project comprised the design of 4,4 km (2.7 miles) long, 6 m (20 ft) diameter storm overflow sewer in squeezing and swelling shales and four 8 m (26 ft) diameter vertical shafts through overburden glacial till deposits up to 70 m (230 ft) deep.
Project comprised a construction of water tunnel in soil using ribs and lagging as support followed by cast in place concrete.
Utilidor approximately 700 feet (213m) of 13 (4m) by 12 foot (3.6m) horseshoe-shaped utility tunnel bored at depths of approximately 150 feet below ground surface in hard rock connecting the Bronx and Manhattan, east of the Brooklyn Bridge.
Engineering services on Yard Lead Approach structure.
The project involved the construction of the underground water treatment plant within the Mosholu Golf Course in the Bronx, NY. Treatment plant required deep and extensive excavations in rock.
Four new 138 kV underground transmission circuits between the Mott Haven Substation in The Bronx and the Park View Substation in Manhattan, New York were installed. This included crossings of the Harlem River, Harlem River Drive and a rail yard in soil and rock (2 crossings in soil 2 in rock about 1,000 ft each).
Project comprised of extension of existing hydroelectric site at Owen Falls, on the River Nile; included new powerhouse with maximum installed capacity of 150 MW and a canal. Situated on amphibolite and saprolite foundation.View More
Project comprised of a 30-m (98 ft) high zoned earth-fill dam, zoned partial cutoff and zoned inverted filter and three 15 MW powerhouses located downstream along the river.