TUNNELING
FEATURED PROJECTS

Ashbridges Bay Treatment Plant Outfall
Toronto, CanadaThe Mill Creek project is currently the largest water tunnel project under construction in North America.
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Mill Creek Drainage Relief Tunnel
Dallas, TXThe Mill Creek project is currently the largest water tunnel project under construction in North America.
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Jollyville Transmission Main Tunnel
Austin, TXThis $103M tunnel project consisted of a 12 ft. diameter tunnel over 350 ft. below existing ground from the Austin's Water Treatment Plant No. 4 to the Jollyville Reservoir.
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Liberty University Vehicular Tunnel
Lynchburg, VAThis project was recognized as one of the best projects of the year by ENR Mid-Atlantic in 2015. Our crews successfully completed construction of a vehicular tunnel project at Liberty University...
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Lake Mead – Intake No. 3 Connector Tunnel
Las Vegas, NVThis project, located near the Hoover Dam, consisted of a deep water intake, a pumping station, and a large diameter water supply tunnel between the intake shaft and pumping station. The...
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Kaneohe/Kailua Sewer Tunnel Project
Honolulu, HawaiiDuring periods of heavy rain, the City and County of Honolulu can experience overflows and spills at its Kaneohe Waste Water Pre-Treatment Facility. The solution is to connect the Kaneohe facility...
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Bi-County Water Tunnel
Laurel, MarylandThe Washington Suburban Sanitary Commission needed to transmit clean drinking water from the Potomac Water Filtration Plant to Montgomery and Prince George’s counties. With only three shafts to serve a length...
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New Irvington Tunnel
Sunol, CaliforniaWhen San Francisco needed to replace the entire area’s critical clean water supply, built in 1932, to meet new earthquake-resistance standards, they turned to...
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Ashbridges Bay Treatment Plant Outfall
Toronto, CanadaThe Mill Creek project is currently the largest water tunnel project under construction in North America.
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Mill Creek Tunnel, Contract 2
Cleveland, OHThis project included the excavation of 13,200 lf of 23-ft, 8-in diameter tunnel for a sanitary sewer through shale and 2,015 lf of 10-ft diameter exploratory tunnel through shale including shaft...
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Mill Creek Tunnel, Contract 3
Cleveland, OHThis project included the excavation of 14,775 lf of 23-ft, 8-in diameter tunnel for a sanitary sewer through shale and 470 lf of 10-ft diameter tunnel through shale including shaft excavations...
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No Business Creek Tunnel and Lift Station
Atlanta, GAThis project consisted of 5 shafts, approximately 16,000 lineal feet of tunnel, a 10 MGD pump station and 2 odor control facilities.
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Eastside Water Supply Raw Water Intake Tunnel
Rochester, NYThis project provides critical redundancy to the Rochester, New York community’s main supply of fresh water by providing a second major source of Lake Ontario water for the system.
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Liberty University Vehicular Tunnel
Lynchburg, VAThis project was recognized as one of the best projects of the year by ENR Mid-Atlantic in 2015. Our crews successfully completed construction of a vehicular tunnel project at Liberty University...
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Lake Mead – Intake No. 3 Connector Tunnel
Las Vegas, NVThis project, located near the Hoover Dam, consisted of a deep water intake, a pumping station, and a large diameter water supply tunnel between the intake shaft and pumping station. The...
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Mill Creek Tunnel, Contract 1
The Mill Creek tunnel is a subway-sized underground pipe meant to capture and hold sewage and stormwater until it can be treated. The tunnel prevents sewer overflows in the...
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Corbalis to Fox Mill 54″ Water Main
Fairfax, VAThis project included furnishing and installation of approximately 12,000 LF of 54-inch watermain by shafts and tunnel method. Installation of associated valves...
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Schoharie Reservoir Low Level Outlet
Town of Gilboa, NYLocated in the Catskills region of Upstate New York State, the Schoharie Reservoir and tunnel will provide a significant portion of daily water to New York City. The reservoir was created...
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North MacGregor Storm Sewer Relief Tunnel
Houston, TXThe tunnel was located beneath the main thoroughfare leading to the main hospitals in downtown Houston on North Macgregor Drive...
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Hanlan Feedermain & Mississauga City Center Water Main Contract No. 3
Ontario, CanadaThe Hanlan Feedermain and Mississauga City Centre Watermain is the largest and most extensive infrastructure project completed by the Region of Peel. Population growth in both Hanlan and Mississauga necessitated the...
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Kaneohe/Kailua Sewer Tunnel Project
Honolulu, HawaiiDuring periods of heavy rain, the City and County of Honolulu can experience overflows and spills at its Kaneohe Waste Water Pre-Treatment Facility. The solution is to connect the Kaneohe facility...
View Details
Bi-County Water Tunnel
Laurel, MarylandThe Washington Suburban Sanitary Commission needed to transmit clean drinking water from the Potomac Water Filtration Plant to Montgomery and Prince George’s counties. With only three shafts to serve a length...
View Details
New Irvington Tunnel
Sunol, CaliforniaWhen San Francisco needed to replace the entire area’s critical clean water supply, built in 1932, to meet new earthquake-resistance standards, they turned to...
View Details