Tunneling

Excavation begins for Ontario Line’s first downtown subway tunnels

Excavation has started near Exhibition Station for the Ontario Line’s tunnel boring machine (TBM) launch site. This 16-meter-deep shaft will mark the starting point for two TBMs that will create twin tunnels spanning approximately six kilometers—the first downtown subway tunnel project in Toronto in over 60 years.

DC Water continues progress on Potomac River Tunnel Project

DC Water has opened a new road as part of the Potomac River Tunnel (PRT) Project. The road provides an easy way to get around the main construction site in West Potomac Park, which will remain active until the project's completion in 2030.

Alaska Transportation Dept. to spend $1 million on feasibility study for tunnel megaproject

Alaska state transportation officials will conduct a $1 million feasibility study to evaluate its proposed transportation tunnel connecting Anchorage and Point MacKenzie, according to Anchorage Daily News.

Lynchburg, Va., breaks ground on largest-ever Blackwater CSO tunnel project

On Oct. 29, the City of Lynchburg broke ground on the Blackwater CSO Tunnel Project, a milestone in local infrastructure and the largest capital improvement in the city’s history. Known as LYHBeyond, the project aims to significantly reduce combined sewer overflows (CSOs) and safeguard the city’s waterways.

California's Anderson Dam tunnel project marks milestone as completion nears

To complete the tunnel’s last 347 feet, crews used a specialized micro-tunnel boring machine, maneuvering it 30 feet beneath the reservoir’s surface. After the boring was done, divers and construction teams carefully removed the machine from the tunnel’s endpoint using a large crane.

Frontier-Kemper wins $1.1 billion New York tunnel project

(UI) – Tutor Perini subsidiary Frontier-Kemper Constructors has been awarded a contract valued at approx. $1.1 billion by the New York City Dept of Environmental Protection for the Kensico-Eastview Connection Tunnel Project.

Tunnel boring machine ‘Clack-A-Mole’ nears one-third completion in Oregon outfall project

As of Sept. 24, Clack-A-Mole has mined 770 feet of the total 2,370-foot tunnel, reaching 32% completion. Clack-A-Mole, weighing a massive 225,000 pounds, is currently averaging about 32 feet of progress per day as it digs a path toward the river.

Norfolk's HRBT expansion gears up for second tunnel excavation

In Norfolk, Virginia, crews are preparing to launch the tunnel boring machine (TBM) known as Mary for the second phase of the Hampton Roads Bridge-Tunnel (HRBT) expansion.

Newburgh, N.Y., completes $31 million sewer project using microtunneling for underground pipeline

The project installed 8,700 feet of new sewer pipes and used microtunneling for over 2,000 feet of underground pipeline to improve capacity and reduce pollution in the Hudson River.

Laredo, Texas, launches $30 million project to expand wastewater capacity

The project will see the construction of a 7,000-foot tunnel, designed to improve the system’s ability to move up to 10 million gallons of wastewater per day.

Queens, NY, completes $106 million Phase 2 sewer upgrade in Maspeth

The NYC Department of Environmental Protection and the NYC Department of Design and Construction have completed a $106 million infrastructure project in Maspeth, Queens, marking the second phase of a three-part initiative to establish a new drainage network in central Queens.

Seattle's SR 99 tunnel to undergo first six-year inspection

The Washington State Department of Transportation will conduct a comprehensive six-year inspection, which is required due to the tunnel's unique structure and federal regulations.

Texas A&M weighs underground transit plan with Elon Musk's Boring Co. to reduce campus traffic

Texas A&M University is exploring a collaboration with Elon Musk’s Boring Co. to create the "Aggie Loop," an underground electric transit system to reduce campus congestion. The project, estimated at $250-350 million, would connect key areas on campus with minimal environmental impact. It’s expected to take three years to complete.

Colorado's Wolf Creek Pass tunnel drainage project begins

The project involves upgrading the current drainage system beneath the eastbound lane, installing manholes for easier maintenance, and replacing damaged concrete panels. Delineators will also be added near the new drainage structures.

Enbridge agrees to reapply for key permit, stalling Line 5 tunnel project

The Army Corps of Engineers has extended its environmental review, pushing the project’s potential start date to 2026. Enbridge must now apply for a new water resources permit incorporating updated wetland data before moving forward.

Remembering Bob Affholder: A legacy of passion and innovation in the CIPP, tunneling industries

(UI) — Robert (Bob) Wilson Affholder, a true industry giant by any measure or perspective, passed away in late July after a brilliant career that amazed, impressed and established his footprint upon essence of both cured-in-place pipe rehabilitation and the tunneling industry.

Lynchburg, Va., begins work on $400 million Blackwater CSO tunnel to protect waterways

Construction has started on the Blackwater CSO Tunnel, the largest capital improvement project in Lynchburg's history. The nearly mile-long, 12-foot diameter tunnel will be built 70 to 120 feet below Blackwater Creek.

Parsons to oversee Manchester, N.H., $16 million Cemetery Brook Drain tunnel project

The $16 million contract, spanning three years, includes program and construction management services aimed at mitigating flood risks and eliminating combined sewer overflow (CSO) discharges into the Merrimack River.

British Columbia selects design team for new eight-lane Massey tunnel

The next stage of design for the toll-free, eight-lane tunnel replacing the George Massey Tunnel is set to move forward, with the Fraser River Tunnel Project selecting Cross Fraser Partnership as the preferred team to lead the design.

GDC awards first tunnel boring contract for NY-NJ project for $465 million

The Palisades Tunnel Project will construct the first mile of 5,100-foot twin tunnels on the New Jersey side, including boring, lining with waterproof concrete, and creating the Hudson County Shaft for Tunnel Boring Machine removal.

Stantec manages $104 million Blackwater sewer overflow tunnel in Lynchburg, Va.

The $104 million Blackwater CSO tunnel will have a diameter of 12 feet and will be located 70 to 120 feet below ground, providing about 4.7 million gallons of storage capacity.

GDC secures $16 billion for Hudson Tunnel project, set to create 95,000 jobs

The Gateway Development Commission has finalized the funding needed for the Hudson Tunnel Project, securing a total of $16 billion. The HTP, a major underground infrastructure project, will replace and expand the aging rail tunnel beneath the Hudson River.

Elon Musk’s Boring Company faces new tunneling violation in Austin

The complaint, lodged by Bastrop resident Chap Ambrose, alleges that The Boring Company initiated tunneling at the Gigafactory in Austin without the necessary permits.

Virginia town set to begin $104 million CSO tunnel project

The Blackwater CSO Tunnel will be a nearly mile-long, 12-foot-diameter underground tunnel located 70 to 120 feet beneath Blackwater Creek. It is designed to collect and store up to 4.7 million gallons of combined sewage and stormwater during heavy rains, preventing wastewater from overflowing into local waterways.

Bechtel to oversee tunnel construction in $12.7 billion BART Silicon Valley extension

The Santa Clara Valley Transportation Authority has awarded Bechtel Infrastructure Corporation a contract to manage construction of the Bay Area Rapid Transit’s (BART) Silicon Valley Phase II extension.

Construction begins on new water pipeline project in Kyle, Texas

At over 20 miles in length, Segment C marks the final segment of the Alliance Water transmission system to begin construction and is anticipated to be completed in Fall 2025.

EarthGrid successfully field tests tunnel boring robot, launches two-torch plasma excavation system

With a more powerful and efficient tunneling system on the horizon for the EarthGrid team, this technology will create underground pathways to connect transmission and fiber cabling from providers to homes, data centers and businesses, delivering reliable and resilient energy and internet access nationwide.

Boring machine 'Chessie' resumes drilling at Chesapeake Bay Bridge-Tunnel site after anchor incident

After months of investigation and repairs, the tunnel boring machine, affectionately known as Chessie, has resumed tunneling operations after striking a buried anchor nearly 10 months ago.

Hudson Tunnel Project set to generate 95,000 jobs during construction phase, report says

According to a recent study by the Regional Plan Association (RPA), the Hudson Tunnel Project, valued at $16.04 billion, is expected to generate 95,000 jobs during its construction phase, surpassing previous projections by a significant margin.

San Diego begins installation of new pure water pipeline at Miramar Reservoir

Completion of the 1-mile branched pipeline along the Miramar Reservoir bed includes pipeline assembly on shore before the pipe is loaded onto barges and permanently installed underwater. Over 1,100 feet of tunneling to reach the reservoir was completed earlier this year, and work is now underway to complete construction of the pipeline at the reservoir.

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