• City of Atlanta Water Supply Program

    Providing water sustainability for the next 100 years.

    Read More
  • Highway 401/409 Railway Tunnel

    A railway tunnel under 20 lanes of traffic on Highway 401.

    Read More
  • Ottawa Combined Sewage Storage Tunnel

    Digging in against combined sewer overflows.

    Read More

Creating tunnels without tunnel vision

With a promise to design with community in mind, we focus on risk avoidance and mitigation with robust management programs that maximize constructability to deliver solutions that provide the best overall value to you. Read More

No matter what challenges you face, it will work in the end.

Dave Krywiak Principal, Tunneling and Trenchless Specialist
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One of the most challenging tunneling projects in the world

Approximately 90% of the drinking water delivered to customers in southern Nevada comes from the Colorado River, which is captured at Lake Mead. Construction of this new intake ensures that full system capacity can be maintained at low lake levels. The $520M project consisted of a 600-foot deep intake, new 900 MGD pumping station, and 3 miles of up to 20-foot inside diameter water supply tunnel. Read More

Connecting a community while maintaining daily train traffic

Fossil Creek Trail is a set of two separate paved pathways, totaling 5.3 miles, running through neighborhoods and local parks that the City of Fort Collins is working on connecting. Complicating this effort is an existing Burlington Northern Santa Fe Railroad system—a main freight corridor along Colorado’s Front Range. We worked with the city on a solution that maintained the daily train traffic by using a below grade tunnel rather than a more traditional crossing. Read More
We are built for the tunnel ahead
underground projects in the past five years
ranked trenchless design firm
staff with tunneling experience

Expert Spotlight

Don Del Nero, Vice President, Sector Leader, Tunnels & New Trenchless

From transit tunnels to water and sewer tunnels, my career improves the quality of life for millions of people in major metropolitan centers.
Don Del Nero Vice President, Sector Leader, Tunnels & New Trenchless Read More

Anil Dean, Tunnels and Trenchless Practice Leader

The interaction of value, project needs, and the ground makes for great variety and no two projects are ever the same.
Anil Dean Tunnels and Trenchless Practice Leader Read More

Keivan Rafie, Lead Tunnel Designer

Coming back to a project area years later to see how the community has benefited from what I designed is incredibly satisfying and inspiring.
Keivan Rafie Lead Tunnel Designer Read More

Fangbiao Lin, Vice President, Global Practice Leader for Environmental Hydraulics

CFD modeling is my passion, solving flow problems is my satisfaction!
Fangbiao Lin Vice President, Global Practice Leader for Environmental Hydraulics Read More

Nick Cioffredi, Principal

You’d be amazed how many bridges you drive over on a daily basis and don’t realize that you’re on a bridge. My job out there is to keep our neighbors and communities safe.

Steve Fradkin, Tunneling Technology Manager

Although the work and results are generally unseen, the results of my work benefit everyone.
Steve Fradkin Tunneling Technology Manager Read More
  • Don Del Nero

    Vice President, Sector Leader, Tunnels & New Trenchless

  • Anil Dean

    Tunnels and Trenchless Practice Leader

  • Keivan Rafie

    Lead Tunnel Designer

  • Fangbiao Lin

    Vice President, Global Practice Leader for Environmental Hydraulics

  • Nick Cioffredi

    Tunnel Inspector

  • Steve Fradkin

    Tunneling Technology Manager

Related Services

Environmental Services With 3,100 environmental staff in 20 specialties, we know what to do. When we’re gathering data to permit a new project or collaborating on a plan to remediate an old one, our passion for science drives us.
Geotechnical Engineering & Materials Testing Our geotechnical engineers and material specialists are focused on solving complex design, construction, and rehabilitation issues impacting the communities where we live and work.
Transportation Services Working within the context of the communities we serve, we provide planning, engineering, and infrastructure management services that fit the needs of our clients and improve the overall traveler experience.
Trenchless Our expertise in trenchless technologies lets you build, maintain, or replace pipes while minimizing surface disruption.
Water and Wastewater Services Through the life cycle of capture, use, reuse, and discharge, our team works to optimize every facet of a water system

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