Three projects involving Stiver Engineering were featured in the latest Tunnel Business Magazine list of major tunnel projects underway in the United States and Canada.

In Athens, TX, Stiver Engineering is lending our expertise to the Integrated Pipeline Project – Sections 19-1 and 19-2 – a $21 million project for the Tarrant Regional Water District. To date, crews have completed 38% of tunnel footage and completed five of the 10 tunnel crossings with an estimated completion of January 12, 2023.

In Dallas, TX, Stiver Engineering is assisting in the Mill Creek/Peaks Branch/State Thomas Drainage Relief Tunnel Project – a $206.7 million job with an estimated completion date of March 2023.

To date, 19,500 lf of tunnel excavation has been completed.

For the city of Toronto, Stiver Engineering is proud to support the $300 million Ashbridges Bay Treatment Plant Outfall project. Currently 70% complete, the shaft excavation is now ready for tunnel activities. 

If you’re interested in digging deeper into these tunneling projects, click here. 

2022 has started off with full focus on building a better future. We are motivated by the opportunities that are ahead where we can continue to support contractors and developers to design and build new projects. Please check out the second edition of Stiver Solutions, a quarterly newsletter featuring project updates, noteworthy news and highlights of our team. If you would like to join our mailing list, or would like to discuss any of the projects please click here.

Harper Brothers Construction and HB Trenchless recently launched a new Akkerman 96-in. earth pressure balance tunnel-boring machine as part of the Houston Public Works Surface Water Transmission Program. The machine will excavate an 874-ft-long tunnel under IH-69 (US-59) in downtown Houston.

Stiver Engineering provided shoring design services for this project including secant pile shaft design for the launch and receiving shafts as well as designs for the breakout structure for the Akkerman TBM.

A remarkable photo taken by photographer and drone operator Will Byland, clearly captures a bird’s eye view of the impressive 75-ft-deep shaft.

Click HERE to see this amazing photo.

We are proud to introduce Stiver Solutions, a quarterly newsletter featuring project updates, noteworthy news and highlights of our team. We are grateful for the opportunity to work on complex engineering projects. If you would like to join our mailing list, or would like to discuss any of the projects please click here.

To see the inaugural quarterly newsletter click here

Work is underway on a massive water transmission line project in Houston, and Stiver Engineering is proud to play a key role in moving the project forward.

To meet growing population needs in the greater Houston region, the Northeast Transmission Line (NETL) will transmit 365 million gallons of water a day from the Northeast Water Purification Plant through 16.5 miles of 108-inch steel waterlines to approximately 900,000 homes in Harris County.

Stiver Engineering provided key design services for the NETL project. Our work included a shoring design using soldier piles, wale sets, and steel plate and timber lagging. We also developed a design for a temporary bulkhead to grout fill the annulus of the waterline pipe inside the casing pipe and a cradle design to support the existing 84-inch diameter waterline.

The project was featured in Underground Construction magazine’s latest issue. Learn more about the work involved: https://ucononline.com/magazine/2021/august-2021-vol76-no-8/features/taming-a-mammoth-innovative-interconnect-improves-houston-water-operations

Photo Credit: LAN