Nicholson Returns to Baltimore for Next Phase of M&T Bank Stadium Upgrade

December 14, 2017
Pittsburgh, PA

Pittsburgh-based geotechnical contractor Nicholson Construction Company has returned to Baltimore, Maryland, for phase two of the nearly $145 million M&T Bank Stadium upgrade. Nicholson completed phase one in April 2017 and is back to finish the foundation work for two new escalators and elevators to improve accessibility to upper level suite seats.

Nicholson is installing 7-inch diameter micropiles to support the vertical structure’s new and existing footings, and concrete columns and pilasters to reinforce the existing structural basement wall. The micropiles will extend up to 78 feet below grade and have a center bar inserted in the column for added support.

“Mobilization is limited since we’re performing deep foundations inside the basement of Ravens’ stadium,” said Eric Blue, Nicholson Project Manager. “Micropiles are a great option for this project because we are still able to drill to the desired depths, but the rig’s short mast can operate in areas with low headroom.”

For both phases, the company is using a method of straight duplex drilling and drill water recirculation. This approach entails pumping the soiled water directly from the drill into a series of weir tanks, that gradually separate the soil and water. The clean, filtered water is then recirculated back to the drill.

“This method is really efficient, because spoils that would’ve been discharged at the surface are now contained in a series of weir tanks,” said Blue. “Cleanup is also much easier. That was a huge consideration since Nicholson is drilling and operating inside a finished structure.”

Nicholson has performed deep foundations for several other stadiums, including Spartan Stadium at Michigan State University and Beaver Stadium at Pennsylvania State University. Phase two at M&T Bank Stadium is anticipated to wrap up in early January 2018.

About Nicholson Construction Company

Nicholson has been both a leader and an innovator in the geotechnical construction industry for more than 60 years. With regional offices across the country and headquarters located in Pittsburgh, Nicholson is a nationally renowned specialty contractor, offering proven expertise in the design and installation of deep foundation elements, earth retention systems and ground treatment solutions. We pride ourselves on our ability to consistently provide our clients with innovative, high-quality design-build options for projects of varying size and complexity. Nicholson is the North American subsidiary of Soletanche Bachy, one of the world's leading geotechnical contractors, and is part of a global network of unparalleled geotechnical resources and expertise.