Post-tension anchors were selected to repair a 65-foot long by two-inch wide crack that spanned the length of one of Wanapum Dam’s monoliths. The entire drilling, grouting and anchor tensioning processes were performed with the assistance of divers using remote cameras to allow engineers at the surface to witness the underwater operations.

Nicholson was awarded the design-build contract to replace an existing force main from the Virginia Key Central District Wastewater Treatment Plant (CDWWTP) under Biscayne Bay Norris Cut to Fisher Island. The contract included the planning, engineering, design, permitting, procurement, construction / installation, testing and the start-up of the replacement force main.

After a massive fire destroyed everything but the exterior façade, the Church of Jesus Christ of Latter Day Saints decided to restore a historic Tabernacle in Provo, Utah, and convert it into a Temple in the process. Nicholson was tasked with developing and constructing an elaborate underpinning system so that two levels of basement could be constructed below the structure. The work also included the construction of a support of excavation system around the entire complex and a ground water and cutoff wall and dewater system.

Nicholson installed a mortar grout mix to fill voids in rock layer 7 ahead of the TBM operations in some of the most unpredictable ground conditions in the country for the Port Miami Tunnel Project (POMT.) Grout was installed onshore at Watson Island and Dodge Island using up to three drills and off shore on the Government Cut channel between the two islands with up to ten barges and leads, working 24 hour shifts around the active cruise ship schedule.

Approximately 154,000 square feet of diaphragm wall was constructed top-down to support Columbia University’s Manhattanville Development in Harlem, New York City.

Nicholson installed 14,000  linear feet of grout curtain around the McCook Reservoir for the combined sewer overflow (CSO) system. The entire grouting process was computerized through the use of GROUT I.T., a state-of-the-art computerized grouting control and data collection system developed by Nicholson’s parent company, Soletanche Bachy.  At the time, the McCook Reservoir project was the largest computerized grouting project in the country.

Nicholson constructed a 50-foot-high cantilevered retaining wall with barrettes for the Abingdon Heights Condominium Tower in Arlington, VA.  This is believed to be the tallest top-down cantilevered wall in the world.

Nicholson performed extensive geotechnical work at the World Trade Center Transportation Hub, including jet grouting and micropile installation through and under the active #1 Subway Line.

Nicholson constructed a diaphragm wall support of excavation system for the U.S. Capitol Visitor Center project in Washington, DC.

A Nicholson-led joint venture installed nearly 1,000 anchors to stabilize the World Trade Center bathtub and facilitate recovery efforts.