Nicholson Construction project helps test stealth planes

February 13, 2012 rockman Project Related Comments Off on Nicholson Construction project helps test stealth planes
Hill Air Force Base cutter soil mixed retaining wall or CSM by geotechnical contractor Nicholson Construction

Hill Air Force Base cutter soil mixed retaining wall or CSM by geotechnical contractor Nicholson Construction

Nicholson Construction built a cutter soil mixed (CSM) retaining wall for an unusual application at the Hill Air Force Base in Ogden, Utah. A 50-ft diameter by 50-ft deep shaft was constructed using CSM as temporary shoring to construct a turntable and pylons to allow an F-22 Raptor and other stealth aircraft to be raised to a height of 20 feet to allow radar testing of low observable coatings (stealth paint). The CSM shoring was also used for a portion of access tunnel for the shaft and pylons. The CSM panels were overlapped to create a water-tight seal and prevent seepage and eliminate the need for dewatering, a tricky and expensive proposition with the contaminated ground present at the site. Read more about the project at the link below. [Source: Nicholson Construction. Image: Nicholson Construction]

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Press Releases

Nicholson Awarded a Contract on the MTA’s Second Avenue Subway Project

January 20, 2010 rockman Press Releases Comments Off on Nicholson Awarded a Contract on the MTA’s Second Avenue Subway Project

Nicholson Construction CompanyPITTSBURGH, PA – January 18, 2010 – Nicholson was recently awarded a subcontract by E.E. Cruz and Tully Construction Co., a Joint Venture that includes approximately 200,000 SF of diaphragm walls for the construction of the 96th Street station box as part of New York City’s Second Avenue Subway project. Nicholson’s contract also includes jet grouting for a subgrade strut, water cutoff, and temporary support of excavation; compensation grouting for two buildings at excavations for ancillary structures; micropiles within an existing building; and curtain grouting in rock. The project owner is the Metropolitan Transit Authority. [Editor] Click through for the entire press release from GeoPrac.net sponsor Nicholson Construction. [/Editor] […]

Howard Hanson Dam grouting by Nicholson Construction
Press Releases

Nicholson Completes Howard Hanson Grout Curtain Project

August 2, 2010 rockman Press Releases Comments Off on Nicholson Completes Howard Hanson Grout Curtain Project

Howard Hanson Dam grouting by Nicholson Construction

PITTSBURGH, PA – July 30, 2010 – In early 2010, Nicholson Construction Company finished the construction of a double-line grout curtain at the Howard A. Hanson Dam in western Washington State. This high profile project was completed under a very strict schedule and heavy public scrutiny.

Howard A. Hanson Dam, built in 1962, is an earth embankment dam. The dam embankment is 235 feet high and 675 feet long. The composition of the right abutment foundation is partially bedrock and unconsolidated alluvial and landslide material. The right abutment has leaked since the dam became operational. A leak in January 2009 filled the reservoir higher than ever, prompting the U.S. Army Corps of Engineers (USACE) to reclassify Hanson Dam as “unsafe” with an “urgent and compelling” need for immediate action.

[Editor] Click through for the rest of this press release from GeoPrac.net Premier Sponsor Nicholson Construction Company [/Editor]

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