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In the past couple of months, Ground Penetrating Radar Systems has worked several times for the John E Green Co. on the new Greektown Casino Hotel project in downtown Detroit, MI. The hotel is a new 30 story cast-in-place concrete structure with post-tension cables. John E Green is the lead mechanical contractor on the job and has needed to move and add several hole penetrations for their piping. John E Green has hired GPRS to scan and locate the post-tensioning cables prior to moving and drilling any new holes that have needed to be made. John Kessinger from GPRS – Toledo Division has been the lead technician on the job and has marked out post-tensioning at an estimated 30-40 locations. All of the locations have been drilled without striking any of the post-tensioning cables. Due to the success of the work Ground Penetrating Radar Systems has provided to John E Green, lead electrical contractor Motor City Electric has asked GPRS to layout post-tensioning as well. The high-resolution GPR equipment used by GPRS and the experience of their technicians has resulted in an excellent track record for mapping out post-tension cables and rebar in concrete floors. GPRS services are usually available in 1-3 business days and sometimes available in the same day as when the call was made. You can contact John Kessinger – Regional Director for Michigan and Northwest Ohio at (419) 467-1444 or by email at john.kessinger@gp-radar.com.

John Kessinger from GPRS, Inc. performs a
concrete
radar scan
at the edge of the 20th story on the
Greektown
Casino Hotel project
in Detroit, Michigan.
The
ground
penetrating radar system
detected the
post-tension
cables through 10” of concrete.
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