ORDU RING ROAD TUNNELS EMPLOYER ADMINISTRATION : NUROL İnş. ve Tic. A.Ş. + YÜKSEL İnş. A.Ş.+ ÖZKA İnş. A.Ş. + YDA İnş. JV. DATE OF CONTRACT and COMPLETION : 01.07.2012 – 20.12.2016 WORK PROPERTIES : 7km Highway Tunnel construction and concrete works