The Ovit Tunnel consists of twin two-lane traffic tunnels, approximately 7.8-miles in length, crosscutting Mt. Ovit in Turkey. Built to bypass the Ovit Pass, the Ovit Tunnel will provide access to the Black Sea for the Eastern Anatolia region and allow uninterrupted year-round transportation between the Rize and Erzurum Provinces.
Gall Zeidler Consultants (GZ), in association with HBI Haerter, developed a ventilation design for the tunnels. The design included assessment of required ventilation infrastructure, numerical analyses for simulation of tunnel aerodynamics and algorithms applied to ventilation equipment dynamic control. A 3-D computational fluid dynamic simulation was also conducted.
İkizdere, Rize Province and İspir, Erzurum Province, Turkey
2012 - 2018
Twin Highway Tunnel; Ventilation Pilot Tunnel
Highway Tunnels – 7.8 mi (12.5 km)
Pilot Tunnel – 1.1 mi (1.7 km)
Pilot Tunnel – 611 ft2 (56.7 m2)
Granitoids, porphyries, and basaltic lava flows
~$193 million USD
TTS International Engineering & Architecture Co. Ltd
General Directorate of Highways