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September 2016
Volume 68    Issue 9

World’s largest live tunnel connection at TARP McCook Tunnel

Mining Engineering, 2016, Vol. 68, No. 9, pp. 168-168
Oksuz, Faruk; Sanchez, Miquel; Padilla, Mike; Schiemann, Dave; Scalise, Carmen; Trotter, Matt


PREVIEW:

The McCook Main Tunnel system consists of a 10-m (33-ft) finished diameter, 490-m (1,600-ft) long, hard rock tunnel constructed from a 27.5-m (90-ft) diameter and 92-m (300-ft) deep main gate and tunnel construction access shaft. The gate shaft houses six, high-head 4.4 m by 9 m (14.5 ft by 29.5 ft) wheel gates to be installed in the bifurcated and steel-lined section of the tunnel. The tunnel also includes portal and energy dissipation structures as it daylights into the reservoir.  



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