Picture of the South Portal entrance to Yucca Mountain. The large device to the left is the TBM that excavated the main tunnel which is called the Exploratory Studies Facility. The tunnel is 5 miles long and is U-shaped. Repository will be 1000 feet below the surface of the mountain and 1000 feet above the water table. Image by Daniel Mayer taken on 2002-03-25 © 2002 and released under terms of the GNU FDL.

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(taken from [1])