File:Tunnel Boring Machine - Mole.jpg

Summary
Tunnel boring machine at the construction of Yucca Mountain. From: www.ymp.gov/documents/feis_2/vol_1/ch_02/figv1c2/f_2_14.htm This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code.