Excerpt from Report of the Commissioners and Evidence Taken by the Committee on Mines and Mining of the House of Representatives of the United States, in Regard to the Sutro Tunnel: Together With the Arguments and Report of the Committee, Recommending a Loan by the Government in Aid of the Construction of Said Work Total time required to sink shafts and run drifts. Additional time required to enlarge tunnel to full size 'total time required to complete main tunnel. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.