We need the services of a qualified retired mining engineer who can view photos of mining sites and advise us of the proper methods that would have been used to ventilate the mine and methods of disposing of material removed from various tunnel systems. Research the methods and equipment required to complete the work, along with a time study as to the length of time that would have been required.
File a report on various photos submitted to this web site with your educated opinion.
This will help us to understand the time and labor involved in creating these mines and tunnel systems.
Making things safe for the miners involved in wilderness areas around the United States, Central and South America, Canada and Europe.