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Blog Entry# 4377262
Posted: Jul 13 2019 (21:04)
6 Responses
Last Response: Jul 14 2019 (02:15)
6 Responses
Last Response: Jul 14 2019 (02:15)
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AmishKumar^~ 4295 news posts
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5 Public Posts - Sat Jul 13, 2019
it depends on the type of stone. this isn't a metro tunnel where most of the boring is through soil. its made of quartz which is one of the hardest found common mineral which is bound to take time to bore through. this is one of the prime reason that the other tunnel is still usable even though it was built in 1861.