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History, 26.09.2019 14:30 clickbaitdxl
Now, think about everything that you read. why was building the summit tunnel considered an engineering marvel? write a paragraph that explains your ideas.
it was very long, just over one-third of a mile.
it was built through hard stone called granite.
crews built it from both ends and from the middle, and the tunnels were just two inches off.
it was 124 feet inside the mountain,.
it was built entirely by hand.
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