... before discussing the Kemano Backup Tunnel Project last Wednesday. According to Petersen, the underground construction industry is expanding rapidly with some companies experiencing 20% growth in employee size each year. The work involved in ...
http://www.oredigger.net/news/8-news/2765-tunnel-boring-technology-digs-deeper.html
http://www.oredigger.net/news/8-news/2765-tunnel-boring-technology-digs-deeper.html
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