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Re: Mullan Tunnel
Author: tom koller
Date: 08-08-2009 - 09:32

There aren't many active "sand hogs" around these days so MRL might be in for a rough go as tunnel cave ins are risky, specialized problems which require experienced tunnel workers and qualified engineers. The tunnel ceiling must be stabilized before materials can be removed and that is usually the hard part of the job because there generally is a dome created by the cave in and it frequently is unstable.

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Subject Written By Date/Time (PST)
  Mullan Tunnel Nancy Stein 07-29-2009 - 16:42
  Re: Mullan Tunnel PNWRailfan 07-29-2009 - 16:49
  Re: Mullan Tunnel Ross Hall 07-29-2009 - 16:56
  Re: Mullan Tunnel Kyle 07-29-2009 - 19:52
  Re: Mullan Tunnel tom koller 08-08-2009 - 09:32
  Re: Mullan Tunnel Kyle 07-29-2009 - 19:56
  Re: Mullan Tunnel / Mr. Brehm has front row seat Bruce Kelly 07-30-2009 - 06:54
  Re: Mullan Tunnel / Mr. Brehm has front row seat Kyle 07-30-2009 - 15:27
  Re: Mullan Tunnel / Mr. Brehm has front row seat Bob Jennings 08-01-2009 - 18:08
  Re: Mullan Tunnel Kyle Brehm 08-03-2009 - 18:53
  Re: Mullan Tunnel Tom Moungovan 08-04-2009 - 07:04


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