Drilling Rock Star, Jeff Hart
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The Drillers, Rigs, Rock and Hart of the Chile Mine Rescue

Drilling Rock Star, Jeff Hart As 33 trapped miners waited more than 2,000-ft underground for their rescue, a whole team of Chilean government officials, mining engineers, equipment manufacturers and of course drillers came together get the job done.  Jeff Hart, a driller from Denver, Colorado was one of the stars of the day.  Hart was in Afghanistan drilling deep water wells when he got the call and hopped on a plane.  He works for Kansas-based Layne Christensen, and along with 3 other Layne employees, he manned the Schramm T130 drill rig that was part of “Plan B” that eventually became the shaft from which the trapped miners were rescued.

matt_sttafell_jorge_herreraOn the drilling platform overseeing the drilling was James Stefanic of Layne, and crew members Matt Staffel, Doug Reeves and Jorge Herrera.  The rig and I presume some of the support equipment was owned by Layne’s Latin America affiliate, Geotec Boyles Bros, SA.  The drill bits were from Center Rock, Inc. of Berlin, Pennsylvania.  The Center Rock CEO, Brandon Fisher, was on site throughout the operation as well.

Read on for more info, photos, video and links on the drilling, drillers and geology of the Chile Mine rescue.

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Los Olmos tunnel project under the Peruvian Andes Mountains
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Los Olmos Tunneling Resumes

The construction of a 20-km tunnel that travels some 6,900-ft below ground has finally restarted after being broken down for several months after being damaged by a rock burst. The Los Olmos tunneling project will […]

Road header breaking through at Devil's Slide Tunnel
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Devil’s Slide Breakthrough Video and Links

Road header breaking through at Devil's Slide Tunnel The “breakthrough” media event for CALTRANS’ Devil’s Slide Tunnel project was this past Friday.  A large crowd of politicians, news crews and locals were on hand as a road-header broke through a shotcrete face in a ceremony to mark the completion of the excavation portion of the first of two tunnels.  It will still be over a year until the tunnels are opened to traffic.  The second tunnel is expected to breakthrough as early as this week. (Photo by SFGate.com)



Caltrans tunnel punch-through from Barry Parr on Vimeo.

The Video came from the Coastsider, the page also has comments from the videographer, Barry Parr, which offer a good perspective on the event.

Click on through for more links etc.

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464px-Hoover_Dam-USA
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Hoover Dam Celebrates 75th Anniversary

464px-Hoover_Dam-USA On September 30, 1935, President Franklin D. Roosevelt dedicated the Hoover Dam, telling the 10,000 people gathered at the ceremony that it was a “great feat of mankind” destined to reshape “the geography of a whole region.”  The American Society of Civil Engineers calls it one of the “Seven Modern Civil Engineering Wonders.” In honor of this significant milestone for this fantastic structure, I’ve collected some facts and figures, news articles, information on the bypass bridge, and some concerning news about the future of the dam’s ability to supply power.  Click through for more.

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Leica automated motorized total station excavation support deformations
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The Cycles of Clough

At last month’s Earth Retention Conference, ER2010, there were many references to the second ER conference in 1990. One paper from that proceedings that garnered many mentions and was referenced by several at this year’s […]