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Video of Highway 101 Landslide in California
Looks like the Facebook video gets cropped when I embedded it here. You ca
San Francisco Millennium Tower Has Settled 16 Inches
Misrepresents actual foundation geometry. Photos show deep excavation to ne
New FHWA Soil Nail Manual Addresses LRFD, Hollow Bars
Good evening from Barcelona, Spain. I am witting to you because of I am le
Engineering Geologists vs Geological Engineers vs Geotechnic
Geological engineer from Spain (looking for job smiley geoengineer.martin@gmail
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Geologic Hazards
Aerial Video of US 89 Landslide PDF Print E-mail
Written by Randy Post   
Thursday, 21 February 2013 01:34

I saw this video on the ADOT Facebook Page.  The failure seems larger than what I though based on the photos from the ground.

[Source: ADOT Facebook Page]

Last Updated on Thursday, 21 February 2013 08:41
 
Amazing video of 2011 magnitude 9.0 earthquake in Japan PDF Print E-mail
Written by Randy Post   
Monday, 04 February 2013 06:00

Via @davely on Twitter.

Last Updated on Monday, 04 February 2013 06:02
 
Video of a landslide striking and derailing a freight train near Seattle PDF Print E-mail
Written by Randy Post   
Thursday, 17 January 2013 23:25

I think the tile says it all. Check out this amazing video of a train derailed by a 'small' landslide. [Source: Landslide Blog]

Last Updated on Friday, 18 January 2013 06:28
 
Study: Port of Anchorage replacement vulnerable to liquefaction in earthquake PDF Print E-mail
Written by Randy Post   
Tuesday, 18 December 2012 23:26
Port of Anchorage has vulnerability to liquefaction in an earthquake says a CH2M Hill report

A recent study concluded that three of four recently constructed segments of a new port facility in Anchorage, Alaska were not constructed correctly and even if they were, are vulnerable to liquefaction related damage during an earthquake. The $2.2M study was performed by CH2M Hill for the US Army Corps of Engineers and the Federal Maritime Commission. A draft was issued in November, and was recently approved by Anchorage's Geotechnical Advisory Commision and the final version of the report addressing the Commission's comments should be soon to follow. CH2M Hill is conducting an additional $500K of work to lay out options. [Source: Alaska Journal of Commerce. Image: Mark Meyer Photography]

 
Frozen debris flow threatens Trans-Alaskan Pipeline PDF Print E-mail
Written by Randy Post   
Wednesday, 05 December 2012 05:35

Frozen debris flow only 75 yards from Alaska Highway and Trans-Alaska Pipeline

A 300 foot wide frozen debris flow has been moving towards an important Alaska highway and the Trans-Alaska pipeline at a rate of about 1-cm per day...and it seems to be accelerating. The 'Frozen Debris Lobe' as it is referred to by some researchers is now abot 150 feet from the highway, the pipeline is another 700 feet past that. This is a fascinating problem, and one that poses a real threat to the transportation and oil infrastructure of Alaska. But it seems like it will be playing out in slow motion over the coming years. [Source: ADN.com. Image: Guido Grosse / ADN.com]

Last Updated on Tuesday, 04 December 2012 21:50
 
Ohio Sinkhole Devours Four Football Fields Of Land, Stretch Of State Highway 516 Near Dover PDF Print E-mail
Written by Randy Post   
Tuesday, 04 December 2012 14:30
Sinkhole as large as 4 football field forms in Ohio

A sinkhole the size of 4 football fields has opened up in Dover, Ohio. The sinkhole is located near a Lake where an Asphalt company has been dredging for sand some 50 feet below the surface. The formation of the giant sinkhole cause a portion of State Highway 516 to close. The exact nature of the sinkhole is not immediately clear. [Source: The Huffington Post. Image: Huffington Post]

 
Mortrench pitches in to pump out after Sandy PDF Print E-mail
Written by Randy Post   
Tuesday, 20 November 2012 23:09

Geotechnical contractor Moretrench helped with emergency pumping and dewatering efforts in New York City after super storm Sandy

Geotechnical contractor Moretrench (also a valued GeoPrac sponsor) was heavily involved in emergency pumping and dewatering efforts in New York City in the aftermath of super storm Sandy. Every piece of pumping equipment they had was put into service and crews from their Yonkers and Rockaway NJ office worked long hours to get the job done. Remember that dramatic image of water pouring into the ground zero excavation? Moretrench was there at the World Trade Center Memorial and Towers 3 and 4 to pump it dry. They were also at sites like the Brooklyn Battery Tunnel, PATH Tube at Exchange Place, and several area pump stations and sewage treatment plants. After their efforts to dry out municipal facilities, they turned their efforts to private clients. Well done, guys! [Source: Moretrench.com. Image: Moretrench]

Last Updated on Wednesday, 21 November 2012 06:12
 
Maccaferri rockfall barrier passes 6500KJ test in Italy PDF Print E-mail
Written by Randy Post   
Tuesday, 20 November 2012 22:56
Concrete block used for a 6500KJ test for a rockfall barrier in Italy

Maccaferri's prototype P650 rockfall barrier was successfully tested at Fonzaso test centre in Rocciatori in Italy. The mesh was tested with a 16 metric ton (over 36 kip) concrete block dropped from a height of 38 m (125 feet) to generate 6,500 kJ of kinetic energy. After the mesh had stretched, a smaller 2.2 metric ton block was dropped at the same location to prove the system can cope with more than one rockfall at a given location without failure. [Source: New Civil Engineer. Image: NCE]

 
New paper: a historic landslide-induced tsunami in Lake Geneva PDF Print E-mail
Written by Randy Post   
Monday, 12 November 2012 15:57
Modeled Tsunami heights and time to reach portions of Lake Geneva

New research indicates that a tsunami as high as 8 m (26 feet) may have struck on Lake Geneva in the year 563 A.D. A large rockfall at the East end of the lake near the Rhone Delta is thought to be the source of the tsunami that traveled up to 70 km away. Dr. Dave at the Landslide Blog evaluates the paper in more detail. [Source: The Landslide Blog. Image: Kremer et al. (2012) via The Landslide Blog]

 
Dramatic Image of WTC Ground Zero from Sandy Flooding PDF Print E-mail
Written by Randy Post   
Friday, 02 November 2012 06:23

I shared this image in my October newsletter this week, but this was one of the most striking images for me.  Flood waters from the Hudson River pouring into the ground zero excavation. Some 100 temporary pumps in addition to the 30 permanent pumps were being used to dewater the excavation.  If anyone has any updates on the status of the shoring structures after this, please let me know.

WTCSandyFlooding

Last Updated on Friday, 02 November 2012 06:27
 
Italian scientists convicted over earthquake warning PDF Print E-mail
Written by Randy Post   
Tuesday, 23 October 2012 23:24

The Italian village of Onna after an April 7, 2009 earthquake

In a ruling that has rocked the geophysical community, six Italian scientists and one government official have been sentenced to 6 years in prison for failing to give adequate warning of a 2009 earthquake that killed 300 people in L'Aquila.

The seven, all members of a body called the National Commission for the Forecast and Prevention of Major Risks, were accused of negligence and malpractice in evaluating the danger and keeping the central city informed of the risks. The case has drawn condemnation from international bodies including the American Geophysical Union, which said the risk of litigation may deter scientists from advising governments or even working in seismology and seismic risk assessments.

This case is alarming on many levels. Do you think it will have reprecussions on the way seismology and analysis of other geologic hazards will be practiced in the US and other areas outside Italy? Leave a comment or tweet @geoprac. [Source: Reuters. Image: REUTERS/Chris Helgren /Files]

Last Updated on Wednesday, 24 October 2012 06:28
 
180 Miles of California Levees Declared Ineligible for Federal Rebuild Funds PDF Print E-mail
Written by Randy Post   
Wednesday, 17 October 2012 23:31
Levee bank near Stockton, CA during a 2011 levee inspection

The Army Corps of Engineers announced last month that 17 levee systems in central California totaling 180 miles will be inelligible for federal rehabilitation assistance in the event they are damaged in a flood. This includes 40 miles of levees that protect Sacramento with a population of just under half a million. The reasons cited by The Corps included inadequate inspections and lack of detail in new state and local levee maintenance plans. It looks like the Corps is making a big point for levee owners across the country. But maintenance and inspections are difficult while state and local government budgets are shrinking. [Source: ENR: Engineering News Record. Image: ENR]

 
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