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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
A Whole Lotta Shakin' Goin' On: Center for Geotechnical Mode
Randy, While the UC Davis lab is impressive I believe the USACE Centrifuge
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Today (October 14th) is Geoprofessionals' Day in Seattle PDF Print E-mail
Written by Randy Post   
Thursday, 13 October 2016 22:29
Seattle Mayor names October 14 as Geoprofessional's Day

In honor of the GBA holding their Fall Meeting in Seattle, the City's mayor, Edward B. Murray, has named October 14th Geoprofessionals' Day. Pretty cool! [Source: The Geoprofessional Business Association (GBA). Image: GBA]

 
Ohio DOT Retaining Wall Approval Process PDF Print E-mail
Written by Randy Post   
Thursday, 13 October 2016 22:27
Example of a pre-fabricated retaining wall system that would need approval to be used by Ohio DOT

The Ohio DOT Division of Engineering, Office of Geotechnical Engineering, has a new procedure for pre-approval of prefabricated retaining wall systems (PWRS). In an announcement from back in April, they indicate that all wall system vendors will need to provide a detailed submittal for review and approval by ODOT. Those systems that are successful at getting on the approved products list will have to re-apply every 5 years. And all of the existing systems on the list that were approved prior to April will need to re-submit for approval since their status on the list will expire at the end of 2016. [Source: Ohio DOT OGE. Image: Redi-Rock International]

 
San Francisco Millennium Tower Has Settled 16 Inches PDF Print E-mail
Written by Randy Post   
Thursday, 04 August 2016 06:06

Millenium Tower in San Francisco, image - MLSThe residential high-rise Millennium Tower in San Francisco has settled a total of 16 inches since opening, 2 inches deferentially.  A spokesman for the tower owner blames the settlement on the excavation next door for the Transbay Transit Center, a  $2.4 billion dollar project being constructed 60 feet underground.

However, the Transbay Joint Powers Authority (Transbay) hired geotechnical firm Arup in 2010.  Their initial report indicated that the tower had already settled 10 inches by the time excavation began for the Transit center.  Arup seems to have been tasked with design, installation, and perhaps monitoring of a geotechnical monitoring program, some information on the scope is available in a 2012 presentation given by Arup available on the Transbay website.

[Editor] Click through for the rest of this post. [/Editor]

 
GeoNews Collection for July 21, 2016 PDF Print E-mail
Written by Randy Post   
Thursday, 21 July 2016 06:09

Here's a catch-up-post with a list of articles I didn't get a chance to blog about. Enjoy!

 
Video: DeWind One-Pass MGP Remediation Project PDF Print E-mail
Written by Randy Post   
Wednesday, 20 July 2016 23:38

This is a cool time-lapse video of a DeWind one-pass trencher installing 350 linear feet of 25' foot deep Groundwater Collection (HDPE slotted 4" pipe backfilled to grade with pea stone) in a single pass under the water table in a single pass. Their method and technology did not require any dewatering, shoring, or open excavations. [Source: YouTube via Read more about this interesting technology and company at DeWind's website. Image: YouTube]

 
New Poll on Rockfall Funding in Colorado PDF Print E-mail
Written by Randy Post   
Wednesday, 29 June 2016 23:41
February 2016 Rockfall along I-70 in Glenwood Canyon, Colorado

Roads and Bridges magazine has a new poll out regarding rockfall mitigation funding for the Colorado DOT. According to the magazine, limited funds are forcing the agency to prioritize and be creative when tending to these hazards. The poll asks if there should be dedicated funds for rockfall mitigation? What do you think? [Source: Please visit Roads and Bridges website and look for the poll on the right-hand side to voice your opinion. Image: Aspen Times]

 
Keynetix' Roger Chandler delivers Sowers Symposium State of the Practice Lecture PDF Print E-mail
Written by Randy Post   
Tuesday, 14 June 2016 00:03
Roger Chandler of Keynetix delivering the State of the Practice Lecture at the 2016 Sowers Symposium at Georgia Tech

Roger Chandler of Keynetix was the State of the Practice lecturer at this year's Sowers Symposium at Georgia Tech to commemorate the life of George F. Sowers. Roger's lecture was titled 'Transforming Geotechnical Data' discussed the way different countries value geotechnical data. Keynetix is a sponsor of GeoPrac.net. [Source: Read more about the evening on the Keynetix website. Image: Keynetix]

 
Catch Up Post – April 12, 2016 PDF Print E-mail
Written by Randy Post   
Wednesday, 30 March 2016 06:14

Time to clear the queue a bit. Enjoy these gems!

Last Updated on Monday, 11 April 2016 23:00
 
Movie About Dramatic Drilling and Rescue of 33 Chilean Miners PDF Print E-mail
Written by Randy Post   
Thursday, 29 October 2015 01:34

This is pretty cool! It's not every day that you have a major Hollywood motion picture that features drillers as the unlikely heroes! The movie 'The 33" stars some big names like Antonio Banderas, Lou Diamond Phillips, and James Brolin as the driller extraordinaire, Jeff Hart. If you missed this story, check out the GeoPrac article I wrote about the Drillers, Rigs, Rock and Hart of the Chile Mine Rescue. [Source: YouTube. Image: YouTube]

Last Updated on Thursday, 29 October 2015 08:36
 
Texas Regulator Clears Oil And Gas Company Of Causing Quakes PDF Print E-mail
Written by Randy Post   
Thursday, 17 September 2015 21:54
Hydraulic fracturing (fracking) wastewater injection well

The Texas Railroad Commission issued preliminary findings saying that the hydraulic fracturing wastewater injection well operated by an Exxon Mobil subsidiary was not to blame for earthquakes that shook Reno, Texas in 2013 and 2014. From the Manufacturing.net article:

Commission investigators concluded that a well where Exxon Mobil subsidiary XTO Energy pumps millions of gallons of the wastewater likely didn't cause the quakes, but also said there wasn't enough evidence to demonstrate the earthquakes were naturally occurring. Parties have 15 days to respond.
[Source: Manufacturing.net via AEG Insider. Image: Larry MacDougal/Canadian Press via AP Images via Manufacturing.net]

 
Keynetix and BGS to develop BIM for the subsurface PDF Print E-mail
Written by Randy Post   
Tuesday, 09 June 2015 16:01

GeoPrac sponsor Keynetix has announced some exciting news, a collaboration with the British Geotechnical Survey (BGS) on a research project to develop BIM models for geotechnical and geological data. Watch the video below, or read more in the Keynetix Press Release! [Source: Keynetix]

Last Updated on Tuesday, 09 June 2015 23:08
 
GeoPrac Newsletter 051 PDF Print E-mail
Written by Randy Post   
Friday, 07 November 2014 05:07

The 51st edition of the GeoPrac.net newsletter was published this week. Content includes:

  • Let's do better as mentors
  • Hayward Baker Atlanta Stadium
  • Chuck Ladd In Memoriam
  • Port of Oakland Soil Stabilization
  • Most Popular GeoPrac Content
  • Underwater Landslide in 2011 Tsunami
  • Lidar Applications in Landslides

Check it out if you missed it, and be sure to subscribe to future newsletters!

Last Updated on Friday, 07 November 2014 05:25
 
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