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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
More Trouble for Bertha TBM, Sinkhole, Tunneling Suspended PDF Print E-mail
Written by Randy Post   
Friday, 22 January 2016 01:30

Sinkhole (now filled with concrete) caused by ground loss during Bertha Tunneling

The Bertha TBM creating the Alaska Way Viaduct Replacement Tunnel and the Seattle Tunnel Partners JV just can't seem to catch a break. After being stopped for nearly 2 years to replace the entire cutterhead and make other repairs, Bertha finally began tunneling again just before Christmas on December 23. The machine had tunneled about 100 feet as of January 13 when there was a problem with a barge that was transporting excavated material from the tunneling. It began listing from an uneven load, was released from it's moorings to avoid damaging the conveyor system, and spilled (supposedly uncontaminated) soil in Elliot Bay. The barge then impacted two piers, it didn't sound like the damage was significant.

Just a few hours after the barge incident, a sinkhole opened up in between the repair pit and the TBM location. On January 14, WSDOT notified Seattle Tunnel Partners that the tunneling was suspended "for cause" pending a safety review. Even the governor of Washington weighed in on the issue. The sinkhole has been filled with concrete now. The concern by critics is the obvious question of what will happen if there is ground loss like this under the viaduct, or underneath downtown Seattle. If you recall, the project included jet grouting beneath the viaduct, so that should help reduce the risk there, and STP has said that once Bertha dives deeper, the risk of sinkholes will reduce. It sounds like the long hiatus had cause them to be a little complacent about the monitoring of the material coming from tunneling. Normally there is a very careful accounting of all the material that is excavated to predict when there is a ground loss risk. I don't think that will happen again! [Source: Read or watch the Washington Governor rail on the tunneling safety. Image: Seattle PI]

Last Updated on Friday, 22 January 2016 08:39
GBA Issues New Report-Review Guide PDF Print E-mail
Written by Randy Post   
Wednesday, 13 January 2016 23:03
GBA Guide to the In-House Review of Geoprofessional Reports

The Geoprofessional Business Association has released a new guide document on the In-House Review of Geoprofessional Reports. The document has information for report writers and reviewers with a 'focus on a report’s ability to satisfy the contractual obligations it was intended to fulfill; the quality of its technical and risk-management content; and the clarity of presentation.' Read more at the link below. As with most GBA documents, it is free for GBA member firms. [Source: Geoprofessional Business Association. Image: GBA]

Notable Geotechnical Engineers Among 2016 ASCE OPAL Award Recipients PDF Print E-mail
Written by Randy Post   
Wednesday, 13 January 2016 22:51
Opal Award Trophy

There are two notable geotechnical engineers among the recipients of the 2016 ASCE Opal Outstanding Projects and Leaders awards. Rudolph Bonaparte, Ph.D., P.E., D.GE, F.ASCE, NAE, the president and CEO of Geosyntec, will receive the award for design. Jerry A. DiMaggio, P.E., D.GE, M.ASCE, will receive the award for government for his many years of service as the FHWA's lead geotechnical engineer. [Source: Read more about the award and bios for the recipients at the ASCE Roundup Blog. Image: ASCE Roundup]

High altitude foundation construction with Crux PDF Print E-mail
Written by Randy Post   
Tuesday, 12 January 2016 05:57

Crux Subsurface rig setup for the Rhinedollar Distribution Project in the Inyo National Forrest

This is an awesome limited access foundation project from Crux Subsurface! They designed and installed micropile foundations for new steel tubular towers to replace old steel latice structures. The high altitude (about 10,000 feet) meant limited construction season window, and challenges with the size of helicopter needed for loads. They also provided an innovative steel cap design to the micropiles, thereby avoiding the need to bring in additional concrete and rebar for a traditional micropile cap. Check out the excellent video below. [Source: Read more about the project at Crux Subsurface. Image: Crux]

Crux Rhinedollar Project Video

Rhinedollar Job Story 2015 from Crux Subsurface, Inc. on Vimeo.

Last Updated on Tuesday, 12 January 2016 13:01
Recorded Webinar - Geotechnical Aspects of Polyurethane Grouting PDF Print E-mail
Written by Randy Post   
Sunday, 20 December 2015 11:53

I gave a presentation recently on a monthly webinar for URETEK Holdings, one of the licensed affiliates (installers) of products by GeoPrac sponsor, URETEK ICR. The topic was Geotechnial Aspects of Polyurethane Grouting. I gave my perspective on some of the benefits of polyurethane grouting, the challenges in geotechnical characterization of the improvements to the soil after grouting, and some unique applications of the technology people are currently using and could potentially use in the future. If you have time to check it out, let me know your thoughts!

[Source: URETEK Holdings YouTube Channel. Image: YouTube]

Last Updated on Monday, 21 December 2015 04:17
Ground Freezing Goes Mainstream with Popular Mechanics PDF Print E-mail
Written by Randy Post   
Sunday, 20 December 2015 11:52

Moretrnch ground freezing technology at the Washington D.C. First Street Tunnels Project

GeoPrac sponsor Moretrench is a specialty geotechnical contractor known for their expertise with a variety of geotechnical construction methods. But they are probably best known for their niche work with ground freezing technology. Popular Mechanics Magazine recently did a story on Moretrench's ground freezing work at the Washington D.C. First Street Tunnels project. The ground freezing allowed three vertical access shafts and four deep adits to be excavated in the dry using the frozen ground support. [Source: Read more abot this interesting technology and project from Moretrench. Image: Moretrench]

Last Updated on Monday, 21 December 2015 04:16
2015 Terzaghi Lecture - The Evolution of Specialty Geotechnical Construction Techniques PDF Print E-mail
Written by Randy Post   
Sunday, 20 December 2015 11:52

The 2015 Karl Terzaghi award was presented by Donald A. Bruce, Ph.D., D.GE, C.Eng., L.G., L.E.G., President, Geosystems, L.P. at the Geo-Institute's 2015 Geo-Congress Conference. The Geo-Institute has generously made his lecture available to all of us on their YouTube Channel, so be sure and subscribe. From his abstract:

In historic literature, there is the "Great Man" theory, whereby history is reflected in the biographies of preeminent characters. In the more theoretical and academic branches of specialty geotechnical engineering, the theory holds true, with, of course, Professor Terzaghi one of the heroic great men – a researcher, problem solver, and inspiration sans pareil. In contrast, in the branch of specialty geotechnical construction, technological advances occur principally through "Great Leaps" as opposed to steady and progressive evolution.

Six criteria must be satisfied in support of awarding "Great Leap" status, beginning with a project-specific challenge of unprecedented scope or complexity, and ending with a legacy document detailing and codifying the leap. These steps are illustrated by reference to developments in drilling and grouting; cutoffs for dams; deep mixing; and micropiles, all techniques in which the author has been intimately involved throughout his professional career as a researcher, contractor, educator, and consultant.

 [Source: Geo-Institute YouTube Channel (be sure to subscribe!). Image: YouTube]


Last Updated on Monday, 21 December 2015 04:14
Top 50 Posts of 2015 PDF Print E-mail
Written by Randy Post   
Sunday, 20 December 2015 07:04

Here are the top 50 GeoPrac content items of the year based on your clicks.  They are sorted by hits/day to not bias the items published towards the beginning of the year. Thanks to all of my visitors for spending some of your valuable time getting your news from GeoPrac. I know everyone is busy, so I appreciate it very much!

  1. Kleinfelder CEO Resigns, Interim CEO Kevin Pottmeyer Takes Reigns as Company Looks to Accelerate 2020 Strategic Direction Initiatives - Published Nov 23, 2015 (52.3 hits/day, 1,401 page impressions total)
  2. Free Webinar–Geotechnical Aspects of Polyurethane Grout - Published Dec 8, 2015 (43.5 hits/day, 498 page impressions total)
  3. LogitEasy Offers Free iPad Promotion for Borehole Logging - Published Dec 7, 2015 (38.4 hits/day, 490 page impressions total)
  4. A Whole Lotta Shakin' Goin' On: Center for Geotechnical Modeling Facilitates Seismic Research - Published Aug 18, 2015 (31.6 hits/day, 3,917 page impressions total)
  5. How Could a Pile of Dirt Cause a Major Interstate Bridge To Tilt? - Published Oct 20, 2015 (29.2 hits/day, 1,777 page impressions total)
  6. Nicholson Completes Emergency Work on Indiana's I-65 - Published Nov 23, 2015 (26.1 hits/day, 701 page impressions total)
  7. Terracon Acquires NORCAL, Strengthens West Coast Presence - Published Nov 23, 2015 (25.0 hits/day, 671 page impressions total)
  8. Moretrench President Arthur B. Corwin, P.E. to Receive Moles Member Award - Published Nov 18, 2015 (24.4 hits/day, 775 page impressions total)
  9. Protestors Cause Geotechnical Work to Shutdown for Sydney WestConnex Project - Published Oct 6, 2015 (23.7 hits/day, 1,781 page impressions total)
  10. Moretrench Remediates Dangerous Seepage Problem at Dam in Catskill Mountains - Published Sep 24, 2015 (23.3 hits/day, 2,028 page impressions total)
  11. USBR Selects 23 Projects Totaling $5.2 Million to Build Drought Resiliency in Nine States - Published Sep 18, 2015 (22.9 hits/day, 2,133 page impressions total)
  12. Tetra Tech to buy Australian Geotechnical Engineering firm Coffey - Published Nov 13, 2015 (22.7 hits/day, 840 page impressions total)
  13. Video of DeWind One Pass Trenching MT2000 Trencher Installing Soil Bentonite Cutoff Wall - Published Aug 4, 2015 (22.1 hits/day, 3,053 page impressions total)
  14. Geocomp to Provide Engineering Services for Fukushima Ice Wall - Published Jul 27, 2015 (22.1 hits/day, 3,228 page impressions total)
  15. The World's Longest (and Scariest) Glass Pedestrian Bridge - Published Jul 31, 2015 (21.8 hits/day, 3,097 page impressions total)

Click through for the rest of the list!

Last Updated on Monday, 21 December 2015 04:15
Catch-Up-Post for End of 2015 PDF Print E-mail
Written by Randy Post   
Sunday, 20 December 2015 06:01

You know how it feels good to clean off your desk and have a fresh start? I've collected a number of articles over the past 6 months that I didn't get a chance to blog about. As we move rapidly towards 2016, I wanted to start with a clean slate.  There are certainly some gems in here! Hopefully you have some time off over the holidays, and maybe you check this list twice with a drink in hand!

Last Updated on Sunday, 20 December 2015 07:04
Free Webinar–Geotechnical Aspects of Polyurethane Grout PDF Print E-mail
Written by Randy Post   
Tuesday, 08 December 2015 14:06

URETEK Deep Injection™ ProcessI’m pleased to announce that I will be a guest speaker at the monthly webinar of URETEK Holdings, an affiliate of GeoPrac sponsor URETEK ICR.  I will be presenting on Geotechnical Aspects of Polyurethane Grout, representing Golder Associates Inc., my day-job employer.  The webinar is free and open to anyone interested until the spots fill up.

The presentation will be on Friday, December 11, 2015 from 11am – 12pm ESTPlease be sure to register for this webinar before it fills up. I hope that what I discuss will be useful to owners and engineers who are considering using or specifying URETEK products on their project.  Thanks!

Image Credit – URETEK ICR

Last Updated on Tuesday, 08 December 2015 14:09
LogitEasy Offers Free iPad Promotion for Borehole Logging PDF Print E-mail
Written by Randy Post   
Monday, 07 December 2015 06:39

LogitEasy offers mobile geotechnical data collection and log preparation servicesLogitEasy provides a web-based solution for logging boreholes and wells.  You can send them scanned paper logs, or use their electronic form on a PC or iPad to submit the data to them.  For a flat fee per log, they will prepare electronic logs in gINT, LogPlot, or EnviroInsite (well log) formats and submit report-ready PDF logs and/or electronic data files.  They are currently offering a promotion through the end of 2015.  When you pre-purchase 99 logs, you get an iPad Air 2, a LifeProof rugged case, a mobile internet SIM kit, and a $100 mobile internet card.

Head over to and click on the banner at the top of the page for more info on the free iPad promotion.   The things I like about their approach to mobile geotechnical data collection is that you can build in the pricing into your project costs, and their solution works offline as well as online, so you can still log on the iPad at those remote project sites.

LogitEasy Fall/Winter Promotion - Free iPad for Borehole Logging

Last Updated on Monday, 07 December 2015 06:43
Kleinfelder CEO Resigns, Interim CEO Kevin Pottmeyer Takes Reigns as Company Looks to Accelerate 2020 Strategic Direction Initiatives PDF Print E-mail
Written by Randy Post   
Monday, 23 November 2015 05:38

Kevin Pottmeyer, new interim CEO of KleinfelderSAN DIEGO, California – Kleinfelder announced that President and Chief Executive Officer Bill Siegel has resigned, effective immediately, to pursue other interests. The Board of Directors has appointed Kevin Pottmeyer as interim CEO while the Board of Director’s conducts a search for a new Chief Executive Officer.

“Bill has accomplished a great deal for our company in his time with us,” says Rodger Johnson chair of Kleinfelder’s Board of Directors. “We thank him for his commitment, service and leadership.”

Siegel adds, “I’m proud of the progress we’ve made in the last 7 years to transform our business. We are at a point in the lifecycle of the company to take our business to the next level and deliver on our 2020 objectives. I greatly value the relationships and experiences realized over my nearly 30 years with the firm and look forward to applying this experience to the next chapters in my professional career and life.”

In the interim, Kevin Pottmeyer, Senior Vice President and Chief Strategy Officer, will lead the company during the transition. Pottmeyer says, “We are financially strong and leading the engineering consulting market in many areas of our business. As we work through this transition, I will continue our focus on meeting current year goals, work with the executive team to prepare our FY17 plan and help lead the search committee for our next Kleinfelder CEO. We will begin immediately to identify CEO candidates and expects to hire a new leader as soon as practically possible.

[Editor] Click through for more about Kleinfelder [/Editor]

Last Updated on Monday, 23 November 2015 05:42
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