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Monday, 23 November 2015

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Kleinfelder CEO Resigns, Interim CEO Kevin Pottmeyer Takes Reigns as Company Looks to Accelerate 2020 Strategic Direction Initiatives [2015-11-23 13:38:24]  recommend  recommend this post  (23 visits) info

SAN 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 [...]

Terracon Acquires NORCAL, Strengthens West Coast Presence [2015-11-23 13:29:49]  recommend  recommend this post  (25 visits) info

OLATHE, Kan. – Terracon, a leading provider of environmental, facilities, geotechnical, and materials engineering services, is pleased to announce the acquisition of NORCAL Geophysical Consultants, Inc. of Sonoma County, Calif. Terracon is retaining NORCAL’s 11 employees. Founded in 1983, NORCAL offers geophysical technologies in support of geologic, groundwater, environmental, and engineering investigations. NORCAL’s capabilities, including their unique geophysical [...]

Nicholson Completes Emergency Work on Indiana's I-65 [2015-11-23 13:25:30]  recommend  recommend this post  (24 visits) info

PITTSBURGH, PA – Nicholson Construction recently completed emergency repair work to an unstable pier supporting a bridge on INDOT’s Interstate 65. These repairs enabled a 37-mile section of the highway’s northbound lanes to be reopened after a four-week closure. The highway was in the process of being rehabilitated and widened when the pier was damaged by steel piles driven into the water tight ground below it. The pier began to settle and eventually rotated ten inches. [...]

Moretrench President Arthur B. Corwin, P.E. to Receive Moles Member Award [2015-11-18 15:22:46]  recommend  recommend this post  (38 visits) info

Moretrench is very pleased to announce that company President and CEO Arthur B. Corwin, P.E. has been recognized by his fellow Moles with the 2016 Member Award for Outstanding Achievement in Construction, the organization’s top honor. The presentation will take place at the annual awards dinner to be held on January 27, 2016 at the New York Hilton. Mr. Corwin joined specialty geotechnical contractor Moretrench in 1978 and has dedicated his entire career to the growth of the company, [...]

​Tetra Tech to buy Australian Geotechnical Engineering firm Coffey [2015-11-13 07:03:24]  recommend  recommend this post  (24 visits) info

Tetra Tech will buy Australia-based geotechnical engineering firm Coffey Geotechnics for $0.31 per share. The move is expected to strengthen Tetra Tech's presence in Australia. Tetra Tech currently employs 13,000 staff globally, and Coffey a reported 3,300 globally. [Source: Image: Tetra

Bertha Tunneling to Resume 1 Month Later Than Planned [2015-11-13 06:47:58]  recommend  recommend this post  (24 visits) info

The Seattle Tunnel Partners JV announced last month that tunneling on the Alaska Way Viaduct Replacement project will resume a month later than originally planned. The Bertha TBM will resume mining on December 23 after a unique repair operation involving an access shaft. The tunnel boring machine is currently undergoing testing, and a jet grouting operation to tighten up the ground in advance of the TBM was undertaken last month. [Source: More at WSDOT Alaskan Way Viaduct Page. Image: WSDOT [...]

Golder Innovates for Subway Line in Stockholm [2015-11-03 07:31:04]  recommend  recommend this post  (23 visits) info

Golder was the geotechnical designer for two of the most challenging segments of the Stockholm City Line in Sweden. Their work included foundation improvements for a tunnel beneath a historic portion of Stockholm, 3D modeling of rock mass deformations, and development of a specialty software for City officials to monitor the large data sets being gathered for the project, including settlements, ground water levels, vibrations, and more. [Source: Read more about this interesting project from [...]

Movie About Dramatic Drilling and Rescue of 33 Chilean Miners [2015-10-29 09:34:29]  recommend  recommend this post  (13 visits) info

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:

How Could a Pile of Dirt Cause a Major Interstate Bridge To Tilt? [2015-10-20 16:25:15]  recommend  recommend this post  (2 visits) info

[Editor] The Delaware Department of Transportation (DelDOT) had a major problem on their hands after a bridge on I-495 was leaning…one side of the bridge was 18 inches higher than the other.  The culprit?  A pile of fill adjacent to the bridge was loading soft soils beneath.  So what do you do about it?  In this contributed article by Dennis M. O’Shea, bridge engineer in the FHWA Delaware Division Office, he describes the problems faced by DelDOT, the causes, [...]

Protestors Cause Geotechnical Work to Shutdown for Sydney WestConnex Project [2015-10-06 08:34:38]  recommend  recommend this post  (15 visits) info

Police were called out to one geotechnical investigation site in metro Sydney, Australia last week after residents unhappy with the proposed WestConnex project entered the work site. The crew abandoned drilling tools and equipment on the site, an apartment complex. WestConnex geotechnical contractors canceled another planned investigation as well based on the public reaction. Residents of the apartments were notified in advance of the work, and WestConnex indicated that the proper permission [...]

Site Characterization Services: Step 3 Field Exploration [2015-10-06 08:32:19]  recommend  recommend this post  (15 visits) info
Another in the series of excellent videos by Terracon. This video addresses the field exploration techniques they use. [Source: Terracon YouTube Channel. Image:

Terzaghi's Birthday 2015 and Growing Pains of a New Profession [2015-10-02 14:44:44]  recommend  recommend this post  (42 visits) info

Today is the anniversary of Karl Terzaghi's birthday. I have a tradition of marking the anniversary by sharing a quote or some other piece of info I've learned about the man we commonly refer to as the father of soil mechanics and geotechnical engineering. This year I marked the occasion a day early by arranging for geotechnical engineers in my office of Golder Associates to watch a video over our lunch hour by The GBA from 1988 of a presentation given by Ralph Peck entitled "Growing Pains [...]

Dewind Remediates Seepage at Dam in Tyler, Texas [2015-09-24 07:52:53]  recommend  recommend this post  (44 visits) info

Dewind One Pass was involved in constructing a cut-off wall to address seepage issues at Tyler Dam in Tyler, Texas. The earthen dam was constructed of clay, but the foundation soil consisted of a very permeable silty sand material. The remediation involved a mixed-in-place soil, cement, and bentonite cutoff wall on the downstream face of the dam, about halfway between the crest and the toe. Dewind won the job, and the City's consulting geotechnical engineer narrates this video explaining [...]

Moretrench Remediates Dangerous Seepage Problem at Dam in Catskill Mountains [2015-09-24 07:09:59]  recommend  recommend this post  (34 visits) info

Moretrench was contacted by NYCDEP after turbid water was noticed seeping from the toe of their Cannonsville Reservoir Dam, in the Catskill Mountains. The problem was determined to be related to an exploratory borehole conducted for a hydroelectric plant project that intercepted an artesian aquifer in the underlying glacial till. Moretrench first installed a series of wells to dewater the artesian unit using the Sonic drilling method. Once the artesian aquifer was depressurized, the owner [...]

Texas Regulator Clears Oil And Gas Company Of Causing Quakes [2015-09-18 06:54:37]  recommend  recommend this post  (32 visits) info

 Ordovician; US,CA
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 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 [...]

USBR Selects 23 Projects Totaling $5.2 Million to Build Drought Resiliency in Nine States [2015-09-18 06:52:55]  recommend  recommend this post  (29 visits) info

From the USBR Press Release:Bureau of Reclamation Commissioner Estevan López has announced the selection of 23 projects to receive grants totaling $5.2 million for proactive drought planning and other efforts to build long-term drought resiliency in nine states in the West."The western United States has faced an unprecedented drought this year and will face many more water challenges in the future," Commissioner López said. "This funding will help the selected communities prepare for [...]

Site Characterization Services: Step 2 Methods Consulting [2015-09-14 08:01:50]  recommend  recommend this post  (27 visits) info
The second in a series of videos by Terracon on the various steps of site characterization. If you are someone new to geotechnical engineering, these videos are a great overview of what we do! [Source: Terracon YouTube Channel. Image:

GPR Used to Locate Possible 'Superhenge' Near Stonehenge [2015-09-14 08:01:04]  recommend  recommend this post  (30 visits) info

Archaeologists using high-resolution ground penetrating radar (GPR) have located a massive collection of stones less than 3 km from the well-known Stonehenge site. This grouping of 90 stones, up to 4.5 meters tall (14.7 feet) have apparently been pushed over and buried. Renderings of the site have been created showing what the row of stones would have looked like. The exact purpose and how this site relates to Stonehenge is still a mystery. [Source: Read the source article at CNN. Image: [...]

Final three pieces of tunneling machine safely in the access pit [2015-09-14 08:00:31]  recommend  recommend this post  (27 visits) info

The repaired cutterhead has been in the pit several weeks now, and the final three pieces of shielding for the Bertha TBM have been lowered into the access pit. Seattle Tunnel Partners team members will complete the reassembly of the machine, and manufacturer Hitachi Zosen will conduct a series of tests to make sure the TBM is fit to resume tunneling. The most recent STP schedule indicates they expect to resume tunnel boring in the later part of November. [Source: Alaskan Way Viaduct WSDOT. [...]

Tunneling machine's front end bolted in place [2015-08-31 08:25:12]  recommend  recommend this post  (34 visits) info

The troubled Alaska Way Viaduct Replacement Tunnel TBM known as Bertha has reached a milestone in its repair. The front cutterhead has been repaired, and has been lowered back into the access shaft to be re-attached to the TBM. The time-lapse video below shows the cutterhead being lowered down into the access shaft. What caught my eye was the number of steel cables on the crane blocks...that's a heavy lift! Time Lapse Video [Source: WSDOT Alaskan Way Viaduct Project Page. Image: | Impressum