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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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Tuesday, 26 January 2016

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Historic Pennsylvania Tunnel Reopens with Help From NCFI’s TerraThane Polyurethane Foam 

GeoPrac.net [2016-01-26 22:18:14]  recommend  recommend this post  (27 visits) info

 US
MOUNT AIRY, NC—A $2 million tunnel construction project on the Great Alleghany Passage (GAP) is reopened to the public with help from a geotechnical polyurethane foam called TerraThane, by US company, NCFI Polyurethanes. The GAP rail-trail is 150 miles of hiking and biking between Cumberland, Md, and Pittsburgh, Pa. created along the former railway line. In Cumberland, the GAP joins the C&O Canal Towpath, creating a continuous 335-mile long trail experience all the way to Washington, [...]

Photos: Inside The MTA's East Side Access Tunnel 

GeoPrac.net [2016-01-26 16:10:07]  recommend  recommend this post  (17 visits) info

 US,CA
The New York MTA's East Side Access Tunnel Project is what I would refer to as a 'Mega Project'. Any time you're in the Billions of dollars range, I'd say that qualifies, and this one sits at $10.2 Billion! When completed, this project will at long last bring Long Island Rail Road trains to Grand Central Terminal. The photos by The Gothamist are worth spending a few minutes looking at. [Source: Check out the Photos at The Gothamist via @GannettFleming. Image: Jake Dobkin /

Site Characterization Services: Step 4 Laboratory Testing 

GeoPrac.net [2016-01-26 15:26:30]  recommend  recommend this post  (16 visits) info
This video in Terracon's video sequence on site characterization discusses lab testing. [Source: Terracon YouTube Channel. Image:

More Trouble for Bertha TBM, Sinkhole, Tunneling Suspended 

GeoPrac.net [2016-01-22 09:30:02]  recommend  recommend this post  (24 visits) info

 US
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 [...]

GBA Issues New Report-Review Guide 

GeoPrac.net [2016-01-14 07:03:06]  recommend  recommend this post  (22 visits) info
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: [...]

Notable Geotechnical Engineers Among 2016 ASCE OPAL Award Recipients 

GeoPrac.net [2016-01-14 06:51:44]  recommend  recommend this post  (18 visits) info
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: [...]

High altitude foundation construction with Crux 

GeoPrac.net [2016-01-12 13:57:10]  recommend  recommend this post  (20 visits) info
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 [...]

Recorded Webinar - Geotechnical Aspects of Polyurethane Grouting 

GeoPrac.net [2015-12-20 19:53:32]  recommend  recommend this post  (16 visits) info
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 [...]

Ground Freezing Goes Mainstream with Popular Mechanics 

GeoPrac.net [2015-12-20 19:52:52]  recommend  recommend this post  (20 visits) info
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 [...]

2015 Terzaghi Lecture - The Evolution of Specialty Geotechnical Construction Techniques 

GeoPrac.net [2015-12-20 19:52:01]  recommend  recommend this post  (19 visits) info
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 [...]

Top 50 GeoPrac.net Posts of 2015 

GeoPrac.net [2015-12-20 15:04:35]  recommend  recommend this post  (19 visits) info

 AU,JP,US
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! Kleinfelder CEO Resigns, Interim CEO Kevin Pottmeyer Takes Reigns as Company Looks to Accelerate 2020 Strategic Direction Initiatives - Published Nov 23, [...]

Catch-Up-Post for End of 2015 

GeoPrac.net [2015-12-20 14:01:34]  recommend  recommend this post  (44 visits) info

 US,IN
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! Update on Settlement Issue at Alaskan Way Viaduct Replacement Tunnel Project - [...]

Free Webinar–Geotechnical Aspects of Polyurethane Grout 

GeoPrac.net [2015-12-08 22:06:09]  recommend  recommend this post  (42 visits) info
I’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 EST.  Please be sure to register for this webinar [...]

LogitEasy Offers Free iPad Promotion for Borehole Logging 

GeoPrac.net [2015-12-07 14:39:27]  recommend  recommend this post  (34 visits) info

 BE
LogitEasy 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 [...]

Kleinfelder CEO Resigns, Interim CEO Kevin Pottmeyer Takes Reigns as Company Looks to Accelerate 2020 Strategic Direction Initiatives 

GeoPrac.net [2015-11-23 13:38:24]  recommend  recommend this post  (36 visits) info

 US
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 

GeoPrac.net [2015-11-23 13:29:49]  recommend  recommend this post  (37 visits) info

 US
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 

GeoPrac.net [2015-11-23 13:25:30]  recommend  recommend this post  (41 visits) info

 US
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 

GeoPrac.net [2015-11-18 15:22:46]  recommend  recommend this post  (49 visits) info

 US
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 

GeoPrac.net [2015-11-13 07:03:24]  recommend  recommend this post  (25 visits) info

 AU
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: Bizjournals.com. Image: Tetra

Bertha Tunneling to Resume 1 Month Later Than Planned 

GeoPrac.net [2015-11-13 06:47:58]  recommend  recommend this post  (27 visits) info

 US,IN
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 [...]
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