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Crux accepts awards at DFI Annual Conference

DFICrux was pleased to accept both the 2014 Outstanding Project Award and the C. William Bermingham Innovation Award at the DFI 39th Annual Conference on Deep Foundations last week in Atlanta, GA.  The Outstanding Project Award was presented for Crux’s foundation work on San Diego Gas & Electric’s Sunrise Powerlink Project, and the Bermingham Innovation Award was presented for the introduction of Crux’s patented steel micropile cap design on the same project.  More detailed information can be found on DFI’s website.

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Sunrise Powerlink: An Innovation in Foundation Design

Sunrise Powerlink Foundations Article Crux’s patented steel cap micropile foundations, implemented on San Diego Gas & Electric’s Sunrise Powerlink Project, were featured as the cover story in the September/October issue of DFI’s Deep Foundations Magazine. Click here to read the article.

Troy Meadows Foundations Featured in T&D World

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Micropile Foundations in Wetland Habitat

PSE&G Traverses New Jersey Wetland

John Ribardo, Public Service Electric & Gas, and Steve Davidow, Crux Subsurface | T&D World Magazine

A steadily increasing demand for power has introduced a number of unique design and construction challenges within the overhead transmission sector, many of them environmental. The routing and siting process for transmission line construction is often extensive and time-consuming, requiring close coordination with numerous regulatory agencies. Although utilities strive to use existing rights-of-way (ROW), and are often successful, extensive alternate route analyses are typically required prior to gaining approval.

Environmental analysis of new routes or multiple routes can add significant time to the permitting process. Once routing and permitting have been approved, utilities and their consultants and contractors are faced with the challenge of constructing the alignment within the limitations set forth in each of the permits.

 
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Crux Foundations Recognized by ISM & DFI

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Sunrise Powerlink

Crux was the recent recipient of three industry awards for design-build foundation work and the introduction of an innovative steel pile cap design on the Sunrise Powerlink Project.  This included the DFI Outstanding Project Award, the C. William Bermingham Innovation Award, and the first-ever World Cup of Micropiles.  All three awards had a different set of criteria and were selected from separate applicant pools.

The project featured 3,732 micropiles installed at 234 of the total 421 lattice tower sites, and was the inaugural use of Crux’s patented steel micropile cap.  All foundation equipment and components were transported by helicopter to accommodate for environmental regulations and rugged, mountainous terrain.  In total, more than 99,000 lineal feet of pile was installed in a condensed ten and a half month construction schedule.  The introduction of the steel pile caps reduced onsite construction time by an average 64%, significantly contributing to the on-time completion of the project.

Click below to read the DFI press release:

World Cup

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Micropile World Cup

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ISM World Cup
Crux’s micropile foundation work on the Sunrise Powerlink Project has been selected as the North American representative for the International Society of Micropile’s Micropile World Cup.  The project will be up against selected projects from South America, Europe and Australia for the Micropile World Cup title at the 12th International Workshop on Micropiles in Krakow, Poland June 11-14.

Sunrise Powerlink Micropiles

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Design begins for California pumped‐storage

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The Sacramento Municipal Utility District (SMUD) has awarded an Owner’s Engineer services contract for preliminary design and construction services on the Iowa Hill pumped storage project to a team led by Jacobs Associates.  As part of the Jacobs team, Crux has completed both vertical and horizontal exploratory borings to depths of up to 1,500 feet and lengths of up to 2,000 feet.  Crux expects to return to the project in the coming year to provide additional drilling and in-situ testing services.

Pumped-storage hydroelectric project

GeoDrilling International Feature

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Crux’s specialty foundation work on the Troy Meadows transmission segment was recently featured in GeoDrilling International’s May 2014 issue.  Click below to view the full article.

GeoDrilling International Feature 

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Crews trying to learn extent of Wanapum Dam crack

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Crews trying to learn extent of Wanapum Dam crack

Crux is providing challenging access exploratory drilling services at the Wanapum Dam in central Washington.  A crack was discovered on February 27, 2014 and the geotechnical exploration program is intended to provide more information regarding the extent of this crack.

Six borings have been completed to-date, and Crux crews expect to drill a minimum of twenty by the conclusion of the project.

Exploration drilling started at proposed dam site

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Crux crews are onsite near Whiteriver, AZ to complete core drilling and sampling at the proposed Miner Flat dam site. Thirteen angled core holes and a total of approximately 3,365 feet of drilling will be completed. Access to borings is being achieved through a combination of track vehicle and helicopter, and core recovery in the area has proven challenging in the past. All operations are taking place on White Mountain Apache Tribe lands and require close coordination with tribal representatives.

Geotechnical Exploration Drilling

If constructed, the dam will cross the north fork of the White River, measuring approximately 160 feet high and with a crest length of approximately 450 feet. The proposed project, including the dam, as well as a storage reservoir, a pumping plant, treatment facilities, and a distribution system, would provide long-term water stability and reliability to the Fort Apache Indian Reservation.

Crux is performing permeability testing throughout drilling operations and Vibrating Wire Piezometers will be installed in eight of the thirteen borings. Downhole imaging will be completed in select borings by Crux Oriented Borehole Logging (COBL). Drilling operations commenced on March 7, 2014 and Crux expects to be onsite until June 2014.  Continue reading →

Company Profile Featured in Piling Canada Magazine

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Piling CanadaA History of Problem Solving 

When Crux first began installing micropiles in 2002, the company was already known for providing difficult-access geotechnical exploration services throughout the western United States for tunnel, dam, highway and slope stabilization projects, including the Hoover Dam Bypass.  Crux initially utilized micropiles for structure foundation support and slope stabilization before adapting the technology as a foundation alternative in the electrical transmission market. Micropiles provide the ability to install a high capacity deep foundation system in remote or environmentally sensitive locations, explained Tunison, Crux’s Vice President of Operations.

“Micropiles are replacement piles constructed using high-strength grout and steel, and can be installed using lightweight equipment,” he explained.

In 2004, Crux began construction on the 57-mile-long Swan Lake-Lake Tyee Intertie between two hydroelectric projects in Southeast Alaska.  This was the first project of its magnitude to use helicopter-supported micropile foundations exclusively for its whole alignment, relying on Crux’s customized drills, skilled helicopter support, and specially trained drillers.

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Technical Papers

Access Crux's archive of geotechnical drilling knowledge & experience.

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Crux Updates

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