New York City 46th Street Vent Plant

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46th St. Jet

Given the presence of dense, bouldery glacial till from approximately 20-30 feet below ground surface,  permeation grouting was selected for groundwater control to bedrock beneath Posillico’s structural secant pile excavation support  for the new 46th Street Vent Plant in New York City.  Jet grouting was also used to close gaps around a water main that traversed the excavation.  Read about this challenging project, published in this month’s issue of  ADSC’s Foundation Drilling magazine, here. 42017 Moretrench_Posillico

You can read more about Moretrench’s Grouting and Groundwater Control Services here.


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The Metropolitan Section of the Geo-Institute/ASCE will host

“Geotechnical Engineering: Adapting to the Unknown”


Thursday May 11th, 2017

Hotel Pennsylvania

401 7th Avenue @ 33rd Street

New York, NY 10001

This 1-day seminar is packed with informative presentations on local area projects including

“Highly Loaded Tensile Elements Installed Many Floors Beneath 390 Madison Avenue”

by Moretrench Senior Engineer Michael McNicholas.

This paper discusses the technical and logistics challenges of foundation installation for retrofit of an existing building that included the addition of several new floors.

Q/A sessions, networking opportunities, exhibits, and Professional Development hours round out the day.  For the full program and registration details, see the event flyer.

Colorado School of Mines Annual Underground Grouting and Ground Improvement Short Course

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Moretrench, Colorado School of Mines, Annual Short Course

This premier 5-day short course covers grouting methods; ground freezing for shafts, tunnels and cross passages; and construction dewatering systems. More than 35 presentations are scheduled covering engineering, equipment, materials and methods, plus off-campus field and on-campus laboratory demonstrations, all by internationally recognized industry experts, makes this a must-attend event for owners, designers, contractors, consultants and suppliers. Take advantage of the many networking opportunities and earn while you learn, with course completion offering 3.5 CEUs.

Moretrench is a regular participant at the event, with three presentations being made this year:

Registration is now open. For full information, visit here.

Moretrench’s Jon Bennett to Present at the ADSC Mid-Atlantic Chapter Drilled Shaft Seminar

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The ADSC mid-Atlantic chapter of the International Association of Foundation Drilling (ADSC) will host a drilled shaft seminar on April 27th, 2017 at the Turf Valley Resort, Ellicott City, MD.

Engineers, contractors, inspectors and anyone interested in the advancement of deep foundations in the mid-Atlantic region will benefit from informative presentations by experts in the field, including Moretrench’s Jon Bennett, P.E.   Plan to arrive the day before and enjoy a morning round of golf and an evening welcome reception.

For registration details and more information, go to

ASCE Hudson Valley Branch Meeting to feature Moretrench Rapid Response Project

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Old Croton B

Moretrench’s emergency response capability is second to none, and this was evidenced when the historic Old Croton Aqueduct in Yonkers, NY, was compromised by a significant landslide when a portion of the  original retaining wall failed.  Moretrench’s Michael Fattorusso and McLaren Engineering’s Thomas Broderick will present an interesting and informative case study on the challenges of installing a replacement retention system at the:

ASCE Lower Hudson Valley Branch Meeting

Wednesday, April 12th

Manhattan College

Bronx, NY

See the event flyer  [ ] and contact Vic Loiola at  to register. Lecture attendees will earn 1 PHD.

2017 Ash Dewatering Workshop at EUCI

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Handling coal ash management and storage procedures in order to keep facilities in compliance with current regulations, as well as adapting to future regulatory changes, is a hot topic in the Coal Combustion Residuals (CCR) community.   Moretrench is in the forefront in assisting power companies with closure challenges through the engineered design and installation of pre-drainage systems. These systems have proven to expedite excavation or capping of CCR materials and enhance the safety of the excavation or grading and capping processes.

The recent EUCI Coal Combustion Residuals Conference, held in Atlanta, GA, from March 30-31, showcased the issues facing the power industry and steps currently being taken.  A half-day pre-conference workshop led by Moretrench Senior Vice President Paul Schmall and Chief Dewatering Engineer Greg Landry discussed the behavior and responsiveness of ash to drainage methods, the wide range of techniques that can be used, associated water treatment methods, the geotechnical investigations necessary, geotechnical verification and monitoring, and new advances in the technologies.  Paul Schmall was also a member of the Closure Services Contracting Panel which engaged in a discussion of “best fit” contracting practices.

“It was an excellent show.  A recurring theme was the need for early dewatering.  This was driven home by Anita Perry with Southern Company Services who also spoke to the need for in-situ ash monitoring.  The concepts are sinking in!”     – Paul Schmall

Click here for more information on Moretrench’s CCR capabilities.


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Go early and catch the atmosphere of the Derby on May 6th before attending the World of Coal Ash conference!

Lexington Convention Center & Hyatt Hotel | May 8-11 | Lexington, Kentucky

The Annual World of Coal Ash conference is a premier event covering all aspects of coal combustible product and storage and this year will feature more than 160 oral presentations and 60 poster sessions.

Mark your event calendar for the following oral and poster presentations by Senior Vice President & Chief Engineer Paul Schmall & Chief Dewatering Engineer Greg Landry:

  • Recent Experience in In Situ Dewatering of Coal Combustible Residuals
  • High Capacity Fly Ash Wellscreen

Visit for conference details.

Moretrench Safety Director Greg Lewis Appointed to new NCCCO Task Force

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Moretrench congratulates Corporate Safety Director Greg  Lewis on being appointed to the National Commission for the Certification of Crane Operators’ (NCCCO) Foundation Drill Rig Operator Task Force.  The newly created task force is a logical extension of the well-established certification process for crane and pile driver operators, riggers and signal-persons.  Its purpose is to create a nationally recognized certification program specifically for drill rig operators that will be an effective tool in assisting companies to manage the risks involved in the use of foundation drill rigs.

“As of now, there is no certification for foundation drilling,” noted Lewis.  “This is a process I’ve been intimately involved with for the past five years that will further advance the safety of our industry and I am looking forward to seeing it through to completion .“

New Freeze Plant soon to join Moretrench’s Ground Freezing Fleet

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The new freeze plant under assembly.

The new freeze plant under assembly.

Introduced in the early 1970s, mobile freeze plants radically widened the scope of jobs that could be accomplished by ground freezing and allowed this technology to be used in tight, urban environments for the first time.  Moretrench has been in the forefront of North America’s ground freezing field for more than 30 years.  As the call for this technique on complex underground projects continues to increase, we expand our capability accordingly to meet demand across a growing demographic area.

Our ground freezing division is getting ready to take delivery of a new plant, the third to be built for us by Toronto-based Cimco (Canadian Ice Machine Company).  The fully enclosed plants are built on 53-ft long galvanized trailers to resist brine corrosion and house the compressor, heat exchanger, condenser and all other components required to do the job.  Ammonia is the refrigerant used in the closed loop plant that chills the brine that circulates through the installed freeze pipes to freeze the ground.

We’ve mobilized our plants for work from Washington D.C to Seattle, north to Canada, and as far south as Buenos Aries, Argentina.   To learn more about our ground freezing projects, see our Services section.

Vancouver’s Port Mann Tunnel Finally Goes into Service with Help from Moretrench’s Ground Freezing Expertise

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Port Mann, Fraser River, Moretrench, Canada

“What they did was really quite unique” City of North Vancouver Mayor Darrell Mussato.

As reported by the Vancouver Sun, Metro Vancouver’s new 3,280-ft long Port Mann Mater main finally went into service in late February after long delays resulting from a mid-bore breakdown of the TBM deep below the riverbed. With all other possible approaches ultimately ruled out due to environmental issues, Moretrench was called in to develop a ground freezing plan to isolate the cutter head from the high surrounding earth and hydrostatic pressures and allow access to the chamber behind the cutter head for repairs.  After just 12 days of freezing, the repairs were able to able to take place and tunneling resumed.

Read the Sun’s news write-up here and see a full description of Moretrench’s work here.