Slurry Wall Projects


Slurry Wall Projects

Tuttle Creek Dam Strengthening, Manhattan, KS

Koehring 1466 with special extended arm for slurry wall to 74′ deep.

Queen City Farms – Kent, WA

Hayward Baker selects two machines for remediation project at Boeing site. Koehring 1466 equipped with an Adco 48″ “V” bottom rock bucket excavates for a 68 foot deep slurry wall in extremely hard glacial till. Excavation completes on schedule.

Allied Signal Corporation – Ironton, OH

IT Corporation chooses Dorfman to provide an extended two-piece arm for the Koehring to reach a depth of 90 feet; oversized cylinders are installed to insure hoisting capability.

Peters Creek Lagoon – Clairton, PA

A slurry wall specified to a depth of 78-82 feet; however, machine also required to be able to excavate to 90 feet deep. IT Corporation elects our Koehring 1466 with new fabricated long boom/arm together with the additional attachment – a two-piece arm – for depths to 90 feet. Dorfman provides a special Adco “V” bottom rock bucket to excavate vesicular cindery lava (slag).

Levee Strengthening – Yuba City, CA

This slurry wall excavation on the Sacramento River included the installation of 930,000 square feet to be completed in eight weeks. Dorfman furnishes two Koehring 1166’s with extended boom/arm to meet the depth of 74 feet. Dorfman provides four operators and the machines work two ten-hour shifts, six days a week and trench excavation completes on schedule.

Levee Strengthening – Stovall, MS

Excavation to 95 feet deep. Remedial Construction Services chooses a Koehring 1466 to withstand the rigors of a double shift (seven days a week). Excavation completes within the time allotted by the Corps of Engineers.

Site Development – Southhampton, England

A slurry wall to 92 feet deep for TAG-McLaren World Headquarters under direction of Keller Engineering. A Koehring 1466 transported across the high seas for five months of deep excavation.

Lake Keechelus Dam Strengthening – Eastern Washington

The Koehring 1466 for 81 foot deep trench excavation including removal of boulders for Kiewit-Western.

Albian Sands Expansion – Ft. McMurray, Alberta, Canada

Bauer Foundations utilizes Koehring 1466 long reach excavator for 78 foot deep excavation during 2008 and 2009 seasons.

Potash Corporation – Rocanville, Canada

Remedial Construction Services utilizes two Koehring 1466 long reach excavators for slurry wall construction to 82 feet between 2009 and 2013.

Marine Projects

3-CS Marine 1166 & Shear

Marine Projects

TRRA Merchants Bridge Rehab

For the Walsh Group on the Mississippi at St. Louis, MO using Koehring 1166 with extended boom and arm to 65’ deep for coffer dam excavation (boulders and concrete removals).

Red Rock Hydroelectric Project

Underwater excavation with Koehring 1466 for 70+’ with special oversized 13” hoist cylinders for increased payload. Ames Construction, Pella, IA

Lock and Dam #5, Winona, WI. 

Mississippi River deep excavation and demolition for J. F Brennan Company

Lock and Dam #14, LA Claire, IA

Mississippi River deep excavation and demolition for J. F Brennan Company

El Paso Wharf – San Francisco Bay

CS Marine opts for Koehring long reach excavator with shear for concrete pier removals to 60 foot depth.

Diablo Nuclear Power Plant, Avila Beach, CA

Dorfman provides a custom extended arm for the Koehring long reach excavator to meet a 53 foot depth and a 78 foot reach to repair storm damaged breakwater. Working double shifts, Dorfman operators place rip rap underwater as directed by divers. Contractor/Agency: Healy Tibbitts/Pacific Gas and Electric.

Chollas Creek Dredging – San Diego, CA

A Koehring long reach excavator with specially fabricated lightweight, perforated, five cubic yard sand bucket is used to unload dredged sand from barges. Contractor:  Fluor Corp.

Berth 302 – Port of Los Angeles, CA

Contractor, Fletcher-General-Kiewit, selects the Koehring 1466 with extended two-piece arm for the long reach to remove existing rock protection, stockpile, sort and replace rip rap on a project spanning thirteen months.

Naval Carrier Wharf – San Diego, CA

The Koehring long reach excavator with extended boom/arm prepares the subgrade and places rip rap in connection with channel deepening.

Glen Cove Creek – Long Island, NY

Restricted to one side of canal only, the Koehring long reach excavator, with a reach of 82 feet and 5½ cubic yard bucket, removed contaminated materials.

Crystal Springs Reservoir – San Francisco Water Department

Koehring long reach excavator, on 17 month project, working from barge for deepening and shaping reservoir.  Contractor:  Veolia Environmental Services

Barrier Removal – Costa Azul, Mexico

Three long reach excavators in connection with development of a gas liquefaction terminal for San Diego Gas & Electric during 2006-2008.

Tunnel and Trestle Scour Remediation – Chesapeake, VA

Placing rip rap protection from a barge with Koehring long reach excavator for Skanska USA during 2007-2009.

General Projects

Dorfman Construction General Projects

General Projects

Lassen Park – California

T. L. Petersen utilizes Koehring 1166 long reach excavator to build rock retaining wall for slide stabilization.

Pacific Coast Highway Slide Removal – Malibu, CA

Caltrans emergency contract to assist in stabilization and slide removal operation.

Bridge Pier Demolition – Colorado River

MCM Construction uses Koehring 1466 long reach excavator with hydraulic breaker for underwater demolition and removal of abandoned piers.

San Onofre Nuclear Power Plant – CA

Koehring 1466 long reach excavator with a reach of 98 feet and a hydraulic breaker for demolition of containment wall.