Under The Pond

By Jeff Griffin, Senior Editor | March 2013, Vol. 68 No. 3

The JT8020 drill unit is powered by a 275-horsepower liquid-cooled diesel engine. In addition to 80,000 pounds of pullback force, the machine develops 10,000 foot pounds of torque and spindle speeds to 210 rpm. For its power, the machine is relatively compact in size, and its rubber tracks enable it to travel over various surfaces, including paving, landscaped areas and rough terrain.

Tracking from the boat was done with a Ditch Witch 752 electronic guidance system. Fluid was pumped by a truck-mounted Ditch Witch FM50 fluid system. Mud from the slurry pits was removed with a Ditch Witch FX60 vacuum excavator and a commercial vacuum supplied by the Ted Berry Co.

The water line was laid in late October 2012. The original project is completed as designed and ahead of schedule, but additional work requested by the Town of Naples and Maine Department of Transportation continues. Additions include a half mile of roadway construction, installation of a fire suppression system along the entire length of the project, construction of a scenic vista overlooking Long Lake and Mount Washington, and construction of a terraced granite amphitheater. All work is scheduled for completion in the spring of 2013, still ahead of schedule for the completion of the original project.

Established in 1995, ETTI is based in Lisbon Falls, ME, and specializes in trenchless utility construction by horizontal directional drilling. Clients include gas, communications, power and water and sewer utilities along with general contractors. In addition, ETTI also installs geothermal heating/cooling systems. The company currently owns three HDD units, ranging in size from 30,000 to 80,000 pounds pullback, drilling fluid mixing systems, excavators and vacuum excavators, a variety of support equipment and vehicles to transport equipment and personnel.

ETTI, (207) 353-5000, www.hdd-etti.com
Ditch Witch, (800) 654-6481, www.ditchwitch.com
McElroy Manufacturing, (918) 836-8611, www.mcelroy.com
Railhead, (888) 313-7455, http://railhead.com
Wyman & Simpson, (207) 737-4471, www.wymansimpsoninc.com
R.J. Grondin & Sons, (800) 287-1147, http://grondinconstruction.com

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