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Advertisers from the print edition of Underground Construction, Vol. 65 No. 4, April 2010.

Congressional concern about "fracing" took another step forward when the chairman of the House Energy and Commerce Committee sent letters to eight companies asking for details on the chemicals they use during horizontal drilling of shale gas deposits. Rep. Henry Waxman (D-CA), chairman of the committee, implied in a memorandum to committee members that the "Big Three" of fracing may have violated a voluntary memorandum of agreement they signed with the EPA in 2005.

Five new compact CX B Series excavators from Case offer zero tail swing and a center-swing boom for maximum productivity in even the tightest working spaces.

The new E18B zero tail swing, compact excavator delivers more digging performance and an adjustable track gauge for easy maneuverability in tight spaces.

Kobelco Short Radius ACERA excavators use the new Integrated Noise Dust Reduction system.

The E35 is a zero tail swing (ZTS) model gives unrestricted rotation and greater flexibility when you work close to objects or walls.

The Volvo ECR145C short swing excavator has a heavy counterweight and stable center of gravity.

Recently upgraded to the Dash-3 series, the Hitachi Zaxis 35U-3 meets EPA Interim Tier-4 emissions requirements.

The XT850 features a dual-pivot excavator system with a 260 degree total excavator sweep for wide offset digging capability.