Equipment:StraightLine HDD® RockEye Air Hammer 5.0 on a Vermeer® D50x100, with a Sullair® 1150cfm x 350psi air compressor. The Challenge: DBU Construction, Inc. was awarded a challenging 500′ bore near Louden, NH. Ground conditions included sand, gravel and granite, including multiple rock beds, as well as large granite boulders. The bore path was to cross … Continued