36″ Solid Rock Crossing
In March of 2021, the AccuLine team was called on a 36″ solid rock crossing in Dayton, TN. AccuLine was notified that another contractor was set to attempt the crossing, but was not able to by the time the jacking pit was opened. When reviewing the project details, our team noticed and was explained the necessity that the bore was completed on the grade of the engineered plans. The AccuLine team made the decision to install a line-of-sight pilot throughout the crossing in order to maintain grade and to determine the ground conditions throughout the crossing. Our team found that the crossing would start into hard limestone, then progress through clay, river cobble, sand, solid blue granite, and finish in more river cobble. Though these types of mixed ground conditions are very difficult to progress through, especially on line and grade, our team did not blink an eye. AccuLine built a custom, pilot ready roller cone head, specifically for this crossing, and began boring operations. The team endured 4 months of grueling drilling, and entered into the exit pit on line and grade! This crossing showed the unmatched capabilities of our team, and the hard-work we bring to every jobsite.