PennDOT District 11 is announcing geotechnical drilling is underway on Steffin Hill Road (Route 588) in White Township. Single-lane alternating traffic controlled by flaggers will occur on Steffin Hill Road from 8 a.m. to 4 p.m. weekdays through Tuesday, September 17 between Craighead Lane and Clayton Road. Crews from Armstrong Drilling will drill borings for a future project.