In April 2017 while using underground horizontal directional drilling (HDD) for the Rover Pipeline project, some 2 million gallons of drilling mud went down a hole near the Tuscarawas River and popped back out where it should not have, harming a wetland by smothering aquatic life (see Rover Pipeline Accident Spills ~2M Gal. Drilling Mud in OH Swamp). That 2 million gallon “spill” triggered a shutdown of all HDD work for Rover in Ohio. The Federal Energy Regulatory Commission (FERC) stopped all Rover HDD work until December 2017, when it allowed HDD work to resume (see FERC Gives Rover OK to Resume All HDD Work, Incl. Tuscarawas River). Then another 200,000 gallons of drilling mud went missing at the Tuscarawas location in January 2018, so FERC shut it down again (see FERC Stops Rover Drilling Near River After 200K Gal Mud Disappears).