The latest round of federal impact inspections of U.S. mines resulted in 235 citations and 16 orders.
The Mine Safety and Health Administration said Wednesday that coal mines accounted for 171 citations and 15 orders issued during January's inspections. Federal inspectors issued 64 citations and one order to metal and nonmetal mines.
Inspectors visited 12 coal mines and four metal and nonmetal mines.
MSHA began the impact inspections in 2010 after the Upper Big Branch Mine explosion in southern West Virginia killed 29 workers. They target mines MSHA believes need more attention and enforcement.