EE OPERATING SWEEPER MACHINE. LOOKING DOWN AT BRUSHES ALONG SIDE VEHICLE, RAN INTO A SUPPORT BEAM OVERHEAD. /EE SEEN AT BY DR. RELEASED TO WORK, TOLD SUPV. NO RESTRICTIONS, PAPERWORK SENT TO WRONG ADDRESS. / LATER EE COMPLAINED OF PAIN, RET.TO DR., CONTINUED ON LIGHT DUTY. REPORTED TO MSHA 2 WORKING DAYS LATER. / WHY REPORTABLE - LIGHT DUTY