WORKING IN SIDE MILL REMOVING PLOW SUPPORTS AND HOLDERS, EE WAS IN A HAND AND KNEE POSITION TRYING TO LIFT SUPPORT OUT OF MILL WHEN HE HEARD A POP IN HIS ABDOME N. HE DID NOT HAVE ANY PAIN AND KEPT WORKING. HE REPORTED TO THE SUPERVISOR ON 3-3-01. HE WAS TAKEN TO DR. ON 3-5-01. HE HAS BEEN REFERRED TO ANOTHERDR. ON 3-7-01 W/UMBILICAL HERNIA.