EMPLOYEE HAS HAD TOLERABLE BACK PAIN OVER THE YEARS FROM AN INJURY HE RECEIVED BACK IN 1998(?) ON ANOTHER WORK SITE (NOT MSHA). HIS BACK BEGUN TO INCREASE IN PAIN DURING THE COURSE OF WORK IN THE LAST FEW WEEKS. JUST THE WEAR AND TEAR OVER THE YEARS BROUGHT THE PAIN TO WHERE HE IS NOW SEEING A BACK SPECIALIST.