06/08 EE was picking up a piece of Dry-stack stone and felt sharp pain lower back. EE worked on 06/09. EE rested over weekend and felt good enough to go back to work on 06/12. Pain in lower back worsened and EE went to chiropractor on 06/15. EE worked on 06/16 and rested over the weekend. EE worked on 06/19 for a full day and filed a report of injury and went to clinic on 06/19.