EE reports on 10/8/18 EE was carrying 5 gal. buckets of sand all week and EE's back began to feel sore but EE continued to perform job all week. EE did not report to Supervisor until 10/12/18, Health Bridge notified, self care measures were provided. EE came to work 10/15/18 complaining back still hurt & was sent to clinic. EE was placed on restricted duty.