EE was using a water truck to wash down. The EE backed up onto a stockpile, and overturned the rear section of the articulated truck rocking the cab side to side causing them to hit their head. EE retuned to work on 10/7/22 with no restrictions. The following week EE went to the eye dr. 10/13/22 and was written out of work through 10/14/22 making this accident reportable.