ON 8-15-03 EE CALLED HIS SUPERVISOR AT HOME. HE STATED THAT AT QUITING TIME ON 8-14-03 HE WAS GETTING OFF A ROCK TRUCK, STEPPED ON GRAVEL AND HURT HIS KNEE. HE SAID AT THE TIME HE DID NOT THI NK HE HAD HURT HIMSELF. BY THE MORNING OF 8-15- 03 HE STATED THAT HIS KNEE WAS SWOLLEN.