EE WAS OPERATING A SCOOP, TRAVELING OUTSIDE OT PICK UP SUPPLIES. APPROX. 50' FROM THE SURFACE THE SCOOP LOST HYDRAULIC POWER AND BRAKES. EE WAS UNABLE TO CONTROL THE SCOOP AND RAN INTO A PREFA B WALL. EE WAS STRUCK BY A TIMBER. HE SUSTAINED A FRACTURED PERLVIS AND DISLOCATED LEG.