Abstract: At approximately 11:30 a.m. on April 16, 2010, Employee #1, a lead carpenter foreman for Kaiser Permanente, was installing conduit for electrical wiring for a card reader system. A coworker was using a Hilti rotary hammer drill fitted with a 36-inch concrete auger bit to drill a horizontal plane underneath the sidewalk for the conduit to be placed. Employee #1 reached down with his gloved hand to help align the bit. The coworker started the drill while Employee #1 still had his hand cupped around the bit. Employee #1 was treated for a broken index finger and amputation of part of his ring finger on his left hand.