Abstract: At approximately 2:30 p.m. on March 31, 2006, Employee#1 was struck on the head by a pile driving hammer that fell after being suspended with a crawler crane (Manufacturer: Link Belt Model Number: 248HYLAB5 and Serial Number: N5JS-6947). Employee #1 fell approximately 15 ft to the ground, along with the metal template where he was standing to conduct the work, after the hammer struck him and the template. Employee #1 landed on top of the template, in the sitting position, with his head against the hammer. Employee #2, another pile driver, who was also on the template getting ready to cut the other side of the leads, fell to the outside of the template over the steel guardrails that had been installed on the template to prevent employees from falling. Employee #2 was walking on the template, away from the hammer in the east direction as the hammer struck the template and fell to the ground. Employee #1 suffered serious injuries to his head and was transported to the hospital and Employee #2 suffered serious injuries to his lower extremities.