An employee was performing repairs to the fan deck in a cooling tower. Upon entry into the cooling tower, the platform failed and the employee fell approximately 50 feet to the concrete basin at the bottom of the tower. The employee was hospitalized for three fractured vertebrae in the back, fractured tibia bones in both legs, a left elbow fracture, injuries to both knees, internal bleeding, bruised lungs, a concussion, lacerations to the head, and nerve impingement (back).