Abstract: On September 28, 2012, Employee #1, a foreman for West Coast Concrete, was working with a crew on a stage at the Venetian Hotel & Casino. They were installing guardrails around the large open center section of the stage, where Phantom of the Opera had recently closed and all of the show equipment had been removed. In addition to this open center area, there were several smaller holes where equipment had been removed. These holes were covered by plywood, but the plywood was not secured or marked "hole." A crew member had placed two moveable guardrails (K-rails) into place without securing them. Employee #1 attempted to move a piece of plywood that was in the way of the next guardrail and uncovered an approximately 3 foot by 3 foot hole that had been covered by plywood. Employee #1 fell through the hole and landed on the concrete surface of the basement level, approximately 23 feet below the stage. Employee #1 required hospitalization for multiple unspecified fractures.