A worker  with Structural Systems Repair Group uses a crane to reach the top of the clock tower on the Clark County Courthouse Thursday morning as work begins to renovate the structure. Clark County Judge-Executive Henry Branham said workers are scheduled to begin removing the tower Monday morning with the dome first, followed by the clock. The bell is scheduled to be removed Tuesday, he said. The tower will be removed and replaced with a temporary roof until the new tower is ready in the spring.