Drone video released by the California Department of Water Resources shows how repairs are moving along at the Oroville Dam’s main spillway, which crumbled during the extremely wet winter and forced the evacuation of 180,000 people. The video of crews laying down and compacting concrete (set to soothing music) was posted to the department’s YouTube page, where it regularly shares updates on the construction progress.   Reconstruction of the main spillway is on track to be completed by Nov. 1, 2017, in time for California’s rainiest months. Since the spillway’s erosion in February, crews have been working to remove and rebuild 2,270 feet of the spillway.