We've put a video clip up on YouTube of the demolition of the Rotunda part of the Quarry Visitor Center. The link is
Its 5 1/2 minutes long. The part of the video showing the demolition of the ramp walkway into the building is sped up for the sake of time. Because of the rebar and support pillars in the walkway, it took more time to demolish than the two story cinder block part of the structure.
Video courtesy of Dinosaur National Monument. Video editing by GSA/NPS Geologist-in-Park Natalie DeMaioribus.