Worker Killed Clearing Rock Crusher The 45-year-old worker was operating the crusher for a construction company, which subcontracted to the US government to produce gravel for forest roads. The crusher itself was a cylinder inside which big hammers rotated at 2400 rpm, battering the rock to pieces. A loader placed rocks on a vibrating screen, which fed the crusher. Although it was possible to shut it down from a distance, it was important that someone watch the machine closely in order to notice jams. If a jam built up, it would mean hours with the machine shut down while workers dug out […]