While doing an internet search for a different report, I came across this gem. These are the proceedings of the 40th annual Convention of the Association of Midwest Fish and Wildlife Commissioners, 1973. On pages 37-46 is a presentation by the Colorado representative about the increased use of ORVs on public lands, the concerns about such use, and steps being taken to rein them in. It doesn't look like we have made it very far in 40 years........:W:
http://www.mafwa.org/documents/1973.pdf
http://www.mafwa.org/documents/1973.pdf