Tree Hazards: Recognition and Reduction in Recreation Sites
This publication is primarily for the practicing forester or technician who has responsibility for the administration, operation, and maintenance of recreation sites, particularly campgrounds, picnic grounds, and winter sports areas in the central Rocky Mountains.
The link address is: http://www.na.fs.fed.us/spfo/pubs/hazardtrees/treehazards/thazards_toc.htm