TREE AGE Each tree species has a characteristic life span. Therefore, the risk of tree failure increases as trees reach maturity. The hazard ratings in Appendix A provide a general guide for overall tree hazards based on the age of tree species growing in a recreation site. Tree longevity should be considered both when evaluating tree hazards in established recreation sites and when selecting locations for new sites. Short-lived species such as aspen, paper birch, and jack pine should be avoided unless plans are made to regenerate or replace these species as they reach maturity.

Next | Return to Table of Contents | Hazard Tree home page On-line Publications and Other Info. | St. Paul Field Office home page