Guy P. Meilleur, Practicing Arborist, Aerial Consultant @ www.historictreecare.com provides the following information on Managing Mature Trees. West Davis Street in Burlington is lined with willow oak trees planted ~80 years ago. One tree fell over in a storm, so the City looked at management options. 3 trees were removed, and 35 were reduced by specified pruning methods. Three years later, 34 of those trees are doing well. No pruning is needed in the near future.