Parks and Public Landscaping Advisory Board Agenda and Packet 2018 02 01

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VALUE, PURPOSE, and PUBLIC SAFETY Large Cottonwoods like these are found all over open space areas in Colorado. They are some of the biggest trees in the state. When they were planted, it was usually along a farmer's ditch or some other consistent source of water. As we have developed areas in the last 50 years developers cut off many of the water sources that allowed these trees to grow so large. Once the water is cut off, the trees begin to decline and become brittle. Large limbs and sections of Cottonwood trees fall out in wind and snow storms. There is also a phenomenon known as "Sudden Limb Loss" that will cause Cottonwoods to drop large limbs for no apparent reason during the summer months. Cottonwoods also frequently drop limbs in years when we have excessive rain in the spring. The trees absorb so much water at once that they cannot support the weight. These are beautiful trees and very commonly the only ones in a given area. Beauty draws us to them. Unfortunately, we know that they are not a very safe species and we should not draw the public to spend time under the canopies. These trees are also a huge attraction for our local wildlife. Owls, squirrels, raccoons and countless other species will use these trees as a refuge. There are not many trees to choose from in many areas of the state. One single Cottonwood could be home to dozens of animal and insect species. All things considered, public safety is the priority. If the trees are removed any possibility of injury will be mediated. If the trees are to remain, steps need to be taken to ensure that the public is aware of the possible hazards of the trees. The public should also be prevented from entering the area under the trees or a "designated area" of safety. Please let me know if you have any questions. Sincerely, Kevin Marks Board Certified Master Arborist RM -747 Certified Nursery Professional #303 Certified Landscape Maintenance Technician 1998 Colorado Department of Agriculture Qualified Supervisor 1996 Ornamental, Forest, Turf, Rangeland, Aquatics, Research and Demonstration