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HomeMy WebLinkAboutTR_ Arborist Report Bella Vista_10102024Arborist Report For: Bella Vista Apartments Prepared on:September 16th, 2024 Prepared by:Daniel Potts 866-815-2525 www.aplustree.com 780 Azuar Ave. Vallejo, CA ISA Certified Arborist WE-11534A Tree Risk Assessment Qualified (TRAQ) Background Information Assignment This report was prepared on behalf of Bella Vista apartments and is concerning 2 black cottonwoods (Populus trichocarpa), located at 2100 Lake Washington Blvd. N The assignment is to perform a visual assessment in regard to health condition, structural integrity, a threat of pest/disease and potential hazards. daniel@aplustree.com The assessment was performed on June 6th, 2024. The report has been requested because the root plate around one of these trees was moving during a recent high wind event, so the property managers called us out to take a look at this tree as well as the surrounding hillside. This visual inspection was from ground grade only. The assignment is to assess and provide recommendations for future action. aplustree.com A Plus Tree, LLC 780 Azuar Ave. Vallejo, CA 94592 Arborist Disclaimer Arborists cannot detect every condition that could possibly lead to the structural failure of a tree. Trees are living organisms that may fail in ways we do not fully understand. Conditions are often hidden within trees and below ground. Arborists cannot guarantee that a tree will be healthy or safe, or fail for that matter, under all circumstances, or for a given period of time. Likewise, remedial treatments, like any medicine, cannot be guaranteed. Treatments, pruning and removal of trees may involve considerations beyond the scope of the arborist’s services such as property boundaries, property ownership, sight lines, disputes between neighbors, landlord- tenant matters, etc. Arborists cannot take such issues into account unless complete and accurate information is given to the arborist. The person hiring the arborist accepts full responsibility for authorizing the recommended treatment or remedial measures. Trees can be managed, but they cannot be controlled. To live near a tree is to accept some degree of risk. The only way to eliminate all risks is to eliminate all trees. This consultant does not verify the safely or health of any tree for any period of time. Construction activities are hazardous to trees and cause many short and long-term injuries, which can cause trees to die or topple. Even when every tree is inspected, inspection involves sampling; therefore, some areas of decay or weakness may be missed. Weather, winds and the magnitude and direction of storms are not predictable, and some failures may still occur despite the best application of high professional standards. I hereby declare that the above observations, discussion and recommendation are true to the best of my knowledge, belief and professional opinion. In addition, A Plus Tree is held harmless of any of these opinions from future tree failures. Sincerely, Daniel Potts A PLUS TREE, LLC ISA Certified Arborist WE-11534A Tree Risk Assessment Qualified (TRAQ) daniel@aplustree.com Observations aplustree.com A Plus Tree, LLC Photos (Tree 1) 780 Azuar Ave. Vallejo, CA 94592 At the time of the assessment, I observed the following from 2 trees on the surrounding hillside (please also refer to the photos below): Tree #Species DBH (in) Height (ft) Canopy Spread (ft) Notes 1 Black cottonwood (Populus Trichocarpa) 38 100 feet 35 feet Tree is on a steep slope, leaning towards a building. There are few roots on the tension side of the lean, and root plate of tree was moving in a recent wind event. 2 Black cottonwood (Populus Trichocarpa) 16 75 feet 30 feet Tree has suffered a stem failure about 30 feet up the trunk, and the broken section is hung up on the maples below it. The area below the broken stem is regularly used by residents walking their dogs, and the tree is within 1 tree length of the building. Discussion Photos (Tree 2) Tree 1 has a significant lean towards the building, is exposed to wind coming from the typical prevailing wind direction for the region, has very little roots on the tension side of the lean, and is on a slope with an angle of repose that is susceptible to erosion and earth movement. Within a 3 year time period, it will probably uproot and has a high probability of hitting the building, with a medium probability of hitting a resident inside. In the event of failure and impact, it would likely have significant consequences for the building, and anyone hit by this tree would be severely injured. Tree 2 has already failed approximately 40 feet up the stem, and is suspended in the trees below it. Within a 3 year time period, the stem will probably dislodge from the canopies it is suspended in. The area below it is occasionally occupied by residents: In the event of failure, there is a medium probability of it hitting someone, but the consequences would be severe. aplustree.com A Plus Tree, LLC 780 Azuar Ave. Vallejo, CA 94592 Site Map N Recommendations aplustree.com A Plus Tree, LLC 780 Azuar Ave. Vallejo, CA 94592 Tree 1: Due to the risk factors stated in the discussion section and the increased probability of land movement related to the angle of slope, reducing this tree to a wildlife snag would not present a tolerable level of risk for the client. Therefore, this tree is recommended to be completely removed. All pieces will be chipped and moved offsite to avoid putting more weight on the slope and creating more hazardous conditions in the event of land movement. Tree 2: Due to the risk factors stated in the discussion section, this tree will be reduced to a 10 foot tall wildlife snag to mitigate the risk posed by this tree to a level that is tolerable for the client. All pieces will be chipped and moved offsite to prevent additional weight on the slope.