Contracts & Agreements_39-2024 - Laserfiche WebLink

Home Browse Search

(k) The specific techniques employed shall be consistent with industry practice for the size and species of tree being trimmed All dead, broken, damaged, diseased or insect infested limbs shall be removed at the trunk or main branch. All cuts shall be made sufficiently close, '/2 inch, to the parent stem so that healing can readily start under normal conditions. All limbs 2" or greater shall be undercut to prevent splitting. The remaining limbs and branches shall not be split or broken at the cut. All crossed or rubbing limbs shall be removed unless removal will result in large gaps in the general outline of the tree. Tree foliage shall be reduced by at least fifteen (15%) percent but no more than thirty (30%) percent. Contractor shall trim to remove dead wood or weak, diseased, insect - infested, broken, low, or crossing limbs. Branches with an extremely narrow angle of attachment should normally be removed. (I) (m) Small limbs, including suckers and waterspouts, shall be cut close to the trunk or branch from which they arise. (n) Heading cuts and/or topping will not be permitted unless specific approval is first granted by FCS Director or Superintendent. Heading, rounding over, or stubbing shall not be an accepted practice for reducing the size or the framework of any tree unless otherwise permitted by FCS Director or Superintendent. B. Traffic Clearance Pruning Tree pruning for traffic clearances shall provide clearances of at least thirteen (14') feet and no greater than sixteen feet (16') above finish grade for moving vehicles within the traveled roadway. Clearance for pedestrians on sidewalks shall be in accordance with standards set forth by the International Society of Arboriculture Pruning Standards (Best Management Practices) and the ANSI A300 Standards under "Pruning to Raise." Clearance trims are performed on a grid system or on a street -by -street basis. Clearances for adjacent structures and their connecting utilitylines (service drops), shall be determined by the Operations Manager and conform to the following: (a) The minimum clearance under trees within the street right-of-way shall be thirteen (14') feet over the traveled road and gutter pan, and nine feet (8') over the sidewalk side of the tree. When pruning the bottom branches, care shall be given to obtain a balanced appearance when viewed from across the street immediately opposite thetree. I:\cmo\Agreements\West Coast Arborists, Inc. Agreement for Improvement to Public Grounds (Tree Maintenance) FY23-0026.docx-ms