19E - RFP - PARK MAINT - Laserfiche WebLink

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b. Limbs of weak structure or otherwise hazardous. c. Selective removal of limbs obstructing buildings or other structures or traffic signs. Generally, limbs closer than five (5) feet to a building or other structure should be removed unless doing so would severely damage a tree. d. Clear trees of sprout or sucker growth to a minimum height of eight (8) feet above ground level, Exceptions are allowed for young trees, which would be irreparably damaged by such pruning action. 1.08 POWER LINE CLEARANCE (PLC) PRUNING SPECIFICATIONS When trees are in the proximity of overhead energized lines and equipment, reliability of service, safety, and governmental standards require a reasonable amount of tree pruning to avoid conductor contacts and grounding of circuits through the trees. Power line clearance pruning, therefore, shall consist of the removal of tree branches for proper electric line clearance in order to minimize the likelihood of power outages and improve safety. Specifically, trees shall be pruned in such a manner as to: a. Clear all branches and foliage within ten (10) feet of primary electrical lines. b. Clear all branches that interfere with secondary electric lines within three (3) to five (5) feet c. Protect current tree health, condition and symmetry using Dr. Alex Shigo's book, Prtuiing Trees Near Electric Utility Lines as a guide. During the tree pruning process, all safe minimum working distances for energized conductors shall be observed. These clearances are defined under ANSI 2133.1-1994. Current ANSI specifications will supersede these requirements when they take effect. Any contact with energized lines shall be promptly reported to an authorized SAPRF representative. Access to backyards must be closely coordinated with the property owner, whenever feasible. Spikes may be used for PLC pruning on palms or other trees only when needed for proper safety reasons. 1.09 PALM PRUNING SPECIFICATIONS Palms shall be pruned at the 10:00 and 2:00 o'clock positions. Palm pruning shall consist of the pruning of the following, but not limited to, palms (Syagrus ronianzoffianum (queen palm), Archontophocnix cunningbainiana (king palm), Phoenix Canariensis (Canary Island date palm), Phoenix Dactylifera (date palm), Washingtonia filifera (California fan palm); and Washingtonia Robusta (Mexican fan palm) per these specifications. a. The removal of all dead fronds and other dead plant parts from the trunk. All loose frond sheaths shall be removed along the entire length of the palm trunk. b. The shaping of the palms "pineapple" beneath the fronds to achieve a consistent and aesthetic appearance. c. The removal of all flowers and fruit parts whether dead or alive. Districts 1, 4 and 5 Park Landscape RFP �^ 19 E-fou