AgdaPkt 2020-06-22 Joint SA PFA - Laserfiche WebLink

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6.1. - Page 26 of 52 The City is responsible for marking trees so that they are easily identifiable by Underground Service Alert and the Contractor. The Contractor shall be required to call Underground Service Alert (USA) at least 2 days before stumps are to be ground out. All tree stumps must be removed to at least 18 inches below the lowest soil level adjacent to the stump, or until deep roots are no longer encountered. The Contractor shall grind the stump a minimum distance of one and a half (1%') feet either side of the outer circumference of the stump, or until surface roots are no longer encountered. Stumps should be cut low enough to the ground where routing can be done safely. This may be accomplished by cutting the stump at the time of grinding, or at the time of tree removal except for infrastructure conflicts. Holes created by stump and root grinding must be filled the same day. The resultant chips from routing may be used to fill the hole to two (2") inches above normal ground level. All excess routing chips debris will be removed and loaded into transport vehicle for disposal. Any damaged paved surfaces shall be restored to their original condition. vii. Tree Planting City to supply trees, stakes and ties; Contractor crew provides only planting and installation. Planting lists should be compiled and submitted monthly or as needed. Contractor will guarantee the quality of the installation workmanship. a. Contractor shall provide all equipment, labor and materials necessary for the planting of trees throughout the City in accordance with the specifications herein. b. The City shall be responsible for marking locations and will notify Underground Service Alert (USA) prior to planting. c. Planting pit shall be dug twice the width and the same depth of the root ball. Before placing the tree in the planting pit Contractor shall examine root ball for injured roots and canopy for broken branches. Damaged roots should be cleanly cut off at a point just in front of the break. Broken branches should be cut out of the canopy making sure that the branch collar is not damaged. d. Tree shall be placed in the planting pit with its original growing level (the trunk flare) at the same height of the surrounding finish grade. The top of the root ball shall be level or slightly higher than the surrounding soil. e. Backfill material should be native soil. Eliminate all air pockets while backfilling the planting pit by watering the soil as it's put into the hole. f. Trees that are planted in parkways shall have a V-6" high water retention basin built around the tree capable of holding at least ten (10) gallons of water. In a concrete tree well, soil should be raked against the edge of the concrete to create a sloping basin. Immediately after planting, the tree shall be watered thoroughly by filling the water retention basin twice. PUBLIC WORKS SERVICES DEPARTMENT FY 2019-20 RFP FOR COMPREHENSIVE STREET TREE MAINTENANCE SERVICES 12 OF 37 237