2007-12-03 Council Agenda - Laserfiche WebLink

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4. Trees/Shrubs and Tree Grates Installation Expense, Maintenance and Operation A.. Trees and grates shall be installed at the expense of the developer. Upon acceptance of the trees and grates, the City will assume financial responsibility for maintenance. B. An acceptable list of trees is included in the tree schedule. Trees should spacing be planted at a maximum of 40 feet, subject to the approval of the Director of Public Works. The trees should be aligned with new or existing lights.Tree alignment and spacing shall be approved by the Director of Works. Balled and Burlap plants C.: Nursery grown trees dug with firm, natural balls of earth in which they were grown, with ball size not less than the diameter and depth recommended by ANSI Z60.1 for type and size of tree or shrub required; wrapped, tied, rigidly supported, and drum-laced as recommended by ANSI Z60.1. Tree Measurements D.: Measure according to ANSI Z60.1 with branches and trunks or canes in their normal position. Do not prune to obtain required sizes. Take caliper measurements 6 inches (150 mm) above original root ball for trees up to 4-inch (100-mm) caliper size, and 12 inches (300 mm) above ground for 4” caliper trees and larger sizes. Measure main body of tree for height and spread. Warranty. E.The Warranty Period for all plant material is for a period of one year from the date of Substantial Completion or as extended accordingly. The warranty period shall run concurrently with the successful maintenance period established for each plant. Remove and replace all dead plant material immediately or within thirty (30) days of notification by the City. Replace any tree that is dying, scarred, damaged or that has lost its central leader or typical branch structure or in an unhealthy condition as determined by the Architect. The warranty period will begin anew for each replaced tree and continue for a full one-year after each replacement. The contractor is to provide the Architect with a record plan that shows the replaced tree and the date of its replacement. All replacement plant material shall conform to the plant material requirements of the original plant and match the size and branching structure of other typical plants nearby. F. Grade : Provide only “Specimen” quality plant material of sizes and quantity complying with ANSI Z60.1 for type of plant material required. Collected plant material is strictly prohibited unless specifically requested on the drawings. All plant material of one species shall be of matching structure with similar size, height, and spread. Trees of a larger size may be used if acceptable by the Architect and at no additional cost to the Owner. Shade harvested Trees: Balled and burlap, with a straight trunk, well-balanced crown, a straight and strong central leader, of caliper size and branching height indicated, complying with ANSI Z60.1 for type of trees required. G. Gravel Mulch. 3/8” Pea Gravel, light grey color range. Submit samples for approval by Architect. Do not make substitutions: If specified gravel mulch is not obtainable, submit proof of non-availability to Architect together with proposal for use of equivalent material for review and acceptance by Architect.