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CITY OF PLEASANTON URBAN FOREST MASTER PLAN | 111 <br />URBAN FOREST MANAGEMENT PRACTICES <br />Table 1-10. Infrastructure Conflict Action Menu <br />Solution <br />Category Solution Description <br />Conflict Prevention Right tree, right place Available soil volume, presence of existing infrastructure, and site conditions <br />should be deciding factors when selecting species for tree planting projects. <br />Infrastructure Adaptations <br />Expand tree well space Large trees require large areas to grow at the ground level. Expanding tree <br />wells to provide growing space can help avoid conflicts with sidewalks. <br />Alternative sidewalk materials <br />Technological advancements for sidewalks, such as rebar concrete <br />reinforcement, pervious pavement, and flexible joints, continue to be developed <br />and may provide adaptive solutions. <br />Meandering sidewalks Rebuild sidewalks to meander around planting areas, allowing the trees more <br />grow space. <br />Bridging A bridged surface that does not require compacted subgrade can replace a <br />damaged sidewalk. <br />Root control devices <br />Root control devices are designed to guide roots underground and away from <br />surface-level infrastructure. Note that root barriers are least effective in poorly <br />aerated soils that are commonplace in the built environment (Randrup et al. <br />2001; Gilman 1996). <br />Tree Work <br />Root pruning <br />Root pruning should be considered when infrastructure changes are not possible. <br />When possible, avoid pruning roots greater than 3 inches in diameter. All root <br />pruning decisions should be made by a qualified arborist as pruning roots within a <br />distance five times the tree’s trunk diameter can impact tree health. <br />Removal <br />In some cases, tree removal is the only feasible option and should only be <br />approved when all other options have been considered and determined to not be <br />viable to resolve the infrastructure conflict.