The space is likely owned by the city and it is their (that is: the taxpayers') sidewalks, curbs, and infra that will heave & form a trip hazard; therefore the tree species is up to them. Note: Property owners remain liable for sidewalk damage caused by street trees if the damage existed prior to July 1, 2017. Small trees should be a minimum of 10 feet from structures while large trees must be at least 30 feet from them. Root pruning is highly stressful to trees and cannot be done indiscriminately. Trees with superficial roots that grow along the surface pose an additional risk to sidewalks and driveways. Even a tree with a non-aggressive root system can cause damage if it is too close to a concrete structure. Are Your Sidewalks Safe? Trees with Roots that Don’t Spread (By Zone) Tree roots want all the water they can get! The optimal tree to plant on the edge of a property line to prevent trees from damaging the sidewalk is slow-growing trees. Placement. Trees That Can Be Planted Over Water Pipes. Homes, sidewalks and driveways are also in danger of becoming puckered or … Poplar (Zones 3-8): A tall tree with aggressive roots known for causing sewer and foundational damage; American elm (Zones 3-9): A full tree that has shallow roots that can disrupt your lawn, sidewalk or driveway; Silver maple (Zones 3-9): A tree with gorgeous, shimmery leaves that also has roots that often end up growing above the ground The success of root pruning depends on the species, size, and age of the tree, the location of the cuts, environmental conditions, and the overall health of the tree. Some trees—such as Bradford … Seattle, in fact, has formalized a process under its Trees and Sidewalks Operations Plan (approved in 2015) in which both an arborist and an engineer perform a joint field review of tree and sidewalk conflicts that need to be addressed and make initial recommendations for repairs. Trees are usually prized elements in a landscape, but a sprawling root system may sometimes pose a threat to sidewalks… Some communities pay for damage … From evergreens to trees with showy flowers or bright fall color, you have lots of options when choosing fast-growing shade trees. Residents in many western communities are concerned about the upkeep and dangers of uprooted sidewalks caused from oak trees that line streets. A number of these trees have noninvasive roots that … As a part of StreetTreeSF, the City is repairing sidewalks with severe damage and walkways in heavily traveled corridors to reduce tripping hazards. It is important to have appropriate trees for the treelawn width - inadequate or no - to avoid unnecessary damage and expense. Where you plant your trees is an important consideration because tree roots can damage concrete walkways, walls, septic tanks and swimming pools. 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