Because of the value placed on larger trees, damage to sidewalks and curbs should be repaired in lieu of removing established trees. Sidewalk grinding or ramping can remove a trip hazard. For severe lifting, the sidewalk must be removed and relaid, preferably curving around large roots. Root pruning before repouring can minimize changes of a reoccurrence. Most concrete contractors are not root pruning experts and can make a tree unsafe. Contact the Code Enforcement Department to make arrangements for the Public Works Department to safely trim roots, at no charge to the home owner.