It shall be the duty of the owner or owners of the property abutting or adjoining the streets within the city to maintain the sidewalks and curbs extending along, in front of, abutting or adjoining the property in a safe and serviceable condition. All such owners shall be liable for all personal and property damage resulting or arising from the owners failure to maintain the sidewalk or curb in a safe and serviceable condition regardless of whether the city gave notice of disrepair as allowed by Section 13.20.020. For purposes of this Section, sidewalk “maintenance” means the repair or replacement of any cracked, broken or uneven sidewalk sections with a gap, crack or drop of one inch or more. For purposes of this Section, sidewalk “maintenance” shall also include the maintenance of tree wells located in the sidewalk and is limited to keeping tree wells free of weeds, debris and trash and keeping the surface of the tree well level with adjoining sidewalk so as not to create a tripping hazard. The City shall be responsible for the cost to repair any city electrical outlets situated in tree wells.