A sunken concrete sidewalk is an unsightly flaw in a property's landscaping. To prevent such a dangerous condition from happening to your community, use the following steps to restore the ground and make your sidewalks as safe as possible. Some of the causes of a sunken concrete sidewalk are weathering and improper installation by contractors. Step 1 - Establish a Plan of Action To restore the condition of your sunken concrete sidewalk, it's important to have a plan in ...