4.9 
This concrete floor is cracked and sinking. ...
Soil has been washed away under this concrete slab. Eventually, it will cause the slab to crack and sink....
Tripping hazard from a broken, sunken concrete sidewalk....
The patio in the entry way to the house was sinking down and created big gaps, presenting daily tripping hazard...
Soil has washed out from beneath this concrete front porch....
Concrete patio is sinking due to soil erosion....
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