What Causes Yard Sinkholes? Decaying Roots, Settling Fill, and When to Call the Water Company

Two sinkholes in yard/neighborhood. One dry, other unknown. Asks if aquifer caused, why some fill with water, some don't.

Causes

Underground water movement.
Most small home sinkholes: decaying roots/trunks, settling fill dirt, broken water pipes.

Won't normally fill except from rain/surface runoff.

If enlarging, call local water utility to inspect.

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