Basements can extend under the sidewalk. These extensions have covers that provide access and aeration to the subterranean space.
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Safe to walk on |
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Holey edge |
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Swiss cheezy |
Wear and tear of these sub-sidewalk basement covers can be accelerated by exposure to the elements and the integrity of the material.
That third one, it looks like you could step on it and plunge right through!
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