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| My first thought was that there could definitely be some settling- especially if there were some big dry chunks that bridged across the trench and formed some voids. The round hole in the picture, however, makes me think that it could be a washout. For piece of mind, I would just dig down and check on it. Finding out that the tile is fine and having a bill for digging it up for no reason is why cheaper than dropping the front end of a tractor into it years later. | |
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Tile holes
