So far, all of the holes but one, stay filled with water up to about 15 feet from the surface, but I dont know if this is year round, so cannot count on that. The one hole, all of the water disappears into the abyss as fast as I can pump it in there.
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The plan was to flush the holes with pool filter sand and water until topped up with sand. I may go the extra and pipe in a half inch wetting system to the top of each hole to be able to keep the sand wet as that will conduct much better, so I read anyway. Wish I had more time to test and measure effectiveness, but winter is on the way with plenty more drilling to do and all this pipe still need buried.
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