My “overkill” just means my hole is bigger-5’x15’6” (1.524m x 4.724m...see what I did there [emoji4] ), and now a tad deeper at 14”(35.56 cm). I laid some crushed stone about 2” thick, did 18” dowels every 8” and then tied my 1/2” rebar that’s every 8” both directions to the dowels, but spaced...