dipper, Glacial Lake Wisconsin covered over a million acres and deposited sands hundreds of feet deep in some areas, it is not surprising at all that you have soil types similar to what we have in Juneau and Adams Co. We do have it a bit worse in the southern regions of the old lake bed, as the sand is typically deepest in those areas. Castle Rock and Petenwell Flowages and their associated dams are very unique and the first of their kind in the US. They are considered a "floating" type construction, those dams are not anchored to bedrock in any way, they just sit on top of the sand and are anchored in place by deep piers that descend down into the glacial sand deposits. Kind of crazy really. As one travels east toward Ed's area, you get into more of the glacial moraine type areas, which can have more varied soils than the main lakebed, especially in lower areas. More rocks and more depressions that filled in with silts, clays, and deposits other than sand, even though the subsoil is still primarily sandy in makeup. Scientists are already assessing the groundwater/irrigation changes in the Central Sands region and are using the data as a conceptual model for the rest of the Midwest and other highly irrigated areas with highly permeable soils.