So, based on the Google Earth contours and slope profile, here's a picture of where I decided to dig out a few swales by hand last year. Again the actual, on-the-ground measurements put those swales in slightly different positions. And, they don't precisely follow the contours at the edges, since I want to direct whatever water flows there in, across the valleys, towards the center ridge (or into a series of storage ponds.) The only swale that is operationally functional at this point is the one up by the house - and it's covered in snow. But eventually these contours may serve as guides for ripping the subsoil in parallel lines down (i.e., heading north) the hillside.
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