For a wetlands restoration project at Newman Lake (just east of Spokane @ ID border) they are dredging huge quantities of lake bottom (about 133,000 yards). This has been independently analyzed, and is showing over 50% organic matter, sandy loam with a pH about 4.9, and no recorded contaminates.
This will be available this spring/summer. Might be a great opportunity for anybody in the region looking for good topsoil.
http://spokane.craigslist.org/grd/4291180976.html
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