You have the MLS number? I may have looked at the same property.
This was my favorite, and one that I put an offer one, and may do again:
http://www.landwatch.com/Pierce-County-Washington-Land-for-sale/pid/200035207
I put in a reasonable offer but will probably put in another. The problem is, the owner of the land isn't the kind who likes to deal, and I don't want to anger him because I know he has a lot of guns, and he actually lives a couple parcels north of this property. (I also know he is years behind on his property taxes)
There is also another 10-acre parcel for-sale-by-owner directly adjacent to the South, which would double the length of river you have to work with, but frankly the southernmost property is not the same quality, mostly overgrown alder. The owner to the south also wants $80,000 for his acreage, which is pretty rediculous considering what other properties are going for.
This weekend I am looking at a 20-acre property a little further south (upstream) on the Little Mashall. Partially cleared with south-facing slope. If you are wondering how these properties have south-facing slope but a river that runs south-to-north, it is hard to explain. Just look at the topo maps on google maps and you'll see what I mean.
The soil here has a lot of shale in it. Good for percolation but hard to dig in. Perhaps if there are a few permies in the area we can go in together on some earth-moving equipment.