My question is this:
We just purchased our first home & with it came a beautiful piece of land that has been deemed partial wetlands. were not 100% sure if all of it is because its entrapped in blackberry bushes. I have been searching for weeks now to find out if its ok for us to get rid of them (without chemicals of course) or are they a native plant to wetlands around Washington state?

I haven't been able to find a single article that didn't have someone talking about how they can't build on there land. We don't want to destroy or build on it. We want to revive it to its natural state. But, first things first can we get rid of all those blackberry bushes?

I cut them back and apply Roundup, very carefully to the stump.

Keep a few for the delicious berries!

It will be a constant maintenance problem, as birds do seem to spread the seeds with their droppings. :(

Please DO NOT use Round-up in wetland areas; it's can adversely affect certain aquatic animals especially amphibians. There are supposedly other glyphosate (the main active ingredient in Round-up) products that are relatively safe to use in these situations, but they would need to be used very carefully...

Here's an additional link for safe glyphosate use: http://www.for-wild.org/download/roundupmyth.pdf