We want to put a large (maybe 15X25 ft) pond in our wooded yard. We'd like a waterfall and small bridge over the pond and a natural look. We did something similar when we lived in another state, but here in the DC suburbs, we have no references. I've been scoping out angie's list, etc., but have yet to get pointed in the right direction. Does anyone have a recommendation? We realize we may need to clear some small trees, but that shouldn't be a problem.

Thanks.