This is one of the most extensive US MOUT facilities I've seen. It has a hospital, school, residential neighborhood, farm, and shops. Unlike many other new MOUT facilities which seem to be built to simulate third world conditions and construction this one is very "small town america". Makes me think this may be for training special forces. Are there special forces at Fort Lewis?
Military - Training, Military - Army
Links: www.hq.usace.army.mil, www.metavr.com