The US state of Washington won't allow the creation of "island" properties. A landowner (including governments) can't subdivide a parcel of land unless there i

The US state of Washington won't allow the creation of "island" properties. A landowner (including governments) can't subdivide a parcel of land unless there is public right-of-way to all the divided parcels. Right-of-way isn't a parcel; although it theoretically belongs to the government it can't be sold. This makes it impossible for this problem to happen in the first place.