Layers here are NOT correct, park is not at layer 2 and sports pitch at level 1.  need to do some consensus here however, should this overhang be layer 1 or layer 0, I don't think layer 2 is appropriate.  I-70 would be one layer below of course.  As for the history of this "tunnel" I-70 is technically still at surface level so should be at layer 0?