The main set from David Duran was determined to contain the most recent boundary information. Parks missing from David's set were added from Deans set. Those parks are..........Antietam NB Arlington House,Benjamin Franklin NMEM, Big Hole NB, Catoctin Mountain Park, Chesapeake and Ohio Canal NHP, Chimney Rock NHS, Fort Point NHS, Fredericksburg NC, George Washington Memorial Parkway, Green Springs, Harpers Ferry NHP, International Peace Garden, John F. Kennedy Center for the Performing Arts, Kalaupapa NHP, Manassas NBP, McLoughlin House NHS, Monocacy NB, National Capital Parks - Central and East, Olympic NP, Prince William Forest Park, Rock Creek Park, San Francisco Maritime NHP, Thaddeus Kosciuszko NMEM, and Wolf Trap Farm Park for the Performing Arts. Park/Region staff were consulted for parks with major differences between the two sets.