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NPS
Visitors cars outside of Delta-01 at a summer open house
Recreational Visitors
2008 – 30,615
2007 – 24,655
2006 – 16,754
2005 – 7,800
2004 – 4,924
To find statistics from other National Park Service units click here...
Did You Know? The initial groundbreaking for the first Minuteman Missile silo in South Dakota occurred on 9/11 – September 11th, 1961.
Last Updated: September 02, 2009 at 16:38 EST