The US National Park Service says Vermont’s lone national park had $1.7 million in economic impact in the state, creating 25 jobs. A report by the Park Service released Monday found there were 32,403 visitors to the Marsh-Billings-Rockefeller National Historical Park in Woodstock. Park officials said it is the only national park that tells the story of conservation history and the evolving nature of land stewardship in the United States. The park describes itself as a living symbol of three generations of conservationist thought and practice. A national study found that national park tourism returns $10 to the economy for every $1 invested in the park.