National Park to Use Aerial Spraying for Weeds| 9/7/2012
The park will remain open during spraying operations, but visitors should avoid areas that are being sprayed or have just been sprayed.
"Some visitors may find the low flying helicopter to be an intrusion," said Superintendent Valerie Naylor. "We never want to intrude upon the visitors` enjoyment of the park, even for a day. However, the need to control leafy spurge and Canada thistle and their impact on the park`s native vegetation makes this short-term inconvenience a necessity."
People with questions should contact the park at 701-623-4466