Yellowstone National Park this summer is stepping up watercraft inspections to ensure against the introduction of aquatic invasive species in Park lakes. Spokesman Al Nash says Park Service staff will conduct the required inspections, at the points permits are issued for the boats. Nash says the park has been doing inspections in recent years, but the change this year is that watercraft inspections are being required before a boat sticker is issued for Yellowstone. Nash says the boats must undergo inspection regardless of if they were inspected just down the road by state officials. Furthermore, he says Park Service staff will be conducting inspections seven days a week for all boats that launch from Bridge Bay, Grant Village and Lewis Lake boat ramps. Nash says the Park is aware that it has some aquatic invasive species in some of its lakes. Nash says, “Our ongoing effort is to be really aggressive in looking at watercraft before they go into the water, and making users aware of this problem that exists here and in surrounding waterways.” Nash stresses that permits are required for all boats and float tubes. Since 2009, he says Yellowstone’s AIS program staff has had contact with more than 7,000 park boaters and performed more than 3,000 watercraft inspections, which resulted in more than 120 affected boats being cleaned with the use of a non-chemical AIS decontamination treatment.