Any flyfishermen on here?

I heard that here in Colorado If you take your boat out of a lake effected with some kinda snail you have to sterilize the bottom before they will let you leave the boat ramp area. Here, read up on it......

http://wildlife.state.co.us/WildlifeSpecies/Profiles/InvasiveSpecies/Pages/NewZealandMudsnail.aspx