DARBY — Stevensville resident Andy Carlson can be recognized for creating a staple fly, the Purple Haze. Watch the full video below:Respecting the resource: Andy Carlson reflects on 50 years guiding, flyfishing legacyHowever, his impact reaches far beyond the tip of his rod, as he helped revitalize the Bitterroot River. Emily Brown/MTN News Andy Carlson catching a cutthroat troutRaising the water level wasn't the end of Carlson's advocacy for a healthy ecosystem. "The concept of creating a wild trout fishery, which means, number one, eliminating the stocking. "It’s up to you guys to keep the ball rolling, to keep educating, to keep telling people the importance of a wild fishery, of a wild river.