An interagency working group, including three state agencies - Montana Fish, Wildlife & Parks (FWP), the Department of Natural Resources & Conservation (DNRC), and the Montana Department of Agriculture (MDA), proposes to manage and, if possible, eradicate a noxious aquatic weed, Eurasian watermilfoil (EWM), in Beaver Lake, near Whitefish, Montana. Removal efforts may include use of barrier mats, mechanical removal, herbicide treatments, or a combination of these. The proposed action adheres to the state agency response protocol established in Montana’s Statewide Strategic Plan for Invasive Aquatic Plant Management and Resource Protection 2011. The purpose of the protocol is to coordinate an effective interagency response and, where feasible, contain and eradicate invasive aquatic plants.The proposed action conforms to Montana’s Statewide Strategic Plan for Invasive Aquatic Plant Management and Resource Protection 2011. The proposed action provides opportunity to use barrier mats, mechanical removal, herbicide treatments, or a combination of these to eradicate Eurasian watermilfoil from Beaver Lake. Based on information derived from the interagency working group, environmental review, and public comment, FWP approves the proposed management actions to address the infestation of Eurasian watermilfoil in Beaver Lake.