Decision Notice Eurasian Watermilfoil, Curlyleaf Pondweed, and Flowering Rush Treatment on Noxon and Cabinet Gorge Reservoirs
Jun 10, 2021 12:00 AM
Avista, in partnership with FWP, has issued a Decision Notice for the proposed action to maintain the use of herbicide treatment of Eurasian watermilfoil (EWM), curlyleaf pondweed (CLP), and flowering rush (FR) as has been done since 2010 under a previous environmental assessment (EA) as well as allow for the use of new herbicides as they become approved for use. Herbicides will be used to reduce coverage of EWM at access sites and high use areas. The proposed action will also involve the use of physical means of treating or harvesting aquatic plants including cutting, pulling, raking, diver dredging, and bottom barriers. Similar to herbicides, these methods may be used to reduce coverage at boat launches and other high use areas (e.g., docks, swimming areas). Mechanical harvest is anticipated to be the primary method to modify EWM beds for the benefit of the fisheries resources in Noxon and Cabinet Gorge reservoirs.