04d DWA Weed Treatment 2025 - PWS Att4 Treatment Area Map (Bracken Fern).pdf

The document is a Performance Work Statement (PWS) Attachment 4 for a weed treatment contract with the U.S. Army Corps of Engineers Walla Walla District at Dworshak Dam and Reservoir in Idaho. The contract involves chemical and mechanical treatment of noxious and pest weeds across approximately 168 acres, including 148 acres of general herbicide treatment and 20 acres of bracken fern treatment. Key weed species to be targeted include Bull Thistle, Common Mullein, Meadow Knapweed, and 10 other specified invasive plants.

The contract is a firm-fixed-price, non-personal services agreement with a performance period from May 1 through August 31, 2025. Contractors must possess an Idaho State Professional Pesticide Applicator's License and be capable of identifying target weed species. Initial treatment work must be completed by June 15, 2025, with specific treatment areas including the Ahsahka area, Dworshak Dam, and Grandad Elk Mitigation Area. Herbicide application must follow USACE Walla Walla District Pest Management Program Implementation Instructions, with treatments designed to kill noxious and pest weed species within designated treatment areas.