DWA Weed Treatment

The U.S. Army Corps of Engineers, Walla Walla District, is soliciting offers for herbicide treatment of noxious and invasive weed species at Dworshak Dam and Reservoir in Idaho under solicitation number W912EF26QA061. This firm-fixed-price contract requires comprehensive chemical and mechanical weed treatment services across approximately 120.3 acres, targeting Idaho-designated noxious weeds and 13 specified pest species including spotted knapweed, common mullein, bull thistle, and ventenata. The successful contractor must possess a current Idaho State Professional Pesticide Applicator's License and comply with USACE Walla Walla District Pest Management Program Implementation Instructions, OSHA standards, and the Corps of Engineers Safety and Health Requirements Manual EM 385-1-1. Prior to work commencement, the contractor must develop and submit a Quality Control Plan, Accident Prevention Plan, Activity Hazard Analysis, and Chemical Spill Contingency Plan. The offer deadline is May 6, 2026, at 12:00 PM, with initial treatments required by June 15, 2026, and secondary treatments scheduled for July 8 through August 2, 2026.

This procurement is designated as a Total Small Business set-aside under NAICS code 561730 (Landscaping Services), meaning only small businesses are eligible to compete. The contract encompasses four line items: 3.2 acres at the Powerhouse/Dam with helipad (first application), 2.3 acres at the Powerhouse/Dam (second application), 70.9 acres in Resource Areas, and 43.9 acres in the Grandad Mitigation Area, with specific geographic coordinates and treatment zones detailed in the attached reference maps and location tables. The period of performance extends from May 15, 2026, through August 31, 2026, with performance inspection and acceptance occurring at the Dworshak Project Office in Ahsahka, Idaho, under the supervision of Jessica King. The contractor must achieve an 80 percent performance standard for identified noxious and pest weed elimination and submit daily pest control application records within 10 business days of each application. No specific budget range or award value is disclosed in the solicitation documents provided.