Chemical Weed Control

The U.S. Army Corps of Engineers Walla Walla District is procuring comprehensive chemical weed control services for their Lower Snake River Fish and Wildlife Compensation Plan covering approximately 18,000 acres of land across Washington and Idaho. The contract requires specialized herbicide application using various methods including aerial, boom, and backpack spot spraying across three primary pools: Lower Granite, Little Goose, and Lower Monumental. Contractors must be licensed pesticide applicators with GPS-enabled equipment capable of precise tracking and must provide detailed daily and annual reports while protecting native vegetation and controlling noxious weeds in Habitat Management Units, recreation areas, and operational facilities. The government will evaluate proposals based on technical documentation, past performance, and price using a best value approach to award to the lowest-priced, technically acceptable offeror. The solicitation deadline is September 25, 2025, with a mandatory site visit conducted on September 3, 2025, at the Lower Granite Natural Resource Office in Clarkston, Washington.

This procurement is designated as a Total Small Business set-aside with an anticipated total contract value of $9,500,000 over a five-year period including one base year and four option years running from December 1, 2025, to November 30, 2030. The contract will cover approximately 1,740 acres of treatment annually across multiple specific locations including Lower Granite Lake, Lake Bryan, Lake West, recreation areas, dam operations sites, and levee zones. Work will be performed across Habitat Management Units and recreation facilities in Washington and Idaho, with treatment limitations of 480 acres for Lower Granite Pool, 700 acres for Little Goose Pool, and 560 acres for Lower Monumental Pool. The spray season typically operates from March through October, targeting priority invasive species such as Caper Spurge, Canada thistle, and Spotted Knapweed. The solicitation includes multiple amendments addressing site visit scheduling, wage determinations, funding availability requirements, and performance work statement revisions based on industry feedback.