Lake Isabella Dams and Headquarters – Weed and Pest Control

The Department of the Army Corps of Engineers Engineering District Sacramento seeks weed and pest control services at Lake Isabella Dams and Headquarters, with proposals due July 14, 2026 and questions due July 2, 2026 at 11:00 AM PST. The procurement is a Total Small Business set-aside.

Place of performance is Mountain Mesa, CA 93240. The scope spans approximately 37 acres of herbicide treatment across Isabella Main Dam (6 acres), Isabella Auxiliary Dam (19.6 acres), Emergency Spillway (1.4 acres), Headquarters (3.8 acres), and Storage Yard (6.3 acres), plus pest control services to approximately 17,700 square feet of buildings. The contract includes a Base Year with four option years, with work performed seven days per week from sunrise to sunset. Herbicide treatment windows vary by location: Isabella Dam and Auxiliary Dam from February 1–May 31 and October 1–December 1; Headquarters and Storage Yard from March 1–June 30 and November 1–January 1. Pest control treatments occur monthly within the first week.

The contractor must provide all labor, materials, supplies, permits, licenses, equipment, and supervision. All chemicals must comply with federal and state regulations and be applied with blue dye for visibility. No spraying occurs within 24 hours of forecasted rain. The contractor must achieve a minimum 90% effective kill rate as determined by Corps Quality Assurance inspectors and reperform non-conforming work at no additional cost.

Required submittals include general liability and workers' compensation certificates of insurance ($1,000,000 each), state-qualified herbicide applicator licenses (required if the prime contractor performs applications; may be fulfilled by a California-licensed subcontractor), safety hazard analysis, quality control plan, accident prevention plan, monthly exposure reports (Form 94), Material Safety Data Sheets, pesticide use reports, AT-OPSEC training documentation, and E-Verify Program compliance. Service Contract Act prevailing wage applies, with rates determined by Kern County wage determination 2015-5603 (Revision 30, effective May 13, 2026). NAICS 561730 (Landscaping Services); PSC S207 (Housekeeping—Insect/Rodent Control). A pre-bid site visit is strongly recommended but not mandatory.