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  5. ›Fall 2026 Herbicide Release

Tuolumne County·California

Fall 2026 Herbicide Release

Closes 9/23/2026$300k – $500kRequest for Proposal
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Description

The County of Tuolumne is soliciting qualified contractors to perform chemical herbicide release (weed control) on approximately 973 acres of reforested land within the Rim Fire burn scar. Work includes broadcast and directed spray applications of glyphosate‑based herbicide to reduce competing vegetation around planted conifer seedlings, adhering to strict environmental protections (riparian buffers, exclusion zones, limited operating periods, and cultural resource safeguards). Contractors must provide all labor, equipment, chemicals, licensing, insurance, and reporting, and must attend pre‑work kickoff meetings. The project must start upon contract execution and be completed by October 31 2026 (or earlier due to rain, senescence, or other stop‑conditions). The contract term runs through December 31 2026 with possible one‑month extensions.

Attached files

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Contact

Caitlin Henry(Senior Management Analyst)

[email protected]

(209) 533-5511

Key dates

Opened
9/10/2026
Questions due
9/16/2026
Closes
9/23/2026
Projected award
9/24/2026
Duration
3 months

Last updated

Details

Type
Request for Proposal
Industry
Environmental Services
NAICS
561730
Solicitation №
RFP-2025-0147

Budget estimate

$300,000 – $500,000

The solicitation does not disclose a total contract value. Estimating based on the scope: 973 acres at an average application rate of ~45 gallons/acre yields ~43,800 gallons of herbicide. Assuming a market‑average herbicide cost of $2–$4 per gallon plus a $5 per‑tree processing fee (average ~1,200 trees per acre), total material costs could range $200k–$350k. Adding labor, equipment, insurance, and administrative overhead (≈30‑40% of material costs) pushes the likely contract value to roughly $300,000‑$500,000. Factors influencing the final amount include actual gallons used, tree density, travel/access difficulty, and any additional mitigation measures required for protected areas.

AI estimate from the solicitation

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