Colusa News: City Approves Wastewater Annexation and Triple Crown Development Plan in 2026

COLUSA NEWS | CITY DEVELOPMENT & ENVIRONMENTAL REVIEW | 2026 — Colusa, Colusa County, California.

The City of Colusa approved an environmental and land-use action in April 2026 involving wastewater treatment plant annexation and a proposed Colusa Triple Crown development. A formal California Environmental Quality Act Notice of Determination states that the City of Colusa approved the project on April 21, with the notice filed April 24.

The size of the proposal

The state filing describes annexation of approximately 695 acres and a special use permit for a cannabis-related development on roughly 89 acres adjacent to the wastewater treatment plant. The document says that the proposed buildout on those 89 acres would occur over eight years and contain 10 structures totaling about 2.13 million square feet.

Other land-use changes

Beyond the special use permit, the action involves changes to the city’s General Plan, zoning and municipal code. That distinction is important: a project combining annexation with a large industrial or agricultural development can alter future land-use boundaries and service responsibilities in ways broader than a single building permit.

Environmental findings and mitigation

According to the Notice of Determination, the city relied on a mitigated or negative declaration, determined no significant environmental impact under the adopted findings, imposed mitigation measures and adopted a monitoring or reporting program. Those formal findings do not mean that all potential effects have disappeared. Residents can review the supporting studies and adopted conditions to understand how traffic, air emissions, water and nearby uses will be monitored.

Approval is not the same as construction

The environmental notice proves an agency approval action occurred. It does not document that all 10 planned structures have been built, that business operations have started, or that full capacity has been reached. With the applicant describing a buildout lasting eight years, the pace of permits, construction and compliance reporting remains newsworthy.

What residents should ask next

Questions include which parcels are included in the annexation, whether the wastewater system will need additional investment, when construction permits are issued, and how mitigation commitments will be checked. Colusa News will follow official records and welcome a range of documented community perspectives without portraying a controversial land-use decision as universally supported or opposed.

Official sources

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