View: Public Webinar on Results from 3-year Control Methods Test, July 18, 2025

• Slide Presentation of CMT Results
• Tahoe Science Advisory Council Peer Review of CMT Results
• TKPOA CMT Draft Final Summary Report, April 2025

2026 Containment Plan for the Tahoe Keys

A containment plan for the entirety of the Tahoe Keys is being implemented in 2026, developed by the collaborative partnership and stakeholders. This plan is intended to reduce the spread of aquatic invasive plant fragments and reduce biomass in priority areas.

Control Methods Test Implementation Reports

TKPOA CMT Draft Final Summary Report, April 2025 *additional appendices available by emailing dzabaglo@trpa.gov due to large file sizes.

• • Tahoe Science Advisory Council Peer Review of CMT Results

Tahoe Keys Lagoons Aquatic Weed Control Methods Test: Annual Report – Year 3, February 2025

• • Main Takeaways from Year 3 Control Methods Test
  • Summer 2024 CMT Implementation Special Report, October 2024

Tahoe Keys Lagoons Aquatic Weed Control Methods Test: Annual Report – Year 2, March 2024 *additional appendices available by emailing dzabaglo@trpa.gov due to large file sizes.

• • Tahoe Keys Lagoons Annual Macrophyte Control Efficacy Monitoring Report – Year 2 (Appendix E.), March 2024
  • Main Takeaways from Year 2 Control Methods Test
  • Summer 2023 CMT Implementation Special Report, October 2023

Tahoe Keys Lagoons Aquatic Weed Control Methods Test: Annual Report – Year 1, March 2023 *additional appendices available by emailing dzabaglo@trpa.gov due to large file sizes.

• • Tahoe Keys Lagoons Annual Macrophyte Control Efficacy Monitoring Report – Year 1 (Appendix E.), March 2023
  • Tahoe Keys Lagoons Aquatic Weed Control Methods Test Year 1 Preliminary Results, February 2023
  • Summer 2022 CMT Implementation Special Report, September 2022

Project Approved

• Lahontan Water Quality Control Board Staff Presentations and Public Comment Lahontan Board Meeting January 12, 2022
• Lahontan Water Quality Control Board Deliberation Lahontan Board Meeting January 13, 2022
• TRPA Advisory Planning Commission Meeting January 18,2022
• TRPA Governing Board Meeting January 26, 2022

Environmental Impact Report/Statement

The Lahontan Water Board and Tahoe Regional Planning Agency (TRPA) have prepared a Final Environmental Impact Report/Environmental Impact Statement (FEIR/FEIS) for the Tahoe Keys Lagoons Weed Control Methods Test.  The FEIR/FEIS includes responses to comments submitted on the Draft Environmental Impact Report/Environmental Impact Statement in sections 2 and 3. The complete FEIR/FEIS is comprised of four separate files and can be viewed by clicking on the links below:

1. FEIR/FEIS for the Tahoe Keys Aquatic Weed Control Methods Tests
2. FEIR/FEIS Appendix A – Written Comments Received during Public Review
3. FEIR/FEIS Appendix B – Mitigation Monitoring and Reporting Program
4. FEIR/FEIS Appendix C – Draft Environmental Impact Report/Environmental Impact Statement

PROJECT OVERVIEW

Updated Tahoe Keys Weeds Project Overview Presentation

• Take a Virtual Tour of the Keys to learn about the weeds problem and what is currently happening to address it.
• Watch this short video to see more of the aquatic weeds problem and some of the management work to address it.
• Learn more about what causes weed growth in the Tahoe Keys HERE.

ADDITIONAL PROJECT DOCUMENTS + NOTICES

• Tahoe Keys Lagoons Aquatic Weed Control Methods Test Tentative Resolution, Tentative Permit, Draft Documents
• Tahoe Keys Lagoons Aquatic Weed Control Methods Test DRAFT EIR/EIS
• Tahoe Keys Lagoons Aquatic Weed Control Methods Test Appendix A-H: Notice of Preparation and Public Engagement Plan for Scoping
• Notice of Availability: Notice of Public Comment Period and Hearings for the Draft EIR/EIS for the Tahoe Keys Lagoons Aquatic Weed Control Methods Test
• Updated Basin Plan Exemption Application and Updated Control Methods Test Application to reduce aquatic invasive species in the Tahoe Keys lagoons submitted by TKPOA April 2021.
• Scoping Report Tahoe Keys Aquatic Weed Control Methods Test, October 31, 2019
• Notice of Preparation for the Tahoe Keys Lagoons Aquatic Weed Control Methods Test, June 17, 2019
• Project Description for the Tahoe Keys Lagoons Aquatic Weed Control Methods Test, June 10, 2019