Infestation & Response
- Native to Europe and Asia, Eurasian Watermilfoil was introduced to Lake Tahoe and the Tahoe Keys in the 1980s. No one knows how specifically, but it is likely from home aquarium dumping, or transported accidentally by boat.
- Harvesting begins.
Investigation & Harvesting
- The harvesting and fragment control program continues and grows as the infestation grows.
Research & Coordination
- Initial collaboration with Tahoe Regional Planning Agency and Tahoe Resource Conservation District
- Initial experiments with bottom barriers
- Comprehensive literature research on control methods
- Informational consultations with Lahontan Regional Water Quality Control Board, Lake
Tahoe Aquatic Invasive Species Coordinating Committee and others
- Waste Discharge Requirement (WDR) Permit issued in 2014, necessitating
Integrated Management Plan and Nonpoint Source Water Quality Management Plan.
Research & Collaboration
- Education and outreach to homeowners, landscaping companies and other land owners for Nonpoint Source Plan
- Independent Scientific Panel review of Integrated Management Plan
- Fragment Control method evaluation including new boats, boat backup station
- Alternative methods research and field study
- Water quality monitoring and study
- Collaboration with stakeholders in planning process, including the Lake Tahoe Water
Suppliers Association, League to Save Lake Tahoe, Sierra Club, Tahoe
Resource Conservation District, Tahoe Regional Planning Agency, Lahontan
Regional Water Quality Control Board
Implementation, demonstration & evaluation
- Small-scale herbicide test followed by non-herbicide methods pending approval (2018-2020)
- Non-herbicide combination methods evaluation pending funding (diver assisted pulling, broader bottom barrier use) 2017-2019
- Long-term Integrated Management Plan (2020)