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Overview
Basics
Basics
The Control Methods Test was approved by TRPA and Lahontan in January 2022, and implementation of the full test- ultraviolet light, aquatic herbicides and other non-herbicidal methods- began in May of 2022. In addition to the test treatment methods, extensive monitoring is being conducted to follow herbicide degradation, water quality conditions, and efficacy of treatment methods.
Implementation
2017
2022
2025
$12,000,000
Emily Frey (efrey@trpa.gov)
05/13/2016
01/25/2024
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| Location Information | Location Notes |
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Organizations
Organizations
EIP Details
EIP Basics
EIP Basics
01.03.01.0006 - Tahoe Keys Lagoon Aquatic Weeds Control Methods Test Implementation
This project is on the EIP 5-year list.
Performance Measures
Expected Performance Measures
Expected Performance Measures
| Acres of Habitat Restored or Enhanced | [Action Performed: Enhanced] | acres | |
| Acres Treated for Invasive Species | [Invasive Species Type: Aquatic] | acres |
Reported Performance Measures
Reported Performance Measures
| Acres Treated for Invasive Species | ||||
|---|---|---|---|---|
| 2022 | 2023 | Total | Units | |
| Invasive Species Type | ||||
| Aquatic | 41.5 | 27.67 | 69.17 | acres |
| Total | 41.5 | 27.67 | 69.17 | acres |
Funding
Expected Funding
Expected Funding
$12,000,000
$10,300,000
$1,700,000
($2,000,000 identified as )
| Total | |||
|---|---|---|---|
| Lake Tahoe Restoration Act (USFWS) | $9,000,000 | $8,000,000 | $1,000,000 |
| Tahoe Keys Property Owners Association (TKPOA) | $3,300,000 | $2,300,000 | $1,000,000 |
| Grand Total | $12,300,000 | $10,300,000 | $2,000,000 |
Reported Expenditures
Reported Expenditures
| Total | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|
| Lake Tahoe Restoration Act | $5,408,826 | $1,842,266 | $3,066,560 | $500,000 | $0 | $0 | $0 | $0 |
| Tahoe Keys Property Owners Association | $3,215,000 | $700,000 | $2,515,000 | $0 | $0 | $0 | $0 | $0 |
| Grand Total | $8,623,826 | $2,542,266 | $5,581,560 | $500,000 | $0 | $0 | $0 | $0 |
Photos
Tahoe Keys Treatment and Monitoring locations
(Timing: Before) (~204 KB)
Tahoe Keys Lagoons infested with Eurasian Watermilfoil
(Timing: Before) (~161 KB)
Tahoe Keys CMT Test sites and monitoring locations
(Timing: During) (~325 KB)
Year 2 (2023) Treatment Map - Tahoe Keys Control Method Test
(Timing: During) (~194 KB)
Other Details
Watersheds
No watersheds set for this project.
Threshold Categories
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Removal of AIS will contribute to improved fish habitat within Lake Tahoe for native fish and reduce habitat for invasive fish which prey on native fish and disrupt the natural food chain.
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This project will improve water quality by removing aquatic invasive plants, a known contributor to decreased lake clarity.
Local and Regional Plans
Related Projects
Related Projects
01.03.01.0006 - Tahoe Keys Lagoon Aquatic Weeds Control Methods Test Implementation is associated with following groups of projects.
External Links
Notes
Notes
| 01/11/2024 3:17 PM | Emily Frey | Non-herbicide (“Group B”) treatments began in June 2023 including UV light, bottom barriers, diver assisted hand removal, and laminar flow aeration. No aquatic herbicides were used in 2023. Extensive monitoring of biovolume, plant species present, nutrients, benthic macroinvertebrates and general water quality parameters were conducted from May to November. Preliminary efficacy results for Year 2 (2023) are encouraging. Group B (all non-herbicide) treatment methods will continue in Year 3 as will associated monitoring. The first annual report (Year 1) was submitted on March 15, 2023, and is available online. The second annual report (Year 2) is due to TRPA and Lahontan on March 15, 2024. |
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| 07/14/2023 11:47 AM | Dennis Zabaglo | The CMT project information was updated to include funding by TKPOA in support of the LFA component of the CMT. The Tahoe Keys LFA pilot project is now complete, however, implementation of LFA will continue with performance and expenditures being captured under the CMT project starting with 2022 data. | ||
| 01/25/2023 10:27 AM | Dennis Zabaglo | Treatments with aquatic herbicides and UV light began in May 2022. One of the required mitigations was the use of double turbidity curtains to ensure herbicide migration would not reach Lake Tahoe proper. These curtains worked as intended as the extensive monitoring demonstrated no herbicides reached the West Channel leading to the lake. Monitoring included herbicide migration and degradation, nutrients, and general water quality parameters, as well is efficacy of treat methods. Preliminary efficacy results are encouraging and are informing what Group B (all non-herbicide) methods will be used and where, in 2023. The first annual report is due to TRPA and Lahontan on March 15, 2023. |
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| 01/19/2021 10:40 AM | Beth Vollmer | Formally named "Tahoe Keys Aquatic Invasive Plant Control". |