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Overview
Basics
Basics
This site is identified in the 2019 Lake Tahoe Region AIS Action Agenda as a Tier 1 priority for treatment. Aquatic invasive plant control at this site commenced in September 2020. Diver-assisted suction removal has been the primary method of plant control thus far. In September 2023, an aquatic invasive species, New Zealand mudsnail (Potamopyrgus antipodarum), was detected by contracted divers within the project area. Work was paused to reduce risk of spread of this species.
Implementation
2019
2020
2030
$2,500,000
Mollie Hurt (mhurt@tahoercd.org)
01/19/2021
01/22/2024
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| Location Information | Location Notes |
|---|---|
Organizations
Organizations
EIP Details
EIP Basics
EIP Basics
01.03.01.0034 - Tahoe Keys Offshore Aquatic Invasive Plant Control Project
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], [Habitat Type: Lake] | 104 | acres |
| Acres Treated for Invasive Species | [Invasive Species Type: Aquatic] | 104 | acres |
| Acres of Invasive Species Inventoried | [Invasive Species Type: Aquatic] | 104 | acres |
Reported Performance Measures
Reported Performance Measures
| Acres Treated for Invasive Species | ||||||
|---|---|---|---|---|---|---|
| 2020 | 2021 | 2022 | 2023 | Total | Units | |
| Invasive Species Type | ||||||
| Aquatic | 1.6 | 3.3 | 3.3 | 0.6 | 8.8 | acres |
| Total | 1.6 | 3.3 | 3.3 | 0.6 | 8.8 | acres |
| Acres of Invasive Species Inventoried | ||||||
|---|---|---|---|---|---|---|
| 2020 | 2021 | 2022 | 2023 | Total | Units | |
| Invasive Species Type | ||||||
| Aquatic | 120 | 3.5 | 258.2 | 284.6 | 666.3 | acres |
| Total | 120 | 3.5 | 258.2 | 284.6 | 666.3 | acres |
Funding
Expected Funding
Expected Funding
$2,500,000
$989,324
$1,510,676
| Total | |||
|---|---|---|---|
| Lake Tahoe Restoration Act (TRPA) | $464,324 | $464,324 | $0 |
| League to Save Lake Tahoe (League) | $25,000 | $25,000 | $0 |
| SB630 Funds (CTC) | $500,000 | $500,000 | $0 |
| Grand Total | $989,324 | $989,324 | $0 |
Reported Expenditures
Reported Expenditures
| Total | 2023 | 2022 | 2021 | 2020 | 2019 | |
|---|---|---|---|---|---|---|
| Lake Tahoe Restoration Act | $312,268 | $20,000 | $156,181 | $40,767 | $95,320 | $0 |
| League to Save Lake Tahoe | $25,000 | $0 | $0 | $0 | $25,000 | $0 |
| SB630 Funds | $482,192 | $37,341 | $180,193 | $246,658 | $18,000 | $0 |
| Grand Total | $819,460 | $57,341 | $336,374 | $287,425 | $138,320 | $0 |
Photos
Aerial View of West Channel of Tahoe Keys Complex, South Lake Tahoe, CA, July 2020.
(Timing: Before) (~1,005 KB)
Diver-assisted suction removal control work at Tahoe Keys Offshore in 2022.
(Timing: After) (~974 KB)
Aerial View of West Channel of Tahoe Keys Complex, South Lake Tahoe, CA, October 2020.
(Timing: During) (~930 KB)
Dive team offshore of the West Channel of the Tahoe Keys implementing diver-assisted suction removal.
(Timing: During) (~619 KB)
Under water dive Site Assessment was carried out in June 2022.
(Timing: After) (~711 KB)
Dive team offshore of Tahoe Keys, South Lake Tahoe, CA, May 2021
(Timing: During) (~342 KB)
Diver-assisted suction control work at Tahoe Keys Offshore is shown by day for 2020 and 2022.
(Timing: After) (~1,198 KB)
Underwater aquatic invasive plants, Tahoe Keys Offshore Complex, South Lake Tahoe, CA, June 2021
(Timing: During) (~767 KB)
Diver-assisted suction removal at Tahoe Keys Offshore Complex, South Lake Tahoe, CA, August 2021
(Timing: During) (~406 KB)
Initial detection of New Zealand mudsnail (Potamopyrgus antipodarum) discovered by Marine Taxonomic Services, LTD. divers, South Lake Tahoe, CA, September 6, 2023.
(Timing: During) (~560 KB)
New Zealand mudsnail on lakebed of Lake Tahoe, South Lake Tahoe, CA, September 2023.
(Timing: During) (~1,272 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
No Related Projects set for this project.
External Links
No external links entered.
Notes
Notes
| 01/16/2024 8:49 AM | Mollie Hurt | In 2023, a complete site assessment survey was conducted for this infestation and dive contractor completed full mobilization of crews and equipment to begin work. One day of diver-assisted suction was conducted before New Zealand mudsnails were detected immediately adjacent to the project area. A grid survey of the offshore area was conducted, and all plant removal operations that could disturb or spread New Zealand mudsnail were paused. | ||
| 05/24/2023 1:43 PM | Beth Vollmer | Previously name Tahoe Keys Complex (Offshore) Aquatic Invasive Plant Control Project |