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ANNUAL REPORT and 2020/21 Pre-Notification for USACE, USFWS and San Diego Regional Water Quality Control Board

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ANNUAL REPORT and 2020/21 Pre-Notification for USACE, USFWS and San Diego Regional Water Quality Control Board 2019/20 ANNUAL REPORT And 2020/21 pre-notification for USACE, USFWS and San Diego Regional Water Quality Control Board USACE Regional General Permit #41: File No. SPL-2008-01079-MLM & USFWS Informal Consultation: FWS-SDG-08B0219-09I0092 File No.: R9-2019-0209 Place ID: 807511 Reg Measure ID: 434433 WDID: 9 000003503 2019/20 ANNUAL REPORT AND WORK PLAN for the California Department of Fish and Wildlife, Region 5 Streambed Alteration Agreement (1600): 1600-2009-0263-R5 San Diego River Watershed Invasive Non-Native Plant Control and Restoration Program San Diego River Conservancy 11769 Waterhill Road Lakeside, CA 92040 Dustin Harrison, Environmental Scientist 619-390-0571 [email protected] July 2020 San Diego River Conservancy: 2019-20 Annual Report for Streambed Alteration Agreement 1 The San Diego River Conservancy (Conservancy) and partner organizations have carried out removal and control of the invasive non-native plant Arundo donax (giant reed) and other target invasive non-native plant species at several sites along the San Diego River and its tributaries under the Conservancy’s Watershed Invasive Non-Native Plant Control and Restoration Program (program). This report serves the dual purpose of a past year annual report as well as the pre- notification requirement for upcoming planned activities. Th report covers restoration activities carried out from summer 2019 (July 1st) through summer 2020 (June 30th) under RGP #41: File No. SPL-2008-01079-MLM. A summary of project activities are provided along with an outline of continuing work and anticipated project areas for fiscal year (FY) 2020/21. The program operates under a United States Army Corp of Engineers (USACE) RGP #41 (File No. SPL-2008-01079-MLM). United States Fish and Wildlife Service (USFWS) issued an informal consultation to the USACE RGP#41 project (FWS-SDG-08B0219-09I0092). Prior to this, Conservancy obtained a Technical Assistance Letter (FWS-SD-2008B0219/2008TA0213). Both documents are consistent with each other and outline the same minimization and avoidance measures. Other permits held by the Conservancy include: California Department of Fish and Wildlife (CDFW) 1602 permit and a California Environmental Quality Act (CEQA) Mitigated Negative Declaration (MND) which has been completed for the program. CDFW has been provided a version of this permit report updating them on work completed in the 2019-2020 as well as planned activities for 2020-21. The maps created for this report separate current projects (purple), from proposed projects (red) and points out the City of San Diego, Public Utilities Department Stadium Wetland Mitigation Project (pink). San Diego River Conservancy: 2019-20 Annual Report for Streambed Alteration Agreement 2 Project #01: East County Arundo Control This restoration project implemented by Lakeside’s River Park Conservancy (LPRC), funded by the Conservancy’s Proposition 1 grant program covers approximately 66 acres along unnamed drainages and tributaries that lead to the San Diego River in Lakeside, California. Arundo stands are being controlled across several private and public parcels through the efforts LRPC. The Conservancy partnered with LRPC in September 2013 to implement this project. Originally funded by the State Coastal Conservancy’s (SCC) Proposition 84 grant program, these restored areas support native habitat, expand wildlife corridors and reduce the risk of flood and fire. All Arundo on site was cut by hand tools or chainsaw, and the cut canes were chipped and removed offsite to a landfill to be used as ground covering. This reporting year, LRPC cut and applied herbicide to 9.22 acres. East County San Diego, Lakeside, CA after Arundo biomass removal Work completed in the past year (2019-20) included: 1) 4.1 acres of new cut zones were biomassed and another 5.12 acres of re-growth were maintained. 2) Site-specific Arundo results: 1.5 acres at Goucho Lane, 1.57 acres at Wyeth Road, 1.7 acres at Toyon Road, 0.38 acre at Oak Creek Road, 0.27 acre at Oak Summit, and 3.58 acres Arundo were biomassed near Highway 8 Business Route. Work planned for the next year (2020-21): 1) LRPC will continue to obtain Right of Entry permits to complete Arundo control in East County San Diego. 2) Work is expected to continue through October 2022. San Diego River Conservancy: 2019-20 Annual Report for Streambed Alteration Agreement 3 Project #02: Restoration of Alvarado Creek, Phase I-III San Diego State University Research Foundation (SDSURF), has received funding from the Conservancy’s Proposition 1 grant program and is restoring the Alvarado Creek near SDSU. At this location, multiple floods have occurred and damaged the office buildings and equipment. Immediately upstream of this location, the City of San Diego dredged and removed invasive plants. This project began in 2015 and continues where the City’s project ended and has removed 2.6 acres invasive plant species, the majority of which are a mixture of fountain grass, wild radish and castor bean. SDSU Research Foundation assessed the area and applied herbicide where necessary. Palms cut, sprayed and coordinates taken for Alvarado Creek Work planned for this year (2019-20) include: 1) No biomass was cut; however, herbicide was applied in the spring. Work planned for the next year (2020-21): 1) Ongoing maintenance. San Diego River Conservancy: 2019-20 Annual Report for Streambed Alteration Agreement 4 Project #03: Rueda Canyon Phase I and II (Tierrasanta) Rueda Canyon totals 72 acres open space owned and managed by the City of San Diego. This project, implemented by San Diego Canyonlands was separated into two phases with Phase I of the Rueda Canyon Project containing an estimated ~10 acres of invasive pampas grass, palms and Myoporum. This phase of the project was closed out during the last cut season. For Phase II of Rueda Canyon, located south of Phase I, ~4 acres are targeted for restoration and enhancement. Funding for both phases were approved by the Conservancy’s Proposition 1 Water Bond Program. Herbicide with blue dye applied to palm tree Work completed in the past year (2019-20) included: 1) Phase I has control of invasive vegetation across 25 acres. 2) Phase II saw the removal of 3 acres (785 lbs.) invasive non-native vegetation including Canary Island date palm, artichoke thistle, prickly lettuce, tocolote thistle, black mustard, horehound, tree tobacco, bristly ox tongue, fennel, smilo grass, Maltese star thistle. 3) 600 ounces of herbicide were applied from September 2019 through June 16, 2020. 4) 1600 palm fronds were removed by volunteers. Work planned for the next year (2020-21): 1) Ongoing maintenance for Phases I and II with support from the Conservancy’s Proposition 1 grant program. San Diego River Conservancy: 2019-20 Annual Report for Streambed Alteration Agreement 5 Project #04 Shepherd Canyon San Diego Canyonlands staff and volunteers of Tierrasanta Canyons conducted habitat restoration and invasive species removal across 25 acres. This reporting season, approximately 0.1 acres of invasive species were removed. The site has been assessed, mapped for future restoration opportunities including erosion control, trail delineation and native plantings. Work completed in the past year (2019-20) included: 1) Approximately 90 lbs. of invasive species were manually removed, including bristly ox tongue, sea lavender, acacia, tamarisk and eucalyptus. 2) Herbicide was applied from September 2019 through March 2020. 3) 25 hookers evening primrose and California mugwort were planted in February 2020. Work planned for the next year (2020-21): 1) Proposal for funding to remove eucalyptus, tamarisk, sea lavender, acacia, Scotch broom, pampas grass, fountain grass, stinkwort, palm tree, and bristly ox tongue. Project #05 Habitat Restoration at Walker Preserve The City of Santee received funding from the Conservancy’s Proposition 1 grant program to restore this previous sand mine operation to a native riparian/upland habitat suitable for migrating birds, aquatic organisms and least Bell’s vireo. A 2.5-acre restoration site contains 65% native plant cover while hand pulling/hand tools and herbicide spot spray-controlled weeds to below <15%. Predominant invasive species targeted are: black mustard, garland chrysanthemum, tree tobacco, castor bean, and stinkwort. Work completed in the past year (2019-20) included: 1) 134 native one-gallon container plants and 25 native trees were installed with temporary irrigation. Work planned for the next year (2020-21): 1) Continued maintenance is expected and quantitative transect data will be collected next year by point-line intercept methods. Walker Preserve native habitat restoration San Diego River Conservancy: 2019-20 Annual Report for Streambed Alteration Agreement 6 Project #06: Lower Sycamore Creek (Phase I and II) Sycamore Creek is a major tributary to the San Diego River in Santee. This project, implemented by Lakeside’s River Park Conservancy, seeks to improve flood conveyance and reduced fire hazards near adjacent homes and is broken into two phases; Phase I in the southern portion with an estimated 3.3 acres of Arundo previously biomassed and hauled off site. Phase II started in 2017 in the northern section and removed approximately 3.5 acres of Arundo, Brazilian pepper tree and pampas grass. Total project area encompasses 26.4 acres. Work completed in the past year (2019-20) included: 1) This season 450 native plants were installed at this site. 2) Herbicide treatment was applied where Arundo re-sprouts are prevalent. Work planned for the next year (2020-21): 1) Work is expected to run through October 2021. Sycamore Creek after non-native vegetation biomass Work completed in the past year (2019-20) included: 1) No biomass work was conducted in Phase II section, only herbicide re-treatment. Work planned for the next year (2020-21): 1) Project site will be monitored and re-treatments scheduled as required. Project #07: Mission Valley Preserve Invasive Removal Of the 51-acre preserve owned and managed by the City of San Diego, 24 acres are targeted for invasive non-native plant removal by the San Diego River Park Foundation (SDRPF).
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