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HomeMy WebLinkAbout05.22.26 Board Correspondence - FW_ Environmental and Recreational Compliance Report submitted in FERC P-619-000 by Pacific Gas and Electric Company1From:Clerk of the Board To:Clerk of the Board; Connelly, Bill; Cook, Holly; Cook, Robin; Durfee, Peter; Jessee, Meegan; Kimmelshue, Tod; Kitts, Melissa; Krater, Sharleen; Lee, Lewis; Little, Melissa; Pickett, Andy; Ritter, Tami; Stephens, Brad J.; Sweeney, Kathleen; Teeter, Doug; Zepeda, Elizabeth Cc:Loeser, Kamie; Cannon, Jamie Subject:Board Correspondence - FW: Environmental and Recreational Compliance Report submitted in FERC P-619-000 by Pacific Gas and Electric Company Date:Tuesday, May 26, 2026 7:40:39 AM Please see Board Correspondence - Lewis Lee Administrative Technician - Confidential Butte County Administration 25 County Center Drive, Suite 200 • Oroville, CA 95965 T: 530.552.3326 www.buttecounty.ca.gov | lelee@buttecounty.ca.gov -----Original Message----- From: 'FERC eSubscription' <eSubscription@ferc.gov> Sent: Friday, May 22, 2026 1:46 PM Subject: Environmental and Recreational Compliance Report submitted in FERC P-619-000 by Pacific Gas and Electric Company .ATTENTION: This message originated from outside Butte County. Please exercise judgment before opening attachments, clicking on links, or replying.. On 5/22/2026, the following Filing was submitted to the Federal Energy Regulatory Commission (FERC), Washington D.C.: Filer: Pacific Gas and Electric Company Docket(s): P-619-000 Lead Applicant: Pacific Gas and Electric Company Filing Type: Environmental and Recreational Compliance Report Description: Pacific Gas and Electric Company submits 2025 Aquatic Invasive Species Plan Report re the Bucks Creek Hydroelectric Project under P-619. 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Box 28209 Oakland, CA 94604 May 22, 2026 Via Electronic Submittal (E-File) Debbie-Anne Reese, Secretary Federal Energy Regulatory Commission Division of Hydropower Administration and Compliance 888 First Street, NE Washington, D.C. 20426 RE: Bucks Creek Hydroelectric Project, FERC No. 619-CA 2025 Aquatic Invasive Species Plan Report Dear Secretary Reese: This letter presents the 2025 Aquatic Invasive Species Monitoring Report (Report) for Pacific Gas and Electric Company’s (PG&E) Bucks Creek Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No. 619. FERC issued a new license for the Bucks Creek Project on June 16, 2022. License Article 401(a) requires the licensees to implement resource protection plans required by State Water Resources Control Board (SWRCB) 401 Water Quality Certification (WQC) conditions and U.S. Department of Agriculture, Forest Service’s (“Forest Service”) section 4(e) conditions with the Commission. WQC Condition 17 and Forest Service section 4(e) Condition No. 44 require the Aquatic Invasive Species (AIS) Management Plan. In accordance with the approved AIS Plan, PG&E began implementing the Plan in License Year 1 (2023), the first full calendar year after license issuance. PG&E provided a Draft Aquatic Invasive Species Report to the Forest Service, SWRCB, California Department of Fish and Wildlife (CDFW), and United States Fish and Wildlife Service (USFWS) by email on March 2, 2026. A review and comment period of more than 60 days was provided. Comments submitted by CDFW and Forest Service staff were addressed by PG&E in response to comments table which is included as Attachment A of Enclosure 1. No additional feedback was received from other agencies. The final Report is provided in (Enclosure 1). Documentation of agency consultation is provided in (Enclosure 2). For questions, please contact Trevor Moore, senior license coordinator for PG&E, at (530) 205-7345. Sincerely, Trevor Moore Senior Hydroelectric License Coordinator Enclosures: 1. 2025 Aquatic Invasive Species Report 2. Consultation Record cc: See Attached List Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Debbie-Anne Reese, Secretary May 22, 2026 Page 2 cc: via email w/enclosures Bryan Muro (SWRCB) – Bryan.muro@Waterboards.ca.gov Nathan Fisch (SWRCB) – Nathan.fisch@waterboards.ca.gov Leslie Edlund (Forest Service) – Leslie.edlund@usda.gov Erika Brenzovich (Forest Service) – Erika.brenzovich@usda.gov Kurt Sable (Forest Service) – Kurt.sable@usda.gov Dawn Alvarez (Forest Service) - Dawn.alvarez@usda.gov Leigh Bartoo (USFWS) - Aondrea_Bartoo@fws.gov Michael Maher (CDFW) – Michael.Maher@wildlife.ca.gov Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Enclosure 1 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 PACIFIC GAS AND ELECTRIC COMPANY AND THE CITY OF SANTA CLARA Bucks Creek Hydroelectric Project FERC Project No. 619 2025 Aquatic Invasive Species Monitoring Report – Final May 2026 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 This Page Intentionally Left Blank Document Accession #: 20260522-5242 Filed Date: 05/22/2026 PACIFIC GAS AND ELECTRIC COMPANY AND THE CITY OF SANTA CLARA Bucks Creek Hydroelectric Project FERC Project No. 619 2025 Aquatic Invasive Species Monitoring Report Final May 2026 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 This Page Intentionally Left Blank Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page i Contents Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Bucks Creek Hydroelectric Project FERC Project No. 619 2025 Aquatic Invasive Species Monitoring Report TABLE OF CONTENTS SECTION 1.0 INTRODUCTION........................................................................................ 1-1 1.1 Background............................................................................................................... 1-1 1.2 Project Location and Feature Description ............................................................... 1-1 1.3 Purpose ..................................................................................................................... 1-2 1.4 Aquatic Invasive Species ......................................................................................... 1-2 SECTION 2.0 METHODS ................................................................................................... 2-1 2.1 Focal Species Monitoring ........................................................................................ 2-1 2.1.1 Quagga and Zebra (Dreissenid) Mussel Monitoring ............................... 2-1 2.1.2 Crayfish Monitoring................................................................................. 2-3 2.1.3 Other Focal AIS Monitoring .................................................................... 2-4 2.2 Incidental Observations ............................................................................................ 2-6 2.3 Data from online AIS databases .............................................................................. 2-7 SECTION 3.0 MONITORING RESULTS ......................................................................... 3-1 3.1 Focal Species Monitoring Results ........................................................................... 3-1 3.1.1 Quagga and Zebra (Dreissenid) Mussels ................................................. 3-1 3.1.2 Crayfish .................................................................................................... 3-1 3.1.3 Other Focal Species ................................................................................. 3-1 3.1.4 Incidental Observations ........................................................................... 3-1 3.1.5 Aquatic Invasive Species Database Review ............................................ 3-3 SECTION 4.0 DISCUSSION ............................................................................................... 4-1 4.1 Invasive Mussels ...................................................................................................... 4-1 4.1.1 Quagga and Zebra (Dreissenid) Mussels ................................................. 4-1 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Contents Page ii May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara 4.1.2 Golden Mussel (Moliolid) Mussels ......................................................... 4-1 4.2 Crayfish .................................................................................................................... 4-2 4.3 Other Focal Species .................................................................................................. 4-2 4.4 Variances from the Monitoring Plan ....................................................................... 4-3 SECTION 5.0 REFERENCES ................................................................................................ 1 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page iii Contents Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara LIST OF ATTACHMENTS Attachment A Response to Comments on Agency Review Draft Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Contents Page iv May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara LIST OF TABLES Table 1. Conditions of low, marginal, and high calcium (Ca) and pH that are Unable, Potentially Able, and Able to support dreissenid mussels (from Claudi and Prescott 2011), and vulnerability assessment/level of risk for waterbodies exhibiting described water quality characteristics. ....................... 2-2 Table 2. Risk-based dreissenid mussel monitoring schedule for Licensees’ lakes and reservoirs. ................................................................................................... 2-2 Table 3. Water quality parameters collected during quagga/zebra mussel monitoring. ........................................................................................................ 2-3 Table 4. Location of Bucks Creek Project (FERC Project No. 619) stream fish/crayfish monitoring sites, 2023. ................................................................. 2-3 Table 5. Location of Bucks Creek Project (FERC Project No. 619) benthic macroinvertebrate and monitoring sites and aquatic invasive species eDNA sample sites, 2023. ................................................................................. 2-5 Table 6. Locations of Bucks Creek Project (FERC Project No. 619) Sierra Nevada yellow-legged frog/aquatic invasive species eDNA monitoring sites. .................................................................................................................. 2-6 Table 7. Environmental DNA samples collected, and total volume filtered, and detection results for Sierra Nevada yellow-legged frog and aquatic invasive species at Sierra Nevada yellow-legged frog monitoring sites, Bucks Creek Project (FERC Project No. 619), 2025. ....................................... 3-2 Table 8. Non-indigenous species documented in the Milk Ranch Creek (including Three Lakes), Bucks Creek (including Bucks Lake and Lower Bucks Lake), and Grizzly Creek (including Grizzly Forebay) watersheds, Plumas Co., CA, from the USGS Non-Indigenous Aquatic Species (NAS) database, January 29, 2026. ................................................................... 3-4 Table 9. Habitat requirements for golden mussel (source USGS 2026). ........................ 4-2 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 1-1 Section 1.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara SECTION 1.0 Introduction 1.1 Background Pacific Gas and Electric Company (PG&E) and the City of Santa Clara (City) received a new license for the Bucks Creek Hydroelectric Project (FERC Project No. 619) (Project) on June 16, 2022. The new license establishes the conditions under which the Project must be operated. Among those conditions is Article 401 which requires PG&E and the City to implement 13 management or monitoring plans, including the Aquatic Invasive Species Management Plan (Plan) which is also required by Water Quality Certification Condition 17 and US Forest Service Condition 44. Elements of this plan were filed with PG&E’s Final License Application on December 12, 2016 pending further consultation with the stakeholders, and the final Plan was submitted to FERC in a supplemental filing on September 20, 2019. This plan was approved by FERC in the new license. In accordance with the approved Plan, PG&E began implementing the Plan in License Year 1 (2023), the first full calendar year after license issuance. This report and its attachments document the results of the 2025 monitoring. 1.2 Project Location and Feature Description The Project is located entirely within Plumas County, California in the Sierra Nevada Mountains, approximately 17 miles (27 kilometers [km]) southwest of the community of Quincy. The Project consists of two developments that combined contain four dams, four reservoirs, two powerhouses, and associated facilities. The Bucks Creek Development was completed in 1928 and includes Lower and Middle Three Lakes, Lower Bucks Lake, Bucks Lake, Grizzly Forebay, and Bucks Powerhouse. The Grizzly Development, which was completed in 1993, added the Grizzly Tunnel and Grizzly Powerhouse to the Project. Bucks Lake Dam is located on Bucks Creek and impounds Bucks Lake. From Bucks Lake, the Project’s water flow is released immediately downstream into Lower Bucks Lake, which is impounded by Lower Bucks Dam. Three Lakes Dam impounds the flow of Milk Ranch Creek at Middle Lake and Lower Lake. These water bodies, along with Upper Lake, are hydraulically connected and collectively known as Three Lakes Reservoir. Milk Ranch Conduit conveys the Project’s water flow from Three Lakes Reservoir and feeder diversions to Lower Bucks Lake. The Grizzly Powerhouse Tunnel conveys the water flow from Lower Bucks Lake to Grizzly Powerhouse. The powerhouse discharges the flow into Grizzly Forebay, which is impounded by Grizzly Forebay Dam. From Grizzly Forebay, the Project’s water flow is conveyed through the Grizzly Forebay Tunnel to Bucks Creek Powerhouse, which discharges the Project’s water flow into the North Fork Feather River (NFFR), upstream of Rock Creek Powerhouse, part of PG&E’s Rock Creek-Cresta Hydroelectric Project (FERC Project No. 1962). Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 1.0 Page 1-2 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara 1.3 Purpose This report documents the third year of AIS monitoring program (including incidental observations during coordinated monitoring efforts) under the new FERC license for the Bucks Creek Project. The monitoring program, in part, is intended to ensure early detection of AIS. Any incidental observations of AIS encountered during field surveys will also be documented in the report. 1.4 Aquatic Invasive Species The FERC-approved Bucks Creek Aquatic Invasive Species Management Plan included BMPs to prevent the introduction of AIS into Project-affected waters, and to provide early detection monitoring and monitoring for focal AIS populations. Focal AIS include species that occur or have the potential to be introduced into Project-affected waters within the Bucks Creek Project include: • Whirling Disease vector (Myxobolus cerebralis), • Ceratonova shasta, • Tetracapsuloides bryosalmonae, • Ichthyophthirius multifiliis, • Batrachochytrium dendrobatidis, • Ranavirus (Frog virus 3), • quagga mussels (Dreissena bugensis), • zebra mussels (D. polymorpha), • New Zealand mudsnail (Potamopyrgus antipodarum), • Asian clam (Corbicula fluminea), • signal crayfish (Pacifastacus leniusculus), • virile crayfish (Orconectes virilus), • American bullfrog (Lithobates catesbeianus), • curly leaf pondweed (Potamogeton crispus), • Eurasian milfoil (Myriophyllum spicatum), • Hydrilla (Hydrilla verticillata), • Brazilian waterweed (Egeria densa), • parrot’s feather milfoil (Myriophyllum aquaticum), • water primrose (Ludwigia spp.), and • didymo (Didymosphenia geminata). Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 1-3 Section 1.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara 1.5 Comments Received An agency draft of this report was circulated to stakeholders on March 2, 2025. The 2025 AIS Report was discussed during the annual Ecological Consultation Group meeting on March 25, 2025. Comments on the report were received from the California Department of Fish and Wildlife and the Plumas National Forest. These comments were reviewed and addressed as described in Attachment A - Response to Comments on Agency Review Draft. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 2-1 Section 1.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara SECTION 2.0 Methods 2.1 Focal Species Monitoring The first year of AIS monitoring under the new license was conducted in 2023 and included quagga and zebra mussel monitoring consisting of surface surveys, a water quality profile, calcium sampling, and veliger tows. Water quality monitoring will determine the scope and frequency of future monitoring during the license term. Monitoring for crayfish and other focal species was implemented in parallel with other aquatic species monitoring for efficiency. In brief, the crayfish monitoring was conducted at the stream fish population monitoring sites and other focal species monitoring was implemented in parallel with benthic macroinvertebrate (BMI) and Sierra Nevada yellow-legged frog monitoring. 2.1.1 Quagga and Zebra (Dreissenid) Mussel Monitoring The type, location, and intensity of monitoring at each reservoir was determined in 2023 by the vulnerability assessment completed for the Project reservoirs (PG&E et al. 2019a). Using Project and local watershed data and the water quality thresholds for supporting dreissenid mussels examined by Claudi and Prescott (2011), the assessment will determine the vulnerability of Project reservoirs to infestation and monitoring schedule (Tables 1 and 2, respectively). Calcium samples were collected from the surface, mid-water, and bottom of each Project reservoir profile and sent to a laboratory for analysis (Table 3). Water quality profiles were collected in situ using a multiparameter probe (e.g., HYDROLAB) and include water temperature, dissolved oxygen, pH, turbidity, and conductivity (Table 3). The vulnerability to infestation for Project waterbodies is assessed as “High,” “Moderate,” “Low,” or “None” using water quality parameter thresholds (i.e., calcium concentration and pH) essential to supporting the survival of quagga and zebra mussels (Claudi and Prescott 2011). Based on this vulnerability, the scope and schedule of quagga and zebra (dreissenid) mussel monitoring was determined (Table 3-3). Monitoring may consist of surface surveys, artificial substrate monitoring, and/or plankton tow sampling utilizing the most current CDFW protocols (available online at https://www.wildlife.ca.gov/Conservation/Invasives/Quagga-Mussels). The monitoring schedule can vary from annual monthly monitoring June through September (High risk; Ca > 15 ppm [15 mg/L] and pH > 7.8) to every 10 years (risk rated as None; Ca ≤ 12 ppm [12 mg/L] and pH ≤ 7.3). Monitoring will be conducted at Project reservoirs where recreational, boating, or fishing activities are permitted, which includes Bucks Lake, Lower Bucks Lake, Grizzly Forebay, and Three Lakes. As appropriate, new water quality data for the Project will be reviewed as it becomes available. The vulnerability assessment may be updated using this information and/or any new scientific findings on the biological requirements and tolerances of quagga and zebra mussels. Any updates to the vulnerability assessment and quagga and zebra mussel monitoring updates will be provided in the annual AIS report to the Resources Agencies. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 2.0 Page 2-2 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 1. Conditions of low, marginal, and high calcium (Ca) and pH that are Unable, Potentially Able, and Able to support dreissenid mussels (from Claudi and Prescott 2011), and vulnerability assessment/level of risk for waterbodies exhibiting described water quality characteristics. pH Calcium Concentration Ca ≤ 12 mg/L 12 mg/L< Ca ≤ 15 mg/L Ca > 15 mg/L pH ≤ 7.3 Unable/ None Unable/ Low Unable/ Low 7.3 < pH ≤ 7.8 Unable/ Low Potentially Able/ Moderate Potentially Able/ Moderate pH > 7.8 Unable/ Low Potentially Able/ Moderate Able/ High Table 2. Risk-based dreissenid mussel monitoring schedule for Licensees’ lakes and reservoirs. Risk Parameters1 Periodicity Frequency Timing 1. High (Able to support dreissenid mussels) • Mussel monitoring − Surface − veliger − artificial substrate • WQ monitoring annual monthly • low elevation waters (<4,500 ft): Apr - Nov • high elevation waters (>4,500 ft): May- Oct 2. Moderate (Potentially Able to support dreissenid mussels) • Mussel monitoring − surface − veliger2 − artificial substrate • WQ monitoring every 2 years monthly • low elevation waters (<4,500 ft): Apr - Nov • high elevation waters (>4,500 ft): May - Oct 3. Low (Unable to support dreissenid mussels) • Mussel monitoring − surface − veliger2 • WQ monitoring every 5 years 2x per sample year (spring and fall) Jun or Jul and Sep or Oct 4. None (Unable to support dreissenid mussels) • Mussel monitoring − surface − veliger2 • WQ monitoring every 10 years 2x per sample year (spring and fall) Jun or Jul and Sep or Oct 1 Surface monitoring will include docks, mooring lines, buoys, boat ramps, shoreline concrete structures, woody debris, etc. 2 Veliger sample collection and analysis is no longer supported from waterbodies with calcium concentrations less than 15 mg/L (Attachment A). Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 2-3 Section 2.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 3. Water quality parameters collected during quagga/zebra mussel monitoring. Constituent Method Minerals In-Situ 2.1.2 Crayfish Monitoring Crayfish monitoring in Project-affected streams was concurrent with the Aquatic Monitoring Plan’s Stream Fish Population Monitoring (see Bucks Creek Aquatic Resources Monitoring Plan for Stream Fish Population Monitoring schedule; PG&E et al. 2019b). Sample locations are shown in Table 4. Table 4. Location of Bucks Creek Project (FERC Project No. 619) stream fish/crayfish monitoring sites, 2023. Site ID Location Description Location Coordinates (decimal degrees) Upstream Downstream F-MRC-0.521 Milk Ranch Creek upstream of the NFFR confluence N/A N/A F-MRC-0.301 Milk Ranch Creek upstream of the NFFR confluence 39.958894, -121.274778 39.95951, -121.274299 F-BC-7.172 Bucks Creek downstream of Lower Bucks Lake Dam 39.903417, -121.229961 39.904215, -121.230802 F-BC-1.98 Bucks Creek accessed via Tobin Trail 39.91564, -121.299803 39.914103, -121.299950 F-GC-7.03 Grizzly Creek downstream of Grizzly Forebay Dam 39.888001, -121.295852 39.888372, -121.296392 F-GC-2.891 Grizzly Creek upstream of the Wildcat Creek confluence N/A N/A Notes: NFFR – North Fork Feather River N/A – Not applicable 1 Sites F-MRC-0.52 and F-GC-2.89 were not sampled in 2023, 2024, or 2025 as wildfires destroyed the access trails to them and these trails have not been restored. Site F-MRC-0.52 was relocated to F-MRC-0.30. There was no alternative site located for site F-GC-2.89. 2 Site F-BC-7.17 was separated into two non-contiguous segments (upper segment and lower segment), consistent with the 2015 site boundaries, due to a deep pool and large logjam in the channel that prevented effective sampling. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 2.0 Page 2-4 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Any crayfish observed and/or captured will be identified to species and enumerated, where possible; a subsample of captured crayfish representative of the species will be photographed. 2.1.3 Other Focal AIS Monitoring Environmental DNA (eDNA) sampling for the following species was conducted within Project stream reaches concurrent with the Aquatic Monitoring Plan’s BMI Population Monitoring (PG&E et al. 2019b)(Table 5), and at tributaries to Project Bucks Lake and Grizzly Forebay concurrent with the Sierra Nevada Yellow-legged Frog Management Plan monitoring surveys (PG&E et al. 2019c)(Table 6) using available genetic assays: • Myxobolus cerebralis (whirling disease; Barry et al. 2021) • Ceratonova shasta (myxosoporean parasite; Hallett et al. 2006) • Tetracapsuloides bryosalmonae (proliferative kidney disease [or PKD]; Hutchins et al. 2017) • Ichthyophthirius multifiliis (white spot; Hu et al. 2022) • Batrachochytrium dendrobatidis (Bd or chytrid; Boyle et al. 2004) • Iridoviridae sp. (ranavirus or frog virus 3; Leung et al. 2017) To the extent possible, BMI monitoring sites were located at or near sites used during relicensing studies. Samples at SNYLF sites were collected from each stream at a suitable location within 330 ft (100 m) from the confluence with the Project reservoir. At each BMI and SNYLF monitoring site, biologists collected at least two eDNA samples (i.e., filters) from near the water’s surface and filtered at least 1 liter of water in accordance with guidelines in the literature. Biologists used 0.45-micrometer Millipore SterivexTM filters and a peristaltic pump to collect all eDNA samples in situ (Bergman et al. 2016, Blankenship and Schumer 2022). To prevent contamination, field personnel wore single-use latex gloves and eDNA samples were collected prior to entering the river channel and were collected first from downstream sites before moving upstream. Negative controls were sampled daily by filtering 1 liter of distilled water prior to sample collection. Laboratory personnel analyzed eDNA samples following best practices for eDNA extraction and created and analyzed an extraction negative and quantitative polymerase chain reaction (qPCR) negative with every extraction batch and qPCR plate (Miya et al. 2016). Samples were analyzed with an internal positive control that ensured samples were not inhibited (i.e., a negative result signified DNA was not detected and not an indication of a failed qPCR reaction). Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 2-5 Section 2.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 5. Location of Bucks Creek Project (FERC Project No. 619) benthic macroinvertebrate and monitoring sites and aquatic invasive species eDNA sample sites, 2023. Site ID Location Coordinates (decimal degrees) Location Description License Year 1 (2023) Sample Collection Latitude Longitude Milk Ranch Creek BMI-MRC-3.4 39.967318 -121.227413 Milk Ranch Creek downstream of Three Lakes Dam AIS eDNA BMI-MRC-0.12 39.961313 -121.273472 Milk Ranch Creek upstream of the NFFR confluence AIS eDNA Bucks Creek BMI-BC-6.9 39.904565 -121.233341 Bucks Creek downstream of Lower Bucks Lake Dam AIS eDNA BMI-BC-1.9 39.914006 -121.301389 Bucks Creek near the Tobin Trail BMI survey and AIS eDNA Grizzly Creek BMI-GC-7.1 39.888841 -121.294505 Grizzly Creek downstream of Grizzly Forebay Dam AIS eDNA BMI-GC-2.9 39.856137 -121.33499 Grizzly Creek upstream of the confluence with Wildcat Creek None1 Notes: AIS – aquatic invasive species BMI – benthic macroinvertebrates eDNA – environmental deoxyribonucleic acid NFFR – North Fork Feather River 1 AIS eDNA samples could not be collected during License Year 1 because the site was not safely accessible. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 2.0 Page 2-6 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 6. Locations of Bucks Creek Project (FERC Project No. 619) Sierra Nevada yellow-legged frog/aquatic invasive species eDNA monitoring sites. General Area Site ID Location Description Location Coordinates (decimal degrees) Upstream Downstream Three Lakes Road BR-11 Bear Ravine downstream of diversion 39.91579, -121.227309 39.915273, -121.231287 BR-21 Bear Ravine upstream of diversion 39.91829, -121.22136 39.915779, -121.225963 SFGHC-1 South Fork Grouse Hollow Creek downstream and upstream of diversion 39.958996, -121.234879 39.962776, -121.239515 Grizzly Creek GC-3 Grizzly Creek downstream of Grizzly Forebay Dam 39.889801, -121.294717 39.887994, -121.296287 GC-42 Grizzly Creek upstream of Grizzly Forebay 39.890144, -121.272816 39.88883, -121.279175 Tributaries to Bucks Lake HC-11,2 Lake 39.868135, -121.168189 39.86945, -121.175777 BC-21 Bucks Creek at confluence with Bucks Lake 39.886062, -121.146412 39.88156, -121.154139 RBMC-11,2 Right Hand Branch Mill Creek at confluence with Bucks Lake 39.900537, -121.167939 39.899613, -121.174128 MFMC-11,2 Middle Fork Mill Creek at confluence with Bucks Lake 39.906854, -121.175114 39.903325, -121.177546 MC-11,2 Mill Creek at confluence with Bucks Lake 39.919727, -121.185821 39.91521, -121.184683 1 Site is within Sierra Nevada yellow-legged frog critical habitat. 2 Aquatic invasive species required monitoring site. 2.2 Incidental Observations In addition to this focal species monitoring, PG&E was to report incidental observations of other AIS that could potentially occur in the project area while conducting other work, such as periodic aquatic surveys (i.e., fish, amphibian, BMI). These species include: • New Zealand mudsnail (Potamopyrgus antipodarum), • Asian clam (Corbicula fluminea), • American bullfrog (Lithobates catesbeianus), • curly leaf pondweed (Potamogeton crispus), • Eurasian milfoil (Myriophyllum spicatum), • Hydrilla (Hydrilla verticillata), Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 2-7 Section 2.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara • Brazilian waterweed (Egeria densa), • parrot’s feather milfoil (Myriophyllum aquaticum), • water primrose (Ludwigia spp.), and • didymo (Didymosphenia geminata). 2.3 Data from online AIS databases PG&E accessed and download data from online AIS databases, such as the USGS Non-Indigenous Aquatic Species (NAS) database (https://nas.er.usgs.gov/) and iMapInvasives (http://www.imapinvasives.org/vision) to determine if new AIS have been found in the Project Area. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 2.0 Page 2-8 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara This Page Intentionally Left Blank Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 3-1 Section 3.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara SECTION 3.0 Monitoring Results 3.1 Focal Species Monitoring Results 3.1.1 Quagga and Zebra (Dreissenid) Mussels Based on the results of 2023 monitoring (demonstrating that the project reservoirs have calcium levels <3 mg/l) and the criteria in the Plan, it was determined that the three project reservoirs were unable to support quagga and zebra mussels and that sampling would be repeated every 5 years (PG&E 2024). The next sampling for these species will occur in License Year 6, 2028 or upon acceptance of PG&E’s Invasive Mussel Program by CDFW and approval of a revised Bucks Creek AIS (based upon the Program) by FERC, whichever comes first. 3.1.2 Crayfish Fish population surveys were completed at three sites (Bucks Creek sites F-BC-7.17 and F-BC- 1.98 and Grizzly Creek F-GC-7.03) on September 23-25, 2025. No crayfish were observed. No crayfish were observed at Three Lakes or its tributary streams during four brook trout spawning surveys conducted between September 22 and October 30, 2025, nor were any observed during Sierra Nevada yellow-legged frog surveys conducted over the course of the spring and summer. 3.1.3 Other Focal Species BMI sampling was not required in License Year 3, and SNYLF sampling was only required at two sites on Bear Ravine above and below the diversion. eDNA samples were collected at these two sites on August 27, 2024. eDNA samples did not detect any of the target species. Batrachochytrium dendrobatidis (Bd) was detected one of four replicate samples at the site above the diversion. No eDNA for any other target AIS was detected in any of the samples (Table 7). During laboratory analysis, none of the samples showed signs of inhibition and all the negative control samples (including extraction negative and qPCR negative) tested negative. 3.1.4 Incidental Observations Didymosphenia geminata (commonly referred to as “didymo” or “rock snot”) was again observed at Site F-BC-7.17 on Bucks Creek below Lower Bucks Lake but was much less abundant than in 2023 or 2024. It was also observed in small, sparsely distributed amounts at F-BC-1.98 and F-GC- 7.03 on Grizzly Creek. It was not visually observed at these sites previously but was detected in eDNA samples in 2023. No eDNA samples were collected in 2025. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 3.0 Page 3-2 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 7. Environmental DNA samples collected, and total volume filtered, and detection results for Sierra Nevada yellow-legged frog and aquatic invasive species at Sierra Nevada yellow-legged frog monitoring sites, Bucks Creek Project (FERC Project No. 619), 2025. Site ID eDNA Samples Collected (n) Total Volume Filtered (liter) eDNA detected (yes/no) Ra n a s i e r r a e - Di d y m o s p h e n i a ge m i n a t e Ce r a t o n o v a sh a s t a Te t r a c a p s u l o i d e s br y o s a l m o n a e (p r o l i f e r a t i v e k i d n e y di s e a s e ) Ic h t h y o p h t h i r i u s mu l t i f i l i i s (w h i t e s p o t ) Ba t r a c h o c h y t r i u m de n d r o b a t i d i s Ir i d o v i r d a e sp . BR-1 4 4 No No No No No No No No BR-2 4 4 No No No No No No No No Notes: eDNA – environmental deoxyribonucleic acid n – number Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 3-3 Section 3.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara 3.1.5 Aquatic Invasive Species Database Review The USGS Non-Indigenous Aquatic Species (NAS) database (https://nas.er.usgs.gov/) was queried by creating polygons around the Bucks Creek Project Area. The query identified rainbow trout, Lahontan redside, brook trout, and lake trout as non-indigenous species 1, as well as Didymo. These results are provided in Table 8 (USGS 2025). These were the same results as the 2024 query. No relevant information could be queried from iMapInvasives (http://www.imapinvasives.org/vision), as the site does have support (data) from California. In addition to the database searches above, PG&E requested that the Resource Agencies provide a list of any aquatic invasive species they have records of in the Project Area. CDFW responded that the species below have been observed by “CDFW staff between 2008 and 2019 in these waters and adjoining waters”. These observations reflect historical records provided by CDFW and do not represent new detections during License Year 3 (2025). • Aquatic Invasive Species (AIS) - Aquatic Plants: o Eurasian watermilfoil (Myriophyllum specatum) o Curly-leaf pondweed (Potamogetom crispus) o Brazilian waterweed (Egeria densa) o Water thyme (Hydrilla sp.) o Didymo (Didymosphenia geminata) • Aquatic Invasive Species (AIS) - Invertebrates: o Asian clam (Corbicula fluminea) o Signal crayfish (Pacifastacus leniusculus) o American bullfrog (Lithobates catesbeianus) o Magnificent bryozoan (Pectinatella magnifica) Of these species, PG&E has only observed didymo and signal crayfish in the Project Area. PG&E has requested additional information from CDFW regarding these observations, as they have not been previously reported. The California Weed Mapper (https://weedmap.cal- ipc.org/weedmapper/ accessed 2/18/2026) identifies Eurasian watermilfoil and curly pondweed as occurring in Plumas County near Quincy, but not in the Bucks Lake watershed. It does not indicate that Brazilian waterweed and Hydrilla occur in Plumas County. These locations appear to be the same as identified in AIS Management Plan. This was the only response to our request for this information. 1 CDFW does not consider these fish species to be invasive (https://wildlife.ca.gov/Conservation/Invasives/Species). Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 Section 3.0 Page 3-4 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 8. Non-indigenous species documented in the Milk Ranch Creek (including Three Lakes), Bucks Creek (including Bucks Lake and Lower Bucks Lake), and Grizzly Creek (including Grizzly Forebay) watersheds, Plumas Co., CA, from the USGS Non-Indigenous Aquatic Species (NAS) database, January 29, 2026. Specimen Number Species ID Group Family Scientific Name Common Name Latitude/ Longitude Accuracy Status 1724810 2856 Algae Gomphone- mataceae Didymosphenia geminata didymo 39.9045/ -121.231 Accurate -- 167680 910 Fishes Salmonidae Oncorhynchus mykiss Rainbow Trout 39.88655/ -121.191 Accurate established 28852 647 Fishes Cyprinidae Richardsonius egregius Lahontan Redside 39.88655/ -121.191 Accurate established 167681 939 Fishes Salmonidae Salvelinus fontinalis Brook Trout 39.88655/ -121.191 Accurate established 167682 942 Fishes Salmonidae Salvelinus namaycush Lake Trout 39.88655/ -121.191 Accurate established Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 4-1 Section 4.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara SECTION 4.0 Discussion 4.1 Invasive Mussels 4.1.1 Quagga and Zebra (Dreissenid) Mussels Based on the 2023 sampling results, and in accordance with the Plan, sampling was not conducted for dreissenid mussels in 2025. Invasive mussel (including dreissenid and golden mussels) monitoring will be next conducted in 2028 or upon CDFW acceptance of PG&E’s revision of its Invasive Mussel Prevention Program and approval of a revised Bucks Creek AIS (based upon the accepted Program) by FERC, whichever comes first (see below). 4.1.2 Golden Mussel (Moliolid) Mussels In 2025, the California Fish and Game Code included golden mussel (Limnoperna fortunei) with quagga and zebra mussels as a restricted species, making it illegal to import, transport, or possess this species in California. The emergency listing aims to prevent further spread and protect California's water resources from the potential ecological impacts of this non-native species. As such, it will be included in PG&E’s forthcoming Invasive Mussel Prevention Program. PG&E is continuing to work with CDFW on revising this Program as new information on golden mussel is developed. Once the revised Program is accepted by CDFW, PG&E will coordinate revisions to the Bucks Creek AIS Plan with the Resources Agencies to be consistent with the Program as appropriate. Once the revised Plan has been approved by FERC, it will be implemented as soon as feasible. Until then, PG&E’s approach is to employ the same dressenid mussel monitoring protocol, with lower thresholds for calcium concentrations (i.e., 3 mg/l), which have yet to be firmly defined. This is consistent with the recommendations of the Golden Mussel Response Framework (CDFW et al, 2025). As discussed at last year’s annual meeting, based on the most recent sampling data, the Bucks Creek Project waterbodies have calcium levels of less than the 3 mg/l which is necessary for the survival of golden mussel (Ricciardi 1998, Karatayev et al. 2007; Table 9) and thus have a low vulnerability to infestation. As a result of the golden mussel threat, PG&E has posted CDFW’s updated “Don’t Move a Mussel” poster at all campgrounds and boat launches with available signage. Because calcium concentrations in the Project water bodies are below the threshold needed to support golden mussel, monitoring for this species will be conducted concurrently with that of dreissenid mussels. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project Section 3.0 Page 4-2 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table 9. Habitat requirements for golden mussel (source USGS 2026). 4.2 Crayfish No crayfish were observed during fish or Sierra Nevada yellow-legged frog monitoring in 2025. Unidentified crayfish were observed at a couple locations during the 2023 SNYLF and fish population monitoring. Crayfish monitoring will continue concurrently with the remaining SNYLF and stream fish population schedule. 4.3 Other Focal Species Didymo was observed again in the upper Bucks Creek fish sampling site in 2025 but was less abundant than in 2023 or 2024. It was also visually detected in the lower Bucks Creek and Grizzly Creek fish sampling sites. It was not detected in eDNA samples collected in Bear Ravine as part of Sierra Nevada yellow-legged frog sampling. Batrachochytrium dendrobatidis was not detected in Bear Ravine in 2025. It was detected in 2024 in one of four eDNA replicates collected at the upper site in Bear Ravine but was not detected in the eDNA replicates collected at the lower site. There were no positive detections for Myxobolus cerebralis, Ceratonova shasta, Tetracapsuloides bryosalmonae, Ichthyophthirius multifiliis, or Ranavirus (Frog virus 3) in the Sierra Nevada yellow-legged frog eDNA sampling in 2023. There is no known way to control or eradicate didymo once it is established in a watershed. PG&E has posted CDFW’s AIS posters and a Didymo specific poster at all campgrounds, public kiosks, and boat launches consistent with discussions with the agencies last year. PG&E requires that its employees and contractor personnel follow CDFW decontamination procedures when moving between water bodies To ensure early detection for AIS in the future, eDNA sampling for the aforementioned species will continue to be conducted at the BMI and SNYLF monitoring sites concurrent with the monitoring schedules for those programs (PG&E and City of Santa Clara 2019b, 2019c). Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 4-3 Section 4.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara 4.4 Variances from the Monitoring Plan There were no variances from the AIS Monitoring Plan in 2025. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 5-1 Section 5.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara SECTION 5.0 References Barry, D.E., M. Veillard, C.T. James, L. Brummelhuis, E.A. Pila, A. Turnbull, A. Oddy-van Oploo, X. Han, and P.C. Hanington. 2021. qPCR-based environmental monitoring of Myxobolus cerebralis and phylogenetic analysis of its tubificid hosts in Alberta, Canada. Diseases of Aquatic Organisms 145: 119-137. Bedwell, M.E. and C.S. Goldberg. 2020. Spatial and temporal patterns of environmental DNA detection to inform sampling protocols in lentic and lotic systems. Ecology and Evolution 10(3): 1602–1612 Bergman, P.S., G. Schumer, S. Blankenship, E. Campbell. 2016. Detection of Adult Green Sturgeon Using Environmental DNA Analysis. PLOS ONE. Apr 20;114:e0153500. Blankenship, S., and G. Schumer. 2022. Field collection procedure for aquatic environmental DNA sample collection and analysis. Cramer Fish Sciences - Genidaqs, West Sacramento, California. Boyle, D.G., D.B. Boyle, V. Olsen, J.A.T. Morgan, and A.D. Hyatt. 2004. Rapid quantitative detection of chytridiomycosis (Batrachochytrium dendrobatidis) in amphibian samples using real-time Taqman PCR assay. Diseases of Aquatic Organisms 60(2): 141–148. Claudi, R. and K. Prescott. 2011. Examination of Calcium and pH as predictors of Dreissenid Mussel Survival in the California State Water Project. Prepared for the California Department of Water Resources, Division of Operations and Maintenance, Aquatic Nuisance Species Program. Diggles, M.F., J.R. Rytuba, B.C. Moring, C.T. Wrucke, D.P. Cox, S. Ludington, R.P. Ashley, W.J. Pickthorn, C.T. Hillman, and R.J. Miller. 1996. Geology and Minerals Issues in Sierra Nevada Ecosystem Project: Final report to Congress, vol. II, Assessments and scientific basis for management options. Davis: University of California, Centers for Water and Wildland Resources, 1996. Hallett, S.L. and J.L. Bartholomew. 2006. Application of a real-time PCR assay to detect and quantify the myxozoan parasite Ceratomyxa shasta in river water samples. Diseases of Aquatic Organisms 71: 109-118. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project Section 3.0 Page 2 May 2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Hu, G., K. Huang, W. Zhou, R. Wang, W. Zhao, H. Zou, W. Li, S. Wu, M. Li, and G. Wang. 2022. Comparison of droplet digital PCR and real-time quantitative PCR for quantitative detection of the parasitic ciliate Ichthyophthirius multifiliis in the water environment. Journal of Fish Diseases 46: 357-367. Hutchins, P.R., A.J. Sepulveda, R.M. Martin, and L.R. Hopper. 2017. A probe-based quantitative PCR assay for detecting Tetracapsuloides bryosalmonae in fish tissue and environmental DNA water samples. Conservation Genetics Resource 10: 317-319. Hutchins, P.R., A.J. Sepulveda, R.M. Martin, and L.R. Hopper. 2017. A probe-based quantitative PCR assay for detecting Tetracapsuloides bryosalmonae in fish tissue and environmental DNA water samples. Conservation Genetics Resource 10: 317-319. Leung, W.T.M., L. Thomas-Walters, T.W.J. Garner, F. Balloux, C. Durrant, and S.J. Price. 2017. A quantitative-PCR based method to estimate ranavirus viral load following normalisation by reference to an ultraconserved vertebrate target. Journal of Virological Methods 249: 147-155. Miya, M., T. Minamoto, H. Yamanaka, S.I. Oka, K. Sato, S. Yamamoto, T. Sado, and H. Doi. 2016. Use of a filter cartridge for filtration of water samples and extraction of environmental DNA. Journal of Visualized Experiments 117, p.e54741. PG&E (Pacific Gas and Electric) and the City of Santa Clara. 2016. Final License Application. Bucks Creek Hydroelectric Project, FERC Project No. 619. December. PG&E and the City of Santa Clara. 2019a. Aquatic Invasive Species Management Plan. Bucks Creek Hydroelectric Project, FERC Project No. 619. September. PG&E and City of Santa Clara. 2019b. Bucks Creek Hydroelectric Project (FERC Project No. 619) Aquatic Resources Monitoring Plan. September. PG&E and the City of Santa Clara. 2019c. Sierra Nevada Yellow-legged Frog Management Plan. Bucks Creek Hydroelectric Project, FERC Project No. 619. September. United States Geological Survey (USGS). 2024. Nonindigenous Aquatic Species point map viewer. Available online: https://nas.er.usgs.gov/ Accessed February 6, 2024. USGS. 2025. Nonindigenous Aquatic Species point map viewer. Available online: https://nas.er.usgs.gov/ Accessed January 29, 2025. USGS. 2025. Nonindigenous Aquatic Species point map viewer. Available online: https://nas.er.usgs.gov/ Accessed January 29, 2026. USGS. 2026 Nonindigenous Aquatic Species, Limnoperna fortuei species profile. Available online: https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=3653, Accessed January 29, 2026 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Page 5-3 Section 5.0 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 May 2026 Attachment A Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Attachment A Response to Comments on Agency Review Draft Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 2025 Aquatic Invasive Species Monitoring Report May 2026 Page A-1 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Table A-1. Record of agency comments and responses on the Bucks Creek 2025 Aquatic Invasive Species Monitoring Report. Section Page Commentor (Agency) Comment Response 2.1.2 Crayfish Monitoring, Table 4, 1st footnote 2-3 Kelly Mosinski (PNF) What were these changing environmental conditions? Updated footnote to describe the effects of wildfires on access routes to some locations. 3.1.1 Quagga and Zebra (Dressenid) Mussels, Paragraph 1 3-1 Kelly Mosinski (PNF) Risk Level must have been Low to schedule sampling every 5 years. Due to staff changes, some of us may not have access to previous reports. It would be helpful to include a brief word or clause here about what the results showed to determine the 5-year sampling cycle. Added text to this paragraph describing the basis for the low risk level determination. 3.1.3 Other Focal Species, Paragraph 1 3-1 Kelly Mosinski (PNF) Was there more to the beginning of this sentence? The word “for” at the beginning of the third sentence of this section is extraneous. This word was removed. 3.1.5 Aquatic Invasive Species Database Review, Table 8 3-4 Michael Maher (CDFW) I just want to confirm that all the known fish species present in the Bucks Lake area (Rainbow Trout, Brook Trout, Lake Trout, Brown Trout, Kokanne, Lahontan Redside) are not being classified in any PG&E documents as invasive species. While many fish in the Feather River drainage are non-native, they are not classified by the California Department of Fish and Wildlife as invasive species. Please ensure they are not reflected as invasive species in any finalized document(s). The Plan requires that we review and report on the invasive species in the Bucks Creek watershed reported on USGS Non- Indigenous Aquatic Species database. Table 8 provides the species listed in the USGS Non-Indigenous Aquatic Species (NAS) database. The report only identifies “rainbow trout, Lahontan redside, brook trout, and lake trout as non-indigenous species” and not as invasive species. PG&E does not assume to determine whether species is invasive; this is the purview of CDFW. A footnote has been added to the report clarifying that CDFW does not consider these fish species to be invasive. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 2025 Aquatic Invasive Species Monitoring Report May 2026 Page A-2 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Section Page Commentor (Agency) Comment Response Section 4.1.2 Golden Mussel (Moliolid) Mussels Angie Montalvo (CDFW) PGE shall update their current Quagga-Zebra Mussel Prevention Plan to an Invasive Mussel Prevention Plan to include both Golden mussel and Axe-head mussel this year per F&G Code and regs. Due to the discovery and spread of Golden mussels in October 2024, the frequency of monitoring and methods of monitoring at each waterbody has been revised to include Golden mussel where either a waterbody is at risk or is suitable (equal and/or greater than three (3) mg/L calcium) for both introduction and establishment or at not at risk or not suitable (less than three (3) mg/L calcium for introduction and establishment. The information and guidance used in 2.1.1 Quagga and Zebra (Dreissenid) Mussel Monitoring assessing the vulnerability to infestation of waterbodies as “High”, “Moderate”, “Low”, or “None” is no longer used or valid due to the discovery of Golden mussel in the Sacramento-San Joaquin Delta in October 2024. Waterbodies that are either at risk or not at risk based with a calcium shall be monitored monthly by surface or reading deployed artificial substrates. In stating this, the tables presented are no longer used or valid (Table 1 and Table 2). Monitoring of all waterbodies regardless of risk is to be conducted monthly with the following the parameters - visual surface survey or checking deployed artificial substrates. Waterbodies that are at risk (≥3 mg/L) will also include plankton tow monitoring (in addition to visual or artificial substrate) from spring (Apr) through fall (October) where periodicity is annual and frequency is monthly. Water quality (WQ) will be conducted at each visit and site. Due to the discovery of Golden mussel in October 2024, monitoring will continue this year (2026) at all waterbodies where parameters are based on calcium value. All waters (at risk and no risk) will include surface survey or artificial substrate readings each month. Waterbodies at risk will include additional monitoring to include plankton tow sampling. The threshold to activate plankton tow sampling is a calcium value of ≥3 mg/L. The comments received from Ms. Montalvo relate to the Bucks Creek Aquatic Invasive Species Plan, rather than the 2025 Bucks Creek Aquatic Invasive Species Report. The Plan was reviewed and approved by the Resource Agencies, including CDFW, and approved by FERC upon License issuance on June 16, 2022. The 2025 monitoring report follows the requirements laid out in the Plan, including the risk rating for quagga and zebra mussel that were determined in 2023. The 2025 monitoring report explicitly acknowledges the introduction of golden mussel into California in 2024 after the Plan was approved. Since that time, PG&E has been actively engaged with CDFW to understand the potential threat that golden mussels present and continues to work with CDFW to update PG&E’s Invasive Mussel Prevention Program, which addresses all PG&E reservoirs. These activities are discussed in Section 4.1.2. Once the update to the Invasive Mussel Prevention Program has been accepted by CDFW, PG&E will coordinate revisions to the Bucks Creek AIS Plan with the Resources Agencies, as appropriate. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Bucks Creek Hydroelectric Project, FERC Project No. 619 2025 Aquatic Invasive Species Monitoring Report May 2026 Page A-3 Bucks Creek Hydroelectric Project, FERC Project No. 619 ©2026, Pacific Gas and Electric Company and the City of Santa Clara Section Page Commentor (Agency) Comment Response 3.1.1 Quagga and Zebra (Dreissenid) Mussels The following statement is not acceptable – Based on the results of 2023 monitoring and the criteria in the Plan, it was determined that the three project reservoirs were unable to support QZM and that sampling would be repeated every 5 year (PGE 2024). The next sampling for these species will occur in License Year 6, 2028. This statement is consistent with the FERC-approved Bucks Creek AIS Plan. Please see response to previous comment. 4.1.1 Quagga and Zebra (Dreissenid) Mussels The following statement is not acceptable – Based on the 2023 sampling results, and in accordance with the Plan, sampling was not conducted for dreissenid mussels in 2025. Invasive mussels (including dreissenid and golden mussels) monitoring will be next conducted in 2028. These statements (3.1.1 & 4.1.1) are not accounting for Golden mussel, where monitoring would be conducted yearly due to water quality parameters (calcium) and suitability for a Golden mussel introduction and establishment. This statement is consistent with the FERC-approved Bucks Creek AIS Plan. Please see response to previous comment. Angie Montalvo (CDFW) Angie Montalvo (CDFW) Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Enclosure 2 Document Accession #: 20260522-5242 Filed Date: 05/22/2026 From:Moore, Trevor To:Maher, Michael@Wildlife; Visinoni, Jamie; dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Lawson, Beth@Wildlife; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards; Fisch, Nathan@Waterboards; blancapaloma@msn.com; Wise Jr., Larry; Herman, Andie; McKay, Jim; Lent, Michelle; Salve, Rohit; Lieby, Zak; Fransz, Matthew; Stephens, Dan; Johnson, Shannon; Stevens, Kevin; Valentina Guzman; Forrest, Kathleen; Hamilton, David - FS, CA; Mosinski, Kelly - FS, CA; Diane Asuncion; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin; Larson, Anika Cc:kurt.sable@usda.gov; Alvarez, Dawn -FS; Edlund, Leslie - FS; Young, Megan; Brenzovich, Erika - FS, CA; Fiel, Andrew - FS, CA; ashlee.taylor@usda.gov; caitlin.ostomel@usda.gov; Loera, Josef Subject:RE: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report Date:Thursday, May 7, 2026 10:33:27 AM Attachments:image001.png image002.png Good Morning Michael, Thank you for passing this information along. That aligns with our understanding of the changes to the Fish and Game Code. We are actively in the process of revising our prevention program based on the available literature and will continue working with the CDFW regional coordinators during that process. Respectfully, Trevor Moore Senior Hydroelectric License Coordinator Pacific Gas & Electric Company (530) 205-7345 From: Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov> Sent: Wednesday, May 6, 2026 9:34 AM To: Moore, Trevor <tqmi@pge.com>; Visinoni, Jamie <JNVS@pge.com>; dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards <Bryan.Muro@Waterboards.ca.gov>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; blancapaloma@msn.com; Wise Jr., Larry <LMWO@pge.com>; Herman, Andie <AEHb@pge.com>; McKay, Jim <J11V@pge.com>; Lent, Michelle <M4LQ@pge.com>; Salve, Rohit <ROSK@pge.com>; Lieby, Zak <ZXL8@pge.com>; Fransz, Matthew <mdfc@pge.com>; Stephens, Dan <DPSK@pge.com>; Johnson, Shannon <SxDm@pge.com>; Stevens, Kevin <K3SN@pge.com>; Valentina Guzman <VGuzman@SantaClaraCA.gov>; Forrest, Kathleen <KAFM@pge.com>; Hamilton, David - FS, CA <david.hamilton@usda.gov>; Mosinski, Kelly - FS, CA <kelly.mosinski@usda.gov>; Diane Asuncion <dasuncion@santaclaraca.gov>; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin <ATCS@pge.com>; Larson, Anika <A9L6@pge.com> Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Cc: kurt.sable@usda.gov; Alvarez, Dawn -FS <dawn.alvarez@usda.gov>; Edlund, Leslie - FS <leslie.edlund@usda.gov>; Young, Megan <MRY2@pge.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; Fiel, Andrew - FS, CA <Andrew.Fiel@usda.gov>; ashlee.taylor@usda.gov; caitlin.ostomel@usda.gov; Loera, Josef <J14I@pge.com> Subject: RE: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report !!! EXTERNAL SENDER !!! This email came from outside PG&E. Think before you click. Be extra wary of links, attachments, providing sensitive information, and QR Codes. If this email seems suspicious, use the REPORT PHISH BUTTON. Hello Trevor, I spoke with the AIS Coordinator at our Region 2 office and they wanted me to pass along that F&G Code and regs will be changing this year to include all invasive mussels (i.e., quagga, zebra, golden, axe-head, etc.) and that letters will be going out shortly to instruct water managers to either revise their current preventions plans (from QZM to all invasive mussels) and/or to develop a prevention plan for managed waters lacking such program. Let me know if you have any questions or would like to discuss. Thank you Trevor, Michael Maher Region 2 FERC Coordinator | ( Cell: 916-597-5505 California Department of Fish & Wildlife | North Central Region 1701 Nimbus Road, Rancho Cordova | michael.maher@wildlife.ca.gov From: Moore, Trevor <tqmi@pge.com> Sent: Friday, May 1, 2026 10:41 AM To: Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov>; Visinoni, Jamie <JNVS@pge.com>; dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards <Bryan.Muro@Waterboards.ca.gov>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; blancapaloma@msn.com; Wise Jr., Larry <LMWO@pge.com>; Herman, Andie <AEHb@pge.com>; McKay, Jim <J11V@pge.com>; Lent, Michelle <M4LQ@pge.com>; Salve, Rohit <ROSK@pge.com>; Lieby, Zak <ZXL8@pge.com>; Fransz, Matthew <mdfc@pge.com>; Stephens, Dan <DPSK@pge.com>; Johnson, Shannon <SxDm@pge.com>; Stevens, Kevin <K3SN@pge.com>; Valentina Guzman <VGuzman@SantaClaraCA.gov>; Forrest, Kathleen <KAFM@pge.com>; Hamilton, David - FS, CA <david.hamilton@usda.gov>; Mosinski, Kelly - FS, CA <kelly.mosinski@usda.gov>; Diane Asuncion <dasuncion@santaclaraca.gov>; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin <ATCS@pge.com>; Larson, Anika <A9L6@pge.com> Cc: kurt.sable@usda.gov; Alvarez, Dawn -FS <dawn.alvarez@usda.gov>; Edlund, Leslie - FS Document Accession #: 20260522-5242 Filed Date: 05/22/2026 <leslie.edlund@usda.gov>; Young, Megan <MRY2@pge.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; Fiel, Andrew - FS, CA <Andrew.Fiel@usda.gov>; ashlee.taylor@usda.gov; caitlin.ostomel@usda.gov; Loera, Josef <J14I@pge.com> Subject: RE: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report WARNING: This message is from an external source. Verify the sender and exercise caution when clicking links or opening attachments. Michael, My apologies on the delayed response. Our team has had an opportunity to discuss Angie’s comments and acknowledge that there will likely be changes to our AIS monitoring program in response to the introduction of golden mussels. However, we do not feel it is appropriate to modify the 2025 AIS Monitoring Report or the FERC-approved Bucks Creek AIS plan at this time, as the specific changes in our monitoring program in response to golden mussels have not been solidified. PG&E will continue to work with CDFW staff to revise the PG&E Invasive Mussel Prevention Program. Once PG&E’s revised Invasive Mussel Prevention Program is approved by CDFW, we propose revisiting how the updates will impact the Bucks Creek AIS Plan, and any other affected license- specific plans. Please let us know if you have any concerns with that approach. Respectfully, Trevor Moore Senior Hydroelectric License Coordinator Pacific Gas & Electric Company (530) 205-7345 From: Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov> Sent: Tuesday, April 7, 2026 1:43 PM To: Visinoni, Jamie <JNVS@pge.com>; dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards <Bryan.Muro@Waterboards.ca.gov>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; blancapaloma@msn.com; Wise Jr., Larry <LMWO@pge.com>; Herman, Andie <AEHb@pge.com>; McKay, Jim <J11V@pge.com>; Lent, Michelle <M4LQ@pge.com>; Salve, Rohit <ROSK@pge.com>; Lieby, Zak <ZXL8@pge.com>; Fransz, Matthew <mdfc@pge.com>; Stephens, Dan <DPSK@pge.com>; Johnson, Shannon <SxDm@pge.com>; Stevens, Kevin <K3SN@pge.com>; Valentina Guzman <VGuzman@SantaClaraCA.gov>; Forrest, Kathleen <KAFM@pge.com>; Hamilton, David - FS, CA Document Accession #: 20260522-5242 Filed Date: 05/22/2026 <dasuncion@santaclaraca.gov>; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin <ATCS@pge.com>; Moore, Trevor <tqmi@pge.com>; Larson, Anika <A9L6@pge.com> Cc: kurt.sable@usda.gov; Alvarez, Dawn -FS <dawn.alvarez@usda.gov>; Edlund, Leslie - FS <leslie.edlund@usda.gov>; Young, Megan <MRY2@pge.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; Fiel, Andrew - FS, CA <Andrew.Fiel@usda.gov>; ashlee.taylor@usda.gov; caitlin.ostomel@usda.gov; Loera, Josef <J14I@pge.com> Subject: RE: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report !!! EXTERNAL SENDER !!! This email came from outside PG&E. Think before you click. Be extra wary of links, attachments, providing sensitive information, and QR Codes. If this email seems suspicious, use the REPORT PHISH BUTTON. Hello Jamie, Our Aquatic Invasive Species Regional Coordinator, Angie Montalvo, has reviewed your Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report, and offers the following comments: Section 4.1.2 Golden Mussel (Moliolid) Mussels PGE shall update their current Quagga-Zebra Mussel Prevention Plan to an Invasive Mussel Prevention Plan to include both Golden mussel and Axe-head mussel this year per F&G Code and regs. Due to the discovery and spread of Golden mussels in October 2024, the frequency of monitoring and methods of monitoring at each waterbody has been revised to include Golden mussel where either a waterbody is at risk or is suitable (equal and/or greater than three (3) mg/L calcium) for both introduction and establishment or at not at risk or not suitable (less than three (3) mg/L calcium for introduction and establishment. The information and guidance used in 2.1.1 Quagga and Zebra (Dreissenid) Mussel Monitoring assessing the vulnerability to infestation of waterbodies as “High”, “Moderate”, “Low”, or “None” is no longer used or valid due to the discovery of Golden mussel in the Sacramento-San Joaquin Delta in October 2024. Waterbodies that are either at risk or not at risk based with a calcium shall be monitored monthly by surface or reading deployed artificial substrates. In stating this, the tables presented are no longer used or valid (Table 1 and Table 2). Monitoring of all waterbodies regardless of risk is to be conducted monthly with the following the parameters - visual surface survey or checking deployed artificial substrates. Waterbodies that are at risk (≥3 mg/L) will also include plankton tow monitoring (in addition to visual or artificial substrate) from spring (Apr) through fall (October) where periodicity is annual and frequency is monthly. Water quality (WQ) will be conducted at each visit and site. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 at all waterbodies where parameters are based on calcium value. All waters (at risk and no risk) will include surface survey or artificial substrate readings each month. Waterbodies at risk will include additional monitoring to include plankton tow sampling. The threshold to activate plankton tow sampling is a calcium value of ≥3 mg/L. 3.1.1 Quagga and Zebra (Dreissenid) Mussels The following statement is not acceptable – Based on the results of 2023 monitoring and the criteria in the Plan, it was determined that the three project reservoirs were unable to support QZM and that sampling would be repeated every 5 year (PGE 2024). The next sampling for these species will occur in License Year 6, 2028. 4.1.1 Quagga and Zebra (Dreissenid) Mussels The following statement is not acceptable – Based on the 2023 sampling results, and in accordance with the Plan, sampling was not conducted for dreissenid mussels in 2025. Invasive mussels (including dreissenid and golden mussels) monitoring will be next conducted in 2028. These statements (3.1.1 & 4.1.1) are not accounting for Golden mussel, where monitoring would be conducted yearly due to water quality parameters (calcium) and suitability for a Golden mussel introduction and establishment. I will be reaching out to Matthew to update the current prevention plan. Please let me know if you have any questions or would like to discuss our comments. Thank you Jamie, Michael Maher Region 2 FERC Coordinator | ( Cell: 916-597-5505 California Department of Fish & Wildlife | North Central Region 1701 Nimbus Road, Rancho Cordova | michael.maher@wildlife.ca.gov From: Visinoni, Jamie <JNVS@pge.com> Sent: Monday, March 2, 2026 1:53 PM To: dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov>; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards <Bryan.Muro@Waterboards.ca.gov>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; blancapaloma@msn.com; Wise Jr., Larry <LMWO@pge.com>; Herman, Andie <AEHb@pge.com>; McKay, Jim <J11V@pge.com>; Lent, Michelle <M4LQ@pge.com>; Salve, Rohit <ROSK@pge.com>; Lieby, Zak <ZXL8@pge.com>; Fransz, Matthew <mdfc@pge.com>; Stephens, Dan <DPSK@pge.com>; Johnson, Shannon <SxDm@pge.com>; Stevens, Kevin <K3SN@pge.com>; Valentina Guzman <VGuzman@SantaClaraCA.gov>; Forrest, Kathleen <KAFM@pge.com>; Hamilton, David - FS, CA <david.hamilton@usda.gov>; Mosinski, Kelly - FS, CA <kelly.mosinski@usda.gov>; Diane Asuncion Document Accession #: 20260522-5242 Filed Date: 05/22/2026 <dasuncion@santaclaraca.gov>; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin <ATCS@pge.com>; Moore, Trevor <tqmi@pge.com>; Larson, Anika <A9L6@pge.com> Cc: kurt.sable@usda.gov; Alvarez, Dawn -FS <dawn.alvarez@usda.gov>; Edlund, Leslie - FS <leslie.edlund@usda.gov>; Young, Megan <MRY2@pge.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; Fiel, Andrew - FS, CA <Andrew.Fiel@usda.gov>; ashlee.taylor@usda.gov; caitlin.ostomel@usda.gov; Loera, Josef <J14I@pge.com> Subject: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report WARNING: This message is from an external source. Verify the sender and exercise caution when clicking links or opening attachments. Hello ECG and Resource Agencies, This email presents the Draft 2025 Aquatic Invasive Species Monitoring Report for Pacific Gas and Electric Company’s (PG&E) Bucks Creek Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No. 619. FERC issued a new license for the Bucks Creek Project on June 16, 2022. License Article 401(a) requires the licensees to implement resource protection plans required by State Water Resources Control Board (SWRCB) 401 Water Quality Certification (WQC) conditions and U.S. Department of Agriculture, Forest Service’s (“Forest Service”) section 4(e) conditions with the Commission. WQC Condition 17 and Forest Service section 4(e) Condition No. 44 require the Aquatic Invasive Species (AIS) Management Plan. In accordance with the approved AIS Plan, PG&E began implementing the Plan in License Year 1 (2023), the first full calendar year after license issuance. The attached draft 2025 Aquatic Invasive Species Monitoring Report documents the results of the 2025 monitoring. Please provide any input on the draft report by April 1, 2026 (30 days from today) and we will discuss the details of the report during the March 25, 2026, Ecological Consultation Meeting. Thank you, Jamie Visinoni Hydro License Project Manager | Power Generation m: (530) 215-6676 | e: jnvs@pge.com You can read about PG&E’s data privacy practices at PGE.com/privacy. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 From:Visinoni, Jamie To:Mosinski, Kelly - FS, CA Cc:Moore, Trevor Subject:RE: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report Date:Wednesday, April 1, 2026 1:27:59 PM Attachments:image001.png image002.png Hi Kelly, Thank you for sending your comments on the AIS monitoring report. We’ve received them and they are currently in review by the team. I also wanted to confirm that I will keep you listed as the third USFS ECG member, so you’ll continue to be included on the mailing list for future reports and communications. Thanks again, Jamie V From: Mosinski, Kelly - FS, CA <kelly.mosinski@usda.gov> Sent: Wednesday, April 1, 2026 11:12 AM To: Visinoni, Jamie <JNVS@pge.com>; dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Michael.maher@wildlife.ca.gov; beth.lawson@wildlife.ca.gov; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards <bryan.muro@waterboards.ca.gov>; Nathan.Fisch@waterboards.ca.gov; blancapaloma@msn.com; Wise Jr., Larry <LMWO@pge.com>; Herman, Andie <AEHb@pge.com>; McKay, Jim <J11V@pge.com>; Lent, Michelle <M4LQ@pge.com>; Salve, Rohit <ROSK@pge.com>; Lieby, Zak <ZXL8@pge.com>; Fransz, Matthew <MDFc@pge.com>; Stephens, Dan <DPSK@pge.com>; Johnson, Shannon <SxDm@pge.com>; Stevens, Kevin <K3SN@pge.com>; Valentina Guzman <VGuzman@SantaClaraCA.gov>; Forrest, Kathleen <KAFM@pge.com>; Hamilton, David - FS, CA <david.hamilton@usda.gov>; Diane Asuncion <dasuncion@santaclaraca.gov>; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin <ATCS@pge.com>; Moore, Trevor <TQMI@pge.com>; Larson, Anika <A9L6@pge.com> Cc: Sable, Kurt - FS, CA <kurt.sable@usda.gov>; Alvarez, Dawn - FS, CA <dawn.alvarez@usda.gov>; Edlund, Leslie - FS <leslie.edlund@usda.gov>; Young, Megan <MRY2@pge.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; Fiel, Andrew - FS, CA <Andrew.Fiel@usda.gov>; Taylor, Ashlee - FS, CA <Ashlee.Taylor@usda.gov>; Ostomel, Caitlin - FS, CA <Caitlin.Ostomel@usda.gov>; Loera, Josef <J14I@pge.com> Subject: RE: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report !!! EXTERNAL SENDER !!! This email came from outside PG&E. Think before you click. Be extra wary of links, Document Accession #: 20260522-5242 Filed Date: 05/22/2026 attachments, providing sensitive information, and QR Codes. If this email seems suspicious, use the REPORT PHISH BUTTON. Hi Jamie, Attached is the AIS monitoring report with a couple of comments. Also, although I won’t be a primary or alternate POC for Plumas NF, I may be reviewing many of these reports so can you please keep me included in the ECG mailing list? I think I indicated otherwise in my last email. Thank you, Kelly Mosinski Wildlife Biologist Forest Service Plumas National Forest Supervisor's Office p: 530-283-7827 c: 530-801-1027 kelly.mosinski@usda.gov 159 Lawrence St Quincy, CA 95971 From: Visinoni, Jamie <JNVS@pge.com> Sent: Monday, March 2, 2026 1:53 PM To: dave@americanwhitewater.org; bigwolf_1962@yahoo.com; Michael.maher@wildlife.ca.gov; beth.lawson@wildlife.ca.gov; aondrea_bartoo@fws.gov; trina@maidusummit.org; shannon@maidusummit.org; Muro, Bryan@Waterboards <bryan.muro@waterboards.ca.gov>; Nathan.Fisch@waterboards.ca.gov; blancapaloma@msn.com; Wise Jr., Larry <LMWO@pge.com>; Herman, Andie <AEHb@pge.com>; McKay, Jim <J11V@pge.com>; Lent, Michelle <M4LQ@pge.com>; Salve, Rohit <ROSK@pge.com>; Lieby, Zak <ZXL8@pge.com>; Fransz, Matthew <MDFc@pge.com>; Stephens, Dan <DPSK@pge.com>; Johnson, Shannon <SxDm@pge.com>; Stevens, Kevin <K3SN@pge.com>; Valentina Guzman <VGuzman@SantaClaraCA.gov>; Forrest, Kathleen <KAFM@pge.com>; Hamilton, David - FS, CA <david.hamilton@usda.gov>; Mosinski, Kelly - FS, CA <kelly.mosinski@usda.gov>; Diane Asuncion <dasuncion@santaclaraca.gov>; wayneeniner@gmail.com; angelina@shastaheadwaters.com; konkowvalleybandpoctribalchair@gmail.com; Crowell, Austin <ATCS@pge.com>; Moore, Trevor <TQMI@pge.com>; Larson, Anika <A9L6@pge.com> Cc: Sable, Kurt - FS, CA <kurt.sable@usda.gov>; Alvarez, Dawn - FS, CA <dawn.alvarez@usda.gov>; Edlund, Leslie - FS <leslie.edlund@usda.gov>; Young, Megan <MRY2@pge.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; Fiel, Andrew - FS, CA <Andrew.Fiel@usda.gov>; Taylor, Ashlee - FS, CA <Ashlee.Taylor@usda.gov>; Ostomel, Caitlin - FS, CA <Caitlin.Ostomel@usda.gov>; Loera, Josef <J14I@pge.com> Subject: Bucks Creek Hydroelectric Project, FERC Project No. 619 - 2025 Aquatic Invasive Species Monitoring Report Hello ECG and Resource Agencies, Document Accession #: 20260522-5242 Filed Date: 05/22/2026 This email presents the Draft 2025 Aquatic Invasive Species Monitoring Report for Pacific Gas and Electric Company’s (PG&E) Bucks Creek Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No. 619. FERC issued a new license for the Bucks Creek Project on June 16, 2022. License Article 401(a) requires the licensees to implement resource protection plans required by State Water Resources Control Board (SWRCB) 401 Water Quality Certification (WQC) conditions and U.S. Department of Agriculture, Forest Service’s (“Forest Service”) section 4(e) conditions with the Commission. WQC Condition 17 and Forest Service section 4(e) Condition No. 44 require the Aquatic Invasive Species (AIS) Management Plan. In accordance with the approved AIS Plan, PG&E began implementing the Plan in License Year 1 (2023), the first full calendar year after license issuance. The attached draft 2025 Aquatic Invasive Species Monitoring Report documents the results of the 2025 monitoring. Please provide any input on the draft report by April 1, 2026 (30 days from today) and we will discuss the details of the report during the March 25, 2026, Ecological Consultation Meeting. Thank you, Jamie Visinoni Hydro License Project Manager | Power Generation m: (530) 215-6676 | e: jnvs@pge.com You can read about PG&E’s data privacy practices at PGE.com/privacy. This electronic message contains information generated by the USDA solely for the intended recipients. Any unauthorized interception of this message or the use or disclosure of the information it contains may violate the law and subject the violator to civil or criminal penalties. If you believe you have received this message in error, please notify the sender and delete the email immediately. Document Accession #: 20260522-5242 Filed Date: 05/22/2026 Document Content(s) PGE20260522_619_Bucks_AIS_2025_Plan_Report.pdf ...........................1 Document Accession #: 20260522-5242 Filed Date: 05/22/2026