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HomeMy WebLinkAbout06.30.25 Board Correspondence_ FW_ Annual Water Quality_Minimum Flow submitted in FERC P-2107-000 by Pacific Gas and Electric Company,et al.From: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; Nuzum, Danielle Subject:Board Correspondence: FW: Annual Water Quality/Minimum Flow submitted in FERC P-2107-000 by Pacific Gas and Electric Company,et al. Date:Monday, June 30, 2025 4:49:27 PM Please see Board Correspondence -----Original Message----- From: 'FERC eSubscription' <eSubscription@ferc.gov> Sent: Monday, June 30, 2025 2:05 PM Subject: Annual Water Quality/Minimum Flow submitted in FERC P-2107-000 by Pacific Gas and Electric Company,et al. .ATTENTION: This message originated from outside Butte County. Please exercise judgment before opening attachments, clicking on links, or replying.. On 6/30/2025, the following Filing was submitted to the Federal Energy Regulatory Commission (FERC), Washington D.C.: Filer: Pacific Gas and Electric Company Pacific Gas & Electric Company (as Agent) Docket(s): P-2107-000 Lead Applicant: Pacific Gas and Electric Company Filing Type: Annual Water Quality/Minimum Flow Description: Pacific Gas and Electric Company submits Water Temperature Monitoring 2024 Annual Data Report re the Poe Hydroelectric Project under P-2107. To view the document for this Filing, click here https://urldefense.com/v3/__https://elibrary.ferc.gov/eLibrary/filelist?accession_num=20250630- 5257__;!!KNMwiTCp4spf!HOEItPWwPuwr9OnAlT6nziILPJVpQ5V34MxpgK6ky2EbrGpCp_KbW_bjMZtiTaoKsSNbPALl4WdiNcpmnpYkkzow9qZPnQFaJXY8$ To modify your subscriptions, click here: ------------------------------------------------------------------------ Please do not respond to this email. Online help is available here: https://urldefense.com/v3/__http://www.ferc.gov/efiling-help.asp__;!!KNMwiTCp4spf!HOEItPWwPuwr9OnAlT6nziILPJVpQ5V34MxpgK6ky2EbrGpCp_KbW_bjMZtiTaoKsSNbPALl4WdiNcpmnpYkkzow9qZPnehkgTEN$ or for phone support, call 866-208-3676. Power Generation 300 Lakeside Drive Oakland, CA 94612 Mailing Address: P.O. Box 28209 Oakland, CA 94604 June 30, 2025 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: Poe Hydroelectric Project, FERC No. 2107-CA Water Temperature Monitoring 2024 Annual Data Report Dear Secretary Reese: This letter presents Water Temperature Monitoring 2024 Annual Data Report for Pacific Gas and Electric Company’s (PG&E) Poe Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No. 2107. Pursuant to the Poe Water Temperature Monitoring Plan, approved by FERC December 10, 2019, PG&E developed a draft Water Temperature Monitoring 2024 Annual Data Report and, on June 3, 2025, submitted it to the Forest Service, State Water Resources Control Board, California Department of Fish and Wildlife, United States Fish and Wildlife Service, Butte County, and Plumas County (Agencies) for comment. The California Department of Fish and Wildlife provided comments requesting the 2024 data provided in additional formats, which PG&E provided on June 30, 2025. No additional Agency comments were received. The Water Temperature Monitoring 2024 Annual Data Report is provided in Enclosure 1. The agency consultation record is provided in Enclosure 2. If you have questions or comments regarding this matter, please contact Anna Urias, license coordinator for PG&E, at (530) 201-1961. Sincerely, Matthew Joseph Hydro License Supervisor Enclosures: 1) Water Temperature Monitoring 2024 Annual Data Report, prepared by PG&E, Sagraves Environmental Services, and Spring River Ecological Sciences LLC and dated March 2025 2) Agency Consultation Record via Email cc: Attached List Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Debbie-Anne Reese, Secretary June 30, 2025 Page 2 cc: via email (w/Enclosures) Loren Everest, Forest Service - loren.everest@usda.gov Dawn Alvarez, Forest Service - dawn.alvarez@usda.gov Kurt Sable, Forest Service - kurt.sable@usda.gov Leigh Bartoo, USFWS - Aondrea_Bartoo@fws.gov Beth Lawson, CDFW - Beth.Lawson@wildlife.ca.gov Michael Maher, CDFW – Michael.Maher@wildlife.ca.gov Peggy Moak, Butte County – pmoak@buttecounty.net Kelly Peterson, Butte County – Kpeterson@buttecounty.net Kamie Loser, Butte County - kloeser@buttecounty.net Tracey Ferguson, Plumas County – traceyferguson@countyofplumas.net Jessica Dyke, SWRCB - Jessica.Dyke@Waterboards.ca.gov Nathan Fisch, SWRCB - Nathan.Fisch@Waterboards.ca.gov Document Accession #: 20250630-5257 Filed Date: 06/30/2025 ENCLOSURE 1 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 WATER TEMPERATURE MONITORING 2024 Annual Data Report Poe Hydroelectric Project FERC Project No. 2107 March 2025 © 2025, Pacific Gas and Electric Company Document Accession #: 20250630-5257 Filed Date: 06/30/2025 PACIFIC GAS AND ELECTRIC COMPANY Poe Hydroelectric Project FERC Project No. 2107 WATER TEMPERATURE MONITORING 2024 Annual Data Report March 2025 Report Contact: Rohit Salve (Rohit.Salve@pge.com) Pacific Gas and Electric Company Report prepared in collaboration with: Timothy Sagraves Sagraves Environmental Services & Spring Rivers Ecological Sciences LLC © 2025, Pacific Gas and Electric Company Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature i March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company TABLE OF CONTENTS Page 1.0 Introduction ........................................................................................................................1 1.1 Project Setting ..........................................................................................................2 1.2 Goal and Objectives .................................................................................................4 1.3 Scope of Report........................................................................................................5 1.4 Consultation .............................................................................................................5 2.0 Methods Summary .............................................................................................................6 2.1 Water Temperature Monitoring ...............................................................................6 2.1.1 Sampling Locations .....................................................................................6 2.1.2 Water Temperature Measurement................................................................6 2.2 Quality Assurance and Control Procedures .............................................................6 2.3 Poe Reach Stream Flow ...........................................................................................9 2.4 Poe Project Meteorology..........................................................................................9 3.0 Results ...............................................................................................................................10 3.1 Monitoring Issues...................................................................................................10 3.2 2024 Water Year Type ...........................................................................................10 3.3 Water Temperature Monitoring .............................................................................10 3.3.1 Station WT-3 ..............................................................................................12 3.3.2 Station WT-4 ..............................................................................................13 3.3.3 Station WT-5 ..............................................................................................14 3.3.4 Station WT-6 ..............................................................................................15 3.4 Comparison of Water Temperatures in Poe Project ..............................................16 3.5 Maximum Weekly Average Temperature (MWAT) .............................................18 3.6 2024 Stream Flow ..................................................................................................21 3.6.1 Poe Reach...................................................................................................21 3.6.2 Poe Powerhouse .........................................................................................21 3.7 2024 Meteorology ..................................................................................................21 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature ii March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 4.0 References .........................................................................................................................24 APPENDICES Appendix A – Water Temperature Monitoring Plan .................................................................. A-1 Appendix B – Methodology.........................................................................................................B-1 Appendix C – Water Temperature ...............................................................................................C-1 Appendix D – Hydrology............................................................................................................. E-1 Appendix E – Meteorology ......................................................................................................... D-1 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature iii March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company LIST OF FIGURES Page Figure 1. Location of the Poe Hydroelectric Project in northeastern California. ........................3 Figure 2. Monitoring stations in the 2023 Water Temperature Monitoring Plan. .......................8 Figure 3. Daily maximum, minimum, and average water temperatures NFFR at Pulga Bridge (Station WT-3) – 2024. ...................................................................................12 Figure 4. Daily maximum, minimum, and average water temperatures NFFR at Bardees Bar (Station WT-4) – 2024. ..........................................................................13 Figure 5. Daily maximum, minimum, and average water temperatures NFFR above Poe Powerhouse (Station WT-5) – 2024. ...................................................................14 Figure 6. Daily maximum, minimum, and average water temperatures NFFR below Poe Powerhouse (Station WT-6) – 2024. ...................................................................15 Figure 7. Comparison of daily average water temperature from the Poe Project of the NFFR with mean daily air temperatures from Poe Powerhouse - 2024. ....................17 Figure 8. Weekly (7-Day) running average water temperature at each station monitored in 2024. .......................................................................................................................20 Figure 9. Daily average stream flow in the Poe Project area - 2024. .........................................23 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature iv March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company LIST OF TABLES Page Table 1. Water Temperature Monitoring Locations and Descriptions for the Poe Project. ..........................................................................................................................7 Table 2. Summary of 2024 continuous water temperature monitoring in the Poe Project. ........................................................................................................................11 Table 3. Summary of maximum weekly average water temperature (by month) and the absolute maximum weekly average temperature (MWAT) for each station monitored in 2024. ......................................................................................................19 Table 4. Summary of Poe Project flow during the 2024 monitoring period. ...........................22 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 1 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 1.0 INTRODUCTION This annual report presents water temperature data collected during the 2024 water temperature monitoring effort for the Poe Hydroelectric Project (Poe Project), Federal Energy Regulatory Commission (FERC) Project No. 2107. FERC issued Pacific Gas and Electric Company (PG&E) a new license for the Poe Project on December 17, 2018. License Article 401 and Condition No. 10 of the Section 401 Water Quality Certification (WQC), which is issued by the State Water Resources Control Board (SWRCB) and incorporated as Appendix A of the license, requires the development of a Water Temperature Monitoring Plan to document water temperature in the Poe Bypass Reach (i.e., Poe Reach) following the minimum instream flow rate changes implemented under the 2018 FERC license. PG&E developed the Water Temperature Monitoring Plan (PG&E 2019a, 2019 Plan), which was approved by FERC order on December 10, 2019. In accordance with WQC Condition 10, the 2019 Plan included provisions for possible modification of the monitoring program after the completion of the first three years of monitoring (i.e., 2020–2022). Following the 3-year review process outlined in the 2019 Plan, PG&E sent the 2022 annual water temperature monitoring report and a draft revised Water Temperature Monitoring Plan (2023 Plan) to the resource agencies on February 1, 2023 for review and discussion during a meeting with the resource agencies on February 23, 2023. As a result of the meeting, PG&E modified the draft 2023 Plan and provided it to the resource agencies for comment and review on May 10, 2023. On May 11, 2023, PG&E sent a letter to California SWRCB’s Deputy Director requesting concurrence that the 2023 Plan remains consistent with WQC condition 10. In a series of emails, California Department of Fish and Wildlife (CDFW) and United States Fish and Wildlife Service (USFWS) recommended on May 3, 2023 that Station WT-6 be retained as its reading differed from Station WT-5 regularly; the retention of Station WT-6 was reflected in the final 2023 Plan. On May 11, 2023, CDFW approved the revisions but added a request to document the reasoning behind the removal of Stations WT-1 and WT-2. On May 15, 2023, USFWS made a similar request regarding station removal documentation, but otherwise approved the 2023 Plan. On June 1, 2023, the Forest Service concurred with the revisions with no additional comments. On June 7, 2023, PG&E confirmed that the revision rationale regarding Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 2 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company station elimination would be documented in their transmittal letter to the Commission. A letter approving the 2023 Plan was issued by the California SWRCB on February 8, 2024, and filed with the Commission on February 9, 2024, without modifications or additional comments. The monitoring presented in this annual report was conducted in accordance with the 2023 Water Temperature Monitoring Plan (PG&E 2023b) that was approved by FERC order on March 26, 2024 (Appendix A). 1.1 PROJECT SETTING The North Fork Feather River (NFFR) watershed, which is located in northeastern California (see Figure 1) within the greater Sacramento River watershed, drains a substantial portion of the eastern Sierra-Cascade geomorphic area in California. The NFFR extends from its headwaters on the southeastern slope of Lassen Peak to Lake Oroville, while traversing Lassen, Plumas, and Butte counties. The North, Middle, and South forks of the Feather River flow into Lake Oroville (formed by Oroville Dam); the confluence of these tributaries is contained within the reservoir, so the main stem of the Feather River flows out of Lake Oroville. The Poe Project is located on the North Fork Feather River in Butte County California (Figure 1). Water enters the Poe Project from a series of major hydroelectric facilities that utilize water in the NFFR and its tributaries. These projects include the Licensee’s Upper North Fork Feather River Hydroelectric Project (FERC Project No. 2105, UNFFR Project), Rock Creek-Cresta Hydroelectric Project (FERC Project No. 1962, RCC Project), and Bucks Creek Hydroelectric Project (FERC Project No. 619). The monitoring area encompasses approximately ten miles of the lower NFFR immediately upstream of Lake Oroville (FERC Project No. 2100), which is operated by the California Department of Water Resources). Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 3 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Figure 1. Location of the Poe Hydroelectric Project in northeastern California. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 4 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water in the NFFR is diverted to Poe Powerhouse from the Poe Diversion Dam via a tunnel (Figure 2). Between the Poe Diversion Dam and Poe Powerhouse is an 8.0-mile section of the natural run of the NFFR, the Poe Bypass Reach (Poe Reach). Water temperature was monitored in the Poe Reach during the relicensing of the project in 1999, 2000, and 2003. The data collected is included in Appendix E2-3 of the application for the new license for the Poe Project (PG&E 2003). In addition, water temperature was measured annually in the Poe Reach from 2003-2018 coincident with the temperature monitoring required by Condition 4C in the Section 401 Water Quality Certification for the RCC Project. These data, are summarized in the 2020 annual report (PG&E 2021), which was the first annual report submitted under the 2019 Plan (PG&E 2019a). The results of the 2020, 2021, 2022, and 2023 water temperature monitoring efforts, which were all conducted according to the 2019 Plan (PG&E 2019a), are included in annual reports (PG&E 2021, 2022, 2023 and 2024, respectively). 1.2 GOAL AND OBJECTIVES The goal of the water temperature monitoring program is to document temperature in the Poe Reach following changes in minimum instream flow (MIF) rates in accordance with the 2018 FERC license. The temperature data from this monitoring effort will be made available for other biological monitoring efforts, such as the Poe Bypass Reach Fish and Benthic Macroinvertebrate Monitoring Plan (PG&E 2019b) and the Poe Amphibian Monitoring Plan (PG&E 2020). The specific objectives of the water temperature monitoring program are to: 1. Describe seasonal and daily water temperature regimes at multiple locations along the Poe Reach from April 1 through October 31 of each year of the license, or until deemed necessary by the SWRCB. If safe access to the monitoring sites is not possible by April 1, the temperature monitoring equipment will be installed as soon as it is safe to access the sites. 2. Provide an annual report that includes water temperature and corresponding flows measured in the Poe Reach, to the Agency Representatives, following the completion of each annual monitoring campaign. 3. Evaluate the water temperature data no later than 12 years after implementation of the new Canyon Dam flow releases associated with the UNFFR Project to determine if changes in instream flows are needed. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 5 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 1.3 SCOPE OF REPORT The 2024 water temperature monitoring report follows the requisites outlined in the 2023 Water Temperature Monitoring Plan (PG&E 2023b) to include a description of: • Sampling locations • Monitoring methods • QA/QC findings • Monitoring results (tabular summary and graphic presentation) • Problems encountered. • History of temperature data collected from field studies since 2003. 1.4 CONSULTATION Documentation of consultation with the regulatory agencies will be added to this report after receiving comments and following the annual meeting scheduled for XXX XX, 2025. Results of any consultation will be included in Appendix F. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 6 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 2.0 METHODS SUMMARY 2.1 WATER TEMPERATURE MONITORING 2.1.1 Sampling Locations Water temperature was monitored at four locations in the Poe Reach extending from downstream of Poe Dam to downstream of Poe Powerhouse. Table 1 provides details for all Poe water temperature monitoring stations. Figure 2 shows the location of all monitoring stations in the 2023 Water Temperature Monitoring Plan. 2.1.2 Water Temperature Measurement Water temperature was continuously monitored from April through October 2024. All thermographs/data-loggers were set to record/store instantaneous water temperature at 15-minute intervals. Stored data were downloaded during monthly site visits and processed to generate hourly average and daily maximum, minimum, and mean water temperature values. Water temperature sensors were deployed in well-mixed areas of the stream with elevated velocity and adequate depth to ensure representative measurements. Each water temperature recorder was deployed inside a protective metal housing that was locked to the stream bank or in-channel substrate with a steel chain/cable. All monitoring locations were chosen based on safe accessibility and acceptable security from vandalism or theft. The 2024 monitoring program used Starmon Mini data-loggers at all locations. The Starmon Mini loggers are capable of recording temperatures accurately to ± 0.1°C, between -2°C and 40°C. A record of data-logger/sensor deployment is contained in Table B-1 (Appendix B). 2.2 QUALITY ASSURANCE AND CONTROL PROCEDURES To verify the operation and accuracy of the temperature recorders, all units were calibrated using an American Society for Testing and Materials (ASTM) reference thermometer, both prior to and following removal from in situ deployment. All instruments were calibration adjusted to achieve a maximum instrument error of approximately 0.1C. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 7 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table 1. Water Temperature Monitoring Locations and Descriptions for the Poe Project. Site ID Site Description Monitoring Status Near Historic Monitoring Points Approximate Location (UTM NAD 83) Latitude Longitude WT 1 Downstream of Poe Dam Discontinued after 2023 Near Relic Site Poe 5; NF 17 39°48'31.5"N 121°26'5.8"W WT 2 Upstream of Mill Creek Discontinued after 2023 Near FYLF Site 4a-d 39°48'19.6"N 121°26'23.1"W WT 3 At Pulga Bridge, NF-23 Active Pulga Bridge; Near NF-23; Near Relic Site FVC 39°47'41.2"N 121°27'6.1"W WT 4 Upstream of Bardees Bar Active Near Relic Site Poe 6; Near FYLF 3 a-b 39°46'10.9"N 121°27'24.4"W WT 5 Upstream of Poe Powerhouse Active Near Relic Site Poe 3; Near FYLF Site 2 a; NF 18 39°43'26.0"N 121°28'15.5"W WT 6 Downstream Poe Powerhouse Active Located on exclusion buoy upstream of railroad bridge 39°43'5.3"N 121°28'13.1"W Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 8 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Figure 2. Monitoring stations in the 2023 Water Temperature Monitoring Plan. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 9 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company All quality assurance and control practices outlined in Pacific Gas and Electric Company’s Quality Assurance Program Plan (QAPP, PG&E 2018) were followed during the 2024 monitoring effort. The calibration and QA/QC information associated with the water temperature monitoring effort is also included in Table B-2 (Appendix B). 2.3 POE REACH STREAM FLOW Project-specific powerhouse and in-stream flows were obtained from existing PG&E permanent monitoring stations. Stream flows in the Poe Reach are monitored at PG&E Gage No. NF-23 (USGS Gage No. 11-4045.00). Flow data from Poe Powerhouse is from internal PG&E generation data. A description of the methods used to collect data at these two locations is beyond the scope of this document. 2.4 POE PROJECT METEOROLOGY Meteorological conditions in the project area were defined using data from stations located at Poe Powerhouse. As stipulated in the 2023 Plan (PG&E 2023b), a meteorological monitoring station was installed at Poe Powerhouse on April 15, 2021. This station monitors conditions at the terminal end of the Poe Reach. Meteorological parameters include air temperature, wind speed and direction, relative humidity, and solar radiation. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 10 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.0 RESULTS 3.1 MONITORING ISSUES There were no issues with instrument operation or vandalism in 2024. 3.2 2024 WATER YEAR TYPE The North Fork Feather River watershed runoff conditions are often different from those characterizing the greater Sacramento River Basin as defined in the DWR runoff index. Conditions in 2024 reflected this dichotomy. The Department of Water Resource (DWR) classified 2024 as an “Above Normal” year with regard to the greater Sacramento River Basin (CDEC 2024). In accordance with Condition No. 5B (Water Year Type) of the RCC Project license (FERC 2001), however, the 2024 water year was classified as “Normal” based on the May 1 estimated inflow to Lake Oroville (DWR Bulletin 120 May 2024). 3.3 WATER TEMPERATURE MONITORING In 2024 water temperatures were continuously monitored from April 1 through October 31 at the four locations identified in the 2023 Plan (WT-3, WT-4, WT-5, WT-6). Monthly statistics for each station are included in Table 2. Additional details can be found in Appendix C1. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 11 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table 2. Summary of 2024 continuous water temperature monitoring in the Poe Project. Water Temperature (°C) Daily Statistic1 Data Station Month Maximum Minimum Mean Range2 Days WT-3 April 11.7 7.1 9.9 1.0 30 May 16.0 8.5 12.9 0.8 31 June 19.8 16.3 18.2 1.2 30 July 22.1 19.8 20.9 1.4 31 August 21.4 18.1 20.1 1.2 31 September 19.3 17.2 18.2 1.4 30 October 17.5 11.8 15.0 0.9 31 Period Statistics 22.1 7.1 16.5 1.1 WT-4 April 11.9 7.3 10.1 0.9 30 May 16.1 8.9 13.2 1.1 31 June 20.1 16.5 18.5 1.9 30 July 22.4 20.0 21.2 2.3 31 August 21.6 18.3 20.3 2.0 31 September 19.7 17.5 18.4 1.9 30 October 17.5 12.0 15.3 1.1 31 Period Statistics 22.4 7.3 16.7 1.6 WT-5 April 12.1 7.6 10.4 1.3 30 May 16.5 9.2 13.5 2.2 31 June 20.6 16.9 18.9 2.8 30 July 23.1 20.5 21.8 2.8 31 August 22.0 18.5 20.7 2.5 31 September 20.1 17.7 18.8 2.1 30 October 17.8 12.1 15.4 1.3 31 Period Statistics 23.1 7.6 17.1 2.1 WT-6 April 11.8 8.5 10.7 0.9 21 May 16.0 8.8 13.0 1.0 31 June 20.0 16.4 18.4 1.4 30 July 22.2 19.9 21.0 1.2 31 August 21.6 18.1 20.2 0.9 31 September 19.4 17.1 18.3 0.7 30 October 17.5 12.1 15.3 0.9 31 Period Statistics 22.2 8.5 17.0 1.0 1. Monthly summary statistics are based on daily average water temperatures. 2. Range is the difference between maximum and minimum hourly average water temperature for each day and represents the monthly average diel thermal cycle. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 12 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.3.1 Station WT-3 Station WT-3 is located approximately 1.5 miles downstream of the Poe Dam and co-located with the NF-23 flow gage station. This station represents conditions downstream of the two tributary streams (i.e., South Branch Mill Creek, Flea Valley Creek) and prior to the UNFFR entering the high-gradient segment of the Poe Reach. Mean daily water temperatures at WT-3 for the period April 1 through October 31 ranged from 7.1 to 22.1C (Table 2). The maximum hourly average temperature (22.7C) occurred on July 23, 2024 (Appendix C1). This station is downstream of all inflow from the two major tributaries, and some distance downstream of the dam. The diel range in temperatures averaged 1.1°C (Table 2). Figure 3 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-3. Figure 3. Daily maximum, minimum, and average water temperatures NFFR at Pulga Bridge (Station WT-3) – 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 13 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.3.2 Station WT-4 Station WT-4 is located approximately 3.5 miles downstream of the Poe Dam, near Bardees Bar. This station represents conditions in the middle of the Poe Reach. Mean daily water temperatures at WT-4 for the period June 1 through October 31 ranged from 7.3 to 22.4C (Table 2). The maximum hourly average temperature (23.7C) occurred on July 23, 2024 (Appendix C1). This station is located at the end of the high-gradient river segment and the beginning of the open canyon topography characteristic of the mid and lower end of the Poe Reach. As a result, the diel range in temperatures is larger than WT-3, with average diel fluctuation of 1.6°C (Table 2). Figure 4 presents daily maximum, minimum, and mean hourly average water temperatures from Station WT-4. Figure 4. Daily maximum, minimum, and average water temperatures NFFR at Bardees Bar (Station WT-4) – 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 14 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.3.3 Station WT-5 Station WT-5 is located approximately 7.6 miles downstream of the Poe Dam and 0.26 miles upstream of any inflow from Poe Powerhouse. This station represents conditions at the terminal end of the Poe Reach. Mean daily water temperatures at WT-5 for the period April 1 through October 31 ranged from 7.6 to 23.1C (Table 2). The maximum hourly average temperature (24.5C) occurred on July 23, 2024 (Appendix C1). This location represents the longest travel distance between stations. The diel range at this station was larger than WT-4, with an average diel fluctuation of 2.1°C (Table 2). Figure 5 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-5. Figure 5. Daily maximum, minimum, and average water temperatures NFFR above Poe Powerhouse (Station WT-5) – 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 15 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.3.4 Station WT-6 Station WT-6 is located approximately 8.2 miles downstream of the Poe Dam and 0.29 miles downstream of the inflow from Poe Powerhouse. This station represents conditions in the NFFR after flows from the Poe Reach and Poe Powerhouse have been fully mixed. Mean daily water temperatures at WT-6 for the period April 1 through October 31 ranged from 8.5 to 22.2C (Table 2). The maximum hourly average temperature (23.1C) occurred on July 24, 2024 (Appendix C1). The thermal regime at this station is downstream of the large inflow from the Poe Powerhouse, and as a result, the diel range in temperatures is less than those observed at stations in the middle and end of the Poe Reach (WT-4 and WT-5). The average diel fluctuation at Station WT-6 was 1.0°C (Table 2). Figure 6 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-6. Figure 6. Daily maximum, minimum, and average water temperatures NFFR below Poe Powerhouse (Station WT-6) – 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 16 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.4 COMPARISON OF WATER TEMPERATURES IN POE PROJECT The mean daily water temperatures from each station monitored in 2024 are compared in Figure 7 along with mean daily air temperature measured at the Poe Powerhouse. This figure illustrates the similar temperature response in the upper and middle segments of the Poe Project (WT-3 to WT- 4) and the influence of ambient air temperature on water temperature. The thermal regime in each segment of the Poe Reach was evaluated with a focus on the June through August period. As previously discussed, water temperatures at the first three stations (WT- 1, WT-2, WT-3) were essentially the same with no measurable effect from the tributaries (PG&E 2024), consequently WT-3 will be used as the initial condition for all subsequent analyses. Mean daily water temperatures at Station WT-4 (midway through Poe Reach) ranged from 0.2°C cooler to 0.7°C warmer than those observed at WT-3. This small differential indicates there is minimal change at the midway point through the reach, indicative of travel time less than a complete diel cycle. Mean daily temperatures at the terminal station in the Poe Reach (WT-5), exhibited values that trend with the other stations, but were warmer than the upstream reaches for the June through August period. Mean daily water temperatures at WT-5 ranged from 0.2°C cooler to 1.5°C warmer than those observed at WT-3. This difference is a result of the extended travel time and conditions promoting thermal equilibrium. Water temperature at all stations throughout the reach began to converge at the end of September (Appendix C1). Mean daily water temperatures downstream of the Poe Powerhouse were similar in value and range to those observed in the upper reaches of the project. This is to be expected as the immediate source of flow for both WT-3 and the Poe Powerhouse is Poe Reservoir. Conditions at WT-6, approximately 0.25 miles downstream of Poe Powerhouse, are driven by the high flows coming from the powerhouse. Mean daily water temperatures at WT-6 ranged from 0.3°C cooler to 0.6°C warmer than those observed at WT-3 (initial condition). Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 17 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Figure 7. Comparison of daily average water temperature from the Poe Project of the NFFR with mean daily air temperatures from Poe Powerhouse - 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 18 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.5 MAXIMUM WEEKLY AVERAGE TEMPERATURE (MWAT) The maximum weekly average temperature (MWAT), which is the maximum 7-day average value measured during a specified monitoring period, is a method of roughly identifying habitat suitability for identified species. The MWAT is a useful index for identifying the maximum temperatures in a stream reach, without being overly influenced by the extremes of a single day. The MWAT value for each month (April through October) and for the duration of the 2024 monitoring period for each station are presented in Table 3. The annual MWAT value for the initial condition (WT-3: below Poe Dam) in 2024 was 21.6°C. For the terminal condition in the Poe Reach (WT-5: upstream of Poe Powerhouse), the MWAT in 2024 was 22.5°C. Figure 8 compares the running seven-day average water temperature for each station during the 2024 monitoring period. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 19 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table 3. Summary of maximum weekly average water temperature (by month) and the absolute maximum weekly average temperature (MWAT) for each station monitored in 2024. Station Month MWAT Station Month MWAT WT-3 April 11.4 WT-4 April 11.7 May 15.0 May 15.2 June 19.2 June 19.5 July 21.6 July 21.9 August 21.1 August 21.3 September 19.2 September 19.4 October 17.5 October 17.7 MWAT 21.6 MWAT 21.9 WT-5 April 11.9 WT-6 April 11.6 May 15.6 May 15.1 June 19.9 June 19.4 July 22.5 July 21.8 August 21.8 August 21.3 September 19.9 September 19.2 October 17.9 October 17.7 MWAT 22.5 MWAT 21.8 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 20 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Figure 8. Weekly (7-Day) running average water temperature at each station monitored in 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 21 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 3.6 2024 STREAM FLOW 3.6.1 Poe Reach Flow releases from the Poe Dam to the Poe Reach (as measured at Gage NF-23) during the 2024 monitoring period (April through October) are summarized in Table 4. In-stream flows at Gage NF-23 during the 2024 monitoring period ranged from 89 to 4,455 cfs. The average flow for the monitoring period was 1,098 cfs. The minimum value of 89 cfs occurred during a FERC-approved flow reduction to facilitate fishery studies in the bypass reach. Figure 9 compares mean daily flows from the NF-23 location with those from the Poe Powerhouse. A complete listing of hydrologic data used in this section is contained in Appendix D. 3.6.2 Poe Powerhouse Diversion flows are routed from Poe Reservoir through a tunnel to Poe Powerhouse, approximately 8.0 miles downstream of the dam. Flow through Poe Powerhouse during the 2024 monitoring period (April through October) are summarized in Table 4. Average daily discharge through the powerhouse for the 2024 monitoring period was 2,088 cfs and ranged from 111 to 3,852 cfs (Figure 9). A complete listing of hydrologic data used in this section is contained in Appendix D. 3.7 2024 METEOROLOGY Project-specific meteorology from the Poe Powerhouse station for the 2024 monitoring period are included in Table E-1 and E-2 (Appendix E). The peak mean daily air temperature for the period, which was 29.6°C, was recorded on July 24, 2024 (Table E-1). Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 22 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table 4. Summary of Poe Project flow during the 2024 monitoring period. Daily Average Data Station Description Month Maximum Minimum Mean Station NF-23 Flow (cfs) April 4455 1283 2783 (Release to Poe Reach) May 3016 1166 1771 June 1194 493 778 July 566 457 489 August 466 448 458 September 1326 89 410 October 1585 292 966 Period Statistics 4455 89 1090 Poe Powerhouse Flow (cfs) April 3952 2504 3839 May 3859 2438 3324 June 2791 1177 1726 July 1994 864 1481 August 2398 1365 1822 September 2486 577 1724 October 2010 111 607 Period Statistics 3952 111 2070 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 23 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Figure 9. Daily average stream flow in the Poe Project area - 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 24 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 4.0 REFERENCES CDEC. 2024. California Data Exchange Center (http://cdec.water.ca.gov/). Department of Water Resources. California Regional Water Quality Control Board, Central Valley Region (CVRWQCB). 2007. The Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board Central Valley Region, Fourth Edition, revised October 2007 (with approved amendments), The Sacramento River Basin and The San Joaquin River Basin. http://www.swrcb.ca.gov/rwqcb5/water_issues/basin_plans/ Pacific Gas and Electric Company (PG&E). 2018. Pacific Gas and Electric Company’s Quality Assurance Program Plan (QAPP), Report No. 026.11.06.12 Version 5; February 1, 2011. Prepared by Land and Environmental Management, San Ramon, Ca. PG&E. 2019a. Water Temperature Monitoring Plan. Poe Hydroelectric Project, FERC Project No. 2107. Prepared by Pacific Gas and Electric Company. May 2019. Approved by FERC order on December 10, 2019. PG&E. 2019b. Poe Bypass Reach Fish and Benthic Macroinvertebrate Monitoring Plan. Prepared by Pacific Gas and Electric Company. November 2019. PG&E. 2020. Poe Amphibian Monitoring Plan. Poe Hydroelectric Project, FERC Project No. 2107. Prepared for Pacific Gas and Electric Company. Prepared by Garcia and Associates (GANDA), San Francisco, CA 94110. March 2020. PG&E. 2021. Water Temperature Monitoring – 2020 Annual Data Report. Poe Hydroelectric Project - FERC No. 2107. March 2021 Pacific Gas and Electric Company, Environmental Services. PG&E. 2022. Water Temperature Monitoring – 2021 Annual Data Report. Poe Hydroelectric Project - FERC No. 2107. March 2022 Pacific Gas and Electric Company, Environmental Services. PG&E. 2023a. Water Temperature Monitoring – 2022 Annual Data Report. Poe Hydroelectric Project - FERC No. 2107. March 2023 Pacific Gas and Electric Company, Environmental Services. PG&E. 2023b. Water Temperature Monitoring Plan. Poe Hydroelectric Project, FERC Project No. 2107. Prepared by Pacific Gas and Electric Company. May 2023. Approved by FERC order on March 26, 2024. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature 25 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company PG&E. 2024. Water Temperature Monitoring – 2023 Annual Data Report. Poe Hydroelectric Project - FERC No. 2107. March 2024 Pacific Gas and Electric Company, Environmental Services. PG&E. 2025. Hydrologic database provided by PG&E Hydro Generation Department, Pacific Gas and Electric Company. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company APPENDIX A WATER TEMPERATURE MONITORING PLAN Revised: May 2023 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature A-1 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company WATER TEMPERATURE MONITORING PLAN Revised: May 2023 Poe Hydroelectric Project FERC Project No. 2107 Pacific Gas and Electric Company May 2023 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 2 2024 Poe Water Temperature A-2 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table of Contents 1.0 Background and Introduction ..........................................................................................3 2.0 Monitoring Plan Objectives ..............................................................................................4 3.0 Study Area and Monitoring Locations ............................................................................4 4.0 Methods ...............................................................................................................................7 4.1. Equipment ................................................................................................................7 4.2. Data Collection ........................................................................................................8 4.3. QA/QC .....................................................................................................................8 5.0 Analysis ...............................................................................................................................8 6.0 Reporting ............................................................................................................................9 6.1. Annual Reports ........................................................................................................9 6.2. 3-Year Review .........................................................................................................9 6.3. After New Canyon Dam Releases are Implemented .............................................11 7.0 Literature Cited ...............................................................................................................11 List of Tables Table No. Description Page No. 3-1 Water Temperature Monitoring Site Locations at Poe Project List of Figures Figure No. Description Page No. 3-1 Water Temperature Monitoring Site Locations at Poe Project Attachments Attachment 1 FERC Article 401 Requirements Attachment 2 FERC Appendix A – Water Quality Certification Condition No. 10 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 3 2024 Poe Water Temperature A-3 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 1.0 BACKGROUND AND INTRODUCTION This Water Temperature Monitoring Plan addresses monitoring set forth in Condition 10 of Appendix A of the new license for Pacific Gas and Electric Company’s (PG&E) Poe Project, Federal Energy Regulatory Commission (FERC) Project No. 2107 issued December 17, 2018. Appendix A is the State Water Resources Control Board (SWRCB) Final 401 Water Quality Certification Conditions. The requirements are incorporated into License Article 401. Attachment 1 and 2 contain the language from the two documents as applicable to this Plan. The Poe Project is located within the North Fork Feather River Basin, which contains extensive forested lands and is sparsely populated. The “Poe Reach” or “Poe Bypass Reach” is the section of the North Fork Feather River (NFFR) from Poe Dam downstream to Poe Powerhouse. The North Fork Feather River originates from several small creeks south of Mt. Lassen Peak in northwestern Plumas County and flows through the Upper North Fork Feather River Project No. 2105 and the Rock Creek-Cresta Project No. 1962 prior to being utilized by the Poe Project. Waters of the Poe Project include the Poe Reservoir, a 7.62-mile-long bypassed reach, and the Big Bend Reservoir, which serves as the afterbay for the project. The Poe powerhouse and Big Bend Reservoir are located just upstream of Lake Oroville, the primary storage reservoir for the Feather River Project No. 2100. Water temperature monitoring in the Poe Bypass Reach was completed in 1999, 2000 and 2003, during the relicensing effort for the project. The data collected is included in Appendix E2 -3 of the application for the new license for the Poe Project (PG&E 2003). In addition, water temperature has been measured annually in the Poe Bypass Reach from 2003-2018 coincidently with the temperature monitoring required by Condition 4C in the Rock Creek-Cresta Project (FERC No. 1962). Data collected from 1999, 2000 and 2003 was summarized in the first annual Water Temperature Report submitted in 2020 under the original Water Temperature Monitoring Plan for the current Poe Project license. The original Water Temperature Monitoring Plan (2019) developed for the current Poe Project license had provisions for agencies to make adjustments to the monitoring plan following the third year of monitoring. In March 2023 after consultation with Plumas County, Butte County, Forest Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 4 2024 Poe Water Temperature A-4 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Service, CDFW, USFWS, and SWRCB (collectively “government agencies”), it was agreed that two of the six monitoring stations should be removed because of safety concerns and potential impacts to Foothill Yellow Legged Frog habitat. This revised Water Temperature Monitoring Plan (2023) is an updated version of the 2019 Water Temperate Monitoring Plan. The revised plan reflects the change in monitoring from six to four of the original water temperature monitoring stations. 2.0 MONITORING PLAN OBJECTIVES The goal of the water temperature monitoring program is to document temperature in the Poe Bypass Reach following changes in flow rates in accordance with the new FERC license. The temperature data from this monitoring effort will be made available for other biological monitoring efforts, such as the Poe Bypass Reach Fish and Benthic Macroinvertebrate Monitoring Plan and the Foothill Yellow-Legged Frog Monitoring Plan. Specific objectives are: 1. Describe seasonal and daily water temperature regimes at multiple locations along the Poe Bypass Reach from April 1 through October 31 of each year of the license, or until deemed necessary by the SWRCB. If safe access to the monitoring sites is not possible by April 1, the temperature monitoring equipment will be installed as soon as it is safe to access the sites. 2. Provide an annual report that includes water temperature and corresponding flows measured in the Poe bypass reach, to the Agency Representatives, following the completion of each annual monitoring campaign. 3. Evaluate the water temperature data no later than 12 years after implementation of the new Canyon Dam flow releases associated with the UNFFR Project to determine if changes in instream flows are needed. 3.0 STUDY AREA AND MONITORING LOCATIONS Water temperature will be monitored at four (4) sites along the North Fork Feather River below Poe Dam. Table 3-1 provides details of each site. These four monitoring sites were determined in consultation with government agencies using information on proximity to release point, presence of isothermal water column, logistics, and channel morphology. Figure 3 -1 depicts the location of the Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 5 2024 Poe Water Temperature A-5 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company monitoring site and primary tributaries. The monitoring sites are distributed across the bypass reach to capture the influence of accretion flow, project operations and the cumulative distance from Poe Dam. Meteorological data will be collected at Poe Powerhouse including air temperature and relative humidity. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 6 2024 Poe Water Temperature A-6 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table 3-1. Water Temperature Monitoring Site Locations at Poe Project Notes: D/S = Downstream U/S = Upstream Relic = Abbreviation for Relicensing Application (PG&E 2003) NF 17 and NF 18 are monitoring sites used in Rock Creek-Cresta License (FERC No. 1962) River Mile Below Poe Dam (RM) Latitude Longitude WT 3 D/S of Flea Valley Creek Pulga Bridge; Near NF-23; Near Relic Site FVC 1.4 39°47'45.27"N 121°27'2.76"W WT 4 U/S of Bardees Bar Near Relic Site Poe 6; Near FYLF 3 a-b 3.34 39°46'17.29"N 121°27'20.26"W WT 5 U/S of Poe PH Near Relic Site Poe 3; Near FYLF Site 2 a; NF 18 7.17 39°43'41.55"N 121°28'5.58"W WT 6 D/S Poe PH 7.91 39°43'5.34"N 121°28'12.21"W Site ID Site Description Near Historic Monitoring Points Approximate Location (UTM NAD 83) Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 7 2024 Poe Water Temperature A-7 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Figure 3-1. Schematic of Water Temperature Monitoring Site Locations at Poe Project 4.0 METHODS 4.1 Equipment All four (4) sites will be monitored for water temperature using calibrated temperature sensors. They will be deployed annually at all sites by March 25, or at the earliest date thereafter when access is determined safe due to river flow. Sensors will be retrieved after November 5 each year, unless forecast Poe Reservoir Lake Oroville Poe PH Bardee’s Bar Reservoir Tunnel Ephemeral Unimpaired Flow Perennial Unimpaired Flow Regulated Flow Water Temperature monitoring WT4 WT5 Big Bend Reservoir WT6 WT3 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 8 2024 Poe Water Temperature A-8 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company storms warrant earlier removal due to safe river access. This will ensure that water temperatures are measured during the warmest period of the year. Two temperature sensors will be installed at each site to guard against data loss in the event of equipment failure or drift. The sensors will be deployed in water that is well -mixed, typically at the head of a shallow pool just below a riffle input. Each sensor will be secured in the stream and shielded to assure that the sensor stays submerged and is not exposed to direct sunlight. 4.2 Data Collection Water temperature data will be collected at 15-minute intervals and downloaded at least once every two months for the duration of the monitoring period each year. All raw and processed electronic data will be stored in PG&E archives. 4.3 QA/QC Quality control calibrations will be performed on each temperature sensor in a laboratory setting at the end of each monitoring period. The minimum accuracy of all digital recorders is expected to be ± 0.1°C between 5°C and 40°C. A summary of applicable QA/QC certificates will be included with each annual report. Data downloaded in the field from each sensor will be subject to review by PG&E technicians or their contractors. Suspected erroneous data will be identified in annual reports. When temperature sensors are retrieved at the end of each monitoring season, they will be calibrated. Data from sensors that meet calibration requirements will be used in annual reports. The report will also include a list of sensors that failed post-use calibration. Calibration records will be stored in PG&E archives. This review, along with graphical analysis and routine equipment inspection, will ensure that proper data is made available for the annual reports. 5.0 ANALYSIS All data will be summarized to include daily mean, minimum, maximum and maximum weekly average (MWAT) temperatures in degrees Celsius (°C). Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 9 2024 Poe Water Temperature A-9 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 6.0 REPORTING 6.1 Annual Reports Study deliverables will include an annual written report covering the Poe Bypass Reach river water temperature monitoring, including average daily flow measured at Gaging Station NF-23. The report will include a description of the sampling locations, methods, QA/QC findings, monitoring results depicted graphically and tabularly, and any problems encountered. PG&E will submit a draft annual water temperature monitoring report to the above named government agencies following the conclusion of each calendar year, covering the results of monitoring throughout that year. To establish a consistent template for repo rting, prior to submission of the first year report, the format and content of the report was discussed and agreed to with the government agencies. The first year report also provided a history of temperature data collected in field studies since 2003. PG&E will attempt to provide the draft report to the agencies before March 1. and allow the government agencies at least 30 days to review and comment on the draft report. PG&E will set up a consultation meeting if requested by government agencies. Electronic data (in Excel or comparable format) water temperature and flow data will be provide to government agencies, and to other parties upon request. The final annual report will be filed with FERC by June 30. PG&E will include in the final report any comments and recommendations made by the agencies on the draft report. If PG&E does not adopt a recommendation, the filing shall include PG&E’s reasons based on project-specific information. 6.2 3-Year Review As per SWRCB Condition 10, after completion of the first three years of monitoring, the plan was reviewed by Agency Representatives for possible modifications. To support the 3-year review effort, PG&E started discussions with Agency Representatives after two years of data were collected. After the third year of data was collected, PG&E provided the draft annual report to the government agencies by February 1, 2023 to determine if changes in monitoring locations are necessary. PG&E set up a meeting with the government agencies in February 2023 to review the Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 10 2024 Poe Water Temperature A-10 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company draft report and discuss whether changes in monitoring locations or the monitoring plan were necessary. Since changes in locations were recommended, PG&E worked with the government agencies, the Deputy Director, and FERC to seek approval to make changes prior to the next monitoring year (i.e., 2024). As required by FERC License Article 401 (a), if modifications to the Plan are prescribed, the Licensee will seek approval by submitting to FERC the request with consultation documentation from the Agency Representatives and approval from the Deputy Director. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Poe Project (FERC No. 2107) Water Temperature Plan Page 11 2024 Poe Water Temperature A-11 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company 6.3 After New Canyon Dam Releases are Implemented No later than 12 years following implementation of the new Canyon Dam flow releases (in FERC No. 2105 License), the Licensee shall provide a report on water temperature data and the outcome of the consultation to the Deputy Director that includes: (i) a recommendation regarding whether a change to instream flows is appropriate; (ii) the proposed instream flows, if such changes are recommended; (iii) comments and recommendations made in connection with the consultation; and (iv) a description of how the Licensee's recommendation incorporates or address agency comments and recommendations. Per, FERC License Article 401 (d), if the report prescribes any modifications to flows then the Licensee an amendment request will be submitted to FERC with consultation documentation from Agency Representatives and approval from the SWRCB Deputy Director. 7.0 LITERATURE CITED Federal Energy Regulatory Commission (FERC). 2018. Order Issuing New License. Project No. 2107-016. Prepared by Federal Energy Regulatory Commission, Office of Energy Projects, Division of Hydropower Licensing. Washington, DC. December 17, 2018. Pacific Gas and Electric Company (PG&E). 2003. Poe Hydroelectric Project, FERC No. 2107, Application for New License (Volume 1 of 4). December 2003. State Water Recourses Control Board (SWRCB). 2017. Pacific Gas and Electric Company Poe Hydroelectric Project. Federal Energy Regulatory Commission Project No. 2107. Water Quality Certification. December 28, 2017. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature A-12 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company ATTACHMENT 1 FERC Article 401 – Commission Approval, Reporting, Notification, and Filing of Amendments (FERC 2018) (a) Requirement to File Plans for Commission Approval The State Water Resources Control Board’s (Water Board) section 401 water quality certification (WQC) (Appendix A) and the U. S. Department of Agriculture – Forest Service’s (Forest Service) section 4(e) conditions (Appendix B) require the licensee to prepare plans in consultation with other entities for approval by the Water Board or Forest Service or for submittal to the Commission, and implement specific measures without prior Commission approval. The following plans must also be submitted to the Commission for approval by the deadlines specified below: Water Board WQC Condition No. Forest Service 4(e) Condition No. Plan Name Commission Due Date 10 - Temperature monitoring plan Within 6 months from license issuance *excerpt from FERC 2018 Article 401 With each plan filed with the Commission, the licensee must include documentation that it developed the plan in consultation with the above-listed agencies and provide copies of any comments received, as well as its response to each comment. The Commission reserves the right to make changes to any plan filed. Upon Commission approval, the plan becomes a requirement of the license, and the licensee must implement the plan, including any changes required by the Commission. Any changes in the above schedule or plans require approval by the Commission before implementing the proposed change. (b) Requirements to File Reports. Certain conditions of the Water Board WQC in Appendix A and the Forest Service’s section 4(e) conditions in Appendix B require the licensee to file reports with other entities. Because these reports relate to compliance with the requirements of this license, each such report must also be submitted to the Commission. These reports are listed in the following table: Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature A-13 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Board WQC Condition No. Forest Service 4(e) Condition No. Plan Name Commission Due Date 10 - Temperature monitoring report 12 years following implementation of the new Canyon Dam instream flow releases associated with Project No. 2105 relicensing *excerpt from FERC 2018 Article 401 With each report filed with the Commission, the licensee must include documentation of consultation with the agencies specified in the conditions noted above and provide copies of any comments received, as well as its response to each comment. The Commission reserves the right to require changes to project operation or facilities based on the information contained in the report and any other available information. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 2024 Poe Water Temperature A-14 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company ATTACHMENT 2 FERC Appendix A Water Quality Certification Condition No. 10 Within six months of license issuance, the Licensee shall file a Temperature Monitoring Plan with the Deputy Director for review and approval. The Temperature Monitoring Plan shall be developed in consultation with Butte County, Plumas County, USFWS, Forest Service, CDFW, and State Water Board staff. The Deputy Director may require modifications as part of any approval. The Licensee shall file the Deputy Director’s approval, and any required modifications, with FERC. The Temperature Monitoring Plan shall establish how changes in temperatures as a result of increased instream flows in the Poe bypass reach will be measured. The Temperature Monitoring Plan shall include provisions for possible modification of the monitoring program after the completion of the first three years of monitoring. Where facility modification is required for temperature measurement, the Licensee shall complete such modifications no later than 18 months after license issuance. Ten years after the implementation of new Canyon Dam flow releases associated with the relicensing of the Upper North Fork Feather River Project (FERC Project No. 2105), the Licensee shall consult with Butte County, Plumas County, USFWS, Forest Service, CDFW, and State Water Board staff to evaluate the data collected under the Project’s Temperature Monitoring Plan and other related information to evaluate whether changes to the instream flows are appropriate. Consultation shall include an evaluation of potential effects related to potential instream flow changes. No later than 12 years following implementation of the new Canyon Dam flow releases, the Licensee shall provide a report on the outcome of the consultation to the Deputy Director that includes: (i) a recommendation regarding whether a change to instream flows is appropriate; (ii) the proposed instream flows, if such changes are recommended; (iii) comments and recommendations made in connection with the consultation; and (iv) a description of how the Licensee’s recommendation incorporates or address agency comments and recommendations. The Deputy Director may require implementation of the recommendation or other alternative deemed appropriate. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX B – METHODOLOGY 2024 Poe Water Temperature March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company APPENDIX B METHODOLOGY Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX B – METHODOLOGY 2024 Poe Water Temperature B-1 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table B-1. Water Temperature Data-logger Deployment Data. Data Logger Information Installation Primary Backup Date Station S/N Type S/N Type Issues 3/28/24 WT-3 L-292 Starmon T-3051 Starmon None 3/28/24 WT-4 T-3048 Starmon T-2524/3610 Starmon None 3/28/24 WT-5 L-291 Starmon T-3079 Starmon None 4/9/24 WT-6 L-290 Starmon T-3071 Starmon None Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company APPENDIX C WATER TEMPERATURE Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-1 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table C-1. Daily Summary of Hourly Average Water Temperature Water Temperature (°C) NFFR at NF-23/Pulga (WT-3) NFFR at Bardees Bar (WT-4) Date Average Maximum Minimum Average Maximum Minimum 04/01/24 8.2 8.7 7.6 8.3 8.7 7.9 04/02/24 9.3 10.0 8.5 9.2 9.8 8.7 04/03/24 9.9 10.2 9.6 10.1 10.4 9.8 04/04/24 8.5 9.5 7.6 9.4 10.4 8.5 04/05/24 7.4 7.5 7.2 7.8 8.4 7.6 04/06/24 7.1 7.3 6.8 7.4 7.6 7.3 04/07/24 7.1 7.4 6.7 7.3 7.7 6.9 04/08/24 7.8 8.3 7.3 7.8 8.6 7.3 04/09/24 8.9 9.6 8.2 8.8 9.7 8.0 04/10/24 10.1 10.7 9.5 10.0 10.7 9.2 04/11/24 10.8 11.3 10.4 10.9 11.3 10.4 04/12/24 10.6 11.0 10.1 11.1 11.5 10.8 04/13/24 9.6 10.0 9.1 10.1 10.9 9.8 04/14/24 8.4 8.9 8.1 9.0 9.8 8.6 04/15/24 8.7 9.5 8.0 8.7 9.1 8.2 04/16/24 10.0 10.5 9.4 9.9 10.4 9.2 04/17/24 10.4 11.0 10.0 10.6 10.7 10.3 04/18/24 10.9 11.4 10.4 11.0 11.2 10.7 04/19/24 11.3 11.9 10.7 11.4 11.8 11.0 04/20/24 11.5 12.1 11.0 11.8 12.1 11.3 04/21/24 11.5 12.2 10.9 11.8 12.3 11.2 04/22/24 11.6 12.2 10.9 11.9 12.4 11.3 04/23/24 11.7 12.3 11.1 11.9 12.5 11.4 04/24/24 11.4 11.8 10.9 11.7 12.5 11.3 04/25/24 11.0 11.4 10.8 11.5 12.0 11.1 04/26/24 10.3 10.6 10.1 10.8 11.3 10.3 04/27/24 10.2 10.6 9.7 10.4 10.7 10.0 04/28/24 10.9 11.4 10.3 10.9 11.2 10.5 04/29/24 11.1 11.4 10.8 11.4 11.5 11.1 04/30/24 10.8 11.2 10.6 11.1 11.5 10.8 05/01/24 10.7 11.1 10.4 11.0 11.2 10.6 05/02/24 11.2 11.5 10.9 11.3 11.8 10.7 05/03/24 11.6 12.1 11.2 11.7 12.2 11.2 05/04/24 10.1 11.8 8.7 11.3 12.2 9.4 05/05/24 8.5 8.6 8.3 8.9 9.4 8.7 05/06/24 9.5 10.1 8.6 9.3 9.9 8.7 05/07/24 10.6 11.0 10.0 10.6 11.2 9.9 05/08/24 10.9 11.1 10.7 11.1 11.6 10.8 05/09/24 11.2 11.6 11.0 11.5 12.2 10.9 05/10/24 12.0 12.4 11.5 12.0 12.8 11.1 05/11/24 12.5 13.0 12.0 12.6 13.2 12.1 05/12/24 12.9 13.4 12.5 13.1 13.5 12.5 05/13/24 13.1 13.6 12.7 13.4 13.7 13.0 05/14/24 13.2 13.8 12.8 13.5 13.8 13.2 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-2 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR at NF-23/Pulga (WT-3) NFFR at Bardees Bar (WT-4) Date Average Maximum Minimum Average Maximum Minimum 05/15/24 13.5 13.9 13.1 13.8 14.1 13.5 05/16/24 13.7 14.3 13.2 13.9 14.2 13.5 05/17/24 13.9 14.5 13.6 14.2 14.5 13.9 05/18/24 14.0 14.5 13.7 14.4 14.6 14.0 05/19/24 14.3 14.5 14.1 14.6 15.0 14.1 05/20/24 13.5 13.9 13.2 14.1 14.4 13.4 05/21/24 13.5 13.8 13.2 13.8 14.3 13.3 05/22/24 13.8 14.1 13.5 14.0 14.6 13.3 05/23/24 13.6 13.8 13.3 13.9 14.4 13.6 05/24/24 13.8 14.1 13.6 14.0 14.6 13.4 05/25/24 14.0 14.3 13.7 14.2 14.9 13.7 05/26/24 14.1 14.4 13.8 14.3 15.1 13.8 05/27/24 14.8 15.1 14.2 14.8 15.8 14.0 05/28/24 15.2 15.6 14.9 15.4 16.3 14.8 05/29/24 15.5 15.9 15.1 15.8 16.6 15.2 05/30/24 15.5 15.9 15.2 15.7 16.6 15.1 05/31/24 16.0 16.3 15.5 16.1 17.1 15.4 06/01/24 16.3 16.7 15.8 16.5 17.3 15.8 06/02/24 16.4 16.8 16.0 16.8 17.6 16.2 06/03/24 16.3 16.7 15.7 16.6 17.3 16.1 06/04/24 16.3 16.7 15.6 16.5 17.4 15.8 06/05/24 17.4 17.9 16.4 17.4 18.6 16.3 06/06/24 18.1 18.8 17.4 18.3 19.5 17.5 06/07/24 18.2 18.9 17.6 18.6 19.7 17.7 06/08/24 18.2 18.7 17.6 18.6 19.5 17.8 06/09/24 18.2 18.8 17.6 18.5 19.5 17.8 06/10/24 18.5 19.1 17.6 18.7 19.9 17.7 06/11/24 19.3 19.9 18.2 19.4 20.7 18.3 06/12/24 19.7 20.2 18.9 19.9 20.9 19.0 06/13/24 19.8 20.3 19.2 20.1 21.0 19.4 06/14/24 19.6 20.0 19.0 19.9 20.7 19.3 06/15/24 19.1 19.7 18.2 19.6 20.2 18.9 06/16/24 18.2 18.7 17.5 18.7 19.5 18.1 06/17/24 17.4 18.0 16.9 17.9 18.7 17.3 06/18/24 17.1 17.5 16.5 17.4 18.3 16.7 06/19/24 17.1 17.4 16.5 17.3 18.3 16.4 06/20/24 17.1 17.5 16.6 17.4 18.3 16.6 06/21/24 17.7 18.3 16.7 17.8 19.2 16.8 06/22/24 18.5 19.2 17.5 18.7 20.2 17.6 06/23/24 19.0 19.6 18.2 19.2 20.6 18.2 06/24/24 19.0 19.7 18.3 19.3 20.7 18.2 06/25/24 18.7 19.0 18.2 19.0 19.6 18.3 06/26/24 18.7 19.4 18.1 19.0 20.3 18.2 06/27/24 18.7 19.3 18.2 19.0 20.2 17.9 06/28/24 18.7 19.4 18.2 19.0 20.4 18.1 06/29/24 18.8 19.3 18.2 19.0 20.4 18.0 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-3 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR at NF-23/Pulga (WT-3) NFFR at Bardees Bar (WT-4) Date Average Maximum Minimum Average Maximum Minimum 06/30/24 19.5 20.3 18.8 19.7 21.3 18.6 07/01/24 19.9 20.8 19.3 20.0 21.7 19.0 07/02/24 19.8 20.6 19.2 20.1 21.5 19.3 07/03/24 20.0 20.8 19.2 20.3 21.7 19.3 07/04/24 20.1 21.1 19.2 20.5 21.9 19.2 07/05/24 19.9 21.0 19.1 20.4 21.9 19.2 07/06/24 20.3 21.1 19.3 20.6 22.1 19.4 07/07/24 20.6 20.9 19.7 20.8 22.1 19.6 07/08/24 21.2 21.7 20.6 21.5 22.9 20.5 07/09/24 21.4 22.2 20.8 21.8 23.3 20.7 07/10/24 21.2 22.0 20.6 21.6 23.1 20.5 07/11/24 21.3 22.0 20.5 21.5 23.0 20.4 07/12/24 21.7 22.5 21.0 21.9 23.5 20.8 07/13/24 21.5 21.9 21.0 21.8 22.6 20.9 07/14/24 21.4 22.3 20.7 22.1 23.1 21.4 07/15/24 21.3 22.0 20.7 21.6 22.9 20.7 07/16/24 21.2 22.0 20.6 21.6 22.8 20.8 07/17/24 21.0 21.8 20.1 21.4 22.6 20.4 07/18/24 20.5 21.3 19.9 20.9 22.3 19.8 07/19/24 20.5 21.0 19.8 20.8 22.1 19.8 07/20/24 20.8 21.3 20.0 21.0 22.4 20.1 07/21/24 21.5 22.0 20.7 21.6 23.1 20.6 07/22/24 21.8 22.4 21.2 22.1 23.5 21.1 07/23/24 22.1 22.7 21.5 22.4 23.7 21.5 07/24/24 22.1 22.6 21.5 22.4 23.3 21.7 07/25/24 21.8 22.5 21.0 22.3 23.3 21.5 07/26/24 21.3 21.9 20.5 21.6 22.9 20.6 07/27/24 20.6 21.2 19.8 21.1 21.8 20.4 07/28/24 20.1 21.0 19.5 20.6 21.9 19.6 07/29/24 20.1 20.8 19.6 20.3 21.8 19.3 07/30/24 20.2 20.8 19.6 20.4 21.8 19.4 07/31/24 20.2 20.7 19.7 20.4 21.6 19.6 08/01/24 20.6 21.2 19.9 20.7 22.1 19.9 08/02/24 20.7 21.0 20.4 20.8 21.4 20.2 08/03/24 20.7 21.4 20.4 21.1 22.0 20.6 08/04/24 20.8 21.4 20.3 21.2 22.5 20.4 08/05/24 21.3 21.8 20.6 21.3 22.8 20.5 08/06/24 21.4 22.1 20.9 21.6 23.0 20.8 08/07/24 21.2 21.8 20.6 21.4 22.7 20.4 08/08/24 21.0 21.6 20.5 21.3 22.5 20.3 08/09/24 21.0 21.6 20.5 21.2 22.5 20.3 08/10/24 20.9 21.6 20.4 21.2 22.5 20.3 08/11/24 20.8 21.3 20.3 21.0 22.3 20.2 08/12/24 20.5 21.1 20.1 20.8 21.9 20.0 08/13/24 20.5 21.2 20.0 20.7 21.9 19.8 08/14/24 20.4 21.1 19.8 20.6 22.0 19.7 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-4 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR at NF-23/Pulga (WT-3) NFFR at Bardees Bar (WT-4) Date Average Maximum Minimum Average Maximum Minimum 08/15/24 20.3 21.0 19.7 20.5 21.8 19.7 08/16/24 20.3 21.0 19.7 20.5 21.8 19.7 08/17/24 20.3 21.0 19.7 20.5 21.7 19.6 08/18/24 20.2 20.9 19.7 20.5 21.7 19.8 08/19/24 20.1 20.8 19.6 20.2 21.6 19.4 08/20/24 20.0 20.7 19.4 20.1 21.5 19.3 08/21/24 19.9 20.7 19.5 20.1 21.4 19.3 08/22/24 19.7 20.4 19.2 19.9 21.2 19.1 08/23/24 19.1 19.7 18.4 19.4 19.8 19.0 08/24/24 18.1 18.8 17.6 18.6 19.1 18.1 08/25/24 18.2 18.9 17.5 18.3 19.7 17.3 08/26/24 18.7 19.5 18.0 18.8 20.3 17.8 08/27/24 19.3 20.0 18.5 19.3 20.8 18.4 08/28/24 19.5 20.2 19.0 19.7 21.1 18.8 08/29/24 19.4 20.2 18.5 19.7 21.1 18.7 08/30/24 18.5 19.2 18.0 19.2 20.2 18.4 08/31/24 19.2 19.9 18.1 19.1 20.7 18.0 09/01/24 19.3 20.1 18.8 19.7 21.0 18.9 09/02/24 19.0 19.9 18.4 19.4 20.6 18.6 09/03/24 18.6 19.7 18.1 18.9 20.4 18.0 09/04/24 18.6 19.4 18.0 18.8 20.2 17.9 09/05/24 18.8 19.6 18.2 19.0 20.4 18.2 09/06/24 19.1 19.9 18.5 19.3 20.7 18.5 09/07/24 19.1 20.0 18.7 19.4 20.6 18.8 09/08/24 19.0 19.9 18.6 19.3 20.6 18.5 09/09/24 18.8 19.7 18.4 19.1 20.4 18.3 09/10/24 18.8 19.6 18.3 19.0 20.3 18.2 09/11/24 18.6 19.4 18.1 18.8 20.0 18.2 09/12/24 18.2 19.1 17.8 18.6 19.7 17.8 09/13/24 18.2 19.0 17.7 18.4 19.6 17.6 09/14/24 18.2 19.0 17.7 18.4 19.7 17.5 09/15/24 18.1 18.8 17.5 18.3 19.2 17.9 09/16/24 17.8 18.7 17.1 17.9 18.4 17.4 09/17/24 17.3 18.0 16.5 17.8 18.1 17.4 09/18/24 17.2 18.4 16.4 17.5 18.3 16.7 09/19/24 17.5 18.9 16.4 17.8 18.9 16.7 09/20/24 17.7 19.1 16.6 18.0 19.1 16.8 09/21/24 18.1 18.8 17.6 18.2 19.4 17.4 09/22/24 18.1 19.0 17.5 18.4 19.6 17.6 09/23/24 17.8 18.7 17.3 18.1 19.2 17.2 09/24/24 17.7 18.5 17.3 18.0 19.2 17.2 09/25/24 17.7 18.5 17.3 17.9 19.1 17.1 09/26/24 17.7 18.5 17.3 17.9 19.1 17.3 09/27/24 17.5 18.4 17.1 17.7 18.9 17.0 09/28/24 17.4 17.6 17.2 17.5 18.1 17.0 09/29/24 17.6 17.9 17.1 17.7 18.4 17.3 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-5 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR at NF-23/Pulga (WT-3) NFFR at Bardees Bar (WT-4) Date Average Maximum Minimum Average Maximum Minimum 09/30/24 17.5 18.3 16.9 17.7 18.7 16.9 10/01/24 17.2 18.2 16.8 17.5 18.6 16.6 10/02/24 17.3 18.3 16.7 17.4 18.6 16.4 10/03/24 17.5 18.4 16.9 17.5 18.7 16.6 10/04/24 17.3 18.1 17.0 17.4 18.4 16.7 10/05/24 17.3 18.1 17.0 17.5 18.7 16.7 10/06/24 17.3 18.2 16.9 17.5 18.6 16.7 10/07/24 17.1 18.0 16.6 17.4 18.4 16.7 10/08/24 16.9 17.9 16.4 17.2 18.3 16.4 10/09/24 16.5 17.3 16.0 16.8 17.7 16.1 10/10/24 16.2 17.0 15.7 16.5 17.5 15.7 10/11/24 16.0 16.8 15.6 16.2 17.2 15.4 10/12/24 15.8 15.9 15.5 15.9 16.2 15.4 10/13/24 15.7 16.0 15.4 15.9 16.5 15.6 10/14/24 16.1 16.8 15.6 16.2 17.2 15.5 10/15/24 16.2 16.6 16.1 16.4 17.0 16.0 10/16/24 16.0 16.2 15.9 16.3 16.6 16.2 10/17/24 15.7 16.1 15.4 16.1 16.5 15.6 10/18/24 14.7 15.3 13.8 15.2 15.5 14.6 10/19/24 13.5 13.8 13.2 13.9 14.5 13.5 10/20/24 13.6 13.8 13.2 13.6 14.1 13.3 10/21/24 13.9 14.1 13.7 14.0 14.5 13.7 10/22/24 13.8 14.0 13.4 14.0 14.4 13.7 10/23/24 13.4 13.6 13.0 13.7 14.0 13.4 10/24/24 13.0 13.3 12.8 13.3 13.5 12.9 10/25/24 12.9 13.1 12.7 13.1 13.3 12.8 10/26/24 12.9 13.2 12.7 13.1 13.4 12.8 10/27/24 13.0 13.2 12.8 13.2 13.4 13.0 10/28/24 13.0 13.3 12.8 13.2 13.4 12.9 10/29/24 12.5 13.0 12.1 12.9 13.2 12.6 10/30/24 12.0 12.4 11.6 12.3 12.5 12.0 10/31/24 11.8 11.9 11.6 12.0 12.2 11.8 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-6 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table C-1. Continued Water Temperature (°C) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum 04/01/24 8.5 9.2 8.0 -- -- -- 04/02/24 9.4 10.4 8.7 -- -- -- 04/03/24 10.3 10.8 9.8 -- -- -- 04/04/24 9.6 10.4 8.6 -- -- -- 04/05/24 8.0 8.6 7.6 -- -- -- 04/06/24 7.7 8.1 7.4 -- -- -- 04/07/24 7.6 8.5 7.0 -- -- -- 04/08/24 8.1 9.5 7.3 -- -- -- 04/09/24 9.1 10.7 8.0 -- -- -- 04/10/24 10.2 11.7 9.2 9.8 10.2 9.2 04/11/24 11.2 12.4 10.3 10.7 11.1 10.3 04/12/24 11.2 11.5 10.9 11.0 11.4 10.7 04/13/24 10.3 10.9 9.9 10.1 10.8 9.7 04/14/24 9.3 9.9 8.7 9.0 9.8 8.5 04/15/24 9.0 9.8 8.4 8.5 9.0 8.0 04/16/24 10.0 11.0 9.0 9.7 10.3 9.1 04/17/24 10.8 11.3 10.4 10.4 10.6 10.1 04/18/24 11.2 12.0 10.6 10.9 11.1 10.6 04/19/24 11.6 12.2 11.2 11.3 11.7 10.9 04/20/24 12.0 12.4 11.6 11.7 12.0 11.2 04/21/24 12.0 12.3 11.5 11.7 12.1 11.1 04/22/24 12.1 12.4 11.6 11.8 12.3 11.2 04/23/24 12.1 12.4 11.7 11.8 12.3 11.3 04/24/24 12.0 12.5 11.6 11.8 12.4 11.5 04/25/24 11.7 12.0 11.3 11.4 11.9 11.0 04/26/24 11.0 11.3 10.5 10.7 11.2 10.3 04/27/24 10.7 11.2 10.3 10.3 10.6 9.9 04/28/24 11.1 12.1 10.4 10.8 11.2 10.4 04/29/24 11.6 12.3 11.1 11.3 11.5 11.0 04/30/24 11.4 12.1 10.8 11.0 11.4 10.7 05/01/24 11.2 12.1 10.7 10.8 11.2 10.6 05/02/24 11.5 12.9 10.6 11.1 11.4 10.8 05/03/24 12.0 13.3 11.2 11.5 11.8 11.3 05/04/24 11.4 12.2 9.7 11.2 12.1 9.6 05/05/24 9.2 9.5 8.8 8.8 9.4 8.5 05/06/24 9.5 10.6 8.7 9.1 9.8 8.6 05/07/24 10.8 12.0 9.9 10.4 10.9 9.8 05/08/24 11.4 12.6 10.7 10.9 11.2 10.7 05/09/24 11.8 13.3 10.8 11.4 12.1 10.9 05/10/24 12.3 13.9 11.1 11.8 12.5 11.1 05/11/24 13.0 14.5 12.1 12.4 12.6 12.0 05/12/24 13.4 14.7 12.5 12.9 13.2 12.5 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-7 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum 05/13/24 13.7 14.8 13.0 13.1 13.5 12.7 05/14/24 13.8 14.8 13.2 13.3 13.6 13.0 05/15/24 14.1 15.2 13.4 13.6 14.0 13.2 05/16/24 14.3 15.3 13.7 13.7 14.0 13.3 05/17/24 14.6 15.6 13.9 14.0 14.3 13.7 05/18/24 14.7 15.7 14.1 14.2 14.7 13.9 05/19/24 14.9 15.9 14.1 14.5 15.0 14.2 05/20/24 14.5 15.3 13.6 14.1 14.4 13.4 05/21/24 14.1 15.3 13.2 13.8 14.3 13.3 05/22/24 14.3 15.7 13.2 13.9 14.6 13.4 05/23/24 14.2 15.5 13.4 13.9 14.3 13.6 05/24/24 14.3 15.8 13.3 14.0 14.6 13.5 05/25/24 14.5 16.0 13.6 14.1 14.7 13.8 05/26/24 14.7 16.3 13.6 14.2 15.0 13.9 05/27/24 15.2 17.0 13.9 14.7 15.6 14.0 05/28/24 15.8 17.5 14.6 15.3 16.2 14.8 05/29/24 16.1 17.8 15.1 15.7 16.7 15.1 05/30/24 16.1 17.8 14.9 15.7 16.6 15.3 05/31/24 16.5 18.3 15.2 16.0 17.1 15.5 06/01/24 16.9 18.6 15.7 16.4 17.4 15.8 06/02/24 17.2 18.7 16.1 16.6 17.4 16.2 06/03/24 16.9 17.9 16.2 16.5 17.0 16.1 06/04/24 17.1 18.6 15.9 16.4 17.4 15.8 06/05/24 17.7 19.7 16.3 17.3 18.5 16.3 06/06/24 18.8 20.6 17.4 18.2 19.4 17.5 06/07/24 19.1 20.8 17.8 18.5 19.5 17.8 06/08/24 19.1 20.6 17.9 18.4 19.3 17.8 06/09/24 19.1 20.7 18.1 18.4 19.3 17.8 06/10/24 19.2 21.0 17.8 18.5 19.5 17.8 06/11/24 19.8 21.7 18.4 19.2 20.4 18.4 06/12/24 20.4 22.1 19.1 19.8 20.7 19.1 06/13/24 20.6 22.1 19.5 20.0 20.8 19.4 06/14/24 20.4 21.8 19.3 20.0 20.6 19.4 06/15/24 19.9 21.2 19.0 19.7 20.3 19.2 06/16/24 19.2 20.5 18.0 18.9 19.5 18.4 06/17/24 18.3 19.5 17.5 18.0 18.6 17.6 06/18/24 17.7 19.4 16.4 17.4 17.9 16.8 06/19/24 17.6 19.3 16.3 17.3 17.9 16.7 06/20/24 17.8 19.3 16.5 17.3 17.8 16.8 06/21/24 18.4 20.2 16.9 17.7 18.6 16.9 06/22/24 19.2 21.0 17.7 18.5 19.5 17.8 06/23/24 19.7 21.5 18.2 19.1 19.9 18.4 06/24/24 19.9 21.5 18.3 19.3 19.9 18.6 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-8 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum 06/25/24 19.3 20.3 18.4 19.0 19.6 18.6 06/26/24 19.7 21.1 18.4 18.9 19.5 18.3 06/27/24 19.5 20.9 18.1 19.0 19.7 18.5 06/28/24 19.5 21.2 18.0 19.0 19.8 18.4 06/29/24 19.6 21.3 18.0 18.9 19.7 18.3 06/30/24 20.1 21.9 18.5 19.4 20.0 18.9 07/01/24 20.5 22.3 18.6 19.9 20.5 19.2 07/02/24 20.8 22.3 19.1 20.1 21.3 19.5 07/03/24 20.8 22.5 19.1 20.3 21.0 19.6 07/04/24 21.0 22.6 19.4 20.2 21.2 19.5 07/05/24 21.1 22.5 19.5 20.0 20.5 19.2 07/06/24 21.2 22.7 19.5 20.2 21.6 19.5 07/07/24 21.5 23.0 20.0 20.6 21.2 20.0 07/08/24 22.0 23.8 20.5 21.3 22.1 20.8 07/09/24 22.4 24.0 20.9 21.6 21.9 21.2 07/10/24 22.3 23.8 20.7 21.4 21.9 21.0 07/11/24 22.2 23.6 20.6 21.3 21.8 20.8 07/12/24 22.4 23.9 20.7 21.7 23.0 21.1 07/13/24 22.3 23.3 21.2 21.8 22.4 21.4 07/14/24 22.7 23.9 21.7 21.7 22.1 21.4 07/15/24 22.4 23.7 20.8 21.4 22.0 20.9 07/16/24 22.4 23.7 21.1 21.4 21.9 20.9 07/17/24 21.8 23.2 20.3 21.2 21.7 20.7 07/18/24 21.6 22.8 20.0 20.8 21.2 20.4 07/19/24 21.5 22.7 20.1 20.7 21.5 20.2 07/20/24 21.5 23.0 20.0 20.8 21.5 20.2 07/21/24 22.1 23.7 20.6 21.4 22.0 20.9 07/22/24 22.7 24.2 21.1 21.9 22.9 21.4 07/23/24 23.0 24.5 21.5 22.2 22.9 21.7 07/24/24 23.1 24.1 21.9 22.2 23.1 21.9 07/25/24 22.9 24.0 21.7 22.1 22.8 21.6 07/26/24 22.2 23.5 20.8 21.6 22.4 21.1 07/27/24 21.5 22.5 20.4 21.0 21.7 20.7 07/28/24 21.0 22.1 19.7 20.5 21.0 20.1 07/29/24 20.8 22.1 19.2 20.3 20.8 19.9 07/30/24 20.8 22.2 19.3 20.4 20.9 19.9 07/31/24 20.9 21.9 19.6 20.3 20.8 19.9 08/01/24 21.2 22.6 19.8 20.5 21.3 20.0 08/02/24 20.9 21.9 19.9 20.8 21.1 20.5 08/03/24 21.5 22.5 20.7 21.0 21.3 20.6 08/04/24 21.9 23.3 20.5 21.0 21.7 20.5 08/05/24 21.8 23.3 20.2 21.3 22.0 20.6 08/06/24 22.0 23.4 20.5 21.6 22.1 21.0 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-9 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum 08/07/24 21.7 22.9 20.3 21.4 21.9 21.0 08/08/24 21.7 23.0 20.4 21.2 21.7 20.7 08/09/24 21.6 22.9 20.1 21.2 21.7 20.7 08/10/24 21.7 23.0 20.2 21.1 21.7 20.6 08/11/24 21.5 22.7 20.0 21.0 21.5 20.6 08/12/24 21.3 22.5 19.9 20.7 21.2 20.3 08/13/24 21.0 22.2 19.6 20.7 21.2 20.2 08/14/24 21.0 22.2 19.6 20.5 20.9 19.9 08/15/24 21.0 22.2 19.6 20.4 20.8 20.0 08/16/24 20.9 22.2 19.4 20.4 20.7 19.8 08/17/24 20.8 21.9 19.4 20.3 20.7 20.0 08/18/24 21.0 22.1 19.8 20.4 20.7 20.0 08/19/24 20.5 21.8 19.1 20.2 20.5 19.8 08/20/24 20.4 21.6 19.1 20.1 20.4 19.7 08/21/24 20.5 21.7 19.1 20.1 20.5 19.7 08/22/24 20.2 21.3 18.9 19.9 20.2 19.6 08/23/24 19.5 20.5 18.8 19.5 19.9 19.2 08/24/24 18.8 19.3 18.4 18.6 19.1 18.3 08/25/24 18.5 19.6 17.2 18.1 18.5 17.8 08/26/24 19.0 20.3 17.6 18.6 19.0 18.3 08/27/24 19.7 20.9 18.2 19.2 19.7 18.7 08/28/24 20.0 21.2 18.5 19.5 19.8 19.2 08/29/24 20.1 21.1 18.6 19.5 19.8 19.1 08/30/24 20.0 20.9 18.8 18.8 19.4 18.3 08/31/24 19.4 20.5 17.9 18.9 19.8 18.4 09/01/24 20.1 21.3 18.8 19.4 19.8 19.1 09/02/24 19.8 20.9 18.6 19.2 19.6 18.9 09/03/24 19.3 20.3 17.8 18.8 19.2 18.5 09/04/24 19.3 20.3 17.9 18.6 18.9 18.3 09/05/24 19.5 20.6 18.2 18.7 19.2 18.4 09/06/24 19.8 20.9 18.4 19.1 19.4 18.7 09/07/24 19.9 21.0 18.8 19.2 19.6 18.9 09/08/24 19.7 20.8 18.4 19.1 19.3 18.8 09/09/24 19.5 20.4 18.1 18.9 19.2 18.6 09/10/24 19.5 20.5 18.2 18.8 19.1 18.5 09/11/24 19.2 20.1 18.0 18.8 19.0 18.5 09/12/24 18.9 19.9 17.8 18.4 18.7 18.1 09/13/24 18.6 19.7 17.3 18.3 18.6 17.9 09/14/24 18.7 19.7 17.4 18.2 18.6 18.0 09/15/24 18.6 19.3 17.7 18.3 18.5 18.1 09/16/24 18.1 18.7 17.6 17.9 18.2 17.7 09/17/24 18.2 18.6 17.7 17.5 17.7 17.3 09/18/24 18.2 19.0 17.5 17.1 17.3 16.9 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX C – WATER TEMPERATURE 2024 Poe Water Temperature C-10 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Water Temperature (°C) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum 09/19/24 18.8 19.8 17.7 17.4 17.6 17.2 09/20/24 19.0 20.1 18.0 17.8 18.1 17.5 09/21/24 18.5 19.4 17.2 18.2 18.7 17.7 09/22/24 18.6 19.5 17.3 18.4 18.9 18.0 09/23/24 18.4 19.2 17.3 18.0 18.5 17.7 09/24/24 18.3 19.2 17.1 17.8 18.4 17.5 09/25/24 18.2 19.0 17.1 18.0 18.4 17.5 09/26/24 18.2 19.2 16.9 18.0 18.5 17.5 09/27/24 18.0 18.9 16.7 17.7 18.2 17.3 09/28/24 17.8 18.6 16.8 17.7 18.4 17.0 09/29/24 17.8 18.9 17.1 17.7 18.6 17.3 09/30/24 17.7 18.5 16.8 17.6 18.1 17.3 10/01/24 17.7 18.5 16.7 17.4 17.7 17.1 10/02/24 17.6 18.3 16.5 17.3 17.7 17.1 10/03/24 17.7 18.4 16.7 17.5 17.8 17.3 10/04/24 17.7 18.4 16.8 17.4 17.6 17.1 10/05/24 17.7 18.4 16.7 17.4 17.9 17.1 10/06/24 17.8 18.5 16.8 17.4 17.7 17.2 10/07/24 17.7 18.3 16.8 17.4 17.8 17.1 10/08/24 17.5 18.1 16.5 17.2 17.7 16.8 10/09/24 17.2 17.7 16.3 16.8 17.3 16.5 10/10/24 16.8 17.3 16.0 16.5 16.9 16.2 10/11/24 16.5 17.0 15.6 16.3 16.7 15.9 10/12/24 16.2 16.6 15.4 16.1 16.4 15.5 10/13/24 16.1 16.8 15.6 16.1 16.7 15.7 10/14/24 16.2 17.1 15.4 16.0 16.3 15.8 10/15/24 16.6 17.4 15.8 16.6 17.4 15.8 10/16/24 16.4 16.9 16.1 16.4 16.9 16.1 10/17/24 16.2 16.8 15.5 16.2 16.8 15.5 10/18/24 15.1 15.6 14.7 15.1 15.6 14.7 10/19/24 14.1 14.6 13.7 14.1 14.6 13.7 10/20/24 13.7 14.4 13.1 13.7 14.4 13.1 10/21/24 14.0 14.8 13.5 14.0 14.8 13.5 10/22/24 13.9 14.7 13.4 14.0 14.7 13.4 10/23/24 13.8 14.4 13.3 13.8 14.4 13.3 10/24/24 13.3 13.8 12.8 13.3 13.8 12.8 10/25/24 13.1 13.7 12.8 13.2 13.7 12.8 10/26/24 13.1 13.8 12.6 13.1 13.7 12.6 10/27/24 13.3 13.7 13.0 13.3 13.7 13.0 10/28/24 13.2 13.7 12.8 13.2 13.7 12.8 10/29/24 12.9 13.3 12.6 12.9 13.3 12.5 10/30/24 12.3 12.7 11.9 12.3 12.7 11.9 10/31/24 12.1 12.4 11.8 12.1 12.4 11.9 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX D – HYDROLOGY 2024 Poe Water Temperature March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company APPENDIX D HYDROLOGY Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX D – HYDROLOGY 2024 Poe Water Temperature D-1 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table D-1. Daily average flow from Poe Project stations - 2024 Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 04/01/24 2867 3885 04/02/24 2547 3885 04/03/24 2817 3900 04/04/24 3932 3911 04/05/24 3221 3910 04/06/24 2393 3911 04/07/24 1888 3906 04/08/24 1500 3922 04/09/24 1283 3952 04/10/24 1313 3929 04/11/24 1892 3915 04/12/24 2687 3918 04/13/24 3171 3923 04/14/24 3040 3921 04/15/24 2497 3909 04/16/24 2392 3883 04/17/24 2504 3886 04/18/24 2789 3885 04/19/24 3035 3878 04/20/24 3426 3874 04/21/24 3667 3876 04/22/24 3741 3879 04/23/24 3698 3859 04/24/24 4455 2504 04/25/24 2995 3734 04/26/24 3237 3812 04/27/24 2862 3849 04/28/24 2576 3851 04/29/24 2716 3857 04/30/24 2350 3858 05/01/24 2380 3855 05/02/24 2220 3852 05/03/24 2059 3851 05/04/24 3016 3739 05/05/24 2976 3854 05/06/24 2087 3859 05/07/24 1965 3850 05/08/24 1721 3839 05/09/24 1581 2856 05/10/24 1592 3476 05/11/24 1442 3818 05/12/24 1667 3814 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX D – HYDROLOGY 2024 Poe Water Temperature D-2 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 05/13/24 1715 3779 05/14/24 1934 3693 05/15/24 1950 3706 05/16/24 1965 3689 05/17/24 1940 3593 05/18/24 1897 3430 05/19/24 1842 3321 05/20/24 1804 2998 05/21/24 1781 2637 05/22/24 1597 2773 05/23/24 1582 2943 05/24/24 1493 2759 05/25/24 1302 2899 05/26/24 1282 2840 05/27/24 1263 2793 05/28/24 1267 2697 05/29/24 1255 2690 05/30/24 1173 2438 05/31/24 1166 2709 06/01/24 1174 2791 06/02/24 1175 2615 06/03/24 1173 2475 06/04/24 1187 2379 06/05/24 1194 2197 06/06/24 1077 2271 06/07/24 976 2274 06/08/24 881 2235 06/09/24 805 2287 06/10/24 805 2183 06/11/24 809 1859 06/12/24 807 1835 06/13/24 804 1671 06/14/24 803 1325 06/15/24 789 1226 06/16/24 725 1347 06/17/24 724 1357 06/18/24 672 1311 06/19/24 660 1249 06/20/24 610 1298 06/21/24 612 1341 06/22/24 576 1267 06/23/24 579 1177 06/24/24 542 1255 06/25/24 532 1209 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX D – HYDROLOGY 2024 Poe Water Temperature D-3 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 06/26/24 493 1397 06/27/24 504 1690 06/28/24 569 1354 06/29/24 548 1415 06/30/24 522 1482 07/01/24 522 1466 07/02/24 542 1243 07/03/24 560 864 07/04/24 566 1994 07/05/24 558 1958 07/06/24 560 1777 07/07/24 561 1279 07/08/24 536 1400 07/09/24 467 1344 07/10/24 465 1413 07/11/24 465 1608 07/12/24 467 1354 07/13/24 468 1153 07/14/24 470 1693 07/15/24 469 1585 07/16/24 469 1661 07/17/24 466 1626 07/18/24 466 1510 07/19/24 467 1292 07/20/24 467 1480 07/21/24 465 1639 07/22/24 470 1396 07/23/24 469 1507 07/24/24 467 1373 07/25/24 471 1605 07/26/24 470 1274 07/27/24 468 1455 07/28/24 464 1596 07/29/24 468 1357 07/30/24 464 1404 07/31/24 457 1615 08/01/24 466 1813 08/02/24 461 1575 08/03/24 462 1459 08/04/24 465 1682 08/05/24 463 1511 08/06/24 462 1604 08/07/24 460 1365 08/08/24 463 1668 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX D – HYDROLOGY 2024 Poe Water Temperature D-4 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 08/09/24 461 1535 08/10/24 462 1491 08/11/24 460 1625 08/12/24 461 1736 08/13/24 458 1938 08/14/24 455 1800 08/15/24 456 2040 08/16/24 456 1827 08/17/24 456 1955 08/18/24 456 1939 08/19/24 452 1911 08/20/24 451 2090 08/21/24 453 1730 08/22/24 453 2100 08/23/24 454 1718 08/24/24 454 1885 08/25/24 448 1955 08/26/24 453 2398 08/27/24 458 2237 08/28/24 457 2122 08/29/24 458 1969 08/30/24 459 1867 08/31/24 458 1923 09/01/24 409 1843 09/02/24 401 1987 09/03/24 398 1908 09/04/24 400 1771 09/05/24 402 1857 09/06/24 403 1892 09/07/24 402 1788 09/08/24 402 1909 09/09/24 400 1795 09/10/24 402 1800 09/11/24 413 1784 09/12/24 412 1738 09/13/24 412 1876 09/14/24 398 1988 09/15/24 387 1766 09/16/24 111 2013 09/17/24 90 2091 09/18/24 93 2482 09/19/24 89 2486 09/20/24 188 2301 09/21/24 393 1016 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX D – HYDROLOGY 2024 Poe Water Temperature D-5 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 09/22/24 386 1316 09/23/24 392 1261 09/24/24 390 1863 09/25/24 391 1082 09/26/24 389 1664 09/27/24 389 1637 09/28/24 1205 577 09/29/24 1326 904 09/30/24 423 1339 10/01/24 349 1453 10/02/24 307 1944 10/03/24 306 2010 10/04/24 300 2007 10/05/24 296 1195 10/06/24 296 1204 10/07/24 296 1018 10/08/24 294 779 10/09/24 295 1085 10/10/24 293 1275 10/11/24 292 865 10/12/24 1129 478 10/13/24 1335 407 10/14/24 331 1154 10/15/24 1331 181 10/16/24 1510 111 10/17/24 1505 111 10/18/24 1508 111 10/19/24 1443 111 10/20/24 1395 111 10/21/24 1281 111 10/22/24 1230 111 10/23/24 1268 111 10/24/24 1366 111 10/25/24 1376 111 10/26/24 1376 111 10/27/24 1380 111 10/28/24 1510 111 10/29/24 1585 111 10/30/24 1406 111 10/31/24 1346 111 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company APPENDIX E METEOROLOGY Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-1 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table E-1. Summary of air temperature data from Poe Powerhouse station. Air Temperature (°C) Date Average Maximum Minimum 04/01/24 12.3 23.0 4.5 04/02/24 13.5 21.4 7.1 04/03/24 13.8 20.5 7.9 04/04/24 6.9 11.0 3.8 04/05/24 7.0 11.5 3.9 04/06/24 7.8 12.8 3.8 04/07/24 8.6 17.3 1.6 04/08/24 12.1 21.8 3.4 04/09/24 13.5 22.9 5.5 04/10/24 15.2 24.2 7.4 04/11/24 16.6 26.1 8.9 04/12/24 15.0 21.0 9.7 04/13/24 9.8 13.4 6.7 04/14/24 8.3 11.4 6.3 04/15/24 12.0 18.7 7.5 04/16/24 13.4 20.7 6.7 04/17/24 15.0 23.6 8.2 04/18/24 16.0 24.4 8.5 04/19/24 17.2 25.9 10.2 04/20/24 17.4 27.3 10.5 04/21/24 17.7 28.1 9.7 04/22/24 17.6 27.7 9.5 04/23/24 15.2 19.4 10.8 04/24/24 15.3 19.4 10.5 04/25/24 15.0 18.4 12.8 04/26/24 11.9 15.6 9.3 04/27/24 12.9 20.9 6.0 04/28/24 14.3 23.4 7.5 04/29/24 13.8 22.4 7.3 04/30/24 13.2 23.4 5.4 05/01/24 14.7 24.7 6.0 05/02/24 15.3 24.3 6.8 05/03/24 15.8 24.9 7.9 05/04/24 9.6 16.5 3.2 05/05/24 9.1 14.5 4.4 05/06/24 11.6 18.5 5.4 05/07/24 14.3 22.5 8.6 05/08/24 14.9 24.1 6.9 05/09/24 18.3 28.8 9.1 05/10/24 19.7 31.0 10.1 05/11/24 19.7 31.3 10.5 05/12/24 19.7 30.5 11.3 05/13/24 19.8 30.1 11.7 05/14/24 20.6 31.5 11.8 05/15/24 22.0 33.7 12.6 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-2 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 05/16/24 20.1 28.4 12.1 05/17/24 20.2 28.1 13.7 05/18/24 19.8 27.4 12.7 05/19/24 18.0 24.7 13.5 05/20/24 17.6 26.4 10.2 05/21/24 18.7 28.6 10.4 05/22/24 17.8 27.2 9.6 05/23/24 18.6 28.0 10.6 05/24/24 16.8 24.1 9.1 05/25/24 15.1 20.8 10.2 05/26/24 17.3 26.5 9.8 05/27/24 19.1 28.6 11.5 05/28/24 19.9 28.1 12.3 05/29/24 20.6 29.9 13.3 05/30/24 21.8 32.8 12.9 05/31/24 21.6 31.7 12.5 06/01/24 21.5 30.4 13.6 06/02/24 21.0 27.9 14.6 06/03/24 20.8 26.1 16.4 06/04/24 24.1 35.8 14.4 06/05/24 24.7 35.8 15.5 06/06/24 25.6 36.6 16.7 06/07/24 25.1 34.8 16.7 06/08/24 23.3 30.5 16.9 06/09/24 22.9 30.2 17.2 06/10/24 23.8 34.1 15.3 06/11/24 25.2 35.9 16.6 06/12/24 25.7 35.8 17.1 06/13/24 23.7 31.1 17.3 06/14/24 22.2 29.9 15.8 06/15/24 20.5 30.0 13.3 06/16/24 19.7 29.4 10.5 06/17/24 19.0 27.4 11.4 06/18/24 19.6 29.1 10.8 06/19/24 19.6 29.7 10.2 06/20/24 20.2 29.7 11.7 06/21/24 22.8 33.1 13.8 06/22/24 24.8 36.1 15.4 06/23/24 24.9 36.2 15.3 06/24/24 24.1 35.3 14.0 06/25/24 22.1 31.1 14.9 06/26/24 23.9 32.8 16.4 06/27/24 21.5 30.4 13.2 06/28/24 22.5 33.1 13.2 06/29/24 23.4 33.5 14.0 06/30/24 24.7 34.3 16.2 07/01/24 25.6 37.3 15.1 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-3 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 07/02/24 28.3 39.9 18.6 07/03/24 28.6 40.3 18.5 07/04/24 27.1 39.8 16.7 07/05/24 28.0 42.1 17.1 07/06/24 28.9 42.7 17.1 07/07/24 29.1 41.1 18.8 07/08/24 28.5 39.2 19.2 07/09/24 27.2 38.2 18.2 07/10/24 27.6 39.8 18.0 07/11/24 28.1 41.0 17.8 07/12/24 29.0 41.9 18.6 07/13/24 27.8 38.4 19.9 07/14/24 28.1 36.2 22.9 07/15/24 26.2 35.0 18.1 07/16/24 25.9 33.1 19.2 07/17/24 23.7 33.6 15.3 07/18/24 25.2 36.8 14.9 07/19/24 27.2 38.9 17.4 07/20/24 27.2 38.4 17.6 07/21/24 27.4 36.9 19.5 07/22/24 28.2 39.4 19.0 07/23/24 29.4 40.0 20.4 07/24/24 29.6 38.7 21.4 07/25/24 27.8 37.1 19.5 07/26/24 26.3 37.0 16.0 07/27/24 21.5 27.3 16.3 07/28/24 21.7 30.7 13.4 07/29/24 22.7 32.0 14.4 07/30/24 23.6 33.3 15.0 07/31/24 24.0 33.0 16.3 08/01/24 25.8 36.0 17.3 08/02/24 24.3 33.3 16.8 08/03/24 26.5 35.1 19.4 08/04/24 27.4 37.1 19.3 08/05/24 26.3 36.2 17.5 08/06/24 26.2 37.9 16.8 08/07/24 26.4 38.8 16.3 08/08/24 26.5 36.9 18.7 08/09/24 26.1 37.5 16.6 08/10/24 25.5 36.0 16.5 08/11/24 24.8 34.3 16.4 08/12/24 23.1 31.9 15.1 08/13/24 22.7 31.3 14.6 08/14/24 23.3 32.6 15.2 08/15/24 23.2 32.0 15.5 08/16/24 23.1 33.2 15.0 08/17/24 22.1 28.2 15.2 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-4 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 08/18/24 21.8 28.9 16.2 08/19/24 21.3 30.5 13.5 08/20/24 22.2 32.4 14.0 08/21/24 22.3 30.9 14.7 08/22/24 20.8 27.5 13.2 08/23/24 18.8 21.0 15.6 08/24/24 16.7 22.3 13.8 08/25/24 19.1 29.7 10.8 08/26/24 21.1 32.3 12.5 08/27/24 22.8 34.6 14.3 08/28/24 23.5 35.5 14.5 08/29/24 23.6 34.8 14.7 08/30/24 24.1 35.0 15.6 08/31/24 24.1 35.5 15.3 09/01/24 23.8 34.0 15.3 09/02/24 21.6 31.3 14.1 09/03/24 22.7 36.1 12.2 09/04/24 26.0 37.8 16.7 09/05/24 25.8 38.2 16.7 09/06/24 25.9 38.2 16.8 09/07/24 25.0 35.3 17.3 09/08/24 23.1 33.8 14.9 09/09/24 24.5 36.3 15.7 09/10/24 23.2 33.2 15.9 09/11/24 19.7 26.9 13.3 09/12/24 20.5 30.1 12.9 09/13/24 20.4 31.0 12.4 09/14/24 21.3 31.8 12.9 09/15/24 18.8 23.7 13.8 09/16/24 17.1 20.8 13.1 09/17/24 18.6 23.6 16.5 09/18/24 17.8 24.5 13.1 09/19/24 20.4 29.7 13.1 09/20/24 21.5 33.3 13.4 09/21/24 20.5 30.7 12.8 09/22/24 21.2 33.0 12.4 09/23/24 23.2 36.8 13.1 09/24/24 23.1 36.0 14.2 09/25/24 21.9 32.4 14.5 09/26/24 20.3 31.5 12.5 09/27/24 20.9 33.6 12.2 09/28/24 21.5 35.2 12.6 09/29/24 20.9 31.7 13.3 09/30/24 22.7 34.5 14.1 10/01/24 24.2 38.6 16.5 10/02/24 23.5 37.3 15.7 10/03/24 22.5 36.0 14.2 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-5 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 10/04/24 21.6 34.2 13.1 10/05/24 22.6 35.8 14.4 10/06/24 24.0 37.2 16.2 10/07/24 23.5 36.8 15.8 10/08/24 23.1 36.4 15.6 10/09/24 20.5 30.2 13.7 10/10/24 19.4 29.5 11.7 10/11/24 18.6 28.7 11.3 10/12/24 16.2 20.5 10.7 10/13/24 19.0 26.9 13.1 10/14/24 18.2 27.9 11.8 10/15/24 18.3 27.8 11.7 10/16/24 16.4 21.7 14.0 10/17/24 16.2 22.4 10.2 10/18/24 13.3 23.8 5.8 10/19/24 16.8 29.8 9.4 10/20/24 15.5 25.6 8.4 10/21/24 14.5 24.9 7.8 10/22/24 14.1 24.9 7.2 10/23/24 14.7 26.0 7.9 10/24/24 16.8 24.6 10.4 10/25/24 14.4 25.0 8.3 10/26/24 14.7 26.6 7.4 10/27/24 16.6 21.7 11.8 10/28/24 12.4 18.5 7.0 10/29/24 9.9 19.5 3.9 10/30/24 10.9 17.6 4.3 10/31/24 11.2 15.4 8.2 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-6 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Table E-2. Summary of meteorological data from Poe Powerhouse station. Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 04/01/24 64.1 1.3 186.8 error 04/02/24 73.4 1.1 176.8 error 04/03/24 74.0 1.1 179.4 error 04/04/24 77.0 1.5 173.2 error 04/05/24 78.6 1.0 174.9 error 04/06/24 75.6 0.9 175.3 error 04/07/24 70.0 1.0 163.9 error 04/08/24 58.4 1.6 204.7 error 04/09/24 65.5 1.1 169.7 error 04/10/24 73.1 0.8 165.5 error 04/11/24 69.4 0.7 167.3 error 04/12/24 68.5 0.9 203.3 error 04/13/24 80.1 1.1 184.1 error 04/14/24 87.4 0.9 155.8 error 04/15/24 81.7 1.0 159.8 error 04/16/24 81.6 0.9 163.9 error 04/17/24 74.6 0.7 192.8 error 04/18/24 69.9 0.8 184.0 error 04/19/24 70.0 0.6 174.6 error 04/20/24 71.1 0.6 176.7 error 04/21/24 69.2 0.6 182.4 error 04/22/24 68.9 0.6 173.3 error 04/23/24 74.5 1.0 164.5 error 04/24/24 72.5 1.1 164.4 error 04/25/24 74.9 0.9 161.1 error 04/26/24 88.0 0.9 178.9 error 04/27/24 76.9 0.9 167.4 error 04/28/24 69.8 0.7 175.9 error 04/29/24 66.0 0.8 174.9 error 04/30/24 60.9 0.7 158.3 error 05/01/24 48.7 1.4 193.0 error 05/02/24 61.6 0.9 187.2 error 05/03/24 64.0 0.9 169.3 error 05/04/24 83.4 1.6 176.7 error 05/05/24 75.6 0.9 160.0 error 05/06/24 70.8 0.9 165.9 error 05/07/24 66.6 1.0 173.1 error 05/08/24 51.3 1.3 208.8 error 05/09/24 47.3 0.9 190.3 error 05/10/24 54.7 0.9 196.2 error 05/11/24 58.0 0.8 201.0 error 05/12/24 66.2 0.6 181.1 error 05/13/24 66.7 0.8 158.9 error Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-7 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 05/14/24 67.3 0.7 161.7 error 05/15/24 62.0 0.8 195.8 error 05/16/24 70.4 0.9 166.9 error 05/17/24 72.8 0.9 174.2 error 05/18/24 73.9 0.8 171.2 error 05/19/24 72.4 0.9 177.0 error 05/20/24 54.0 1.1 192.2 error 05/21/24 46.3 1.0 165.2 error 05/22/24 58.5 0.9 167.3 error 05/23/24 47.6 1.3 186.2 error 05/24/24 60.9 1.1 158.8 error 05/25/24 73.4 1.1 167.0 error 05/26/24 70.4 0.9 166.8 error 05/27/24 68.2 0.7 170.2 error 05/28/24 66.2 0.8 170.0 error 05/29/24 60.4 0.9 184.2 error 05/30/24 47.6 1.3 200.3 error 05/31/24 59.1 0.7 165.7 error 06/01/24 62.8 0.8 165.8 error 06/02/24 66.0 0.9 159.0 error 06/03/24 71.5 0.8 177.1 error 06/04/24 61.8 0.9 193.1 error 06/05/24 63.4 0.6 164.7 error 06/06/24 63.3 0.6 179.1 error 06/07/24 62.7 0.8 156.6 error 06/08/24 67.1 0.9 161.3 error 06/09/24 65.7 0.9 165.7 error 06/10/24 66.3 0.8 172.4 error 06/11/24 64.8 0.8 170.3 error 06/12/24 62.4 0.7 159.9 error 06/13/24 64.6 0.9 154.2 error 06/14/24 64.5 1.0 161.1 error 06/15/24 54.6 0.8 185.4 error 06/16/24 47.7 0.9 164.4 error 06/17/24 47.3 1.2 213.5 error 06/18/24 44.0 1.1 183.2 error 06/19/24 47.4 0.9 165.0 error 06/20/24 57.8 0.9 164.8 error 06/21/24 63.3 0.9 156.8 error 06/22/24 61.0 0.6 160.8 error 06/23/24 52.3 0.7 166.0 error 06/24/24 49.3 0.7 164.8 error 06/25/24 62.8 0.5 166.1 error 06/26/24 50.9 1.0 165.6 423.1 06/27/24 52.6 0.8 169.9 308.9 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-8 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 06/28/24 53.6 0.8 158.6 337.6 06/29/24 52.8 0.8 164.2 332.1 06/30/24 54.9 0.9 163.8 329.7 07/01/24 49.3 0.9 185.2 336.6 07/02/24 38.3 1.4 196.6 341.7 07/03/24 37.7 1.4 191.2 343.6 07/04/24 46.5 0.6 163.0 342.9 07/05/24 48.4 0.9 165.8 336.5 07/06/24 48.4 0.7 165.4 338.2 07/07/24 50.7 0.7 163.4 329.2 07/08/24 53.2 0.8 157.2 333.0 07/09/24 55.2 0.8 171.3 331.5 07/10/24 51.3 0.7 158.4 326.5 07/11/24 47.1 0.6 170.3 332.5 07/12/24 45.4 0.7 172.4 323.1 07/13/24 52.4 0.6 171.4 218.1 07/14/24 52.9 1.0 155.8 276.2 07/15/24 54.5 0.9 156.9 317.9 07/16/24 52.7 1.0 165.0 321.1 07/17/24 49.6 0.9 172.2 330.4 07/18/24 45.7 1.0 173.1 327.4 07/19/24 45.4 1.1 167.6 307.6 07/20/24 46.8 0.8 170.7 302.5 07/21/24 53.2 0.9 165.9 314.5 07/22/24 52.2 0.8 171.6 313.7 07/23/24 49.3 0.7 168.5 307.8 07/24/24 49.0 0.9 162.9 278.8 07/25/24 44.3 1.0 172.6 326.1 07/26/24 40.7 0.9 172.7 326.6 07/27/24 53.1 1.0 170.8 257.9 07/28/24 55.1 1.0 170.3 311.4 07/29/24 52.4 0.9 165.5 310.2 07/30/24 49.6 0.8 165.8 309.4 07/31/24 53.8 0.8 170.1 261.6 08/01/24 53.8 0.7 172.2 294.6 08/02/24 58.6 0.5 165.3 133.5 08/03/24 59.2 0.9 186.4 199.9 08/04/24 55.1 0.8 166.1 301.1 08/05/24 51.3 0.9 158.6 306.1 08/06/24 44.3 0.7 178.0 310.4 08/07/24 36.8 0.7 178.5 291.1 08/08/24 37.5 0.7 172.5 300.9 08/09/24 41.1 0.7 178.1 298.9 08/10/24 45.1 0.6 165.3 305.2 08/11/24 46.5 0.9 168.2 294.0 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-9 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 08/12/24 50.9 1.1 181.4 296.3 08/13/24 48.9 0.9 173.8 295.0 08/14/24 50.2 0.9 184.1 292.1 08/15/24 50.2 0.7 184.5 290.1 08/16/24 51.0 0.8 167.6 288.9 08/17/24 56.6 1.4 177.5 275.3 08/18/24 59.3 1.0 164.7 287.8 08/19/24 51.7 0.9 180.3 284.4 08/20/24 48.7 0.7 177.7 279.5 08/21/24 48.8 0.9 165.8 282.3 08/22/24 52.6 1.4 178.4 281.4 08/23/24 52.0 1.9 187.2 161.9 08/24/24 75.2 1.0 209.2 144.8 08/25/24 62.7 1.2 199.1 273.2 08/26/24 61.4 0.8 176.3 272.5 08/27/24 58.0 0.6 182.1 277.1 08/28/24 51.5 0.7 181.4 273.0 08/29/24 52.1 0.8 165.4 267.2 08/30/24 52.2 0.8 169.2 263.9 08/31/24 52.0 0.7 176.1 262.6 09/01/24 52.3 0.9 176.2 262.8 09/02/24 51.4 0.9 185.6 270.3 09/03/24 44.1 0.7 182.5 268.1 09/04/24 39.0 1.2 192.4 253.5 09/05/24 44.4 0.7 176.8 253.7 09/06/24 44.3 0.6 179.8 252.4 09/07/24 45.7 0.9 172.9 236.0 09/08/24 46.7 0.9 168.1 253.7 09/09/24 43.2 0.8 171.9 239.1 09/10/24 48.7 0.8 172.8 244.8 09/11/24 57.9 1.0 171.0 239.7 09/12/24 53.0 1.0 201.5 239.7 09/13/24 50.6 0.6 190.6 238.0 09/14/24 51.3 0.7 173.1 234.9 09/15/24 57.5 1.1 181.6 185.7 09/16/24 62.5 0.9 171.8 112.5 09/17/24 60.8 0.7 177.6 102.6 09/18/24 69.9 0.9 164.5 191.3 09/19/24 64.2 0.9 172.2 222.5 09/20/24 55.9 0.9 183.3 219.5 09/21/24 57.8 0.9 179.8 220.0 09/22/24 55.3 0.8 179.3 220.4 09/23/24 44.7 1.1 209.9 220.3 09/24/24 44.4 0.6 185.5 217.3 09/25/24 47.0 0.8 168.8 213.5 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 APPENDIX E – METEOROLOGY 2024 Poe Water Temperature E-10 March 2025 Poe Project, FERC No. 2107 © 2025, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 09/26/24 50.8 0.8 181.1 218.3 09/27/24 49.6 0.7 173.6 213.3 09/28/24 46.6 0.6 184.9 217.2 09/29/24 47.1 0.9 180.0 210.9 09/30/24 42.9 1.4 202.8 207.7 10/01/24 34.6 1.1 188.1 205.2 10/02/24 36.4 0.9 181.9 206.1 10/03/24 40.8 0.7 176.1 204.7 10/04/24 42.1 0.6 181.2 189.2 10/05/24 43.4 0.7 184.4 190.3 10/06/24 39.5 1.2 190.3 185.8 10/07/24 39.3 1.1 189.6 169.0 10/08/24 38.7 1.0 180.0 188.6 10/09/24 46.0 0.8 183.4 162.3 10/10/24 50.7 0.7 187.9 162.1 10/11/24 51.5 0.8 185.9 176.4 10/12/24 64.1 0.7 206.5 68.8 10/13/24 69.0 0.7 172.0 170.7 10/14/24 69.1 0.7 184.8 168.2 10/15/24 69.0 0.6 167.8 165.0 10/16/24 82.3 0.6 180.9 104.6 10/17/24 64.1 1.4 188.5 160.6 10/18/24 45.8 2.1 216.6 168.7 10/19/24 39.6 1.9 188.2 163.9 10/20/24 52.2 0.7 175.6 157.8 10/21/24 51.6 0.7 173.6 151.1 10/22/24 55.9 0.7 190.6 145.5 10/23/24 57.4 0.6 174.2 145.3 10/24/24 38.5 1.9 237.7 154.3 10/25/24 56.8 0.9 175.9 126.7 10/26/24 56.4 0.7 193.7 151.9 10/27/24 59.2 1.3 156.4 83.4 10/28/24 62.7 0.8 180.4 111.7 10/29/24 62.3 0.9 188.5 144.4 10/30/24 56.0 1.1 167.8 105.5 10/31/24 83.5 0.8 153.5 102.7 Document Accession #: 20250630-5257 Filed Date: 06/30/2025 ENCLOSURE  Document Accession #: 20250630-5257 Filed Date: 06/30/2025 From:Salve, Rohit To:Urias, Anna; Maher, Michael@Wildlife Cc:Larson, Anika; Fisch, Nathan@Waterboards; Dyke, Jessica@Waterboards; Sable, Kurt A -FS; Alvarez, Dawn - FS, CA; Everest, Loren - FS, CA; Planning Director)"; Brenzovich, Erika - FS, CA; "Aondrea_Bartoo@fws.gov"; Lawson, Beth@Wildlife; Loeser, Kamie Subject:RE: FERC 2107: Poe 2024 Draft Water Temperature Monitoring Data Report Date:Monday, June 30, 2025 12:17:55 PM Attachments:Poe Project Daily Average Water Temperature 2024.xlsx Classification: Public Michael, Attached is the data for 2024. Rohit From: Urias, Anna <AXUS@pge.com> Sent: Monday, June 30, 2025 11:00 AM To: Salve, Rohit <ROSK@pge.com>; Maher, Michael@Wildlife <michael.maher@wildlife.ca.gov> Cc: Larson, Anika <A9L6@pge.com>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; Dyke, Jessica@Waterboards <Jessica.Dyke@Waterboards.ca.gov>; Sable, Kurt A -FS <kurt.sable@usda.gov>; Alvarez, Dawn - FS, CA <dawn.alvarez@usda.gov>; Everest, Loren - FS, CA <loren.everest@usda.gov>; Planning Director)' <traceyferguson@countyofplumas.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; 'Aondrea_Bartoo@fws.gov' <aondrea_bartoo@fws.gov>; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; Loeser, Kamie <kloeser@buttecounty.net> Subject: RE: FERC 2107: Poe 2024 Draft Water Temperature Monitoring Data Report Classification: Public Hi Rohit, Are we able to provide Micheal’s data format request below? Thanks, A N N A U R I A S H Y D R O L I C E N S E C O O R D I N A T O R I P O W E R G E N E R A T I O N P A C I F I C G A S & E L E C T R I C C O M P A N Y ( 5 3 0 ) 2 0 1 - 1 9 6 1 I A X U S @ P G E . C O M From: Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov> Sent: Wednesday, June 25, 2025 3:40 PM To: Urias, Anna <AXUS@pge.com>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; Dyke, Jessica@Waterboards <Jessica.Dyke@Waterboards.ca.gov>; Sable, Kurt A -FS <kurt.sable@usda.gov>; Alvarez, Dawn - FS, CA <dawn.alvarez@usda.gov>; Everest, Loren - FS, CA <loren.everest@usda.gov>; Planning Director)' Document Accession #: 20250630-5257 Filed Date: 06/30/2025 <traceyferguson@countyofplumas.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; 'Aondrea_Bartoo@fws.gov' <aondrea_bartoo@fws.gov>; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; Loeser, Kamie <kloeser@buttecounty.net> Cc: Larson, Anika <A9L6@pge.com>; Salve, Rohit <ROSK@pge.com> Subject: RE: FERC 2107: Poe 2024 Draft Water Temperature Monitoring Data Report Classification: Public CAUTION: EXTERNAL SENDER! This email was sent from an EXTERNAL source. Do you know this person? Are you expecting this email? Are you expecting any links or attachments? If suspicious, do not click links, open attachments, or provide credentials. Don't delete it. Report it by using the "Report Phish" button. Hello Anna, Department staff would like to be able to track temperature data over time, changing operations, and implementation of various license conditions. To better aid in that process, please provide all data collected during 2024 in one of the following formats: .csv, .xlsx/.xls, or .dss. We would prefer long- term data sets be provided, but at a minimum just the 2024 data will be sufficient. Thank you, 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: Urias, Anna <AXUS@pge.com> Sent: Tuesday, June 3, 2025 3:19 PM To: Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; Dyke, Jessica@Waterboards <Jessica.Dyke@Waterboards.ca.gov>; Sable, Kurt A -FS <kurt.sable@usda.gov>; Alvarez, Dawn - FS, CA <dawn.alvarez@usda.gov>; Everest, Loren - FS, CA <loren.everest@usda.gov>; Planning Director)' <traceyferguson@countyofplumas.com>; Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov>; 'Aondrea_Bartoo@fws.gov' <aondrea_bartoo@fws.gov>; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov>; Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov>; Loeser, Kamie <kloeser@buttecounty.net> Cc: Larson, Anika <A9L6@pge.com>; Salve, Rohit <ROSK@pge.com> Subject: FERC 2107: Poe 2024 Draft Water Temperature Monitoring Data Report WARNING: This message is from an external source. Verify the sender and exercise caution when clicking links or opening attachments. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Classification: Public Hi folks, Please see the attached 2024 Draft Water Temperature Monitoring Data Report for Pacific Gas and Electric Company’s (PG&E) Poe Hydroelectric Project, Federal Energy Regulatory Commission No. 2107. This report is a requirement of the Poe Water Temperature Monitoring Plan (Plan), approved by FERC December 10, 2019. If you have any comments, please provide them to PG&E by June 30, 2025. Pursuant to the Plan, PG&E will include comments into the final report, which will be filed with FERC by June 30, 2025. Regards, A N N A U R I A S H Y D R O L I C E N S E C O O R D I N A T O R I P O W E R G E N E R A T I O N P A C I F I C G A S & E L E C T R I C C O M P A N Y ( 5 3 0 ) 2 0 1 - 1 9 6 1 I A X U S @ P G E . C O M You can read about PG&E’s data privacy practices at PGE.com/privacy. Document Accession #: 20250630-5257 Filed Date: 06/30/2025 Document Content(s) PGE20250630_2107_2024_WaterTempMonitoring_Ltr.pdf.........................1 PGE20250630_2107_2024_WaterTempMonitoring_Enc-1.pdf ......................3 PGE20250630_2107_2024_WaterTempMonitoring_Enc-2.pdf .....................80 Document Accession #: 20250630-5257 Filed Date: 06/30/2025