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HomeMy WebLinkAbout06.26.26 Board Correspondence - FW_ Annual Water Quality_Minimum Flow submitted in FERC P-2107-000 by Pacific Gas and Electric CompanyFrom: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:Cannon, Jamie; Loeser, Kamie Subject:Board Correspondence - FW: Annual Water Quality/Minimum Flow submitted in FERC P-2107-000 by Pacific Gas and Electric Company Date:Friday, June 26, 2026 4:27:25 PM Please see Board Correspondence - Lewis Lee Administrative Technician - Confidential Butte County Administration 25 County Center Drive, Suite 200 • Oroville, CA 95965 T: 530.552.3326 www.buttecounty.ca.gov | lelee@buttecounty.ca.gov -----Original Message----- From: 'FERC eSubscription' <eSubscription@ferc.gov> Sent: Friday, June 26, 2026 12:36 PM Subject: Annual Water Quality/Minimum Flow submitted in FERC P-2107-000 by Pacific Gas and Electric Company .ATTENTION: This message originated from outside Butte County. Please exercise judgment before opening attachments, clicking on links, or replying.. On 6/26/2026, the following Filing was submitted to the Federal Energy Regulatory Commission (FERC), Washington D.C.: Filer: Pacific Gas and Electric Company Docket(s): P-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 2025 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=20260626- 5136__;!!KNMwiTCp4spf!FCdcjV_ThFBCAZskK_Tk5VRglXpAbGJE2GtqL_Y3S8UtKImswc0lUjVa9ZWPvNTI4imQFW7zraXXg5lzbTiTctQH5tj0bZMtGI84$ To modify your subscriptions, click here: MDZ$ ------------------------------------------------------------------------ Please do not respond to this email. Online help is available here: https://urldefense.com/v3/__http://www.ferc.gov/efiling- help.asp__;!!KNMwiTCp4spf!FCdcjV_ThFBCAZskK_Tk5VRglXpAbGJE2GtqL_Y3S8UtKImswc0lUjVa9ZWPvNTI4imQFW7zraXXg5lzbTiTctQH5tj0bXVK4wW0$ 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 26, 2026 Via Electronic Submittal (E-File) Debbie-Anne Reese, Secretary Federal Energy Regulatory Commission Division of Hydropower Administration and Compliance 888 First Street, NE Washington, D.C. 20426 RE: Poe Hydroelectric Project, FERC No. 2107-CA Water Temperature Monitoring 2025 Annual Data Report Dear Secretary Reese: This letter presents the Water Temperature Monitoring 2025 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 in an order issued December 10, 2019, PG&E developed a draft Water Temperature Monitoring 2025 Annual Data Report and submitted it to the U.S. Department of Agriculture, Forest Service (Forest Service), State Water Resources Control Board (SWRCB), California Department of Fish and Wildlife (CDFW), U.S. Fish and Wildlife Service (USFWS), Butte County, and Plumas County (collectively, resource agencies) for comment on February 25, 2026. No comments were received from the resource agencies. The Water Temperature Monitoring 2025 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, Jimmy Galloway Senior Hydro License Coordinator Enclosures: 1. Water Temperature Monitoring 2025 Annual Data Report, prepared by PG&E, Sagraves Environmental Services, and Spring River Ecological Sciences LLC and dated March 2026 2. Agency Consultation Record via Email cc: See Attached List Document Accession #: 20260626-5136 Filed Date: 06/26/2026 Debbie-Anne Reese, Secretary June 26, 2026 Page 2 cc: via email (w/ enclosures) 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 Loeser, 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 #: 20260626-5136 Filed Date: 06/26/2026 ENCLOSURE 1 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 WATER TEMPERATURE MONITORING 2025 Annual Data Report Poe Hydroelectric Project FERC Project No. 2107 March 2026 © 2026, Pacific Gas and Electric Company Document Accession #: 20260626-5136 Filed Date: 06/26/2026 PACIFIC GAS AND ELECTRIC COMPANY Poe Hydroelectric Project FERC Project No. 2107 WATER TEMPERATURE MONITORING 2025 Annual Data Report March 2026 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 © 2026, Pacific Gas and Electric Company Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature i March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company TABLE OF CONTENTS Page 1.0 Introduction ........................................................................................................................1 1.1 Project Setting ..........................................................................................................1 1.2 Goal and Objectives .................................................................................................3 1.3 Scope of Report........................................................................................................4 1.4 Consultation .............................................................................................................4 2.0 Methods Summary .............................................................................................................5 2.1 Water Temperature Monitoring ...............................................................................5 2.1.1 Sampling Locations .....................................................................................5 2.1.2 Water Temperature Measurement................................................................5 2.2 Quality Assurance and Control Procedures .............................................................5 2.3 Poe Reach Stream Flow ...........................................................................................8 2.4 Poe Project Meteorology..........................................................................................8 3.0 Results .................................................................................................................................9 3.1 Monitoring Issues.....................................................................................................9 3.2 2025 Water Year Type .............................................................................................9 3.3 Water Temperature Monitoring ...............................................................................9 3.3.1 Station WT-3 ..............................................................................................11 3.3.2 Station WT-4 ..............................................................................................12 3.3.3 Station WT-5 ..............................................................................................13 3.3.4 Station WT-6 ..............................................................................................14 3.4 Comparison of Water Temperatures in Poe Project ..............................................15 3.5 Maximum Weekly Average Temperature (MWAT) .............................................17 3.6 2025 Stream Flow ..................................................................................................20 3.6.1 Poe Reach...................................................................................................20 3.6.2 Poe Powerhouse .........................................................................................20 3.7 2025 Meteorology ..................................................................................................20 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature ii March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 4.0 References .........................................................................................................................23 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature iii March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company LIST OF FIGURES Page Figure 1. Location of the Poe Hydroelectric Project in northeastern California. ........................2 Figure 2. Water temperature monitoring stations. .......................................................................7 Figure 3. Daily maximum, minimum, and average water temperatures NFFR at Pulga Bridge (Station WT-3) – 2025. ...................................................................................11 Figure 4. Daily maximum, minimum, and average water temperatures NFFR at Bardees Bar (Station WT-4) – 2025. ..........................................................................12 Figure 5. Daily maximum, minimum, and average water temperatures NFFR above Poe Powerhouse (Station WT-5) – 2025. ...................................................................13 Figure 6. Daily maximum, minimum, and average water temperatures NFFR below Poe Powerhouse (Station WT-6) – 2025. ...................................................................14 Figure 7. Comparison of daily average water temperature from the Poe Project of the NFFR with mean daily air temperatures from Poe Powerhouse - 2025. ....................16 Figure 8. Weekly (7-Day) running average water temperature at each station monitored in 2025. .......................................................................................................................19 Figure 9. Daily average stream flow in the Poe Project area - 2025. .........................................22 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature iv March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company LIST OF TABLES Page Table 1. Water Temperature Monitoring Locations and Description .........................................6 Table 2. Summary of 2025 continuous water temperature monitoring in the Poe Project. ........................................................................................................................10 Table 3. Summary of maximum weekly average water temperature (by month) and the absolute maximum weekly average temperature (MWAT) for each station monitored in 2025. ......................................................................................................18 Table 4. Summary of Poe Project flow during the 2025 monitoring period. ...........................21 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 1 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 1.0 INTRODUCTION This annual report presents water temperature data collected during the 2025 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, 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. The monitoring presented in this annual report was conducted in accordance with the Water Temperature Monitoring Plan (PG&E 2019a) that was approved by FERC order on December 10, 2019 (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). Waters entering the Poe Project are derived from a series of major hydroelectric facilities that utilize the water resources of the NFFR and its tributaries for hydroelectric power generation . 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 2 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Figure 1. Location of the Poe Hydroelectric Project in northeastern California. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 3 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Water in the NFFR is diverted to Poe Powerhouse from the Poe Diversion Dam. This diversion creates an 8.0-mile-long bypass reach (Poe Reach). Water temperature monitoring in the Poe Reach was conducted during the relicensing effort for 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 has been 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, which were not included in the annual reports associated with RCC Project, were summarized in the 2020 annual report (PG&E 2021), which was the first annual report submitted under the Poe Project Water Temperature Monitoring Plan (PG&E 2019a). The results of the 2020, 2021, 2022, 2023, and 2024 water temperature monitoring efforts were presented as annual reports (PG&E 2021, 2022, 2023, 2024 and 2025, 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 4 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 1.3 SCOPE OF REPORT The 2025 water temperature monitoring report follows the requisites outlined in the Water Temperature Monitoring Plan (PG&E 2019a) 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 ???, 2026. Results of any consultation will be included in Appendix F. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 5 March 2026 Poe Project, FERC No. 2107 © 2026, 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. Details about each station in the Poe Reach are included in Table 1. Figure 2 shows the location of all monitoring stations within the Poe Reach. 2.1.2 Water Temperature Measurement Water temperature was continuously monitored from April through October 2025. All thermographs/data-loggers were set to record/store instantaneous water temperature at 15-minute intervals. Stored data were downloaded during routine 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 2025 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 based on manufacturers’ recommendation of a two-year interval. Pre-deployment calibration was conducted in 2025; post calibration will occur following the 2026 deployment. All instruments are calibration adjusted to achieve a maximum instrument error of approximately 0.1C. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 6 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table 1. Water Temperature Monitoring Locations and Description Site ID Site Description Monitoring Status Near Historic Monitoring Points Approximate Location (UTM NAD 83) Latitude Longitude WT 1 Downstream of Poe Dam Discontinued in 2025 Near Relic Site Poe 5; NF 17 39°48'31.5"N 121°26'5.8"W WT 2 Upstream of Mill Creek Discontinued in 2025 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 7 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Figure 2. Water temperature monitoring stations. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 8 March 2026 Poe Project, FERC No. 2107 © 2026, 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 2025 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 Water Temperature Monitoring Study Plan (PG&E 2019a), a meteorological monitoring station was installed at Poe Powerhouse in 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 9 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 3.0 RESULTS 3.1 MONITORING ISSUES There were no issues with instrument operation or vandalism in 2025. The data logger at Station WT-3 was left stranded as stream flows receded on two occasions (name period), the data logger was placed back in the flow by personnel visiting the site after flows dropped. Instrument installation at WT 4 was delayed due to the access road being washed out during winter storms. High flows would have prevented safe access regardless of road access prior to the June 3, 2025, installation date. Instrument installation at WT-6 was delayed until June 4, to coincide with the redeployment of the exclusion buoy which had been removed during the high runoff period. 3.2 2025 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 2025 reflected this dichotomy. The Department of Water Resource (DWR) classified 2025 as an “Above Normal” year with regard to the greater Sacramento River Basin (CDEC 2025). In accordance with Condition No. 5B (Water Year Type) of the RCC Project license (FERC 2001), however, the 2025 water year was classified as “Wet” based on the May 1 estimated inflow to Lake Oroville (DWR Bulletin 120 May 2025). 3.3 WATER TEMPERATURE MONITORING In 2025 water temperatures were continuously monitored at four locations. Stations WT-3 and WT-5 were monitored from April 1 through October 31, 2025. Stations WT-4 was installed on June 4 following road repairs and the end of the high flow period. Station WT-6 was installed on June 6 and removed on September 30, 2025. Both of these dates coincide with the installation and removal of the exclusion buoy which deployment at this station is dependent on being in place. The installation of WT-1 and WT-2 were not required following discussions with the regulatory agencies, which agreed to discontinue monitoring at these locations. Monthly statistics for each station are included in Table 2. Additional details can be found in Appendix C1. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 10 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table 2. Summary of 2025 continuous water temperature monitoring in the Poe Project. Water Temperature (°C) Daily Statistic1 Data Station Month Maximum Minimum Mean Range2 Days WT-3 April 12.0 6.3 10.2 0.8 30 May 16.7 12.3 14.2 1.4 21 June 19.3 16.1 17.3 1.5 30 July 20.3 18.4 19.4 2.0 22 August 21.3 19.7 20.4 2.5 31 September 20.9 17.9 19.5 1.9 30 October 17.7 12.5 14.6 1.1 31 Period Statistics 21.3 6.3 16.5 1.6 WT-4 April -- -- -- -- 0 May -- -- -- -- 0 June 19.7 16.5 17.8 2.2 27 July 21.3 18.8 20.0 2.8 31 August 21.8 20.0 20.8 3.0 31 September 21.3 18.1 19.7 2.1 30 October 18.0 12.9 14.8 1.4 31 Period Statistics 21.8 12.9 18.7 2.3 WT-5 April 12.5 6.7 10.6 1.1 30 May 18.0 11.5 14.4 3.0 31 June 20.5 17.2 18.4 2.9 30 July 22.1 19.6 21.0 2.8 31 August 23.0 20.9 21.9 2.7 31 September 22.1 18.0 20.3 2.1 30 October 17.9 13.5 15.2 1.4 31 Period Statistics 23.0 6.7 17.4 2.3 WT-6 April -- -- -- -- 0 May -- -- -- -- 0 June 19.3 16.3 17.5 1.3 26 July 20.6 18.3 19.5 0.9 31 August 21.2 19.6 20.3 0.6 31 September 20.9 18.3 19.6 0.4 29 October -- -- -- -- 0 Period Statistics 21.2 16.3 19.3 0.8 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 11 March 2026 Poe Project, FERC No. 2107 © 2026, 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 6.3 to 21.3C (Table 2). The maximum hourly average temperature (22.9C) occurred on August 13, 2025 (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 1.6°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) – 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 12 March 2026 Poe Project, FERC No. 2107 © 2026, 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 4 through October 31 ranged from 12.9 to 21.8C (Table 2). The maximum hourly average temperature (23.2C) occurred on August 13, 2025 (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 2.3°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) – 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 13 March 2026 Poe Project, FERC No. 2107 © 2026, 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 6.7 to 23.0C (Table 2). The maximum hourly average temperature (24.6C) occurred on August 12, 2025 (Appendix C1). This location represents the longest travel distance between stations. The diel range at this station averaged 2.3°C, which is similar to WT-4 (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) – 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 14 March 2026 Poe Project, FERC No. 2107 © 2026, 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 June 5 through September 30 ranged from 16.3 to 21.2C (Table 2). The maximum hourly average temperature (21.6C) occurred on August 26, 2025 (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 0.8°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) – 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 15 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 3.4 COMPARISON OF WATER TEMPERATURES IN POE PROJECT The mean daily water temperatures from each station monitored in 2025 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, (PG&E 2025), mean daily water temperatures at Station WT-3 (end of upper Poe Reach) ranged from “no measurable” difference to 0.2°C warmer, than water temperatures at the first two stations (WT-1, WT-2). Therefore, 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 0.1°C to 0.6°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 0.8°C to 2.2°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 reach 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 0.2°C cooler to 0.4°C warmer than those observed at WT-3 (initial condition). Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 16 March 2026 Poe Project, FERC No. 2107 © 2026, 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 - 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 17 March 2026 Poe Project, FERC No. 2107 © 2026, 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 2025 monitoring period for each station are presented in Table 3. The annual MWAT value for the initial condition (WT-3: below Poe Dam) in 2025 was 20.9°C. For the terminal condition in the Poe Reach (WT-5: upstream of Poe Powerhouse), the MWAT in 2025 was 22.6°C. Figure 8 compares the running seven-day average water temperature for each station during the 2025 monitoring period. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 18 March 2026 Poe Project, FERC No. 2107 © 2026, 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 2025. Station Month MWAT Station Month MWAT WT-3 April 11.3 WT-4 April -- May 15.7 May -- June 18.0 June 18.5 July 19.9 July 20.5 August 20.9 August 21.4 September 20.7 September 21.0 October 18.3 October 18.6 MWAT 20.9 MWAT 21.4 WT-5 April 11.9 WT-6 April -- May 16.9 May -- June 19.1 June 18.1 July 21.6 July 19.9 August 22.6 August 20.8 September 21.8 September 20.8 October 19.0 October -- MWAT 22.6 MWAT 20.8 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 19 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Figure 8. Weekly (7-Day) running average water temperature at each station monitored in 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 20 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 3.6 2025 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 2025 monitoring period (April through October) are summarized in Table 4. In-stream flows at Gage NF-23 during the 2025 monitoring period ranged from 135 to 8,417 cfs. The average flow for the monitoring period was 937 cfs. 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 2025 monitoring period (April through October) are summarized in Table 4. Average daily discharge through the powerhouse for the 2025 monitoring period was 2,148 cfs and ranged from 406 to 3,955 cfs (Figure 9). A complete listing of hydrologic data used in this section is contained in Appendix D. 3.7 2025 METEOROLOGY Project-specific meteorology from the Poe Powerhouse station for the 2025 monitoring period are included in Table E-1 and E-2 (Appendix E). The peak mean daily air temperature for the period, which was 28.8°C, was recorded on August 25, 2025 (Table E-1). Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 21 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table 4. Summary of Poe Project flow during the 2025 monitoring period. Daily Average Data Station Description Month Maximum Minimum Mean Station NF-23 Flow (cfs) April 8417 1613 4318 (Release to Poe Reach) May 3806 548 1069 June 560 448 535 July 418 143 265 August 165 149 156 September 151 142 146 October 147 135 141 Period Statistics 8417 135 937 Poe Powerhouse Flow (cfs) April 3955 406 2345 May 3886 1665 3219 June 2752 1679 1995 July 2526 820 1824 August 2543 1121 2140 September 3000 1030 2215 October 1991 1021 1302 Period Statistics 3955 406 2148 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 22 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Figure 9. Daily average stream flow in the Poe Project area - 2025. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 23 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 4.0 REFERENCES CDEC. 2025. 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. 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. 2023. Water Temperature Monitoring – 2022 Annual Data Report. Poe Hydroelectric Project - FERC No. 2107. March 2023 Pacific Gas and Electric Company, Environmental Services. 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. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature 24 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company PG&E. 2025. Water Temperature Monitoring – 2024 Annual Data Report. Poe Hydroelectric Project - FERC No. 2107. March 2025 Pacific Gas and Electric Company, Environmental Services. PG&E. 2026. Hydrologic database provided by PG&E Hydro Generation Department, Pacific Gas and Electric Company. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company APPENDIX A WATER TEMPERATURE MONITORING PLAN Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-1 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company WATER TEMPERATURE MONITORING PLAN Poe Hydroelectric Project FERC Project No. 2107 Prepared By: Pacific Gas and Electric Company San Francisco, California May 2019 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-2 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table of Contents Page 1.0 Background and Introduction ..........................................................................................4 2.0 Monitoring Plan Objectives ..............................................................................................4 3.0 Study Area and Monitoring Locations ............................................................................5 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 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-3 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company List of Tables Page Table 3-1. Water Temperature Monitoring Site Locations at Poe Project ......................................3 List of Figures Page Figure 3-1. Water Temperature Monitoring Site Locations at Poe Project .....................................4 Attachments Attachment 1 FERC Article 401 Requirements Attachment 2 FERC Appendix A – Water Quality Certification Condition No. 10 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-4 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 1.0 BACKGROUND AND INTRODUCTION This Water Temperature Monitoring Plan (Temperature 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. Attachments 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). However, that data was not included in the annual reports, but will be summarized in the first annual report submitted under this Temperature Plan. 2.0 MONITORING PLAN OBJECTIVES The goal of the water temperature monitoring program is to document water 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 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-5 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 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 six (6) sites along the North Fork Feather River below Poe Dam. Table 3-1 provides details of each site. Final monitoring sites will be determined in consultation with Plumas County, Butte County, Forest Service, CDFW, USFWS, and SWRCB (collectively “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 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-6 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table 4-1. Water Temperature Monitoring Site Locations at Poe Project Site ID Site Description Near Historic Monitoring Points River Mile Below Poe Dam (RM) Approximate Location (UTM NAD 83) Latitude Longitude WT 1 D/S of Poe Dam Near Relic Site Poe 5; NF 17 0.15 39°48'30.95"N 121°26'7.11"W WT 2 D/S of Mill Creek Near FYLF Site 4a-d 0.52 39°48'17.52"N 121°26'25.03"W WT 3 D/S of Flea Valley Creek Pulga Bridge; Near NF-23; Near Relic Site FVC 1.40 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 (PH) D/S Poe PH 7.91 39°43'5.34"N 121°28'12.21"W 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) Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-7 March 2026 Poe Project, FERC No. 2107 © 2026, 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 six (6) sites will be monitored for water temperature using calibrated temperature sensors . They will be deployed annually at all six 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 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 ensure that the sensor stays submerged and is not exposed to direct sunlight. Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-8 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-9 March 2026 Poe Project, FERC No. 2107 © 2026, 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 reporting, prior to submission of the first year report, the format and content of the report will be discussed and agreed to with the government agencies. The first year report will also provide a history of temperature data collected in field studies since 2003. Following the first two years of monitoring, PG&E will submit the draft report to the government agencies on or before March 1 of the subsequent year. Following the third year of monitoring, PG&E will attempt to provide the draft report to the agencies before March 1, to allow agencies to make any adjustments to the monitoring plan. PG&E will allow the government agencies at least 30 days to review and comment on the draft report, and 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 will be reviewed by Agency Representatives for possible modifications. To support the 3-year review effort, PG&E will start discussions with Agency Representatives after two years of data are Document Accession #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-10 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company completed to begin assessing if changes to the Plan are anticipated. After the third year of data is collected, PG&E will provide the draft annual report to the government agencies by February 1 (normally it is March 1) such that reviews may begin earlier to determine if changes in monitoring locations are necessary. PG&E will set up a meeting with the government agencies in the month of February to review the draft report and discuss whether changes in monitoring locations or the monitoring plan are necessary. If changes in locations are recommended, PG&E will work with the government agencies, the Deputy Director, and FERC to seek approval to make changes prior to the next monitoring year. 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-11 March 2026 Poe Project, FERC No. 2107 © 2026, 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 the 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-12 March 2026 Poe Project, FERC No. 2107 © 2026, 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 into 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-13 March 2026 Poe Project, FERC No. 2107 © 2026, 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 #: 20260626-5136 Filed Date: 06/26/2026 2025 Poe Water Temperature A-14 March 2026 Poe Project, FERC No. 2107 © 2026, 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 #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX B – METHODOLOGY 2025 Poe Water Temperature March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company APPENDIX B METHODOLOGY Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX B – METHODOLOGY 2025 Poe Water Temperature B-1 March 2026 Poe Project, FERC No. 2107 © 2026, 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 #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company APPENDIX C WATER TEMPERATURE Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-1 March 2026 Poe Project, FERC No. 2107 © 2026, 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 04/01/25 6.8 7.4 6.2 -- -- -- 04/02/25 6.3 7.2 5.9 -- -- -- 04/03/25 7.4 8.0 7.0 -- -- -- 04/04/25 8.0 8.5 7.6 -- -- -- 04/05/25 8.5 9.0 8.1 -- -- -- 04/06/25 9.1 9.6 8.8 -- -- -- 04/07/25 9.7 9.9 9.6 -- -- -- 04/08/25 9.9 10.3 9.6 -- -- -- 04/09/25 10.0 10.4 9.6 -- -- -- 04/10/25 10.4 10.8 10.1 -- -- -- 04/11/25 10.7 11.0 10.4 -- -- -- 04/12/25 10.8 11.1 10.5 -- -- -- 04/13/25 10.6 11.1 10.2 -- -- -- 04/14/25 10.7 11.0 10.4 -- -- -- 04/15/25 11.1 11.6 10.7 -- -- -- 04/16/25 11.6 11.9 11.4 -- -- -- 04/17/25 11.6 12.0 11.3 -- -- -- 04/18/25 11.1 11.8 10.7 -- -- -- 04/19/25 10.6 10.9 10.4 -- -- -- 04/20/25 10.8 11.1 10.5 -- -- -- 04/21/25 11.5 11.7 11.0 -- -- -- 04/22/25 11.7 12.0 11.4 -- -- -- 04/23/25 11.6 11.9 11.2 -- -- -- 04/24/25 11.5 11.7 11.2 -- -- -- 04/25/25 11.2 11.7 10.6 -- -- -- 04/26/25 10.3 10.7 9.6 -- -- -- 04/27/25 9.3 9.5 9.0 -- -- -- 04/28/25 9.4 9.8 9.0 -- -- -- 04/29/25 10.8 11.3 9.8 -- -- -- 04/30/25 12.0 12.3 11.3 -- -- -- 05/01/25 12.4 12.7 12.0 -- -- -- 05/02/25 12.6 12.8 12.1 -- -- -- 05/03/25 12.6 13.1 12.1 -- -- -- 05/04/25 12.3 12.5 12.0 -- -- -- 05/05/25 -- -- -- -- -- -- 05/06/25 -- -- -- -- -- -- 05/07/25 -- -- -- -- -- -- 05/08/25 -- -- -- -- -- -- 05/09/25 -- -- -- -- -- -- 05/10/25 -- -- -- -- -- -- 05/11/25 -- -- -- -- -- -- 05/12/25 -- -- -- -- -- -- 05/13/25 -- -- -- -- -- -- 05/14/25 -- -- -- -- -- -- Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-2 March 2026 Poe Project, FERC No. 2107 © 2026, 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 05/15/25 -- -- -- -- -- -- 05/16/25 13.5 14.2 12.5 -- -- -- 05/17/25 13.8 14.2 13.4 -- -- -- 05/18/25 13.2 13.6 12.8 -- -- -- 05/19/25 13.5 14.3 12.6 -- -- -- 05/20/25 14.0 14.8 13.3 -- -- -- 05/21/25 14.1 14.9 13.4 -- -- -- 05/22/25 14.1 15.0 13.4 -- -- -- 05/23/25 14.1 14.9 13.5 -- -- -- 05/24/25 14.5 15.4 13.6 -- -- -- 05/25/25 15.1 16.0 14.2 -- -- -- 05/26/25 15.1 16.0 14.6 -- -- -- 05/27/25 15.1 16.0 14.3 -- -- -- 05/28/25 15.8 16.9 14.8 -- -- -- 05/29/25 16.0 16.9 15.4 -- -- -- 05/30/25 16.3 17.4 15.3 -- -- -- 05/31/25 16.7 17.8 15.9 -- -- -- 06/01/25 16.8 17.8 16.0 -- -- -- 06/02/25 16.7 17.7 16.0 -- -- -- 06/03/25 16.8 17.9 15.9 -- -- -- 06/04/25 16.9 18.0 16.1 17.4 18.9 16.3 06/05/25 16.9 18.0 15.9 17.3 18.8 16.1 06/06/25 17.1 18.0 16.2 17.6 18.9 16.5 06/07/25 17.3 18.2 16.5 17.9 19.1 16.8 06/08/25 17.5 18.2 17.0 18.1 19.1 17.3 06/09/25 17.7 18.5 17.0 18.3 19.6 17.4 06/10/25 17.9 18.7 17.2 18.5 19.7 17.5 06/11/25 17.8 18.5 17.2 18.4 19.4 17.5 06/12/25 17.6 18.2 17.1 18.1 19.2 17.2 06/13/25 17.1 17.5 16.5 17.6 18.5 16.7 06/14/25 16.7 17.1 16.2 17.1 18.1 16.3 06/15/25 16.3 16.9 15.8 16.8 17.9 15.9 06/16/25 16.1 16.7 15.5 16.5 17.5 15.6 06/17/25 16.3 17.1 15.5 16.8 18.0 15.8 06/18/25 16.8 17.9 15.7 17.2 18.8 16.0 06/19/25 17.7 18.7 16.8 18.1 19.4 17.1 06/20/25 17.7 18.4 17.1 18.1 19.1 17.3 06/21/25 17.0 17.6 16.3 17.4 18.2 16.6 06/22/25 16.3 17.1 15.5 16.7 17.9 15.7 06/23/25 16.6 17.6 15.7 16.9 18.3 15.9 06/24/25 17.1 18.0 16.2 17.5 18.8 16.4 06/25/25 17.5 18.4 16.6 17.9 19.3 16.8 06/26/25 17.7 18.6 16.9 18.0 19.4 17.0 06/27/25 17.7 18.6 16.9 18.2 19.5 17.1 06/28/25 18.2 18.9 17.4 18.6 20.0 17.6 06/29/25 18.8 19.6 18.3 19.3 20.9 18.3 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-3 March 2026 Poe Project, FERC No. 2107 © 2026, 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 06/30/25 19.3 19.9 18.7 19.7 21.1 18.9 07/01/25 19.4 20.2 18.7 19.9 21.2 19.0 07/02/25 19.5 20.3 18.8 20.0 21.4 19.0 07/03/25 19.6 20.4 19.0 20.1 21.4 19.2 07/04/25 19.3 20.0 18.8 19.7 20.9 19.0 07/05/25 18.7 19.5 18.0 19.1 20.5 18.0 07/06/25 18.4 19.3 17.6 18.8 20.4 17.6 07/07/25 18.7 19.7 17.9 19.1 20.7 18.0 07/08/25 19.2 20.2 18.5 19.5 21.1 18.5 07/09/25 19.4 20.4 18.7 19.7 21.4 18.6 07/10/25 19.5 20.9 18.6 19.9 21.7 18.6 07/11/25 19.5 20.7 18.8 20.1 21.7 18.9 07/12/25 19.9 21.1 18.9 20.4 22.0 19.4 07/13/25 20.4 21.3 19.6 20.9 22.3 20.0 07/14/25 -- -- -- 21.3 23.1 20.0 07/15/25 -- -- -- 20.0 21.6 18.6 07/16/25 -- -- -- 20.0 21.6 18.7 07/17/25 -- -- -- 20.2 21.9 19.0 07/18/25 -- -- -- 20.0 21.7 18.6 07/19/25 -- -- -- 19.9 21.8 18.3 07/20/25 -- -- -- 20.1 22.0 18.6 07/21/25 -- -- -- 19.5 20.4 18.7 07/22/25 18.5 19.8 17.4 19.0 20.5 17.7 07/23/25 18.9 20.4 18.0 19.3 21.1 17.9 07/24/25 19.2 20.4 18.3 19.6 21.1 18.3 07/25/25 19.5 21.1 18.5 20.0 21.4 18.7 07/26/25 19.7 21.4 18.7 20.2 21.5 18.9 07/27/25 19.7 21.3 18.7 20.4 21.9 18.8 07/28/25 20.0 21.7 18.9 20.5 22.3 18.9 07/29/25 20.3 22.0 19.2 20.7 22.5 19.1 07/30/25 20.2 21.6 19.5 20.7 21.7 19.5 07/31/25 20.2 21.8 19.3 20.8 22.5 19.3 08/01/25 20.0 21.7 18.9 20.6 22.2 19.0 08/02/25 19.9 21.6 18.9 20.5 22.2 18.9 08/03/25 19.8 21.5 18.9 20.3 22.0 18.7 08/04/25 19.8 21.4 18.8 20.2 21.6 18.7 08/05/25 19.8 21.5 18.8 20.2 21.7 18.6 08/06/25 19.7 21.0 18.9 20.0 21.5 18.5 08/07/25 19.7 21.3 18.7 20.2 21.8 18.6 08/08/25 19.9 21.7 18.9 20.4 22.2 18.7 08/09/25 20.3 22.0 19.2 20.8 22.5 19.1 08/10/25 20.6 22.3 19.6 21.1 22.8 19.5 08/11/25 20.9 22.6 19.9 21.4 23.0 19.8 08/12/25 21.1 22.8 20.1 21.7 23.1 20.2 08/13/25 21.3 22.9 20.3 21.8 23.2 20.4 08/14/25 20.9 22.5 19.9 21.4 22.7 19.9 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-4 March 2026 Poe Project, FERC No. 2107 © 2026, 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 08/15/25 20.8 22.3 19.8 21.2 22.6 19.8 08/16/25 20.6 22.1 19.8 21.1 22.5 19.7 08/17/25 20.6 22.1 19.8 21.2 22.4 20.0 08/18/25 20.1 21.6 19.2 20.5 21.7 19.1 08/19/25 19.8 21.4 19.0 20.1 21.6 18.5 08/20/25 19.8 21.6 18.7 20.1 21.7 18.3 08/21/25 20.1 21.8 19.1 20.4 22.1 18.7 08/22/25 20.2 21.9 19.2 20.6 22.2 18.9 08/23/25 20.6 22.2 19.5 21.0 22.5 19.5 08/24/25 20.9 22.5 20.0 21.4 22.8 20.0 08/25/25 21.1 22.6 20.3 21.7 23.1 20.3 08/26/25 20.8 22.0 20.2 21.3 22.3 20.3 08/27/25 21.0 22.5 20.2 21.5 22.8 20.2 08/28/25 20.7 22.3 19.8 21.1 22.3 19.6 08/29/25 20.5 22.1 19.7 20.7 22.2 19.0 08/30/25 20.5 22.1 19.7 20.7 22.2 19.2 08/31/25 20.6 22.2 19.8 20.7 22.1 19.2 09/01/25 20.7 22.4 19.8 20.9 22.4 19.2 09/02/25 20.7 22.1 20.1 20.9 22.0 19.7 09/03/25 20.7 22.2 20.0 21.1 22.3 19.9 09/04/25 20.9 22.4 20.2 21.3 22.6 20.0 09/05/25 20.8 22.3 20.0 21.2 22.2 19.9 09/06/25 20.6 22.0 19.8 20.8 21.9 19.5 09/07/25 20.4 21.5 19.8 20.5 21.4 19.3 09/08/25 20.0 21.4 19.3 20.1 21.3 18.8 09/09/25 19.9 20.6 19.5 20.1 20.7 19.6 09/10/25 19.7 20.8 19.3 19.9 20.6 19.1 09/11/25 19.4 20.3 18.9 19.6 20.4 18.8 09/12/25 19.3 20.8 18.4 19.7 20.8 18.5 09/13/25 19.6 21.1 18.8 19.9 21.1 18.5 09/14/25 19.7 21.1 18.9 19.9 21.1 18.7 09/15/25 19.4 20.8 18.7 19.7 20.9 18.4 09/16/25 19.2 20.7 18.4 19.5 20.7 18.1 09/17/25 19.3 20.8 18.4 19.4 20.8 17.9 09/18/25 19.2 20.3 18.6 19.4 20.3 18.2 09/19/25 19.1 19.7 18.8 19.5 20.1 19.0 09/20/25 19.2 20.3 18.5 19.6 20.5 18.7 09/21/25 19.2 20.5 18.5 19.6 20.7 18.5 09/22/25 19.1 20.5 18.5 19.5 20.6 18.3 09/23/25 19.0 20.5 18.3 19.3 20.4 18.0 09/24/25 19.0 20.4 18.2 19.1 20.2 17.8 09/25/25 18.9 20.0 18.2 19.2 20.3 18.1 09/26/25 18.7 19.9 18.0 19.1 20.1 18.0 09/27/25 18.4 19.6 17.9 18.8 19.9 17.8 09/28/25 18.2 19.2 17.6 18.6 19.4 17.8 09/29/25 17.9 18.2 17.8 18.2 18.8 17.9 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-5 March 2026 Poe Project, FERC No. 2107 © 2026, 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 09/30/25 18.1 18.3 17.9 18.1 18.3 18.0 10/01/25 17.7 17.9 17.3 18.0 18.2 17.8 10/02/25 17.2 17.5 16.9 17.4 17.8 17.1 10/03/25 16.9 17.5 16.5 17.1 17.7 16.6 10/04/25 16.7 17.7 16.2 16.8 17.9 15.9 10/05/25 16.3 17.4 15.8 16.6 17.6 15.6 10/06/25 16.2 17.3 15.7 16.4 17.4 15.4 10/07/25 16.2 17.3 15.7 16.4 17.5 15.4 10/08/25 16.0 17.1 15.5 16.3 17.3 15.1 10/09/25 16.1 17.0 15.7 16.4 17.3 15.7 10/10/25 16.1 16.8 15.8 16.3 16.8 16.0 10/11/25 15.6 15.9 15.1 15.7 16.4 15.3 10/12/25 14.9 15.7 14.5 15.0 15.9 14.2 10/13/25 14.5 14.8 14.2 14.6 15.2 14.3 10/14/25 14.0 14.3 13.8 14.2 14.5 14.0 10/15/25 13.8 14.1 13.5 13.9 14.2 13.7 10/16/25 13.6 14.6 13.2 13.8 14.8 12.9 10/17/25 13.6 14.5 13.2 13.9 14.9 12.9 10/18/25 13.9 14.9 13.4 14.1 15.2 13.2 10/19/25 13.8 14.7 13.4 14.1 14.8 13.4 10/20/25 13.8 14.7 13.4 14.1 15.1 13.3 10/21/25 13.8 14.8 13.4 14.2 15.1 13.3 10/22/25 13.6 14.2 13.3 13.9 14.5 13.3 10/23/25 13.5 14.4 13.1 13.8 14.7 13.0 10/24/25 13.4 14.2 12.9 13.7 14.3 12.9 10/25/25 13.4 13.6 13.3 13.8 14.2 13.6 10/26/25 13.3 13.4 13.2 13.5 13.7 13.4 10/27/25 13.0 13.7 12.5 13.6 14.3 13.1 10/28/25 12.5 13.2 12.0 12.9 13.7 12.2 10/29/25 12.7 13.5 12.2 13.0 13.9 12.3 10/30/25 12.9 13.7 12.5 13.3 14.1 12.5 10/31/25 13.0 13.7 12.6 13.3 14.1 12.5 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-6 March 2026 Poe Project, FERC No. 2107 © 2026, 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 04/01/25 7.3 7.8 6.7 -- -- -- 04/02/25 6.7 7.3 6.3 -- -- -- 04/03/25 7.8 8.3 7.3 -- -- -- 04/04/25 8.4 8.8 8.0 -- -- -- 04/05/25 8.9 9.3 8.6 -- -- -- 04/06/25 9.5 9.9 9.2 -- -- -- 04/07/25 10.1 10.4 9.9 -- -- -- 04/08/25 10.4 10.8 10.0 -- -- -- 04/09/25 10.5 10.7 10.1 -- -- -- 04/10/25 10.8 11.1 10.6 -- -- -- 04/11/25 11.2 11.4 11.0 -- -- -- 04/12/25 11.3 11.6 11.1 -- -- -- 04/13/25 11.1 11.3 10.8 -- -- -- 04/14/25 11.1 11.8 10.8 -- -- -- 04/15/25 11.5 11.9 10.9 -- -- -- 04/16/25 12.0 12.3 11.7 -- -- -- 04/17/25 12.1 12.3 11.8 -- -- -- 04/18/25 11.6 12.0 10.9 -- -- -- 04/19/25 11.2 12.1 10.7 -- -- -- 04/20/25 11.4 12.7 10.6 -- -- -- 04/21/25 12.0 13.3 11.1 -- -- -- 04/22/25 12.4 13.5 11.7 -- -- -- 04/23/25 12.3 13.4 11.6 -- -- -- 04/24/25 12.1 13.3 11.3 -- -- -- 04/25/25 11.6 11.9 10.9 -- -- -- 04/26/25 10.7 10.9 10.0 -- -- -- 04/27/25 9.7 10.0 9.5 -- -- -- 04/28/25 9.9 10.7 9.3 -- -- -- 04/29/25 11.2 12.2 10.0 -- -- -- 04/30/25 12.5 13.4 11.5 -- -- -- 05/01/25 13.0 14.1 12.2 -- -- -- 05/02/25 13.1 14.0 12.3 -- -- -- 05/03/25 13.1 13.7 12.6 -- -- -- 05/04/25 13.0 14.0 12.3 -- -- -- 05/05/25 12.6 14.0 11.7 -- -- -- 05/06/25 12.8 14.8 11.4 -- -- -- 05/07/25 13.3 15.2 11.8 -- -- -- 05/08/25 13.7 15.6 12.2 -- -- -- 05/09/25 13.9 15.9 12.5 -- -- -- 05/10/25 14.2 16.2 12.8 -- -- -- 05/11/25 14.1 15.7 13.0 -- -- -- 05/12/25 12.9 13.5 12.0 -- -- -- Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-7 March 2026 Poe Project, FERC No. 2107 © 2026, 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 05/13/25 11.5 12.4 10.7 -- -- -- 05/14/25 12.0 13.8 10.7 -- -- -- 05/15/25 13.0 15.1 11.4 -- -- -- 05/16/25 14.2 16.2 12.7 -- -- -- 05/17/25 14.5 15.7 13.7 -- -- -- 05/18/25 14.2 15.8 12.9 -- -- -- 05/19/25 14.3 16.5 12.6 -- -- -- 05/20/25 14.9 17.0 13.2 -- -- -- 05/21/25 15.0 17.1 13.3 -- -- -- 05/22/25 15.1 17.0 13.4 -- -- -- 05/23/25 15.2 17.0 13.5 -- -- -- 05/24/25 15.5 17.4 13.7 -- -- -- 05/25/25 16.1 17.9 14.4 -- -- -- 05/26/25 16.3 17.9 14.7 -- -- -- 05/27/25 16.2 18.0 14.5 -- -- -- 05/28/25 16.8 18.6 15.0 -- -- -- 05/29/25 17.2 18.9 15.6 -- -- -- 05/30/25 17.6 19.4 15.8 -- -- -- 05/31/25 18.0 19.8 16.2 -- -- -- 06/01/25 18.1 19.7 16.5 -- -- -- 06/02/25 17.9 19.4 16.4 -- -- -- 06/03/25 17.9 19.5 16.3 -- -- -- 06/04/25 18.1 19.4 16.7 -- -- -- 06/05/25 17.9 19.4 16.4 -- -- -- 06/06/25 18.2 19.7 16.8 17.2 17.9 16.5 06/07/25 18.5 20.0 17.1 17.4 18.4 16.7 06/08/25 18.8 19.9 17.7 17.7 18.4 17.2 06/09/25 19.1 20.7 17.7 17.8 18.6 17.2 06/10/25 19.3 20.8 17.9 18.0 18.8 17.4 06/11/25 19.2 20.6 17.9 18.0 18.8 17.3 06/12/25 18.8 20.2 17.5 17.9 18.4 17.3 06/13/25 18.4 19.7 17.1 17.4 18.0 16.8 06/14/25 17.7 19.1 16.4 16.9 17.4 16.4 06/15/25 17.5 19.0 16.1 16.5 17.1 16.0 06/16/25 17.2 18.6 15.8 16.3 16.9 15.6 06/17/25 17.4 19.0 15.9 16.4 17.2 15.7 06/18/25 17.8 19.4 16.2 16.8 17.9 16.0 06/19/25 18.6 20.2 17.2 17.8 18.6 17.0 06/20/25 18.6 19.8 17.4 17.9 18.3 17.3 06/21/25 18.0 19.1 16.9 17.2 17.8 16.7 06/22/25 17.2 18.5 15.9 16.5 17.0 15.9 06/23/25 17.3 18.9 15.9 16.6 17.5 15.9 06/24/25 18.0 19.6 16.5 17.2 18.0 16.4 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-8 March 2026 Poe Project, FERC No. 2107 © 2026, 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 06/25/25 18.5 20.0 17.0 17.5 18.2 16.8 06/26/25 18.7 20.2 17.1 17.7 18.4 17.0 06/27/25 18.9 20.4 17.3 17.8 18.6 17.1 06/28/25 19.3 21.1 17.7 18.2 19.0 17.6 06/29/25 20.0 21.8 18.3 18.9 19.6 18.5 06/30/25 20.5 22.1 18.9 19.3 19.9 18.9 07/01/25 20.6 22.2 19.2 19.4 20.0 18.8 07/02/25 20.9 22.3 19.4 19.5 20.1 19.0 07/03/25 20.9 22.3 19.4 19.7 20.2 19.1 07/04/25 20.5 21.7 19.1 19.5 20.0 19.0 07/05/25 19.7 21.2 18.2 18.8 19.5 18.2 07/06/25 19.6 21.0 17.9 18.4 19.0 17.8 07/07/25 19.9 21.5 18.2 18.7 19.4 18.1 07/08/25 20.2 21.8 18.7 19.3 19.8 18.9 07/09/25 20.2 21.9 18.5 19.6 20.1 19.0 07/10/25 20.6 22.1 18.9 19.6 20.2 19.0 07/11/25 21.2 22.5 19.7 19.6 20.1 18.8 07/12/25 21.5 23.1 20.1 20.1 20.7 19.6 07/13/25 21.9 23.5 20.4 20.6 21.2 19.8 07/14/25 22.1 23.7 20.6 20.5 21.1 19.7 07/15/25 21.7 22.7 20.4 19.1 19.5 18.6 07/16/25 21.1 22.4 19.8 19.4 20.0 18.8 07/17/25 21.1 22.7 19.7 19.6 19.9 19.2 07/18/25 21.2 22.6 19.9 19.2 19.5 18.8 07/19/25 21.0 22.6 19.7 19.3 19.8 19.0 07/20/25 21.2 22.7 20.1 19.7 19.8 19.4 07/21/25 20.6 21.4 20.0 19.2 19.4 18.8 07/22/25 20.0 21.7 18.8 18.3 18.8 17.8 07/23/25 20.2 21.9 19.0 18.8 19.3 18.4 07/24/25 20.7 22.1 19.5 19.2 19.6 18.8 07/25/25 21.1 22.4 20.0 19.3 19.7 19.0 07/26/25 21.4 22.9 20.3 19.5 19.8 19.2 07/27/25 21.6 23.4 20.2 19.6 19.8 19.4 07/28/25 21.7 23.4 20.4 19.9 20.3 19.6 07/29/25 21.8 23.5 20.6 20.3 20.7 19.9 07/30/25 21.7 22.9 20.9 20.3 20.7 20.1 07/31/25 21.8 23.6 20.5 20.0 20.3 19.7 08/01/25 22.1 23.8 20.9 19.8 20.1 19.5 08/02/25 21.8 23.5 20.5 19.9 20.1 19.7 08/03/25 21.6 23.2 20.4 19.8 20.0 19.5 08/04/25 21.3 22.9 20.2 19.7 19.9 19.3 08/05/25 21.2 22.9 20.0 19.8 20.1 19.4 08/06/25 21.0 22.4 19.9 19.8 20.0 19.4 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-9 March 2026 Poe Project, FERC No. 2107 © 2026, 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 08/07/25 21.1 22.8 19.8 19.6 19.9 19.2 08/08/25 21.5 23.2 20.2 19.8 20.2 19.4 08/09/25 21.9 23.6 20.7 20.1 20.5 19.7 08/10/25 22.2 23.9 21.0 20.4 20.8 20.0 08/11/25 22.6 24.3 21.3 20.7 20.9 20.2 08/12/25 22.9 24.6 21.7 21.0 21.4 20.6 08/13/25 23.0 24.6 21.8 21.1 21.3 20.7 08/14/25 22.8 24.3 21.6 20.8 21.1 20.5 08/15/25 22.4 23.9 21.2 20.7 21.0 20.3 08/16/25 22.2 23.8 21.0 20.6 20.8 20.3 08/17/25 22.3 23.8 21.3 20.5 20.6 20.3 08/18/25 21.6 23.0 20.4 20.1 20.4 19.9 08/19/25 20.9 22.5 19.6 19.7 20.1 19.4 08/20/25 21.0 22.6 19.8 19.8 20.1 19.5 08/21/25 21.3 23.0 20.0 20.0 20.4 19.7 08/22/25 21.6 23.2 20.3 20.1 20.6 19.8 08/23/25 22.1 23.8 20.8 20.4 20.7 20.1 08/24/25 22.2 23.5 21.3 20.7 21.0 20.5 08/25/25 22.6 24.1 21.4 20.9 21.1 20.7 08/26/25 22.3 23.0 21.8 21.2 21.6 20.7 08/27/25 22.3 23.8 21.2 20.8 21.0 20.6 08/28/25 22.3 23.7 21.1 20.7 20.9 20.4 08/29/25 21.5 22.7 20.4 20.7 20.8 20.5 08/30/25 21.3 22.8 20.3 20.7 20.8 20.5 08/31/25 21.3 22.8 20.3 20.7 20.9 20.6 09/01/25 21.4 23.0 20.2 20.8 21.0 20.6 09/02/25 21.4 22.4 20.7 20.8 21.1 20.7 09/03/25 21.6 23.0 20.4 20.7 21.0 20.5 09/04/25 22.1 23.6 21.0 20.9 21.1 20.8 09/05/25 22.0 23.4 20.9 20.9 21.1 20.6 09/06/25 21.6 22.9 20.5 20.7 20.9 20.4 09/07/25 20.9 22.0 20.0 20.7 20.9 20.4 09/08/25 20.6 22.1 19.5 20.1 20.4 19.9 09/09/25 20.7 21.6 20.1 20.0 20.1 20.0 09/10/25 20.4 21.5 19.6 19.8 20.0 19.7 09/11/25 20.0 20.7 19.3 19.6 19.7 19.4 09/12/25 20.3 21.8 19.1 19.3 19.8 19.1 09/13/25 20.5 21.9 19.4 19.7 19.8 19.6 09/14/25 20.6 22.1 19.6 19.8 20.1 19.7 09/15/25 20.4 21.8 19.4 19.4 19.6 19.3 09/16/25 20.3 21.7 19.2 19.3 19.4 19.1 09/17/25 20.0 21.3 18.9 19.4 19.5 19.3 09/18/25 19.8 20.7 19.1 19.3 19.5 19.2 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX C – WATER TEMPERATURE 2025 Poe Water Temperature C-10 March 2026 Poe Project, FERC No. 2107 © 2026, 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 09/19/25 19.8 20.3 19.4 19.3 19.3 19.2 09/20/25 20.1 21.7 19.0 19.2 19.3 19.0 09/21/25 20.3 21.6 19.3 19.2 19.4 19.0 09/22/25 20.3 21.4 19.3 19.1 19.3 19.0 09/23/25 20.0 21.2 19.0 19.2 19.2 19.1 09/24/25 19.7 20.9 18.8 19.1 19.2 19.0 09/25/25 19.8 21.2 18.8 19.0 19.3 18.7 09/26/25 19.7 20.9 18.7 18.8 19.2 18.5 09/27/25 19.5 20.7 18.4 18.5 18.8 18.3 09/28/25 19.3 20.1 18.6 18.3 18.6 18.1 09/29/25 18.6 19.1 18.2 18.3 18.5 18.2 09/30/25 18.0 18.2 17.8 -- -- -- 10/01/25 17.9 18.2 17.7 -- -- -- 10/02/25 17.6 18.0 17.4 -- -- -- 10/03/25 17.3 18.1 16.8 -- -- -- 10/04/25 17.2 18.3 16.5 -- -- -- 10/05/25 17.0 18.0 16.2 -- -- -- 10/06/25 16.7 17.5 15.9 -- -- -- 10/07/25 16.7 17.8 15.9 -- -- -- 10/08/25 16.7 17.8 15.9 -- -- -- 10/09/25 16.8 17.7 16.2 -- -- -- 10/10/25 16.8 17.7 16.4 -- -- -- 10/11/25 16.3 17.2 15.6 -- -- -- 10/12/25 15.1 15.7 14.2 -- -- -- 10/13/25 14.9 15.2 14.5 -- -- -- 10/14/25 14.3 14.4 14.0 -- -- -- 10/15/25 14.0 14.3 13.7 -- -- -- 10/16/25 14.0 15.0 13.2 -- -- -- 10/17/25 14.1 15.3 13.3 -- -- -- 10/18/25 14.4 15.6 13.7 -- -- -- 10/19/25 14.6 15.6 13.9 -- -- -- 10/20/25 14.4 15.5 13.6 -- -- -- 10/21/25 14.5 15.5 13.7 -- -- -- 10/22/25 14.3 14.6 14.0 -- -- -- 10/23/25 14.1 15.2 13.4 -- -- -- 10/24/25 14.0 14.7 13.4 -- -- -- 10/25/25 14.0 14.2 13.9 -- -- -- 10/26/25 13.7 13.8 13.6 -- -- -- 10/27/25 14.0 14.9 13.5 -- -- -- 10/28/25 13.7 14.4 13.0 -- -- -- 10/29/25 13.5 14.3 12.8 -- -- -- 10/30/25 13.6 14.4 12.9 -- -- -- 10/31/25 13.7 14.6 13.0 -- -- -- Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX D – HYDROLOGY 2025 Poe Water Temperature March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company APPENDIX D HYDROLOGY Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX D – HYDROLOGY 2025 Poe Water Temperature D-1 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table D-1. Daily average flow from Poe Project stations - 2025 Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 4/1/2025 8417 406 4/2/2025 7572 899 4/3/2025 5770 2100 4/4/2025 5528 2103 4/5/2025 5284 2098 4/6/2025 5006 2089 4/7/2025 5580 2070 4/8/2025 5552 2067 4/9/2025 5289 2054 4/10/2025 5265 2073 4/11/2025 5082 2100 4/12/2025 5189 2024 4/13/2025 4431 2545 4/14/2025 3601 3039 4/15/2025 5171 1673 4/16/2025 5267 1673 4/17/2025 5277 1680 4/18/2025 4357 2306 4/19/2025 2166 3938 4/20/2025 2052 3947 4/21/2025 2096 3953 4/22/2025 1961 3955 4/23/2025 1723 3948 4/24/2025 1613 3879 4/25/2025 3347 2261 4/26/2025 3206 2181 4/27/2025 3146 2173 4/28/2025 3400 1773 4/29/2025 3530 1672 4/30/2025 3657 1674 5/1/2025 3410 1674 5/2/2025 3806 1665 5/3/2025 3617 1700 5/4/2025 2007 3191 5/5/2025 1155 3886 5/6/2025 934 3832 5/7/2025 889 3781 5/8/2025 900 3781 5/9/2025 902 3718 5/10/2025 903 3710 5/11/2025 901 3713 5/12/2025 912 3694 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX D – HYDROLOGY 2025 Poe Water Temperature D-2 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 5/13/2025 911 3773 5/14/2025 914 3513 5/15/2025 903 3022 5/16/2025 905 3142 5/17/2025 892 3277 5/18/2025 780 3262 5/19/2025 716 3282 5/20/2025 649 3360 5/21/2025 600 3365 5/22/2025 551 3444 5/23/2025 553 3405 5/24/2025 554 3176 5/25/2025 549 3213 5/26/2025 550 3177 5/27/2025 553 3127 5/28/2025 555 2942 5/29/2025 548 3081 5/30/2025 553 2946 5/31/2025 559 2933 6/1/2025 557 2752 6/2/2025 560 2730 6/3/2025 556 2633 6/4/2025 554 2562 6/5/2025 555 2030 6/6/2025 554 2012 6/7/2025 557 2030 6/8/2025 559 2009 6/9/2025 555 1948 6/10/2025 554 2004 6/11/2025 555 1904 6/12/2025 553 1679 6/13/2025 551 1697 6/14/2025 545 1686 6/15/2025 550 1782 6/16/2025 551 1799 6/17/2025 549 1887 6/18/2025 551 2000 6/19/2025 547 2020 6/20/2025 546 1887 6/21/2025 546 1967 6/22/2025 543 1683 6/23/2025 547 1974 6/24/2025 524 1740 6/25/2025 494 2043 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX D – HYDROLOGY 2025 Poe Water Temperature D-3 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 6/26/2025 494 2019 6/27/2025 492 1854 6/28/2025 448 1715 6/29/2025 457 1792 6/30/2025 457 2015 7/1/2025 417 1816 7/2/2025 418 1888 7/3/2025 398 1936 7/4/2025 394 1697 7/5/2025 352 1977 7/6/2025 357 1744 7/7/2025 359 2036 7/8/2025 337 1219 7/9/2025 335 1177 7/10/2025 313 1290 7/11/2025 314 1264 7/12/2025 288 820 7/13/2025 291 1054 7/14/2025 292 2330 7/15/2025 267 2526 7/16/2025 269 2034 7/17/2025 252 1929 7/18/2025 240 1972 7/19/2025 209 1452 7/20/2025 209 1536 7/21/2025 219 1785 7/22/2025 188 1975 7/23/2025 188 2043 7/24/2025 179 2351 7/25/2025 174 2209 7/26/2025 143 2204 7/27/2025 154 2145 7/28/2025 164 2522 7/29/2025 170 2112 7/30/2025 171 1710 7/31/2025 166 1803 8/1/2025 163 1975 8/2/2025 163 1749 8/3/2025 161 2007 8/4/2025 165 2543 8/5/2025 164 2101 8/6/2025 164 2121 8/7/2025 164 2236 8/8/2025 163 2276 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX D – HYDROLOGY 2025 Poe Water Temperature D-4 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 8/9/2025 162 2244 8/10/2025 160 2379 8/11/2025 156 2385 8/12/2025 153 2298 8/13/2025 155 2473 8/14/2025 152 2413 8/15/2025 156 2253 8/16/2025 156 1726 8/17/2025 155 1700 8/18/2025 152 1793 8/19/2025 153 2322 8/20/2025 155 2360 8/21/2025 154 2214 8/22/2025 150 2295 8/23/2025 154 2150 8/24/2025 152 2327 8/25/2025 155 2169 8/26/2025 156 1121 8/27/2025 150 2233 8/28/2025 149 2101 8/29/2025 152 1953 8/30/2025 152 2113 8/31/2025 149 2304 9/1/2025 147 2424 9/2/2025 149 2414 9/3/2025 149 2482 9/4/2025 150 2226 9/5/2025 149 2171 9/6/2025 151 2532 9/7/2025 146 2179 9/8/2025 145 2400 9/9/2025 146 2592 9/10/2025 147 2476 9/11/2025 147 2221 9/12/2025 142 3000 9/13/2025 144 2408 9/14/2025 144 2078 9/15/2025 142 2538 9/16/2025 145 2413 9/17/2025 146 2609 9/18/2025 146 2547 9/19/2025 142 2719 9/20/2025 146 2220 9/21/2025 149 2148 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX D – HYDROLOGY 2025 Poe Water Temperature D-5 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 9/22/2025 148 2744 9/23/2025 148 2503 9/24/2025 146 2138 9/25/2025 143 1538 9/26/2025 144 1474 9/27/2025 146 1407 9/28/2025 146 1598 9/29/2025 143 1030 9/30/2025 146 1212 10/1/2025 145 1173 10/2/2025 146 1304 10/3/2025 144 1026 10/4/2025 144 1288 10/5/2025 143 1193 10/6/2025 143 1207 10/7/2025 140 1182 10/8/2025 138 1021 10/9/2025 139 1211 10/10/2025 140 1213 10/11/2025 136 1174 10/12/2025 142 1154 10/13/2025 138 1248 10/14/2025 141 1194 10/15/2025 138 1076 10/16/2025 140 1194 10/17/2025 136 1303 10/18/2025 138 1199 10/19/2025 136 1153 10/20/2025 138 1182 10/21/2025 135 1188 10/22/2025 136 1143 10/23/2025 146 1299 10/24/2025 147 1328 10/25/2025 144 1261 10/26/2025 145 1258 10/27/2025 145 1313 10/28/2025 140 1925 10/29/2025 139 1975 10/30/2025 139 1991 10/31/2025 139 1986 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company APPENDIX E METEOROLOGY Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-1 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Table E-1. Summary of air temperature data from Poe Powerhouse station. Air Temperature (°C) Date Average Maximum Minimum 4/1/2025 7.3 9.9 4.9 4/2/2025 7.2 14.8 1.9 4/3/2025 8.8 17.7 2.0 4/4/2025 11.1 21.3 4.0 4/5/2025 12.6 22.1 4.8 4/6/2025 13.2 22.0 5.9 4/7/2025 13.5 17.3 10.3 4/8/2025 13.6 20.7 8.2 4/9/2025 14.8 25.8 6.9 4/10/2025 15.7 24.4 8.3 4/11/2025 17.1 25.2 11.0 4/12/2025 14.8 22.3 9.4 4/13/2025 17.2 27.6 8.6 4/14/2025 17.4 28.3 9.3 4/15/2025 15.8 23.1 8.2 4/16/2025 15.7 20.0 11.8 4/17/2025 13.8 19.6 10.2 4/18/2025 14.1 24.6 7.0 4/19/2025 13.7 23.0 5.8 4/20/2025 14.9 24.3 7.2 4/21/2025 16.5 26.6 8.9 4/22/2025 16.4 26.0 8.3 4/23/2025 14.0 20.9 7.8 4/24/2025 13.2 19.3 7.5 4/25/2025 11.8 13.4 8.6 4/26/2025 8.9 10.5 7.7 4/27/2025 10.1 12.9 8.4 4/28/2025 14.5 24.8 7.7 4/29/2025 16.2 24.2 8.2 4/30/2025 18.7 28.9 11.3 5/1/2025 18.2 29.6 9.0 5/2/2025 17.3 25.8 10.4 5/3/2025 15.8 21.8 11.3 5/4/2025 16.7 25.6 9.5 5/5/2025 17.2 28.6 9.2 5/6/2025 17.4 28.3 7.7 5/7/2025 16.8 25.3 9.1 5/8/2025 18.1 28.7 9.6 5/9/2025 18.9 30.6 9.3 5/10/2025 19.5 31.3 10.2 5/11/2025 17.3 23.2 10.5 5/12/2025 12.0 15.3 8.4 5/13/2025 11.9 19.8 7.0 5/14/2025 14.1 22.8 6.6 5/15/2025 15.9 25.0 8.2 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-2 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 5/16/2025 18.8 27.2 11.7 5/17/2025 16.5 22.2 12.0 5/18/2025 16.4 26.2 7.8 5/19/2025 18.1 28.2 9.0 5/20/2025 17.5 27.5 9.6 5/21/2025 17.9 28.8 8.6 5/22/2025 17.7 25.8 10.3 5/23/2025 16.3 25.0 8.9 5/24/2025 18.0 27.5 10.3 5/25/2025 18.3 25.6 12.0 5/26/2025 17.2 24.8 11.1 5/27/2025 18.7 29.0 10.6 5/28/2025 20.7 29.9 13.2 5/29/2025 20.9 31.4 12.2 5/30/2025 23.5 36.5 14.2 5/31/2025 24.0 35.7 14.4 6/1/2025 22.4 31.1 14.7 6/2/2025 22.7 32.2 13.8 6/3/2025 21.0 29.5 13.6 6/4/2025 23.1 33.9 13.8 6/5/2025 21.3 30.4 13.0 6/6/2025 22.0 31.1 14.5 6/7/2025 23.6 33.3 15.5 6/8/2025 23.5 30.7 17.1 6/9/2025 24.5 33.6 16.9 6/10/2025 24.7 33.5 17.0 6/11/2025 22.3 29.5 16.4 6/12/2025 21.0 30.1 13.4 6/13/2025 20.4 28.8 12.9 6/14/2025 19.4 28.3 11.1 6/15/2025 20.4 30.3 11.1 6/16/2025 20.4 30.4 11.4 6/17/2025 21.6 32.2 12.2 6/18/2025 23.3 35.2 13.6 6/19/2025 22.5 30.9 14.8 6/20/2025 18.2 24.8 12.5 6/21/2025 18.6 25.6 11.5 6/22/2025 17.9 26.0 9.8 6/23/2025 21.6 31.6 11.7 6/24/2025 21.3 31.0 12.6 6/25/2025 21.8 32.4 13.2 6/26/2025 21.9 32.1 12.9 6/27/2025 23.2 33.7 13.9 6/28/2025 24.7 35.4 15.3 6/29/2025 25.2 35.2 16.5 6/30/2025 25.3 33.8 17.4 7/1/2025 26.0 35.0 17.8 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-3 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 7/2/2025 26.0 35.7 17.9 7/3/2025 24.5 31.3 17.8 7/4/2025 21.3 29.1 14.7 7/5/2025 20.5 30.0 11.9 7/6/2025 22.0 32.6 12.5 7/7/2025 23.7 34.2 14.6 7/8/2025 22.7 31.3 14.8 7/9/2025 22.4 32.7 13.5 7/10/2025 25.1 36.7 15.1 7/11/2025 26.3 36.7 17.2 7/12/2025 27.2 37.2 19.0 7/13/2025 26.9 36.3 19.0 7/14/2025 26.7 37.0 18.3 7/15/2025 24.8 33.3 16.2 7/16/2025 23.6 31.8 16.2 7/17/2025 23.1 32.6 15.1 7/18/2025 23.8 33.8 15.1 7/19/2025 23.9 33.9 15.1 7/20/2025 23.9 33.4 15.2 7/21/2025 21.1 26.6 15.5 7/22/2025 20.0 27.2 12.9 7/23/2025 21.0 29.0 13.8 7/24/2025 22.0 29.3 14.8 7/25/2025 22.8 29.4 17.2 7/26/2025 22.2 29.1 17.2 7/27/2025 22.5 30.7 15.7 7/28/2025 23.5 33.0 16.0 7/29/2025 24.2 33.9 15.8 7/30/2025 23.3 31.6 16.7 7/31/2025 24.3 33.7 16.4 8/1/2025 24.5 34.2 16.4 8/2/2025 23.8 34.3 15.3 8/3/2025 23.6 33.3 15.3 8/4/2025 22.1 31.5 14.7 8/5/2025 22.1 31.2 14.4 8/6/2025 22.8 33.3 13.9 8/7/2025 24.2 34.9 15.2 8/8/2025 25.6 36.6 15.8 8/9/2025 26.5 37.6 16.9 8/10/2025 26.8 38.0 17.9 8/11/2025 27.0 37.4 18.1 8/12/2025 26.8 36.6 18.7 8/13/2025 25.2 33.9 18.4 8/14/2025 24.3 33.9 16.3 8/15/2025 24.5 34.1 16.5 8/16/2025 23.1 30.0 16.6 8/17/2025 23.0 28.8 18.3 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-4 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 8/18/2025 20.4 29.5 13.2 8/19/2025 21.7 32.1 12.8 8/20/2025 24.1 36.9 14.1 8/21/2025 25.0 37.2 15.4 8/22/2025 25.9 37.4 16.1 8/23/2025 27.9 38.9 18.0 8/24/2025 26.6 37.3 19.5 8/25/2025 28.8 37.7 21.1 8/26/2025 25.6 31.7 21.1 8/27/2025 25.1 32.6 18.3 8/28/2025 24.2 35.2 15.7 8/29/2025 23.7 34.8 15.3 8/30/2025 24.4 35.9 15.8 8/31/2025 24.7 36.0 16.1 9/1/2025 25.4 38.0 16.1 9/2/2025 26.4 38.4 18.2 9/3/2025 26.3 34.6 18.9 9/4/2025 25.2 34.3 17.9 9/5/2025 22.7 31.1 15.7 9/6/2025 21.6 29.2 14.7 9/7/2025 20.4 29.0 13.5 9/8/2025 20.5 27.3 13.2 9/9/2025 21.6 24.4 18.9 9/10/2025 19.9 24.4 16.0 9/11/2025 20.3 25.9 14.7 9/12/2025 21.0 28.4 14.5 9/13/2025 21.2 29.7 14.6 9/14/2025 21.2 29.3 14.9 9/15/2025 21.6 32.1 13.7 9/16/2025 22.4 33.9 14.0 9/17/2025 23.1 35.3 14.9 9/18/2025 23.4 32.2 16.4 9/19/2025 21.6 23.4 19.8 9/20/2025 22.1 29.0 16.0 9/21/2025 22.5 31.6 15.6 9/22/2025 23.5 34.8 15.4 9/23/2025 24.1 37.0 15.3 9/24/2025 22.4 30.6 16.4 9/25/2025 22.2 30.3 16.4 9/26/2025 22.7 35.5 13.6 9/27/2025 21.5 30.6 14.0 9/28/2025 18.3 21.9 14.8 9/29/2025 18.1 19.7 15.9 9/30/2025 17.4 20.6 15.8 10/1/2025 16.6 20.7 14.3 10/2/2025 15.8 18.6 14.0 10/3/2025 15.3 20.1 12.7 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-5 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 10/4/2025 16.0 25.0 10.2 10/5/2025 17.3 27.3 11.1 10/6/2025 19.1 30.0 12.7 10/7/2025 19.6 30.2 13.9 10/8/2025 18.4 27.8 11.5 10/9/2025 17.7 22.3 14.1 10/10/2025 17.5 21.2 14.8 10/11/2025 13.6 19.4 9.4 10/12/2025 13.8 21.7 7.0 10/13/2025 13.3 17.5 11.1 10/14/2025 11.3 13.4 10.4 10/15/2025 11.4 15.4 8.8 10/16/2025 12.5 23.3 5.9 10/17/2025 13.7 22.5 7.7 10/18/2025 15.1 24.7 9.0 10/19/2025 15.4 25.4 9.3 10/20/2025 15.9 26.7 9.6 10/21/2025 15.9 27.6 9.1 10/22/2025 14.7 18.8 10.7 10/23/2025 14.0 22.5 8.7 10/24/2025 13.9 21.7 7.5 10/25/2025 14.4 15.9 12.3 10/26/2025 13.1 15.2 11.0 10/27/2025 14.4 20.3 10.7 10/28/2025 13.7 21.5 9.3 10/29/2025 16.0 28.3 10.1 10/30/2025 15.1 25.4 9.2 10/31/2025 15.0 25.6 8.9 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-6 March 2026 Poe Project, FERC No. 2107 © 2026, 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) 4/1/2025 85.7 1.4 163.3 69.4 4/2/2025 80.6 0.9 197.9 203.2 4/3/2025 73.6 0.9 181.9 249.6 4/4/2025 61.2 1.4 207.3 254.1 4/5/2025 62.8 1.0 161.6 251.0 4/6/2025 68.4 0.9 167.4 217.2 4/7/2025 79.9 1.1 169.4 157.3 4/8/2025 78.4 0.8 184.1 253.1 4/9/2025 70.9 0.6 169.3 262.0 4/10/2025 72.0 0.8 177.0 218.2 4/11/2025 70.1 0.7 178.5 222.8 4/12/2025 72.9 0.8 171.7 276.3 4/13/2025 48.8 1.9 223.2 279.9 4/14/2025 48.9 1.3 188.2 284.3 4/15/2025 70.2 1.0 156.5 272.1 4/16/2025 76.7 1.0 158.3 249.1 4/17/2025 77.3 1.3 164.2 218.7 4/18/2025 60.5 1.2 218.1 296.7 4/19/2025 60.3 0.8 165.8 290.1 4/20/2025 69.9 0.8 168.0 287.6 4/21/2025 67.9 0.7 185.1 286.5 4/22/2025 64.4 0.8 152.9 290.4 4/23/2025 70.9 0.9 172.5 291.7 4/24/2025 75.3 1.0 165.9 269.9 4/25/2025 72.1 1.1 176.4 86.9 4/26/2025 88.1 0.6 169.0 52.1 4/27/2025 88.6 0.6 174.7 75.8 4/28/2025 72.9 0.9 159.8 303.9 4/29/2025 73.3 0.8 168.6 263.9 4/30/2025 66.0 0.8 181.3 305.2 5/1/2025 63.0 0.7 181.0 308.5 5/2/2025 68.2 0.9 173.8 304.4 5/3/2025 73.7 1.0 160.4 273.8 5/4/2025 60.4 1.9 216.1 303.0 5/5/2025 46.9 1.3 223.8 319.0 5/6/2025 52.0 1.5 231.2 322.5 5/7/2025 65.7 0.9 172.5 306.6 5/8/2025 65.1 0.6 172.2 315.2 5/9/2025 61.5 0.7 178.0 314.0 5/10/2025 57.0 0.7 170.4 322.3 5/11/2025 55.3 1.6 166.5 277.9 5/12/2025 75.7 1.4 189.1 80.0 5/13/2025 78.0 0.9 171.7 231.7 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-7 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 5/14/2025 70.3 0.8 174.9 302.2 5/15/2025 68.8 0.8 163.7 316.2 5/16/2025 66.3 0.8 155.6 316.0 5/17/2025 68.4 1.0 194.5 251.2 5/18/2025 57.5 1.2 194.5 329.4 5/19/2025 59.2 1.0 166.9 329.0 5/20/2025 62.0 0.7 174.0 333.2 5/21/2025 59.5 0.8 159.5 331.4 5/22/2025 60.8 0.8 180.5 331.2 5/23/2025 66.6 0.9 169.3 333.4 5/24/2025 69.5 0.9 170.4 324.9 5/25/2025 70.6 1.1 161.4 317.2 5/26/2025 68.8 0.9 162.2 330.0 5/27/2025 70.1 0.9 159.8 325.2 5/28/2025 66.1 0.8 170.9 329.2 5/29/2025 69.2 0.8 165.7 313.8 5/30/2025 69.6 0.7 189.1 330.2 5/31/2025 60.9 0.5 169.1 335.5 6/1/2025 63.0 0.9 164.1 331.4 6/2/2025 57.8 1.1 203.8 329.5 6/3/2025 68.3 1.0 160.3 327.8 6/4/2025 55.0 1.0 195.3 333.3 6/5/2025 61.2 0.7 165.1 330.8 6/6/2025 66.0 0.8 165.6 325.5 6/7/2025 67.2 0.8 169.5 315.3 6/8/2025 72.8 0.9 163.1 256.6 6/9/2025 68.3 1.0 160.5 320.4 6/10/2025 66.9 0.9 169.3 329.4 6/11/2025 68.1 1.0 162.0 339.5 6/12/2025 61.6 0.8 159.4 339.7 6/13/2025 59.5 1.0 169.4 342.6 6/14/2025 57.9 0.9 152.5 317.1 6/15/2025 54.9 0.8 164.5 341.2 6/16/2025 54.8 0.7 168.6 327.0 6/17/2025 57.5 0.9 161.6 339.3 6/18/2025 57.8 0.9 161.0 339.5 6/19/2025 57.2 1.0 160.4 341.2 6/20/2025 57.7 1.1 178.5 337.4 6/21/2025 43.7 1.2 203.6 338.8 6/22/2025 50.4 1.0 168.0 338.8 6/23/2025 47.5 1.3 184.9 335.6 6/24/2025 55.1 0.9 157.2 337.1 6/25/2025 56.5 0.8 164.6 341.2 6/26/2025 53.2 0.8 172.4 338.2 6/27/2025 54.9 0.8 154.5 335.6 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-8 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 6/28/2025 56.0 0.8 167.1 335.8 6/29/2025 58.5 0.9 159.9 328.3 6/30/2025 59.7 0.8 151.6 327.2 7/1/2025 57.1 0.8 164.1 319.5 7/2/2025 56.3 0.9 153.4 328.4 7/3/2025 56.6 1.2 162.2 316.7 7/4/2025 52.1 1.2 160.1 333.5 7/5/2025 50.7 1.0 169.8 337.8 7/6/2025 51.1 1.0 178.0 331.8 7/7/2025 52.4 0.9 169.4 329.0 7/8/2025 52.8 1.0 171.4 330.9 7/9/2025 51.8 0.8 170.5 334.5 7/10/2025 53.5 1.1 159.4 317.4 7/11/2025 57.6 0.9 155.9 313.7 7/12/2025 57.5 0.8 162.7 311.1 7/13/2025 57.2 0.9 164.1 306.9 7/14/2025 54.1 0.8 163.0 323.3 7/15/2025 54.8 1.0 163.4 318.7 7/16/2025 57.9 0.9 154.0 323.9 7/17/2025 56.8 0.9 167.5 323.4 7/18/2025 54.0 0.8 161.6 326.5 7/19/2025 53.7 0.9 162.9 329.0 7/20/2025 53.9 1.0 159.6 320.5 7/21/2025 64.9 0.9 168.6 174.6 7/22/2025 64.4 1.0 164.7 320.1 7/23/2025 61.3 1.0 169.4 314.8 7/24/2025 59.0 1.0 154.9 299.4 7/25/2025 60.1 1.0 162.4 282.5 7/26/2025 62.8 1.1 158.6 293.4 7/27/2025 63.2 0.9 154.0 308.5 7/28/2025 60.4 0.9 160.9 313.6 7/29/2025 55.7 0.8 165.4 315.2 7/30/2025 58.4 0.8 156.0 239.1 7/31/2025 57.3 0.9 178.0 307.5 8/1/2025 54.1 0.9 159.9 311.3 8/2/2025 52.8 0.8 153.3 313.1 8/3/2025 49.5 0.8 171.0 306.6 8/4/2025 53.1 0.8 168.1 306.7 8/5/2025 55.2 0.8 169.2 307.1 8/6/2025 51.3 0.7 164.1 263.4 8/7/2025 50.2 0.7 164.6 295.3 8/8/2025 49.3 0.7 164.0 296.3 8/9/2025 47.1 0.8 160.2 299.5 8/10/2025 47.3 0.8 172.0 294.4 8/11/2025 50.9 0.9 159.0 287.2 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-9 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 8/12/2025 54.1 0.9 161.4 283.9 8/13/2025 57.6 1.0 160.9 296.7 8/14/2025 58.0 0.9 163.5 290.2 8/15/2025 54.7 0.9 162.9 284.2 8/16/2025 60.0 1.0 171.0 281.0 8/17/2025 60.4 1.1 154.1 280.0 8/18/2025 55.8 1.0 170.1 285.9 8/19/2025 52.0 0.8 177.4 286.5 8/20/2025 50.1 0.9 166.0 283.1 8/21/2025 48.2 0.8 169.4 283.6 8/22/2025 46.6 0.7 168.1 269.4 8/23/2025 43.1 0.9 164.4 267.2 8/24/2025 47.9 0.7 166.8 191.9 8/25/2025 43.8 1.9 165.0 263.8 8/26/2025 54.9 1.2 180.3 157.6 8/27/2025 57.4 0.9 163.9 260.8 8/28/2025 50.6 0.7 170.4 271.7 8/29/2025 44.5 0.8 177.3 263.1 8/30/2025 43.5 0.7 174.3 260.9 8/31/2025 41.8 0.8 165.5 260.5 9/1/2025 42.8 0.8 199.0 259.9 9/2/2025 43.6 1.2 172.6 158.5 9/3/2025 49.5 1.2 184.2 229.1 9/4/2025 53.5 0.8 168.0 244.5 9/5/2025 58.5 1.0 179.2 251.1 9/6/2025 58.7 1.1 175.6 249.7 9/7/2025 58.6 0.8 186.9 206.1 9/8/2025 57.9 1.2 182.3 243.5 9/9/2025 61.9 1.5 165.5 187.2 9/10/2025 67.4 1.0 167.0 201.0 9/11/2025 67.1 0.8 175.9 173.8 9/12/2025 65.3 0.9 166.6 227.7 9/13/2025 64.0 0.9 172.7 227.2 9/14/2025 62.3 0.8 182.0 228.3 9/15/2025 57.2 0.8 166.5 231.6 9/16/2025 52.6 0.6 183.1 228.2 9/17/2025 47.1 0.8 169.2 227.3 9/18/2025 47.8 1.0 177.7 171.3 9/19/2025 64.5 0.8 173.9 76.9 9/20/2025 65.8 0.8 163.9 223.5 9/21/2025 62.9 0.7 175.1 207.1 9/22/2025 54.8 0.9 195.6 216.8 9/23/2025 44.8 1.0 204.5 219.2 9/24/2025 46.0 1.2 158.4 211.3 9/25/2025 52.6 0.9 177.5 210.5 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 APPENDIX E – METEOROLOGY 2025 Poe Water Temperature E-10 March 2026 Poe Project, FERC No. 2107 © 2026, Pacific Gas and Electric Company Daily Average Values Relative Humidity Wind Speed Wind direction Solar Radiation Date (%) (m/sec) (degrees) (W/m2) 9/26/2025 52.5 0.9 165.4 210.7 9/27/2025 53.1 0.8 177.2 203.3 9/28/2025 72.8 1.3 178.1 175.0 9/29/2025 76.6 1.0 164.8 46.1 9/30/2025 83.4 1.2 178.5 50.4 10/1/2025 85.7 0.8 176.8 57.2 10/2/2025 89.5 0.6 188.3 43.3 10/3/2025 84.2 0.8 190.8 151.7 10/4/2025 75.1 0.9 196.9 192.7 10/5/2025 65.3 1.1 173.2 192.5 10/6/2025 55.2 1.6 216.6 193.1 10/7/2025 53.6 1.3 180.0 186.6 10/8/2025 61.5 1.1 158.7 183.9 10/9/2025 63.0 1.3 152.5 146.0 10/10/2025 63.7 1.4 157.8 155.7 10/11/2025 72.5 0.8 185.8 162.3 10/12/2025 59.9 1.2 169.1 167.9 10/13/2025 70.9 1.1 174.1 77.9 10/14/2025 89.8 0.7 172.1 34.4 10/15/2025 84.7 0.5 165.7 65.8 10/16/2025 78.9 0.7 228.8 168.5 10/17/2025 74.9 0.9 179.1 163.8 10/18/2025 75.6 0.7 191.7 160.5 10/19/2025 72.3 0.5 192.3 138.0 10/20/2025 65.7 1.1 184.4 159.6 10/21/2025 66.8 0.7 189.3 157.2 10/22/2025 75.9 1.0 162.1 60.8 10/23/2025 78.7 0.8 197.7 151.9 10/24/2025 77.9 0.7 189.4 126.3 10/25/2025 83.7 1.4 164.1 21.1 10/26/2025 89.3 1.1 163.6 19.3 10/27/2025 86.1 0.8 178.0 144.4 10/28/2025 80.5 1.5 160.7 141.2 10/29/2025 73.5 1.1 198.7 142.3 10/30/2025 76.8 0.7 164.8 135.3 10/31/2025 75.9 0.8 182.8 139.9 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 ENCLOSURE  Document Accession #: 20260626-5136 Filed Date: 06/26/2026 From:Urias, Anna To:Fisch, Nathan@Waterboards; Dyke, Jessica@Waterboards; Sable, Kurt - FS, CA; Dawn Alvarez; Everest, Loren - FS, CA; Jonathan Berry; Brenzovich, Erika - FS, CA; Tracey Ferguson; Bartoo, Aondrea; Lawson, Beth@Wildlife; Michael Maher; Loeser, Kamie Cc:Salve, Rohit; Drummond, Duncan; Lent, Michelle; Joseph, Matthew Subject:FERC 2107: Poe 2025 Draft Water Temperature Monitoring Data Report Date:Wednesday, February 25, 2026 4:04:00 PM Attachments:P-2107_2025 Draft Water Temperature Data Report.pdf Poe Project_2025 Daily Average Water Temperature.xlsx Hi folks, Please see the attached 2025 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, 2026. Pursuant to the Plan, PG&E will include comments into the final report, which will be filed with FERC by June 30, 2026. Also attached is all data collected during 2025 in xlsx. format. 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 Document Accession #: 20260626-5136 Filed Date: 06/26/2026 Document Content(s) PGE20260626_2107_Poe_2025_WaterTempMonitoring_Ltr.pdf ....................1 PGE20260626_2107_Poe_2025_WaterTempMonitoring_Enc1.pdf....................3 PGE20260626_2107_Poe_2025_WaterTempMonitoring_Enc2.pdf...................79 Document Accession #: 20260626-5136 Filed Date: 06/26/2026