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06.28.2024 Board Correspondence - FW_ Environmental and Recreational Compliance Report submitted in FERC P-2107-000 by Pacific Gas and Electric Company,et al.
From:Clerk of the Board To:Bennett, Robin; Clerk of the Board; Connelly, Bill; Cook, Holly; Cook, Robin; Durfee, Peter; Jessee, Meegan; Kimmelshue, Tod; Kitts, Melissa; Lee, Lewis; Pickett, Andy; Ritter, Tami; Stephens, Brad J.; Sweeney, Kathleen; Teeter, Doug; Zepeda, Elizabeth; Loeser, Kamie Cc:Nevers, Dawn Subject:Board Correspondence - FW: Environmental and Recreational Compliance Report submitted in FERC P-2107-000 by Pacific Gas and Electric Company,et al. Date:Friday, June 28, 2024 4:36:32 PM Please see Board Correspondence - -----Original Message----- From: 'FERC eSubscription' <eSubscription@ferc.gov> Sent: Friday, June 28, 2024 10:25 AM Subject: Environmental and Recreational Compliance Report submitted in FERC P-2107-000 by Pacific Gas and Electric Company,et al. .ATTENTION: This message originated from outside Butte County. Please exercise judgment before opening attachments, clicking on links, or replying.. On 6/28/2024, the following Filing was submitted to the Federal Energy Regulatory Commission (FERC), Washington D.C.: Filer: Pacific Gas and Electric Company PG&E Corporation (as Agent) Docket(s): P-2107-000 Lead Applicant: Pacific Gas and Electric Company Filing Type: Environmental and Recreational Compliance Report Description: Pacific Gas and Electric Company submits Water Temperature Monitoring 2023 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=20240628- 5155__;!!KNMwiTCp4spf!HFZTuhaDt4l19Q_iOPU0h2Pfg0XWIE6YAVnQ0oOU3w_Jtoqxv0MJnWcSthWJ4mCRIXjAHEHzxowW2CeZ2UiFrG4IMvNyc38MTjtD$ To modify your subscriptions, click here: ------------------------------------------------------------------------ Please do not respond to this email. Online help is available here: https://urldefense.com/v3/__http://www.ferc.gov/efiling-help.asp__;!!KNMwiTCp4spf!HFZTuhaDt4l19Q_iOPU0h2Pfg0XWIE6YAVnQ0oOU3w_Jtoqxv0MJnWcSthWJ4mCRIXjAHEHzxowW2CeZ2UiFrG4IMvNyc2aUXlzF$ 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 28, 2024 Via Electronic Submittal (E-File) Debbie-Anne Reese, Acting 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 2023 Annual Data Report Dear Acting Secretary Reese: This letter presents Water Temperature Monitoring 2023 Annual Data Report for Pacific Gas and Electric Company’s (PG&E) Poe Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No. 2107. Pursuant to the Poe Water Temperature Monitoring Plan, approved by FERC December 10, 2019, PG&E developed a draft Water Temperature Monitoring 2023 Annual Data Report and, on February 28, 2024, submitted it to the Forest Service, State Water Resources Control Board, California Department of Fish and Wildlife, United States Fish and Wildlife Service, Butte County, and Plumas County (Agencies) for comment. The Forest Service and California Department of Fish and Wildlife provided comments concerning WT-2 and WT-6 sensors and the report has been adjusted accordingly. No additional Agency comments were received. The Water Temperature Monitoring 2023 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 Sky Ramirez-Doble, license coordinator for PG&E, at (530) 250-7002. Sincerely, Jamie Visinoni Senior License Coordinator Enclosures: 1. Water Temperature Monitoring 2023 Annual Data Report, prepared by PG&E, Sagraves Environmental Services, and Spring River Ecological Sciences LLC and dated June 2024 2. Agency Consultation Record via Email cc: See Attached List Document Accession #: 20240628-5155 Filed Date: 06/28/2024 Debbie-Anne Reese, Acting Secretary June 28, 2024 Page 2 cc: via email w/enclosures Lori Cayo, Forest Service - lori.cayo@usda.gov Dawn Alvarez, Forest Service - dawn.alvarez@usda.gov Kurt Sable, Forest Service - kurt.sable@usda.gov Leigh Bartoo, USFWS - Aondrea_Bartoo@fws.gov Beth Lawson, CDFW - Beth.Lawson@wildlife.ca.gov Michael Maher, CDFW – Michael.Maher@wildlife.ca.gov Peggy Moak, Butte County – pmoak@buttecounty.net Kelly Peterson, Butte County – Kpeterson@buttecounty.net Kamie Loser, Butte County - kloeser@buttecounty.net Tracey Ferguson, Plumas County – traceyferguson@countyofplumas.net Jessica Dyke, SWRCB - Jessica.Dyke@Waterboards.ca.gov Nathan Fisch, SWRCB - Nathan.Fisch@Waterboards.ca.gov Document Accession #: 20240628-5155 Filed Date: 06/28/2024 ENCLOSURE 1 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 WATER TEMPERATURE MONITORING 2023 Annual Data Report Poe Hydroelectric Project FERC Project No. 2107 June 2024 © 2024, Pacific Gas and Electric Company Document Accession #: 20240628-5155 Filed Date: 06/28/2024 PACIFIC GAS AND ELECTRIC COMPANY Poe Hydroelectric Project FERC Project No. 2107 WATER TEMPERATURE MONITORING 2023 Annual Data Report June 2024 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 © 2024, Pacific Gas and Electric Company Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature i June 2024 Poe Project, FERC No. 2107 © 2024, 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 ........................................................... Error! Bookmark not defined. 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 2023 Water Year Type .............................................................................................9 3.3 Water Temperature Monitoring ...............................................................................9 3.3.1 Station WT-1 ..............................................................................................13 3.3.2 Station WT-2 ..............................................................................................14 3.3.3 Station WT-3 ..............................................................................................15 3.3.4 Station WT-4 ..............................................................................................16 3.3.5 Station WT-5 ..............................................................................................17 3.3.6 Station WT-6 ..............................................................................................18 3.4 Comparison of Water Temperatures in Poe Project ..............................................19 3.5 Maximum Weekly Average Temperature (MWAT) .............................................21 3.6 2023 Stream Flow ..................................................................................................24 3.6.1 Poe Reach...................................................................................................24 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature ii June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.6.2 Poe Powerhouse .........................................................................................24 3.7 2023 Meteorology ..................................................................................................24 4.0 References .........................................................................................................................27 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 #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature iii June 2024 Poe Project, FERC No. 2107 © 2024, 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 mean water temperatures NFFR below Poe Dam (Station WT-1) – 2023. ......................................................................................13 Figure 4. Daily maximum, minimum, and average water temperatures NFFR above Mill Creek (Station WT-2) – 2023. ............................................................................14 Figure 5. Daily maximum, minimum, and average water temperatures NFFR at Pulga Bridge (Station WT-3) – 2023. ...................................................................................15 Figure 6. Daily maximum, minimum, and average water temperatures NFFR at Bardees Bar (Station WT-4) – 2023. ..........................................................................16 Figure 7. Daily maximum, minimum, and average water temperatures NFFR above Poe Powerhouse (Station WT-5) – 2023. ...................................................................17 Figure 8. Daily maximum, minimum, and average water temperatures NFFR below Poe Powerhouse (Station WT-6) – 2023. ...................................................................18 Figure 9. Comparison of daily average water temperature from the Poe Project of the NFFR with mean daily air temperatures from Poe Powerhouse - 2023. ....................20 Figure 10. Weekly (7-Day) running average water temperature at each station monitored in 2023. .......................................................................................................................23 Figure 11. Daily average stream flow in the Poe Project area - 2023. .........................................26 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature iv June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company LIST OF TABLES Page Table 1. Water Temperature Monitoring Locations and Description .........................................6 Table 2. Summary of 2023 continuous water temperature monitoring in the Poe Project. ........................................................................................................................11 Table 3. Summary of maximum weekly average water temperature (by month) and the absolute maximum weekly average temperature (MWAT) for each station monitored in 2023. ......................................................................................................22 Table 4. Summary of Poe Project flow during the 2023 monitoring period. ...........................25 Table 3-1. Water Temperature Monitoring Site Locations at Poe Project ................................ A-6 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 1 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 1.0 INTRODUCTION This annual report presents water temperature data collected during the 2023 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 for the Poe Project. This monitoring is conducted in accordance with the Water Temperature Monitoring Plan (PG&E 2019a), which was approved by FERC order on December 10, 2019. 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 large 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 #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 2 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Figure 1. Location of the Poe Hydroelectric Project in northeastern California. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 3 June 2024 Poe Project, FERC No. 2107 © 2024, 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 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, and 2022 water temperature monitoring efforts were presented as annual reports (PG&E 2021, 2022 and 2023, 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 #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 4 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 1.3 SCOPE OF REPORT The 2023 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 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 5 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 2.0 METHODS SUMMARY 2.1 WATER TEMPERATURE MONITORING 2.1.1 Sampling Locations Water temperature was monitored at six locations in the Poe Reach extending from immediately downstream of Poe Dam to downstream of Poe Powerhouse. Details about each station are included in Table 1. Figure 2 shows the location of all monitoring stations within the Project Reach. 2.1.2 Water Temperature Measurement Water temperature was continuously monitored from April through October 2023. All thermographs/data-loggers were set to record/store instantaneous water temperature at 15-minute intervals. Stored data were downloaded during monthly site visits and processed to generate hourly average and daily maximum, minimum, and mean water temperature values. Water temperature sensors were deployed in well-mixed areas of the stream with elevated velocity and adequate depth to ensure representative measurements. Each water temperature recorder was deployed inside a protective metal housing that was locked to the stream bank or in-channel substrate with a steel chain/cable. All monitoring locations were chosen based on safe accessibility and acceptable security from vandalism or theft. The 2023 monitoring program used Starmon Mini data-loggers at all locations. The Starmon Mini loggers are capable of recording temperatures accurately to ± 0.1°C, between -2°C and 40°C. A record of data-logger/sensor deployment is contained in Table B-1 (Appendix B). 2.2 QUALITY ASSURANCE AND CONTROL PROCEDURES To verify the operation and accuracy of the temperature recorders, all units were calibrated using an American Society for Testing and Materials (ASTM) reference thermometer, both prior to and following removal from in situ deployment. All instruments were calibration adjusted to achieve a maximum instrument error of approximately 0.1C. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 6 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table 1. Water Temperature Monitoring Locations and Description Site ID Site Description Near Historic Monitoring Points Approximate Location (UTM NAD 83) Latitude Longitude WT 1 Downstream of Poe Dam Near Relic Site Poe 5; NF 17 39°48'31.5"N 121°26'5.8"W WT 2 Upstream of Mill Creek Near FYLF Site 4a-d 39°48'19.6"N 121°26'23.1"W WT 3 At Pulga Bridge, NF-23 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 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 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 Located on exclusion buoy upstream of railroad bridge 39°43'5.3"N 121°28'13.1"W Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 7 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Figure 2. Water temperature monitoring stations. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 8 June 2024 Poe Project, FERC No. 2107 © 2024, 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 2023 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 on April 15, 2021. This station monitors conditions at the terminal end of the Poe Reach. Meteorological parameters include air temperature, wind speed and direction, relative humidity, and solar radiation. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 9 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.0 RESULTS 3.1 MONITORING ISSUES There were no issues with instrument operation or vandalism in 2023. High flows in the NFFR at various times during the monitoring period prevented safe access to the low-flow stream channel. As a result, installation was delayed at WT-1 and WT-4 until June 1, 2023, and the sensor at WT- 4 was out of the water for a period of 12 days in July after flow receded. WT-2 was installed on July 26, 2023, also in response to high flows in the river and subsequent lack of safe access. Data from WT-2 was not recovered until June 26, 2024, due to access issues associated with high flows in the river which made the installation site inaccessible. Data from WT-6 was recovered on April 9, 2024. However, data from the period April 1 2023 through September 11, 2023, was invalid due to the recorders becoming stranded on the bank after the boater safety exclusion buoy that the instruments were attached to (in order to facilitate accurate instream water temperatures at this location) broke free from its anchor points during the peak flows of March 14-15, 2023 (greater than 20,000 cfs at NF-23). The line was not restored until Sept 11, 2023, due to safety issues associated with persistent high flows in the system related to the wet water year. 3.2 2023 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 2023 reflected this dichotomy with the Department of Water Resource (DWR) classifying 2023 as a “Wet” year with regard to the greater Sacramento River Basin (CDEC 2023). However, in accordance with Condition No. 5B, Water Year Type as outlined in the RCC Project license, the 2023 water year was classified as “Wet” based on the May 1 estimated inflow to Lake Oroville (DWR Bulletin 120 May 2023). 3.3 WATER TEMPERATURE MONITORING In 2023 water temperatures were continuously monitored from April 1 through October 31 at three (WT-3, WT-5, WT-6) of the six locations identified in the Study Plan. The installation of WT-1 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 10 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company WT-2 and WT-4 were delayed due to high flows creating unsafe access conditions to the low-flow channel. Monthly statistics for each station are included in Table 2. Additional details can be found in Appendix C1. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 11 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table 2. Summary of 2023 continuous water temperature monitoring in the Poe Project. Water Temperature (°C) Daily Statistic1 Data Station Month Maximum Minimum Mean Range2 Days WT-1 April -- -- -- -- -- May -- -- -- -- -- June 18.1 13.3 15.1 0.9 30 July 19.8 17.9 18.9 1.2 31 August 20.3 18.4 19.1 1.1 31 September 19.1 16.2 18.1 1.0 30 October 16.1 9.2 14.1 0.6 31 Period Statistics 20.3 9.2 17.1 1.0 WT-2 April -- -- -- -- -- May -- -- -- -- -- June -- -- -- -- -- July 18.9 18.6 18.7 1.1 5 August 20.4 18.4 19.2 1.1 31 September 19.1 16.2 18.1 1.2 30 October 16.1 9.3 14.2 0.6 31 Period Statistics 20.4 9.3 17.3 1.0 WT-3 April 11.2 6.0 8.7 0.8 30 May 13.3 9.1 11.6 1.2 31 June 18.1 13.4 15.1 1.0 30 July 19.8 18.0 19.0 1.5 31 August 20.5 18.5 19.2 1.6 31 September 19.1 16.1 18.0 1.9 30 October 16.1 9.3 14.2 1.1 31 Period Statistics 20.5 6.0 15.1 1.3 WT-4 April -- -- -- -- -- May -- -- -- -- -- June 18.7 13.8 15.5 1.3 30 July 20.0 18.4 19.1 2.3 20 August 20.9 18.7 19.6 2.3 31 September 19.4 16.1 18.2 2.1 30 October 16.5 9.4 14.3 1.6 31 Period Statistics 20.9 9.4 17.2 1.9 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 #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 12 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table 2. Continued. Water Temperature (°C) Daily Average1 Data Station Month Maximum Minimum Mean Range2 Days WT-5 April 11.6 6.5 9.2 1.1 30 May 14.0 9.4 12.1 1.1 31 June 19.2 14.1 15.9 2.1 30 July 20.9 19.0 19.9 2.9 31 August 21.8 19.1 20.3 2.3 31 September 20.6 16.3 19.0 2.0 30 October 17.1 10.0 14.7 1.4 31 Period Statistics 21.8 6.5 15.9 1.8 WT-6 April -- -- -- -- -- May -- -- -- -- -- June -- -- -- -- -- July -- -- -- -- -- August -- -- -- -- -- September 19.0 16.3 18.0 0.7 20 October 16.6 9.8 14.5 0.6 31 Period Statistics 19.0 9.8 15.9 0.7 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 #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 13 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.3.1 Station WT-1 Station WT-1 was located approximately 0.16 miles downstream of Poe Dam. This station represents conditions in the upstream end of the Poe Reach. Mean daily water temperatures at WT-1 for the period June 1 through October 31 ranged from 9.2 to 20.3C (Table 2). The maximum hourly average temperature (21.0C) occurred on August 18, 2023 (Appendix C1). The thermal regime at this station is the result of releases from Poe Reservoir. As a result, the diel range in temperatures is small, with an average diel fluctuation of 1.0°C (Table 2). Figure 3 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-1. Figure 3. Daily maximum, minimum, and mean water temperatures NFFR below Poe Dam (Station WT-1) – 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2022 Poe Water Temperature 14 March 2023 Poe Project, FERC No. 2107 © 2023, Pacific Gas and Electric Company 3.3.2 Station WT-2 Station WT-2 is located approximately 0.5 miles downstream of the Poe Dam, and approximately 300 ft upstream of the confluence with Mill Creek. This station represents conditions near a foothill yellow-legged frog (FYLF) breeding site. Mean daily water temperatures at WT-2 for the period July 26 through October 31 ranged from 9.3 to 20.4C (Table 2). The maximum hourly average temperature (21.0C) occurred on August 18, 2023 (Appendix C1). The thermal regime at this location is a function of the short distance downstream from Poe Dam and upstream of any inflow from major tributaries. As a result, the diel range in temperatures is similar to WT-1, with an average diel fluctuation of 1.0°C (Table 2). Figure 4 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-2. Figure 4. Daily maximum, minimum, and average water temperatures NFFR above Mill Creek (Station WT-2) – 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 15 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.3.3 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, 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 9.1 to 20.5C (Table 2). The maximum hourly average temperature (21.4C) occurred on August 19, 2023 (Appendix C1). This station is downstream of all inflow from the two major tributaries, and some distance downstream of the dam. As a result, the diel range in temperatures is larger than WT-1, with an average diel fluctuation of 1.4°C (Table 2). Figure 5 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-3. Figure 5. Daily maximum, minimum, and average water temperatures NFFR at Pulga Bridge (Station WT-3) – 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 16 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.3.4 Station WT-4 Station WT-4 is located approximately 3.5 miles downstream of the Poe Dam, near Bardees Bar. This station represents conditions in the middle of the Poe Reach. Mean daily water temperatures at WT-4 for the period June 1 through October 31 ranged from 9.4 to 20.9C (Table 2). The maximum hourly average temperature (22.3C) occurred on August 18, 2023 (Appendix C1). This station is located at the end of the high-gradient river segment and the beginning of the open canyon topography characteristic of the mid and lower end of the Poe Reach. As a result, the diel range in temperatures is larger than WT-3, with average diel fluctuation of 1.9°C (Table 2). The recorder was out of the water for approximately 11 days during the period July 15 to July 25 due to receding flows. Figure 6 presents daily maximum, minimum, and mean hourly average water temperatures from Station WT-4. Figure 6. Daily maximum, minimum, and average water temperatures NFFR at Bardees Bar (Station WT-4) – 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 17 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.3.5 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 9.4 to 21.8C (Table 2). The maximum hourly average temperature (22.9C) occurred on August 18, 2023 (Appendix C1). This location represents the longest travel distance between stations. The diel range at this station is similar (±0.1°C) to WT-4, with an average diel fluctuation of 1.9°C (Table 2). Figure 7 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-5. Figure 7. Daily maximum, minimum, and average water temperatures NFFR above Poe Powerhouse (Station WT-5) – 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 18 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.3.6 Station WT-6 Station WT-6 was 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 September 11 through October 31 ranged from 9.8 to 19.0C (Table 2). The maximum hourly average temperature (19.4C) occurred on September 16, 2023 (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 0.6°C (Table 2). Figure 8 presents daily maximum, minimum, and mean hourly average water temperature from Station WT-6. Figure 8. Daily maximum, minimum, and average water temperatures NFFR below Poe Powerhouse (Station WT-6) – 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 19 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.4 COMPARISON OF WATER TEMPERATURES IN POE PROJECT The mean daily water temperatures from each station monitored in 2023 are compared in Figure 9 along with mean daily air temperature measured at the Poe Powerhouse. The figure illustrates the similar temperature response in the upper and middle segments of the Poe Project (WT-1 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. Mean daily water temperatures at Station WT-3 (end of upper Poe Reach) ranged from “no measurable” difference to 0.2°C warmer than those observed at WT-1 (initial condition). These values are within the instrument accuracy. The data suggests that water temperatures at any of the first three stations (WT-1, WT-2, WT-3) are essentially the same with no measurable effect from the tributaries. Mean daily water temperatures at Station WT-4 (midway through Poe Reach) ranged from 0.2°C cooler to 0.8°C warmer than those observed at WT-1. This small differential indicates there is minimal change at the midway point through the reach, indicative of travel time less than a complete diel cycle. Mean daily temperatures at the terminal station in the Poe Reach (WT-5), exhibited values that trend with the other stations, but were warmer than the upstream reaches for the June through August period . Mean daily water temperatures at WT-5 ranged from 0.2°C to 1.9°C warmer than those observed at WT-1. 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 for the June-August period were not available in 2023 due to invalid data. Data for the September through October period were similar in value and range to those observed in the upper reaches of the project. This is to be expected as the immediate source of flows for both WT-1 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 -0.1°C to 0.6°C warmer than those observed at WT-1 (initial condition). Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 20 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Figure 9. Comparison of daily average water temperature from the Poe Project of the NFFR with mean daily air temperatures from Poe Powerhouse - 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 21 June 2024 Poe Project, FERC No. 2107 © 2024, 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 2023 monitoring period for each station are presented in Table 3. The annual MWAT value for the initial condition (WT-1: below Poe Dam) in 2023 was 19.9°C. For the terminal condition in the Poe Reach (WT-5: upstream of Poe Powerhouse), the MWAT in 2023 was 21.4°C. Figure 10 compares the running seven-day average water temperature for each station during the 2023 monitoring period. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 22 June 2024 Poe Project, FERC No. 2107 © 2024, 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 2023. Station Month MWAT Station Month MWAT WT-1 April -- WT-2 April -- May -- May -- June 16.6 June -- July 19.4 July August 19.9 August 20.0 September 18.9 September 18.9 October 16.6 October 16.7 MWAT 19.9 MWAT 20.0 WT-3 April 10.7 WT-4 April -- May 12.9 May -- June 16.6 June 17.1 July 19.5 July 19.8 August 20.1 August 20.5 September 18.9 September 19.2 October 16.6 October 16.7 MWAT 20.1 MWAT 20.5 WT-5 April 11.1 WT-6 April -- May 13.6 May -- June 17.5 June -- July 20.4 July -- August 21.4 August -- September 20.2 September 18.8 October 17.0 October 16.7 MWAT 21.4 MWAT 18.8 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 23 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Figure 10. Weekly (7-Day) running average water temperature at each station monitored in 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 24 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 3.6 2023 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 2023 monitoring period, which was from April through October, are summarized in Table 4. In-stream flows at Gage NF-23 during the 2023 monitoring period ranged from 77 to 10,566 cfs. Average flow for the monitoring period was 2069 cfs. The minimum value of 77 cfs occurred during a FERC approved flow reduction to facilitate fishery studies in the bypass reach. Figure 11 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 2023 monitoring period (April through October) are summarized in Table 4. Average daily discharge through the powerhouse for the 2023 monitoring period was 2201 cfs and ranged from 424 to 3891 cfs (Figure 11). A complete listing of hydrologic data used in this section is contained in Appendix D. 3.7 2023 METEOROLOGY Project-specific meteorology from the Poe Powerhouse station for the 2023 monitoring period are included in Table E-1 (Appendix E). The peak mean daily air temperature for the period, which was 30.1°C, was recorded on August 17, 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 25 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table 4. Summary of Poe Project flow during the 2023 monitoring period. Daily Average Data Station Description Month Maximum Minimum Mean Station NF-23 Flow (cfs) April 10566 1270 6139 (Release to Poe Reach) May 10016 3027 5205 June 2890 892 1659 July 807 545 633 August 581 185 364 September 475 77 239 October 337 282 302 Poe Powerhouse Flow (cfs) April 3891 3666 3872 May 3889 2302 3696 June 3844 1244 2564 July 2410 1137 1917 August 2257 1425 1858 September 2902 2051 2486 October 2322 424 725 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 26 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Figure 11. Daily average stream flow in the Poe Project area - 2023. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature 27 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 4.0 REFERENCES CDEC. 2023. 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. 2023. Hydrological database provided by PG&E Hydro Generation Department, Pacific Gas and Electric Company. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX A – MONITORING PLAN 2023 Poe Water Temperature June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company APPENDIX A WATER TEMPERATURE MONITORING PLAN Document Accession #: 20240628-5155 Filed Date: 06/28/2024 2023 Poe Water Temperature A-1 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 2 2023 Poe Water Temperature A-2 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 3 2023 Poe Water Temperature A-3 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 4 2023 Poe Water Temperature A-4 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 5 2023 Poe Water Temperature A-5 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 6 2023 Poe Water Temperature A-6 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 7 2023 Poe Water Temperature A-7 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 assure that the sensor stays submerged and is not exposed to direct sunlight. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 8 2023 Poe Water Temperature A-8 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 9 2023 Poe Water Temperature A-9 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 10 2023 Poe Water Temperature A-10 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 11 2023 Poe Water Temperature A-11 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company 6.3 AFTER NEW CANYON DAM RELEASES ARE IMPLEMENTED No later than 12 years following implementation of the new Canyon Dam flow releases (in FERC No. 2105 License), the Licensee shall provide a report on water temperature data and the outcome of the consultation to the Deputy Director that includes: (i) a recommendation regarding whether a change to instream flows is appropriate; (ii) the proposed instream flows, if such changes are recommended; (iii) comments and recommendations made in connection with the consultation; and (iv) a description of how the Licensee's recommendation incorporates or address agency comments and recommendations. Per, FERC License Article 401 (d), if the report prescribes any modifications to flows then the Licensee an amendment request will be submitted to FERC with consultation documentation from Agency Representatives and approval from the SWRCB Deputy Director. 7.0 LITERATURE CITED Federal Energy Regulatory Commission (FERC). 2018. Order Issuing New License. Project No. 2107-016. Prepared by Federal Energy Regulatory Commission, Office of Energy Projects, Division of Hydropower Licensing. Washington, DC. December 17, 2018. Pacific Gas and Electric Company (PG&E). 2003. Poe Hydroelectric Project, FERC No. 2107, Application for New License (Volume 1 of 4). December 2003. State Water Recourses Control Board (SWRCB). 2017. Pacific Gas and Electric Company Poe Hydroelectric Project. Federal Energy Regulatory Commission Project No. 2107. Water Quality Certification. December 28, 2017. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 12 2023 Poe Water Temperature A-12 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company ATTACHMENT 1 FERC Article 401 – Commission Approval, Reporting, Notification, and Filing of Amendments (FERC 2018) (a) Requirement to File Plans for Commission Approval The State Water Resources Control Board’s (Water Board) section 401 water quality certification (WQC) (Appendix A) and the U. S. Department of Agriculture – Forest Service’s (Forest Service) section 4(e) conditions (Appendix B) require the licensee to prepare plans in consultation with other entities for approval by the Water Board or Forest Service or for submittal to the Commission, and implement specific measures without prior Commission approval. The following plans must also be submitted to the Commission for approval by the deadlines specified below: Water Board WQC Condition No. Forest Service 4(e) Condition No. Plan Name Commission Due Date 10 - Temperature monitoring plan Within 6 months from license issuance *excerpt from FERC 2018 Article 401 With each plan filed with the Commission, the licensee must include documentation that it developed the plan in consultation with the above-listed agencies and provide copies of any comments received, as well as its response to each comment. The Commission reserves the right to make changes to any plan filed. Upon Commission approval, the plan becomes a requirement of the license, and the licensee must implement the plan, including any changes required by the Commission. Any changes in the above schedule or plans require approval by the Commission before implementing the proposed change. (b) Requirements to File Reports. Certain conditions of the Water Board WQC in Appendix A and the Forest Service’s section 4(e) conditions in Appendix B require the licensee to file reports with other entities. Because these reports relate to compliance with the requirements of this license, each such report must also be submitted to the Commission. These reports are listed in the following table: Document Accession #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 13 2023 Poe Water Temperature A-13 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 Poe Hydroelectric Project, FERC Project No. 2107 Water Temperature Monitoring Plan Page 14 2023 Poe Water Temperature A-14 June 2024 Poe Hydroelectric Project, FERC No. 2107 © 2024, 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 #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX B – METHODOLOGY 2023 Poe Water Temperature June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company APPENDIX B METHODOLOGY Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX B – METHODOLOGY 2023 Poe Water Temperature B-1 June 2024 Poe Project, FERC No. 2107 © 2024, 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 06/01/23 WT-1 T3063 Starmon L0250 Starmon None 07/26/23 WT-2 T3610 Starmon -- -- None 03/30/23 WT-3 T6573 Starmon 356103 Vemco None 06/01/23 WT-4 T3048 Starmon 2524 Starmon None 02/23/23 WT-5 T6580 Starmon 2309 Starmon None 02/23/23 WT-6 T6588 Starmon 3080 Starmon None Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company APPENDIX C WATER TEMPERATURE Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-1 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table C-1. Daily Summary of Hourly Average Water Temperature Water Temperature (°C) NFFR below Poe Dam (WT-1) NFFR above Mill Creek (WT-2) NFFR at NF-23/Pulga (WT-3) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 04/01/23 -- -- -- -- -- -- 6.6 6.8 6.5 04/02/23 -- -- -- -- -- -- 7.0 7.2 6.8 04/03/23 -- -- -- -- -- -- 6.7 7.2 6.3 04/04/23 -- -- -- -- -- -- 6.0 6.4 5.7 04/05/23 -- -- -- -- -- -- 6.1 6.5 5.8 04/06/23 -- -- -- -- -- -- 6.9 7.3 6.4 04/07/23 -- -- -- -- -- -- 7.5 7.7 7.2 04/08/23 -- -- -- -- -- -- 7.7 8.2 7.5 04/09/23 -- -- -- -- -- -- 8.4 8.8 8.0 04/10/23 -- -- -- -- -- -- 9.3 10.0 8.8 04/11/23 -- -- -- -- -- -- 9.6 10.0 9.1 04/12/23 -- -- -- -- -- -- 8.7 9.6 8.3 04/13/23 -- -- -- -- -- -- 8.0 8.4 7.6 04/14/23 -- -- -- -- -- -- 8.2 8.6 8.0 04/15/23 -- -- -- -- -- -- 8.7 9.3 8.4 04/16/23 -- -- -- -- -- -- 9.1 9.4 8.7 04/17/23 -- -- -- -- -- -- 8.9 9.3 8.6 04/18/23 -- -- -- -- -- -- 8.0 8.6 7.8 04/19/23 -- -- -- -- -- -- 7.7 8.0 7.3 04/20/23 -- -- -- -- -- -- 8.1 8.9 7.6 04/21/23 -- -- -- -- -- -- 9.3 10.1 8.7 04/22/23 -- -- -- -- -- -- 10.1 10.7 9.6 04/23/23 -- -- -- -- -- -- 10.5 11.0 9.9 04/24/23 -- -- -- -- -- -- 10.3 10.7 9.9 04/25/23 -- -- -- -- -- -- 10.2 10.5 9.8 04/26/23 -- -- -- -- -- -- 10.4 10.9 9.9 04/27/23 -- -- -- -- -- -- 10.8 11.4 10.3 04/28/23 -- -- -- -- -- -- 11.1 11.6 10.6 04/29/23 -- -- -- -- -- -- 11.2 11.6 10.8 04/30/23 -- -- -- -- -- -- 11.1 11.3 10.8 05/01/23 -- -- -- -- -- -- 10.5 11.0 10.4 05/02/23 -- -- -- -- -- -- 10.2 10.4 9.9 05/03/23 -- -- -- -- -- -- 9.8 10.1 9.4 05/04/23 -- -- -- -- -- -- 9.9 10.0 9.7 05/05/23 -- -- -- -- -- -- 9.6 9.7 9.5 05/06/23 -- -- -- -- -- -- 9.1 9.4 8.8 05/07/23 -- -- -- -- -- -- 9.1 9.3 8.9 05/08/23 -- -- -- -- -- -- 9.2 9.3 9.1 05/09/23 -- -- -- -- -- -- 9.3 10.0 8.9 05/10/23 -- -- -- -- -- -- 10.3 11.1 9.9 05/11/23 -- -- -- -- -- -- 10.9 11.7 10.4 05/12/23 -- -- -- -- -- -- 11.6 12.6 11.1 05/13/23 -- -- -- -- -- -- 12.2 13.0 11.4 05/14/23 -- -- -- -- -- -- 12.2 13.0 11.4 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-2 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR below Poe Dam (WT-1) NFFR above Mill Creek (WT-2) NFFR at NF-23/Pulga (WT-3) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 05/15/23 -- -- -- -- -- -- 12.3 13.1 11.6 05/16/23 -- -- -- -- -- -- 11.8 12.6 10.9 05/17/23 -- -- -- -- -- -- 11.8 12.8 10.9 05/18/23 -- -- -- -- -- -- 12.1 13.1 11.2 05/19/23 -- -- -- -- -- -- 12.4 13.6 11.4 05/20/23 -- -- -- -- -- -- 12.7 13.8 11.7 05/21/23 -- -- -- -- -- -- 12.7 13.6 11.8 05/22/23 -- -- -- -- -- -- 12.8 13.5 12.0 05/23/23 -- -- -- -- -- -- 12.8 13.5 12.1 05/24/23 -- -- -- -- -- -- 12.7 13.4 12.1 05/25/23 -- -- -- -- -- -- 12.6 13.1 12.2 05/26/23 -- -- -- -- -- -- 12.6 13.4 12.2 05/27/23 -- -- -- -- -- -- 13.1 13.7 12.7 05/28/23 -- -- -- -- -- -- 13.0 13.7 12.7 05/29/23 -- -- -- -- -- -- 12.8 13.3 12.5 05/30/23 -- -- -- -- -- -- 13.0 13.4 12.7 05/31/23 -- -- -- -- -- -- 13.3 13.8 13.0 06/01/23 13.3 13.8 13.0 -- -- -- 13.4 13.9 13.1 06/02/23 13.4 14.0 13.0 -- -- -- 13.5 14.0 13.2 06/03/23 13.8 14.4 13.4 -- -- -- 13.9 14.3 13.5 06/04/23 14.2 14.9 13.8 -- -- -- 14.3 14.7 13.9 06/05/23 14.3 15.1 14.0 -- -- -- 14.4 15.1 14.0 06/06/23 14.2 14.5 14.0 -- -- -- 14.3 14.5 14.0 06/07/23 13.8 14.4 13.3 -- -- -- 13.8 14.3 13.4 06/08/23 14.2 14.4 14.0 -- -- -- 14.2 14.4 14.0 06/09/23 14.7 15.0 14.3 -- -- -- 14.7 15.2 14.2 06/10/23 14.7 15.1 14.2 -- -- -- 14.7 15.1 14.2 06/11/23 14.4 14.7 14.2 -- -- -- 14.5 14.9 14.2 06/12/23 14.6 15.0 14.3 -- -- -- 14.7 15.0 14.3 06/13/23 14.8 15.0 14.5 -- -- -- 14.8 15.3 14.4 06/14/23 15.3 15.7 14.8 -- -- -- 15.3 15.9 14.8 06/15/23 15.7 16.1 15.2 -- -- -- 15.8 16.3 15.3 06/16/23 15.7 16.3 15.2 -- -- -- 15.8 16.5 15.1 06/17/23 15.8 16.5 15.3 -- -- -- 15.9 16.6 15.3 06/18/23 16.1 16.7 15.7 -- -- -- 16.2 16.8 15.7 06/19/23 15.7 16.0 15.2 -- -- -- 15.8 16.1 15.3 06/20/23 14.5 15.0 14.1 -- -- -- 14.6 15.1 14.2 06/21/23 14.2 14.8 13.8 -- -- -- 14.3 14.9 13.7 06/22/23 14.3 14.7 14.0 -- -- -- 14.3 14.8 13.9 06/23/23 14.6 15.2 14.2 -- -- -- 14.6 15.1 14.1 06/24/23 15.1 15.8 14.5 -- -- -- 15.1 15.7 14.4 06/25/23 15.8 16.6 15.2 -- -- -- 15.8 16.5 15.1 06/26/23 16.4 17.0 16.0 -- -- -- 16.4 17.0 15.9 06/27/23 16.5 16.9 16.3 -- -- -- 16.6 16.8 16.3 06/28/23 16.7 17.7 16.1 -- -- -- 16.8 17.6 16.0 06/29/23 17.4 18.1 16.9 -- -- -- 17.5 18.0 16.8 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-3 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR below Poe Dam (WT-1) NFFR above Mill Creek (WT-2) NFFR at NF-23/Pulga (WT-3) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 06/30/23 18.1 19.1 17.4 -- -- -- 18.1 18.9 17.3 07/01/23 18.9 19.7 18.3 -- -- -- 18.9 19.5 18.1 07/02/23 19.4 20.1 18.8 -- -- -- 19.4 19.9 18.7 07/03/23 19.6 20.1 19.2 -- -- -- 19.7 20.1 19.0 07/04/23 19.6 20.1 19.2 -- -- -- 19.7 20.0 19.0 07/05/23 19.8 20.3 19.3 -- -- -- 19.8 20.2 19.2 07/06/23 19.7 20.3 19.3 -- -- -- 19.8 20.3 19.2 07/07/23 19.1 19.6 18.6 -- -- -- 19.2 19.9 18.7 07/08/23 18.5 19.4 18.0 -- -- -- 18.7 19.7 17.9 07/09/23 18.4 19.2 17.9 -- -- -- 18.5 19.5 17.8 07/10/23 18.1 18.8 17.5 -- -- -- 18.2 19.2 17.3 07/11/23 17.9 18.8 17.1 -- -- -- 18.0 19.1 17.0 07/12/23 18.2 18.9 17.6 -- -- -- 18.2 19.3 17.4 07/13/23 18.0 18.7 17.5 -- -- -- 18.1 19.1 17.4 07/14/23 18.0 18.8 17.4 -- -- -- 18.2 19.3 17.3 07/15/23 18.7 19.6 17.9 -- -- -- 18.8 20.1 17.8 07/16/23 19.3 19.9 18.7 -- -- -- 19.4 20.3 18.6 07/17/23 19.4 20.1 19.0 -- -- -- 19.6 20.4 18.9 07/18/23 19.5 20.3 19.1 -- -- -- 19.7 20.4 19.0 07/19/23 19.2 19.8 18.9 -- -- -- 19.4 20.2 18.8 07/20/23 18.9 19.8 18.4 -- -- -- 19.0 20.0 18.3 07/21/23 19.0 19.9 18.4 -- -- -- 19.1 20.0 18.3 07/22/23 19.0 19.8 18.5 -- -- -- 19.1 20.0 18.4 07/23/23 19.1 19.9 18.7 -- -- -- 19.3 20.0 18.6 07/24/23 19.0 19.6 18.4 -- -- -- 19.1 19.8 18.5 07/25/23 18.8 19.6 18.3 -- -- -- 18.9 19.7 18.1 07/26/23 18.5 19.3 17.9 -- -- -- 18.6 19.4 17.7 07/27/23 18.6 19.5 18.2 18.7 19.5 18.2 18.7 19.3 18.0 07/28/23 18.8 19.4 18.5 18.9 19.4 18.5 18.9 19.4 18.3 07/29/23 18.7 19.4 18.3 18.7 19.4 18.3 18.8 19.4 18.2 07/30/23 18.7 19.4 18.2 18.7 19.4 18.2 18.8 19.5 18.1 07/31/23 18.6 19.2 18.1 18.6 19.2 18.1 18.6 19.3 18.0 08/01/23 18.4 19.1 17.9 18.4 19.1 17.9 18.5 19.1 17.8 08/02/23 18.4 19.2 17.9 18.5 19.2 17.9 18.5 19.2 17.7 08/03/23 18.5 19.2 18.0 18.5 19.2 18.0 18.5 19.2 17.9 08/04/23 18.6 19.3 18.1 18.6 19.3 18.1 18.7 19.3 18.0 08/05/23 18.7 19.7 18.2 18.8 19.6 18.2 18.8 19.5 18.1 08/06/23 19.2 19.9 18.8 19.3 19.9 18.8 19.3 20.0 18.7 08/07/23 19.3 20.1 18.8 19.4 20.1 18.8 19.4 20.2 18.6 08/08/23 19.2 19.9 18.8 19.3 19.9 18.8 19.3 19.8 18.7 08/09/23 19.0 19.6 18.6 19.1 19.6 18.6 19.1 19.7 18.5 08/10/23 18.9 19.5 18.5 18.9 19.5 18.5 19.0 19.6 18.3 08/11/23 18.7 19.4 18.3 18.7 19.4 18.2 18.8 19.3 18.1 08/12/23 19.1 19.8 18.6 19.1 19.8 18.6 19.2 19.9 18.5 08/13/23 19.6 20.4 19.1 19.6 20.4 19.1 19.7 20.5 18.9 08/14/23 19.8 20.3 19.4 19.8 20.3 19.4 19.8 20.4 19.2 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-4 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR below Poe Dam (WT-1) NFFR above Mill Creek (WT-2) NFFR at NF-23/Pulga (WT-3) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 08/15/23 19.8 20.2 19.4 19.8 20.3 19.4 19.9 20.7 19.3 08/16/23 19.6 20.3 19.1 19.6 20.3 19.1 19.8 20.5 19.0 08/17/23 20.0 20.8 19.5 20.1 20.8 19.5 20.2 21.1 19.4 08/18/23 20.3 21.0 19.9 20.4 21.0 20.0 20.5 21.2 19.8 08/19/23 20.3 20.9 19.8 20.3 20.9 19.8 20.4 21.4 19.5 08/20/23 19.8 20.7 19.6 19.9 20.8 19.6 19.9 20.7 19.5 08/21/23 19.3 19.9 19.0 19.3 19.9 19.0 19.3 19.8 19.0 08/22/23 18.8 19.1 18.6 18.9 19.2 18.6 18.9 19.5 18.5 08/23/23 18.8 19.4 18.3 18.9 19.5 18.3 19.0 20.2 18.1 08/24/23 18.9 19.8 18.4 19.0 19.6 18.3 19.1 20.2 18.1 08/25/23 19.2 19.7 18.6 19.3 19.8 18.6 19.4 20.6 18.4 08/26/23 19.1 19.6 18.7 19.1 19.5 18.7 19.2 20.4 18.4 08/27/23 19.2 19.6 18.7 19.2 19.9 18.6 19.3 20.7 18.2 08/28/23 18.9 19.3 18.5 18.9 19.3 18.5 18.9 20.3 18.0 08/29/23 18.7 19.3 18.1 18.7 19.3 18.0 18.7 20.2 17.7 08/30/23 18.6 19.0 18.1 18.6 19.2 18.0 18.7 20.0 17.7 08/31/23 18.5 19.2 17.9 18.6 19.2 17.9 18.6 19.8 17.6 09/01/23 18.8 19.2 18.5 18.8 19.2 18.5 18.7 19.1 18.2 09/02/23 18.4 18.7 18.2 18.4 18.8 18.2 18.3 18.7 18.0 09/03/23 17.7 18.1 17.4 17.8 18.2 17.5 17.8 18.5 17.4 09/04/23 17.7 18.3 17.2 17.8 18.6 17.1 17.8 19.3 16.8 09/05/23 18.1 18.9 17.5 18.2 19.1 17.4 18.2 19.7 17.1 09/06/23 18.4 19.2 17.9 18.5 19.4 17.8 18.5 19.9 17.5 09/07/23 18.5 19.2 18.0 18.6 19.4 18.0 18.6 19.9 17.6 09/08/23 18.5 19.1 18.0 18.5 19.2 17.9 18.5 19.8 17.5 09/09/23 18.5 19.1 18.0 18.5 19.3 17.9 18.5 19.9 17.6 09/10/23 18.5 19.1 18.0 18.5 19.2 17.9 18.5 19.8 17.5 09/11/23 18.4 19.1 17.9 18.4 19.4 17.9 18.5 20.0 17.5 09/12/23 18.3 19.0 17.8 18.3 19.3 17.7 18.2 19.9 17.2 09/13/23 18.4 19.1 17.8 18.4 19.4 17.7 18.4 20.0 17.3 09/14/23 18.6 19.4 18.0 18.7 19.7 17.9 18.6 20.2 17.6 09/15/23 18.8 19.4 18.2 18.8 19.7 18.1 18.8 20.3 17.7 09/16/23 18.8 19.5 18.3 18.9 19.8 18.2 18.9 20.3 17.9 09/17/23 18.9 19.4 18.6 18.9 19.7 18.5 19.0 20.3 18.1 09/18/23 19.1 19.9 18.6 19.1 20.3 18.5 19.1 20.5 18.0 09/19/23 19.0 19.8 18.4 19.0 20.2 18.3 19.0 20.3 17.9 09/20/23 18.9 19.6 18.4 18.9 20.0 18.2 18.9 20.2 17.8 09/21/23 18.3 18.8 17.6 18.3 19.2 17.4 18.0 19.1 16.8 09/22/23 17.5 17.9 17.1 17.5 17.9 16.9 17.2 18.3 16.3 09/23/23 17.4 18.0 17.1 17.5 18.1 17.0 17.4 18.3 16.8 09/24/23 17.3 17.5 17.2 17.4 17.6 17.2 17.3 17.7 17.0 09/25/23 17.1 17.4 16.9 17.2 17.5 16.9 17.1 17.8 16.7 09/26/23 17.1 17.5 16.9 17.2 17.6 16.9 17.2 17.9 16.8 09/27/23 16.8 17.2 16.5 16.8 17.3 16.5 16.8 17.6 16.3 09/28/23 16.8 17.2 16.4 16.8 17.3 16.4 16.7 17.6 16.2 09/29/23 16.6 16.8 16.4 16.7 16.9 16.4 16.6 17.1 16.2 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-5 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR below Poe Dam (WT-1) NFFR above Mill Creek (WT-2) NFFR at NF-23/Pulga (WT-3) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 09/30/23 16.2 16.4 16.0 16.2 16.4 16.0 16.1 16.3 15.8 10/01/23 15.9 16.2 15.6 15.9 16.2 15.6 15.8 16.5 15.4 10/02/23 15.6 16.0 15.2 15.6 16.0 15.2 15.6 16.3 15.0 10/03/23 15.5 15.8 15.2 15.5 15.8 15.2 15.6 16.2 15.1 10/04/23 15.8 16.3 15.5 15.8 16.5 15.5 15.8 16.8 15.3 10/05/23 16.0 16.5 15.8 16.0 16.6 15.8 16.0 17.0 15.6 10/06/23 16.1 16.6 15.8 16.1 16.8 15.8 16.1 17.2 15.6 10/07/23 16.1 16.5 15.8 16.1 16.6 15.8 16.1 17.1 15.6 10/08/23 15.9 16.2 15.7 15.9 16.3 15.7 15.9 16.8 15.5 10/09/23 15.6 15.9 15.5 15.7 15.9 15.5 15.6 15.9 15.4 10/10/23 15.5 15.6 15.3 15.5 15.6 15.3 15.5 15.7 15.2 10/11/23 15.1 15.3 14.9 15.2 15.5 14.9 15.1 15.8 14.7 10/12/23 14.6 15.0 14.2 14.7 15.0 14.2 14.6 15.3 14.0 10/13/23 14.1 14.3 13.8 14.2 14.3 13.8 14.1 14.6 13.8 10/14/23 13.8 14.0 13.7 13.8 14.1 13.7 13.8 14.5 13.6 10/15/23 13.7 13.9 13.5 13.7 14.1 13.6 13.8 14.5 13.4 10/16/23 13.7 13.9 13.4 13.7 13.9 13.4 13.7 14.3 13.4 10/17/23 13.5 13.8 13.5 13.6 14.0 13.4 13.6 14.4 13.2 10/18/23 13.8 14.3 13.5 13.9 14.5 13.5 13.9 14.9 13.3 10/19/23 14.1 14.5 13.9 14.2 14.7 13.9 14.2 15.0 13.8 10/20/23 14.2 14.5 14.1 14.3 14.7 14.1 14.3 15.1 13.9 10/21/23 14.3 14.4 14.1 14.3 14.6 14.1 14.3 15.1 14.0 10/22/23 14.4 14.5 14.3 14.4 14.6 14.3 14.4 15.0 14.1 10/23/23 14.4 14.7 14.3 14.4 14.8 14.3 14.4 15.1 14.2 10/24/23 14.3 14.6 14.2 14.4 14.8 14.2 14.3 15.1 14.0 10/25/23 14.1 14.3 13.8 14.2 14.3 13.9 14.1 14.2 13.8 10/26/23 13.6 13.8 13.4 13.6 13.9 13.4 13.5 14.0 13.2 10/27/23 13.0 13.4 12.5 13.0 13.3 12.5 12.9 13.4 12.3 10/28/23 11.9 12.4 11.2 12.0 12.5 11.3 11.9 12.3 11.3 10/29/23 10.8 11.1 10.4 10.8 11.2 10.5 10.7 11.2 10.3 10/30/23 9.8 10.3 9.5 9.9 10.4 9.5 9.9 10.3 9.5 10/31/23 9.2 9.5 8.9 9.3 9.6 9.0 9.3 9.7 9.1 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-6 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table C-1. Continued Water Temperature (°C) NFFR at Bardees Bar (WT-4) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 04/01/23 -- -- -- 7.3 7.4 7.1 -- -- -- 04/02/23 -- -- -- 7.5 8.1 7.0 -- -- -- 04/03/23 -- -- -- 6.9 7.6 6.2 -- -- -- 04/04/23 -- -- -- 6.5 7.6 6.0 -- -- -- 04/05/23 -- -- -- 7.0 8.0 6.1 -- -- -- 04/06/23 -- -- -- 7.8 8.4 6.9 -- -- -- 04/07/23 -- -- -- 8.0 8.1 7.8 -- -- -- 04/08/23 -- -- -- 8.5 8.9 7.9 -- -- -- 04/09/23 -- -- -- 9.2 9.9 8.4 -- -- -- 04/10/23 -- -- -- 10.1 10.3 9.2 -- -- -- 04/11/23 -- -- -- 9.8 10.4 8.7 -- -- -- 04/12/23 -- -- -- 8.8 9.2 8.0 -- -- -- 04/13/23 -- -- -- 8.3 8.4 8.0 -- -- -- 04/14/23 -- -- -- 8.7 8.8 8.3 -- -- -- 04/15/23 -- -- -- 9.3 9.6 8.7 -- -- -- 04/16/23 -- -- -- 9.5 9.8 9.0 -- -- -- 04/17/23 -- -- -- 8.9 9.4 8.2 -- -- -- 04/18/23 -- -- -- 8.1 8.6 7.5 -- -- -- 04/19/23 -- -- -- 8.1 8.6 7.6 -- -- -- 04/20/23 -- -- -- 8.9 9.2 7.9 -- -- -- 04/21/23 -- -- -- 10.1 10.4 9.1 -- -- -- 04/22/23 -- -- -- 10.7 11.1 10.1 -- -- -- 04/23/23 -- -- -- 10.9 11.4 10.2 -- -- -- 04/24/23 -- -- -- 10.6 11.1 10.0 -- -- -- 04/25/23 -- -- -- 10.6 11.0 10.1 -- -- -- 04/26/23 -- -- -- 10.9 11.2 10.3 -- -- -- 04/27/23 -- -- -- 11.3 11.8 10.7 -- -- -- 04/28/23 -- -- -- 11.6 12.0 11.0 -- -- -- 04/29/23 -- -- -- 11.6 12.0 11.0 -- -- -- 04/30/23 -- -- -- 11.4 11.8 10.7 -- -- -- 05/01/23 -- -- -- 10.7 10.8 10.5 -- -- -- 05/02/23 -- -- -- 10.3 10.8 9.7 -- -- -- 05/03/23 -- -- -- 10.2 10.4 9.8 -- -- -- 05/04/23 -- -- -- 10.1 10.3 9.9 -- -- -- 05/05/23 -- -- -- 9.8 10.1 9.3 -- -- -- 05/06/23 -- -- -- 9.4 9.7 9.2 -- -- -- 05/07/23 -- -- -- 9.7 10.0 9.3 -- -- -- 05/08/23 -- -- -- 9.5 9.8 9.2 -- -- -- 05/09/23 -- -- -- 10.0 10.2 9.3 -- -- -- 05/10/23 -- -- -- 11.0 11.4 10.2 -- -- -- 05/11/23 -- -- -- 11.6 12.0 10.9 -- -- -- 05/12/23 -- -- -- 12.4 12.8 11.7 -- -- -- Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-7 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR at Bardees Bar (WT-4) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 05/13/23 -- -- -- 12.7 13.3 12.0 -- -- -- 05/14/23 -- -- -- 12.7 13.3 12.0 -- -- -- 05/15/23 -- -- -- 12.7 13.4 11.5 -- -- -- 05/16/23 -- -- -- 12.3 12.9 11.5 -- -- -- 05/17/23 -- -- -- 12.4 13.0 11.5 -- -- -- 05/18/23 -- -- -- 12.7 13.4 11.7 -- -- -- 05/19/23 -- -- -- 13.1 13.8 12.0 -- -- -- 05/20/23 -- -- -- 13.3 14.1 12.4 -- -- -- 05/21/23 -- -- -- 13.3 13.9 12.4 -- -- -- 05/22/23 -- -- -- 13.3 13.8 12.7 -- -- -- 05/23/23 -- -- -- 13.4 13.8 12.7 -- -- -- 05/24/23 -- -- -- 13.2 13.6 12.8 -- -- -- 05/25/23 -- -- -- 13.1 13.5 12.7 -- -- -- 05/26/23 -- -- -- 13.4 13.8 12.8 -- -- -- 05/27/23 -- -- -- 13.8 14.2 13.3 -- -- -- 05/28/23 -- -- -- 13.5 14.1 13.0 -- -- -- 05/29/23 -- -- -- 13.6 14.3 13.2 -- -- -- 05/30/23 -- -- -- 13.8 14.3 13.2 -- -- -- 05/31/23 -- -- -- 14.0 14.7 13.6 -- -- -- 06/01/23 13.8 14.1 13.5 14.1 14.9 13.7 -- -- -- 06/02/23 13.8 14.2 13.5 14.2 14.9 13.7 -- -- -- 06/03/23 14.3 14.7 13.7 14.7 15.4 14.1 -- -- -- 06/04/23 14.8 15.2 14.1 15.2 15.9 14.5 -- -- -- 06/05/23 14.6 14.9 14.3 14.9 15.7 14.4 -- -- -- 06/06/23 14.4 15.0 13.8 14.8 15.7 14.2 -- -- -- 06/07/23 14.1 14.5 13.7 14.3 14.7 14.0 -- -- -- 06/08/23 14.6 14.8 14.3 14.9 15.6 14.4 -- -- -- 06/09/23 15.2 15.8 14.8 15.6 16.9 14.8 -- -- -- 06/10/23 14.9 15.7 14.4 15.3 16.8 14.4 -- -- -- 06/11/23 15.0 15.5 14.5 15.5 16.7 14.7 -- -- -- 06/12/23 14.9 15.4 14.5 15.3 16.3 14.7 -- -- -- 06/13/23 15.3 15.8 14.8 15.7 16.9 15.0 -- -- -- 06/14/23 15.8 16.3 15.2 16.2 17.1 15.3 -- -- -- 06/15/23 16.0 16.9 15.2 16.4 18.0 15.2 -- -- -- 06/16/23 16.1 17.0 15.4 16.6 18.0 15.4 -- -- -- 06/17/23 16.3 17.1 15.5 16.7 18.1 15.6 -- -- -- 06/18/23 16.4 17.2 15.7 16.8 18.2 15.6 -- -- -- 06/19/23 15.6 16.4 14.3 15.9 17.3 14.4 -- -- -- 06/20/23 14.6 15.3 13.7 15.0 16.4 13.6 -- -- -- 06/21/23 14.6 15.5 13.9 15.1 16.6 13.8 -- -- -- 06/22/23 14.7 15.3 14.1 15.0 16.1 14.0 -- -- -- 06/23/23 15.0 15.6 14.3 15.4 16.7 14.4 -- -- -- 06/24/23 15.6 16.1 14.6 16.0 17.1 14.7 -- -- -- Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-8 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR at Bardees Bar (WT-4) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 06/25/23 16.3 16.8 15.3 16.7 17.9 15.3 -- -- -- 06/26/23 16.9 17.4 16.0 17.3 18.6 16.0 -- -- -- 06/27/23 16.8 17.5 16.1 17.3 18.8 16.1 -- -- -- 06/28/23 17.4 18.1 16.2 17.9 19.2 16.2 -- -- -- 06/29/23 18.0 18.9 16.9 18.5 20.0 17.1 -- -- -- 06/30/23 18.7 19.4 17.4 19.2 20.6 17.8 -- -- -- 07/01/23 19.4 20.3 18.3 19.9 21.6 18.6 -- -- -- 07/02/23 19.8 20.7 18.7 20.3 21.9 19.0 -- -- -- 07/03/23 20.0 20.9 19.0 20.5 22.2 19.3 -- -- -- 07/04/23 20.0 20.8 19.0 20.5 22.1 19.3 -- -- -- 07/05/23 20.0 21.0 19.1 20.6 22.2 19.2 -- -- -- 07/06/23 19.9 20.9 18.8 20.4 22.2 18.9 -- -- -- 07/07/23 19.2 20.5 17.9 20.0 21.4 18.4 -- -- -- 07/08/23 18.9 20.2 17.8 19.6 21.0 18.2 -- -- -- 07/09/23 18.7 20.1 17.3 19.3 20.9 17.7 -- -- -- 07/10/23 18.4 19.8 17.1 19.0 20.5 17.6 -- -- -- 07/11/23 18.4 19.6 17.1 19.0 20.4 17.4 -- -- -- 07/12/23 18.5 19.9 17.3 19.1 20.6 17.6 -- -- -- 07/13/23 18.4 19.8 17.2 19.1 20.6 17.6 -- -- -- 07/14/23 19.1 20.1 17.3 19.5 20.8 17.6 -- -- -- 07/15/23 -- -- -- 20.2 21.5 18.5 -- -- -- 07/16/23 -- -- -- 20.6 22.0 18.8 -- -- -- 07/17/23 -- -- -- 20.9 22.3 19.5 -- -- -- 07/18/23 -- -- -- 20.7 22.2 19.3 -- -- -- 07/19/23 -- -- -- 20.4 21.9 18.8 -- -- -- 07/20/23 -- -- -- 20.1 21.5 18.5 -- -- -- 07/21/23 -- -- -- 20.3 21.7 18.7 -- -- -- 07/22/23 -- -- -- 20.2 21.4 19.0 -- -- -- 07/23/23 -- -- -- 20.2 21.5 19.1 -- -- -- 07/24/23 -- -- -- 19.9 21.4 18.5 -- -- -- 07/25/23 -- -- -- 19.7 21.1 18.2 -- -- -- 07/26/23 19.1 20.0 18.0 19.6 20.8 18.3 -- -- -- 07/27/23 19.1 20.0 18.0 19.7 21.0 18.3 -- -- -- 07/28/23 19.1 20.2 18.1 19.7 21.2 18.5 -- -- -- 07/29/23 19.0 20.0 18.0 19.5 21.0 18.3 -- -- -- 07/30/23 19.0 20.0 17.8 19.5 20.9 18.1 -- -- -- 07/31/23 18.8 19.9 17.7 19.4 20.9 18.1 -- -- -- 08/01/23 18.7 19.6 17.7 19.1 20.3 18.1 -- -- -- 08/02/23 18.8 19.8 17.7 19.3 20.6 18.1 -- -- -- 08/03/23 18.9 19.8 17.8 19.4 20.7 18.1 -- -- -- 08/04/23 19.0 20.0 18.0 19.6 20.9 18.3 -- -- -- 08/05/23 19.3 20.4 18.1 19.9 21.1 18.6 -- -- -- 08/06/23 19.7 20.8 18.6 20.2 21.6 19.0 -- -- -- Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-9 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR at Bardees Bar (WT-4) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 08/07/23 19.7 20.9 18.6 20.4 21.5 19.0 -- -- -- 08/08/23 19.6 20.7 18.5 20.2 21.4 19.1 -- -- -- 08/09/23 19.3 20.6 18.1 20.0 21.2 18.8 -- -- -- 08/10/23 19.2 20.5 18.0 19.8 21.0 18.6 -- -- -- 08/11/23 19.2 20.3 18.0 19.8 20.8 18.5 -- -- -- 08/12/23 19.7 20.9 18.5 20.4 21.5 18.8 -- -- -- 08/13/23 20.3 21.6 19.0 21.0 22.2 19.4 -- -- -- 08/14/23 20.1 21.0 19.3 20.6 21.3 19.7 -- -- -- 08/15/23 20.5 21.9 19.3 21.4 22.5 19.6 -- -- -- 08/16/23 20.4 21.6 19.2 21.5 22.5 20.2 -- -- -- 08/17/23 20.8 22.1 19.7 21.8 22.9 20.5 -- -- -- 08/18/23 20.9 22.3 19.7 21.8 22.9 20.5 -- -- -- 08/19/23 20.8 22.2 19.6 21.7 22.7 20.4 -- -- -- 08/20/23 20.0 20.4 19.7 20.6 21.1 20.0 -- -- -- 08/21/23 19.4 19.8 18.8 20.1 20.8 19.5 -- -- -- 08/22/23 19.2 20.3 18.3 20.1 21.1 19.2 -- -- -- 08/23/23 19.5 20.9 18.2 20.3 21.6 19.0 -- -- -- 08/24/23 19.6 20.9 18.2 20.6 21.8 19.5 -- -- -- 08/25/23 19.7 21.2 18.4 20.8 22.1 19.7 -- -- -- 08/26/23 19.4 20.9 18.2 20.3 21.6 19.4 -- -- -- 08/27/23 19.4 20.9 17.9 20.0 21.2 19.0 -- -- -- 08/28/23 19.1 20.8 17.8 20.0 21.3 19.2 -- -- -- 08/29/23 18.9 20.3 17.5 19.8 20.9 18.8 -- -- -- 08/30/23 18.9 20.2 17.7 19.7 20.8 18.7 -- -- -- 08/31/23 19.0 19.9 17.6 19.8 20.8 18.8 -- -- -- 09/01/23 18.7 19.2 18.2 19.3 20.0 18.4 -- -- -- 09/02/23 18.4 18.7 17.8 18.7 19.0 18.4 -- -- -- 09/03/23 18.1 19.1 16.9 19.1 20.0 18.4 -- -- -- 09/04/23 18.3 19.3 16.8 19.2 20.4 18.3 -- -- -- 09/05/23 18.7 19.7 17.3 19.6 20.8 18.3 -- -- -- 09/06/23 18.8 19.9 17.6 19.8 21.1 18.6 -- -- -- 09/07/23 18.8 20.0 17.6 19.8 21.0 18.7 -- -- -- 09/08/23 18.8 19.9 17.6 19.7 21.0 18.7 -- -- -- 09/09/23 18.8 20.0 17.6 19.7 21.0 18.6 -- -- -- 09/10/23 18.7 20.0 17.5 19.6 20.9 18.5 -- -- -- 09/11/23 18.5 19.8 16.9 19.4 20.8 18.3 18.5 18.7 18.3 09/12/23 18.5 19.5 16.8 19.1 20.4 18.2 18.4 18.8 18.0 09/13/23 18.8 19.8 17.4 19.5 20.8 18.2 18.4 18.9 17.9 09/14/23 19.0 20.0 17.6 19.8 21.0 18.6 18.6 19.1 18.2 09/15/23 19.0 20.0 17.5 19.8 21.1 18.7 18.8 19.2 18.4 09/16/23 19.3 20.2 17.8 20.1 21.2 19.0 18.8 19.4 18.4 09/17/23 19.4 20.3 18.1 20.2 21.4 19.2 18.9 19.3 18.7 09/18/23 19.4 20.3 18.4 20.5 21.3 19.2 19.0 19.3 18.8 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX C – WATER TEMPERATURE 2023 Poe Water Temperature C-10 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Water Temperature (°C) NFFR at Bardees Bar (WT-4) NFFR above Poe PH (WT-5) NFFR below Poe PH (WT-6) Date Average Maximum Minimum Average Maximum Minimum Average Maximum Minimum 09/19/23 19.4 20.3 18.6 20.6 21.3 19.9 19.0 19.4 18.6 09/20/23 19.1 20.1 17.9 20.5 21.3 19.6 18.8 19.0 18.6 09/21/23 17.8 18.9 16.7 19.3 20.2 18.2 18.3 18.7 18.0 09/22/23 17.3 18.4 16.3 18.1 19.2 16.8 17.6 17.9 17.4 09/23/23 17.5 18.6 16.6 17.7 18.4 16.7 17.5 18.0 17.2 09/24/23 17.3 18.2 16.6 17.5 18.2 16.6 17.4 17.5 17.3 09/25/23 17.3 18.2 16.6 17.5 18.2 16.5 17.2 17.5 17.0 09/26/23 17.2 18.5 16.2 17.7 18.7 16.4 17.2 17.5 17.0 09/27/23 16.9 18.0 16.1 17.2 18.0 16.2 16.9 17.2 16.6 09/28/23 16.8 18.1 16.0 17.1 17.9 16.1 16.9 17.2 16.5 09/29/23 16.6 17.4 16.0 16.8 17.3 16.0 16.7 16.9 16.6 09/30/23 16.1 16.5 15.5 16.3 16.7 15.7 16.3 16.7 16.0 10/01/23 15.8 16.8 15.0 16.3 17.1 15.4 16.0 16.2 15.8 10/02/23 15.8 16.6 14.8 16.1 16.8 15.1 15.7 16.1 15.4 10/03/23 15.8 16.8 15.1 16.4 17.2 15.5 15.9 16.3 15.6 10/04/23 16.2 17.2 15.3 16.6 17.4 15.4 16.1 16.6 15.7 10/05/23 16.4 17.5 15.6 16.9 17.6 15.9 16.4 16.9 16.1 10/06/23 16.5 17.6 15.6 17.1 17.8 16.1 16.5 16.9 16.1 10/07/23 16.4 17.6 15.5 17.0 17.8 16.2 16.6 16.9 16.3 10/08/23 16.2 17.2 15.4 16.7 17.5 15.9 16.3 16.7 16.0 10/09/23 15.7 16.1 15.4 16.0 16.2 15.8 16.1 16.4 15.9 10/10/23 15.5 16.0 14.9 15.8 16.1 15.2 15.8 15.9 15.6 10/11/23 15.1 16.2 14.1 15.5 16.5 14.5 15.5 15.9 15.3 10/12/23 14.5 15.6 13.7 14.9 15.6 14.1 14.9 15.4 14.3 10/13/23 14.2 15.0 13.7 14.5 14.8 13.8 14.5 14.7 14.3 10/14/23 14.1 14.9 13.4 14.6 15.2 13.9 14.3 14.5 14.1 10/15/23 14.0 15.0 13.4 14.5 15.2 13.7 14.1 14.4 13.8 10/16/23 13.9 14.8 13.2 14.4 14.9 13.6 14.2 14.3 13.9 10/17/23 13.9 14.9 13.1 14.4 15.0 13.5 13.8 14.0 13.7 10/18/23 14.3 15.3 13.4 14.6 15.2 13.6 14.1 14.4 13.8 10/19/23 14.4 15.4 13.7 14.9 15.4 14.1 14.4 14.7 14.2 10/20/23 14.5 15.5 13.8 15.0 15.5 14.3 14.6 14.9 14.3 10/21/23 14.6 15.5 14.0 15.1 15.6 14.3 14.6 15.0 14.3 10/22/23 14.6 15.2 14.1 14.9 15.1 14.5 14.6 14.8 14.5 10/23/23 14.6 15.5 13.9 15.0 15.6 14.3 14.7 15.0 14.6 10/24/23 14.6 15.4 13.8 14.9 15.3 14.2 14.6 14.9 14.4 10/25/23 13.9 14.3 13.2 14.2 14.7 13.6 14.5 14.8 14.2 10/26/23 13.3 14.2 12.4 13.5 14.3 12.7 13.9 14.2 13.7 10/27/23 12.6 13.6 11.5 12.8 13.4 12.1 13.3 13.6 13.0 10/28/23 11.4 12.5 10.4 11.7 12.5 10.7 12.4 12.9 11.8 10/29/23 10.5 11.3 9.7 10.7 11.5 9.9 11.2 11.7 10.9 10/30/23 9.8 10.6 9.1 10.2 10.9 9.5 10.4 10.9 9.8 10/31/23 9.4 10.2 8.9 10.0 10.6 9.4 9.8 10.2 9.5 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX D – HYDROLOGY 2023 Poe Water Temperature June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company APPENDIX D HYDROLOGY Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX D – HYDROLOGY 2023 Poe Water Temperature D-1 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table D-1. Daily average flow from Poe Project stations Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 4/1/2023 2283 3878 4/2/2023 2230 3877 4/3/2023 2190 3878 4/4/2023 1980 3843 4/5/2023 1506 3868 4/6/2023 1270 3888 4/7/2023 1729 3876 4/8/2023 2178 3885 4/9/2023 2353 3878 4/10/2023 3985 3886 4/11/2023 7961 3886 4/12/2023 9748 3886 4/13/2023 10531 3883 4/14/2023 9171 3887 4/15/2023 7254 3885 4/16/2023 7174 3874 4/17/2023 7696 3879 4/18/2023 7378 3883 4/19/2023 6311 3891 4/20/2023 5211 3887 4/21/2023 5166 3881 4/22/2023 6505 3666 4/23/2023 7500 3875 4/24/2023 8119 3876 4/25/2023 8414 3883 4/26/2023 8657 3882 4/27/2023 9015 3882 4/28/2023 9715 3878 4/29/2023 10378 3875 4/30/2023 10566 3880 5/1/2023 10016 3882 5/2/2023 8706 3888 5/3/2023 7321 3884 5/4/2023 6299 3880 5/5/2023 5437 3876 5/6/2023 4632 3878 5/7/2023 3965 3805 5/8/2023 5549 2523 5/9/2023 5214 2302 5/10/2023 4986 2593 5/11/2023 5057 2615 5/12/2023 4101 3881 5/13/2023 5343 3883 5/14/2023 6195 3884 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX D – HYDROLOGY 2023 Poe Water Temperature D-2 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 5/15/2023 6104 3886 5/16/2023 5516 3884 5/17/2023 5280 3854 5/18/2023 5933 3881 5/19/2023 5926 3880 5/20/2023 5757 3880 5/21/2023 5515 3886 5/22/2023 5193 3881 5/23/2023 4759 3886 5/24/2023 4322 3884 5/25/2023 3928 3882 5/26/2023 3702 3881 5/27/2023 3724 3882 5/28/2023 3450 3889 5/29/2023 3145 3829 5/30/2023 3246 3824 5/31/2023 3027 3824 6/1/2023 2790 3816 6/2/2023 2805 3820 6/3/2023 2890 3824 6/4/2023 2772 3824 6/5/2023 2537 3820 6/6/2023 2384 3821 6/7/2023 2335 3820 6/8/2023 1823 3836 6/9/2023 1583 3844 6/10/2023 1512 3642 6/11/2023 1510 3718 6/12/2023 1640 3233 6/13/2023 1546 3091 6/14/2023 1507 2896 6/15/2023 1514 2648 6/16/2023 1518 2222 6/17/2023 1518 1938 6/18/2023 1515 1702 6/19/2023 1504 1502 6/20/2023 1410 1687 6/21/2023 1172 1657 6/22/2023 1171 1605 6/23/2023 1171 1470 6/24/2023 1171 1519 6/25/2023 1176 1401 6/26/2023 1172 1314 6/27/2023 1177 1244 6/28/2023 1074 1291 6/29/2023 974 1270 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX D – HYDROLOGY 2023 Poe Water Temperature D-3 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 6/30/2023 892 1430 7/1/2023 802 1279 7/2/2023 794 1277 7/3/2023 799 1277 7/4/2023 805 1137 7/5/2023 807 1238 7/6/2023 797 1923 7/7/2023 803 2087 7/8/2023 722 2253 7/9/2023 718 2281 7/10/2023 653 2202 7/11/2023 661 2225 7/12/2023 601 2336 7/13/2023 598 2410 7/14/2023 566 2395 7/15/2023 565 2355 7/16/2023 552 2392 7/17/2023 554 2090 7/18/2023 553 2253 7/19/2023 547 2157 7/20/2023 547 2106 7/21/2023 547 1935 7/22/2023 550 1847 7/23/2023 547 1839 7/24/2023 550 1895 7/25/2023 546 1677 7/26/2023 547 1965 7/27/2023 545 1724 7/28/2023 572 1719 7/29/2023 588 1799 7/30/2023 592 1632 7/31/2023 584 1712 8/1/2023 578 1722 8/2/2023 581 1728 8/3/2023 574 1647 8/4/2023 575 1727 8/5/2023 541 1715 8/6/2023 530 1745 8/7/2023 497 1779 8/8/2023 487 1806 8/9/2023 453 1765 8/10/2023 444 1839 8/11/2023 419 1670 8/12/2023 409 1887 8/13/2023 390 1800 8/14/2023 381 1873 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX D – HYDROLOGY 2023 Poe Water Temperature D-4 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 8/15/2023 361 1985 8/16/2023 355 1928 8/17/2023 330 1912 8/18/2023 319 1812 8/19/2023 298 1713 8/20/2023 285 1739 8/21/2023 270 2056 8/22/2023 256 2034 8/23/2023 239 2257 8/24/2023 236 1819 8/25/2023 231 2073 8/26/2023 234 1425 8/27/2023 218 2029 8/28/2023 212 1909 8/29/2023 192 2004 8/30/2023 197 2004 8/31/2023 185 2196 9/1/2023 170 2051 9/2/2023 169 2170 9/3/2023 171 2330 9/4/2023 172 2336 9/5/2023 172 2285 9/6/2023 171 2321 9/7/2023 171 2165 9/8/2023 172 2265 9/9/2023 171 2238 9/10/2023 170 2325 9/11/2023 172 2902 9/12/2023 167 2443 9/13/2023 168 2748 9/14/2023 170 2623 9/15/2023 168 2766 9/16/2023 172 2454 9/17/2023 165 2792 9/18/2023 84 2821 9/19/2023 77 2738 9/20/2023 77 2820 9/21/2023 77 2771 9/22/2023 248 2676 9/23/2023 458 2332 9/24/2023 458 2481 9/25/2023 461 2506 9/26/2023 464 2394 9/27/2023 463 2539 9/28/2023 462 2477 9/29/2023 465 2415 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX D – HYDROLOGY 2023 Poe Water Temperature D-5 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Mean Daily Flow (cfs) NFFR at Pulga Poe PH Date NF-23 NF-68 9/30/2023 475 2405 10/1/2023 337 2322 10/2/2023 313 2001 10/3/2023 311 822 10/4/2023 307 690 10/5/2023 317 644 10/6/2023 307 613 10/7/2023 308 706 10/8/2023 311 734 10/9/2023 312 424 10/10/2023 307 619 10/11/2023 307 510 10/12/2023 309 918 10/13/2023 315 452 10/14/2023 305 546 10/15/2023 296 607 10/16/2023 290 604 10/17/2023 282 734 10/18/2023 296 735 10/19/2023 297 641 10/20/2023 297 625 10/21/2023 297 682 10/22/2023 293 800 10/23/2023 286 677 10/24/2023 292 678 10/25/2023 295 532 10/26/2023 290 578 10/27/2023 290 491 10/28/2023 288 559 10/29/2023 295 543 10/30/2023 304 545 10/31/2023 302 457 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX E – METEOROLOGY 2023 Poe Water Temperature June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company APPENDIX E METEOROLOGY Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX E – METEOROLOGY 2023 Poe Water Temperature E-1 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Table E-1. Summary of air temperature data from Poe Powerhouse station. Air Temperature (°C) Date Average Maximum Minimum 04/01/2023 9.8 14.3 4.9 04/02/2023 9.8 13.4 5.8 04/03/2023 5.5 11.2 0.7 04/04/2023 5.2 12.4 -0.8 04/05/2023 7.0 15.1 0.0 04/06/2023 9.6 16.5 3.0 04/07/2023 9.5 11.3 7.6 04/08/2023 12.3 18.1 8.4 04/09/2023 13.6 23.2 5.7 04/10/2023 15.8 25.5 7.8 04/11/2023 15.8 20.5 11.5 04/12/2023 11.2 17.3 6.4 04/13/2023 11.8 19.5 6.3 04/14/2023 10.3 18.9 3.1 04/15/2023 11.7 20.8 4.1 04/16/2023 12.2 19.6 5.4 04/17/2023 10.6 14.3 6.2 04/18/2023 8.5 13.4 4.6 04/19/2023 8.8 15.9 3.1 04/20/2023 11.1 21.5 2.6 04/21/2023 15.7 26.1 6.8 04/22/2023 18.3 27.0 10.7 04/23/2023 16.6 25.9 9.3 04/24/2023 15.7 25.0 8.0 04/25/2023 17.0 29.2 7.0 04/26/2023 19.0 28.6 11.1 04/27/2023 19.1 30.6 9.4 04/28/2023 19.7 31.1 10.6 04/29/2023 19.6 30.2 11.1 04/30/2023 16.8 23.9 9.8 05/01/2023 11.4 12.8 10.1 05/02/2023 10.6 13.1 9.3 05/03/2023 11.9 17.6 6.8 05/04/2023 10.8 12.4 9.6 05/05/2023 11.2 14.3 9.5 05/06/2023 10.2 14.7 8.1 05/07/2023 12.2 17.5 7.4 05/08/2023 11.9 16.2 8.3 05/09/2023 12.6 21.0 5.8 05/10/2023 13.2 21.4 6.5 05/11/2023 14.7 24.5 7.5 05/12/2023 18.4 31.1 9.2 05/13/2023 21.7 33.2 11.7 05/14/2023 21.9 30.3 14.2 05/15/2023 20.2 29.5 12.8 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX E – METEOROLOGY 2023 Poe Water Temperature E-2 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 05/16/2023 20.1 31.5 11.1 05/17/2023 20.1 31.4 10.6 05/18/2023 20.5 31.4 11.8 05/19/2023 20.3 31.0 11.5 05/20/2023 20.3 29.2 12.5 05/21/2023 20.0 29.0 11.8 05/22/2023 20.3 30.5 11.7 05/23/2023 19.6 26.9 12.9 05/24/2023 18.1 24.3 12.6 05/25/2023 17.8 24.6 11.9 05/26/2023 18.1 24.6 12.3 05/27/2023 18.8 26.4 12.7 05/28/2023 19.9 26.1 14.7 05/29/2023 18.5 24.6 12.8 05/30/2023 17.9 25.3 12.1 05/31/2023 17.8 24.7 12.2 06/01/2023 18.7 26.4 12.6 06/02/2023 19.6 28.5 12.1 06/03/2023 20.7 30.9 12.2 06/04/2023 22.5 32.4 13.6 06/05/2023 23.9 34.8 16.0 06/06/2023 19.6 22.6 15.6 06/07/2023 17.7 22.3 12.6 06/08/2023 19.7 25.4 15.5 06/09/2023 20.5 26.6 15.3 06/10/2023 19.7 26.8 13.1 06/11/2023 19.9 27.2 13.4 06/12/2023 18.7 24.3 15.2 06/13/2023 21.1 27.8 16.3 06/14/2023 21.7 28.9 15.6 06/15/2023 22.1 32.5 14.8 06/16/2023 23.9 34.8 14.4 06/17/2023 22.4 30.9 14.0 06/18/2023 21.0 27.1 14.7 06/19/2023 16.7 21.6 12.6 06/20/2023 15.6 24.3 8.6 06/21/2023 17.2 26.8 8.3 06/22/2023 17.8 26.8 10.2 06/23/2023 18.1 25.5 12.5 06/24/2023 18.9 27.0 11.9 06/25/2023 19.1 27.1 12.3 06/26/2023 19.7 28.0 12.6 06/27/2023 20.4 28.7 13.2 06/28/2023 22.2 31.4 13.6 06/29/2023 25.5 37.1 15.5 06/30/2023 25.7 37.0 16.1 07/01/2023 26.7 38.7 17.5 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX E – METEOROLOGY 2023 Poe Water Temperature E-3 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 07/02/2023 27.1 39.2 17.6 07/03/2023 26.2 36.7 17.0 07/04/2023 24.5 33.7 16.4 07/05/2023 24.5 33.1 17.3 07/06/2023 23.5 32.8 15.9 07/07/2023 22.7 31.4 15.6 07/08/2023 22.5 31.8 15.5 07/09/2023 21.0 28.3 14.8 07/10/2023 21.2 31.6 12.3 07/11/2023 23.2 33.8 14.3 07/12/2023 23.6 33.3 14.3 07/13/2023 23.9 34.7 14.2 07/14/2023 25.5 37.4 15.3 07/15/2023 27.8 39.3 18.6 07/16/2023 28.0 40.5 18.2 07/17/2023 29.4 38.3 21.5 07/18/2023 26.6 36.0 18.2 07/19/2023 25.2 36.0 16.2 07/20/2023 25.5 37.4 15.5 07/21/2023 26.9 39.3 16.8 07/22/2023 27.3 39.3 18.3 07/23/2023 27.2 37.5 18.5 07/24/2023 24.2 34.4 15.4 07/25/2023 23.9 35.2 14.2 07/26/2023 24.4 34.5 14.9 07/27/2023 24.0 33.0 15.1 07/28/2023 23.7 33.9 14.6 07/29/2023 23.9 34.4 14.6 07/30/2023 23.8 34.3 14.1 07/31/2023 23.7 34.3 14.2 08/01/2023 23.3 33.3 14.5 08/02/2023 22.5 31.4 14.5 08/03/2023 22.0 30.9 14.8 08/04/2023 22.8 32.4 14.7 08/05/2023 25.0 35.9 16.3 08/06/2023 26.6 38.3 17.0 08/07/2023 25.9 36.4 16.6 08/08/2023 24.4 32.3 16.9 08/09/2023 22.9 31.2 15.1 08/10/2023 23.0 32.7 14.3 08/11/2023 22.3 30.6 14.6 08/12/2023 24.6 33.8 16.7 08/13/2023 26.6 35.8 17.9 08/14/2023 25.5 34.2 18.7 08/15/2023 28.3 40.3 17.7 08/16/2023 29.8 40.1 20.0 08/17/2023 30.1 38.3 23.9 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX E – METEOROLOGY 2023 Poe Water Temperature E-4 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 08/18/2023 26.6 34.9 19.6 08/19/2023 26.0 34.6 18.6 08/20/2023 24.9 30.5 22.1 08/21/2023 22.2 25.0 19.5 08/22/2023 22.5 29.0 18.3 08/23/2023 23.2 33.1 15.5 08/24/2023 24.5 34.8 15.8 08/25/2023 23.4 32.7 16.6 08/26/2023 22.5 32.9 14.2 08/27/2023 22.3 33.4 13.4 08/28/2023 22.6 34.6 13.3 08/29/2023 22.3 33.3 13.6 08/30/2023 24.2 35.6 14.9 08/31/2023 23.2 33.0 14.3 09/01/2023 20.2 22.5 16.5 09/02/2023 18.6 21.6 15.5 09/03/2023 18.7 23.7 15.8 09/04/2023 20.2 29.2 13.8 09/05/2023 21.2 30.2 14.1 09/06/2023 21.8 31.0 14.4 09/07/2023 21.6 31.4 14.3 09/08/2023 22.0 31.7 14.2 09/09/2023 22.1 32.2 14.5 09/10/2023 22.0 34.0 13.7 09/11/2023 21.7 33.4 13.4 09/12/2023 21.5 32.6 13.4 09/13/2023 22.2 32.1 14.2 09/14/2023 24.4 35.0 15.2 09/15/2023 22.7 33.7 13.9 09/16/2023 23.0 31.6 15.9 09/17/2023 21.5 28.6 15.5 09/18/2023 20.9 27.8 15.3 09/19/2023 20.5 27.3 15.1 09/20/2023 20.3 27.7 14.2 09/21/2023 18.7 25.5 13.5 09/22/2023 17.4 26.1 10.2 09/23/2023 17.6 26.4 10.9 09/24/2023 17.9 25.8 11.2 09/25/2023 17.3 23.2 11.3 09/26/2023 18.2 25.4 13.6 09/27/2023 17.4 27.6 10.7 09/28/2023 17.8 28.0 11.1 09/29/2023 16.9 24.1 10.2 09/30/2023 14.8 17.4 12.9 10/01/2023 15.5 22.6 10.1 10/02/2023 15.9 24.8 9.0 10/03/2023 17.5 27.1 11.1 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 APPENDIX E – METEOROLOGY 2023 Poe Water Temperature E-5 June 2024 Poe Project, FERC No. 2107 © 2024, Pacific Gas and Electric Company Air Temperature (°C) Date Average Maximum Minimum 10/04/2023 20.9 32.1 12.1 10/05/2023 21.7 33.0 15.0 10/06/2023 21.0 32.6 14.1 10/07/2023 20.8 33.7 13.3 10/08/2023 20.3 32.9 13.5 10/09/2023 17.1 21.0 13.3 10/10/2023 15.9 19.6 12.8 10/11/2023 14.8 21.5 10.2 10/12/2023 15.7 26.2 8.3 10/13/2023 14.8 23.1 8.2 10/14/2023 16.9 23.9 13.2 10/15/2023 16.8 27.7 10.2 10/16/2023 16.7 26.7 9.9 10/17/2023 17.4 29.9 9.6 10/18/2023 17.6 30.1 10.8 10/19/2023 19.0 33.9 11.3 10/20/2023 19.0 30.1 12.9 10/21/2023 17.2 25.2 11.5 10/22/2023 15.1 18.1 12.4 10/23/2023 16.2 25.6 10.3 10/24/2023 15.0 22.1 8.7 10/25/2023 13.5 16.8 11.9 10/26/2023 11.3 19.4 6.4 10/27/2023 9.3 17.5 4.1 10/28/2023 9.6 19.7 3.1 10/29/2023 13.3 22.9 4.6 10/30/2023 11.3 21.1 4.9 10/31/2023 10.6 23.1 3.2 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 ENCLOSURE 2 Document Accession #: 20240628-5155 Filed Date: 06/28/2024 From:Ramirez-Doble, Sky To:Maher, Michael@Wildlife; Fisch, Nathan@Waterboards; Dyke, Jessica@Waterboards; Sable, Kurt A -FS; Alvarez, Dawn -FS; Cayo, Lori -FS; "Tracey Ferguson (Plumas Co Planning Director)"; Brenzovich, Erika -FS; "Aondrea_Bartoo@fws.gov"; Lawson, Beth@Wildlife; Loeser, Kamie Cc:Salve, Rohit; Joseph, Matthew; McCready, Chadwick Subject:RE: FERC 2107: Poe 2023 Draft Water Temperature Monitoring Data Report Date:Friday, April 19, 2024 11:31:00 AM Hi Michael, The water temperature logger at WT-2 was not recovered in November following the monitoring period (through October) due to scheduling conflicts associated with instrument recovery elsewhere in the NFFR watershed. Subsequently, high flows/safety issues over the winter period have delayed recovery. The logger is attached to a large boulder that is underwater at minimum flow release (MIF) to prevent disturbance/vandalism and avoid disturbance of possible frog sites; therefore, it is not accessible during flows elevated much above MIF. Recovery in 2024 will be scheduled as soon as flows return to near MIF (TBD with an April target). The report will be amended with the WT-2 logger data once recovered. The water temperature loggers at WT-6 were not recovered in November at the end of the monitoring period (through October) due to scheduling with PG&E boat support in November (the PG&E Division Water Crew boat is required to access the exclusion buoy downstream of Poe Powerhouse). Subsequently, high flows/safety issues over the winter period have prevented recovery. The water temperature loggers are attached to the buoy system to facilitate mid-stream mid-depth deployment as bank attachment is not possible at this location. Recovery is currently being coordinated with PG&E Division boat support and will occur once flows are deemed safe to launch into the river (TBD with an April target). The report will be amended once the WT-6 loggers are recovered. With gratitude, Sky Ramirez-Doble He/Him/His Hydro License Coordinator | Power Generation Pacific Gas & Electric Company c: (530) 250-7002 e: s9rv@pge.com From: Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov> Sent: Thursday, March 28, 2024 1:36 PM To: Ramirez-Doble, Sky <S9RV@pge.com>; Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; Dyke, Jessica@Waterboards <Jessica.Dyke@Waterboards.ca.gov>; Sable, Kurt A -FS <kurt.sable@usda.gov>; Alvarez, Dawn -FS <dawn.alvarez@usda.gov>; Cayo, Lori -FS <lori.cayo@usda.gov>; 'Tracey Ferguson (Plumas Co Planning Director)' <traceyferguson@countyofplumas.com>; Brenzovich, Erika -FS <erika.brenzovich@usda.gov>; 'Aondrea_Bartoo@fws.gov' <aondrea_bartoo@fws.gov>; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; Loeser, Kamie <kloeser@buttecounty.net> Cc: Salve, Rohit <ROSK@pge.com>; Joseph, Matthew <MWJA@pge.com>; McCready, Chadwick <COMM@pge.com> Document Accession #: 20240628-5155 Filed Date: 06/28/2024 Subject: RE: FERC 2107: Poe 2023 Draft Water Temperature Monitoring Data Report CAUTION: EXTERNAL SENDER! This email was sent from an EXTERNAL source. Do you know this person? Are you expecting this email? Are you expecting any links or attachments? If suspicious, do not click links, open attachments, or provide credentials. Don't delete it. Report it by using the "Report Phish" button. Hello Sky, Sub-sections 3.3.2 and 3.3.6 state that results from stations WT-2 and WT-6 are pending recovery of logger. Is this delay due to high flows/safety and when do you expect the logger results will be available? Do you plan to update the draft 2023 Water Temperature Monitoring Report when the data has been recovered and analyzed? Other than this item the Department has no other comments. Thank you Sky, Michael Maher Region 2 FERC Coordinator | ( Cell: 916-597-5505 California Department of Fish & Wildlife | North Central Region 1701 Nimbus Road, Rancho Cordova | michael.maher@wildlife.ca.gov From: Ramirez-Doble, Sky <S9RV@pge.com> Sent: Wednesday, February 28, 2024 2:53 PM To: Fisch, Nathan@Waterboards <Nathan.Fisch@Waterboards.ca.gov>; Dyke, Jessica@Waterboards <Jessica.Dyke@Waterboards.ca.gov>; Sable, Kurt A -FS <kurt.sable@usda.gov>; Alvarez, Dawn -FS <dawn.alvarez@usda.gov>; Cayo, Lori -FS <lori.cayo@usda.gov>; 'Tracey Ferguson (Plumas Co Planning Director)' <traceyferguson@countyofplumas.com>; Brenzovich, Erika -FS <erika.brenzovich@usda.gov>; 'Aondrea_Bartoo@fws.gov' <aondrea_bartoo@fws.gov>; Lawson, Beth@Wildlife <Beth.Lawson@wildlife.ca.gov>; Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov>; Loeser, Kamie <kloeser@buttecounty.net> Cc: Salve, Rohit <ROSK@pge.com>; Joseph, Matthew <MWJA@pge.com>; McCready, Chadwick <COMM@pge.com> Subject: FERC 2107: Poe 2023 Draft Water Temperature Monitoring Data Report WARNING: This message is from an external source. Verify the sender and exercise caution when clicking links or opening attachments. Hi everyone, Please see the attached 2023 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 March 31, 2024. Pursuant to the Plan, PG&E will include comments into the final report, which will be filed with FERC by June 30, 2024. If PG&E does not adopt a recommendation, the filing will include PG&E’s reasons based on project-specific information. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 With gratitude, Sky Ramirez-Doble He/Him/His Hydro License Coordinator | Power Generation Pacific Gas & Electric Company c: (530) 250-7002 e: s9rv@pge.com You can read about PG&E’s data privacy practices at PGE.com/privacy. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 From:Sable, Kurt - FS, CA To:Ramirez-Doble, Sky Subject:FW: FERC 2107: Poe 2023 Draft Water Temperature Monitoring Data Report Date:Friday, March 29, 2024 4:12:27 PM Attachments:image001.png image002.png image003.png image004.png Attachment 1-2023 Water Temperature Monitoring Data Report.pdf CAUTION: EXTERNAL SENDER! This email was sent from an EXTERNAL source. Do you know this person? Are you expecting this email? Are you expecting any links or attachments? If suspicious, do not click links, open attachments, or provide credentials. Don't delete it. Report it by using the "Report Phish" button. Sky, Was WT-2 recovered? No other comments from the PNF. From: Brenzovich, Erika - FS, CA <erika.brenzovich@usda.gov> Sent: Friday, March 29, 2024 3:54 PM To: Sable, Kurt - FS, CA <kurt.sable@usda.gov> Subject: FW: FERC 2107: Poe 2023 Draft Water Temperature Monitoring Data Report Erika Brenzovich Recreation & Lands Program Manager (developed & dispersed recreation, recreation special uses, & lands) Forest Service Plumas National Forest, Supervisor's Office office: 530-283-7798 mobile: 530-927-8532 erika.brenzovich@usda.gov 159 Lawrence St. Quincy, CA 95971 www.fs.fed.us Caring for the land and serving people From: Ramirez-Doble, Sky <S9RV@pge.com> Sent: Wednesday, February 28, 2024 2:53 PM To: Fisch, Nathan@Waterboards <Nathan.Fisch@waterboards.ca.gov>; Dyke, Jessica@Waterboards <Jessica.Dyke@Waterboards.ca.gov>; Sable, Kurt - FS, CA <kurt.sable@usda.gov>; Alvarez, Dawn - FS, CA <dawn.alvarez@usda.gov>; Cayo, Lori - FS, CA <lori.cayo@usda.gov>; 'Tracey Ferguson (Plumas Co Planning Director)' <traceyferguson@countyofplumas.com>; Brenzovich, Erika - FS, CA Document Accession #: 20240628-5155 Filed Date: 06/28/2024 <erika.brenzovich@usda.gov>; 'Aondrea_Bartoo@fws.gov' <aondrea_bartoo@fws.gov>; 'Lawson, Beth@Wildlife' <Beth.Lawson@wildlife.ca.gov>; Maher, Michael@Wildlife <Michael.Maher@wildlife.ca.gov>; Loeser, Kamie <kloeser@buttecounty.net> Cc: Salve, Rohit <ROSK@pge.com>; Joseph, Matthew <MWJA@pge.com>; McCready, Chadwick <COMM@pge.com> Subject: FERC 2107: Poe 2023 Draft Water Temperature Monitoring Data Report Hi everyone, Please see the attached 2023 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 March 31, 2024. Pursuant to the Plan, PG&E will include comments into the final report, which will be filed with FERC by June 30, 2024. If PG&E does not adopt a recommendation, the filing will include PG&E’s reasons based on project-specific information. With gratitude, Sky Ramirez-Doble He/Him/His Hydro License Coordinator | Power Generation Pacific Gas & Electric Company c: (530) 250-7002 e: s9rv@pge.com You can read about PG&E’s data privacy practices at PGE.com/privacy. This electronic message contains information generated by the USDA solely for the intended recipients. Any unauthorized interception of this message or the use or disclosure of the information it contains may violate the law and subject the violator to civil or criminal penalties. If you believe you have received this message in error, please notify the sender and delete the email immediately. Document Accession #: 20240628-5155 Filed Date: 06/28/2024 Document Content(s) PGE20240628_2107_2023_Water_Temperature_Monitoring.pdf....................1 Document Accession #: 20240628-5155 Filed Date: 06/28/2024