WATER TEMPERATURE AND WATER QUALITY MONITORING. Pit 3, 4, and 5 Hydroelectric Project FERC Project No. 233

Transcription

1 WATER TEMPERATURE AND WATER QUALITY MONITORING 2012 Pit 3, 4, and 5 Hydroelectric Project FERC Project No. 233 Draft Prepared By: January 2013

2 TABLE OF CONTENTS Page Executive Summary...iii 1.0 Introduction Study Area Consultation Methods Summary Regional Hydrologic and Meteorological Conditions Monitoring Stations Water Quality Monitoring Water Temperature Monitoring Lake Britton Algae Bloom Assessment Results Monitoring Setting Project Hydrology Lake Britton Synoptic Water Quality River Reach Synoptic Water Quality Continuous Water Temperature Monitoring Lake Britton Algae Bloom Monitoring Discussion Lake Britton Water Quality Pit River Water Quality Comparison of 2012 Results with Basin Plan Objectives...47 Draft Water Temperature and Water Quality Report i January 2013

3 4.4 Validation of Telemetry Monitoring System Lake Britton Algae Blooms Recommendations References...54 APPENDICES Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H License Requirements and Plan Objectives Methods and QA/QC Documents Meteorological Monitoring Data Hydrology Data Lake Britton Profile Data Continuous Water Temperature Data Lake Britton Algae Bloom Photographic Documentation Consultation Documentation Draft Water Temperature and Water Quality Report ii January 2013

4 EXECUTIVE SUMMARY The Water Temperature and Water Quality Monitoring Plan (Plan) (2008b) for the Pit 3, 4, and 5 Project was developed to address Article 401 of the FERC license, which implements Condition 13 and Mitigation Measure No. 2 of the State Water Resource Control Board (State Water Board) 401 Certification and the U.S. Department of Agriculture-Forest Service (USDA-FS) 4(e) Condition 22. This document presents the results of the second year of summertime monitoring following implementation of the full license-required flow regime. Water temperature and dissolved oxygen profiles were collected monthly (June through September) from Lake Britton at one station near the dam. Synoptic measurements of water temperature and dissolved oxygen were made monthly (June through September) from stations established in each of the Project reaches (one station in the Pit 3 and Pit 5 reaches, and two stations in the Pit 4 Reach). Continuous recording thermographs were also installed at the four river stations utilized for synoptic monitoring. Visual surveys for the presence/absence of algae blooms in Lake Britton were conducted on a monthly schedule. A total of 9 stations around Lake Britton were evaluated and photographed during each at site visit. Results of the 2012 water quality monitoring effort were compared with available data from previous monitoring efforts in an attempt to identify changes in the water quality related to changes in the license-required flow regime in each reach. The data comparison suggests that the current flow regime has warmed water temperatures in the metalimnion-hypolimnion of Lake Britton in July and August. This is likely related to the rapid utilization of the cool water associated with Burney Creek in the hypolimnion, and the entrainment of warmer waters from the upper layers of the water column. The warming of the deeper waters of Lake Britton is reflected in warmer water temperatures measured in the upper Pit 3 Reach in The 2012 data indicated that mean daily temperatures in the Pit 3 Reach during July and August below Lake Britton were approximately 0.8 C and 1.0 C warmer respectively, than the historical average. The Pit 4 and Pit 5 reaches also exhibited a slight warming of water temperatures when compared with historical data. This Draft Water Temperature and Water Quality Report iii January 2013

5 warming ranged from 0.1 C in July to 0.8 C in August, for the Pit 4 Reach. For the Pit 5 Reach the warming was measured at 0.4 C for July and 1.0 C for August. The data of record for water temperature compliance purposes is derived from the permanent data-loggers installed at station PH-30 and PH-27. The compliance information for the 2012 water year was transmitted to the State Water Board via PG&E letter dated 12/20/12. Any difference between the number of exceedance days contained in the compliance transmittal and the seasonally installed recorders is related to variations in instrument accuracy and rounding errors. Information presented in the letter will not be restated as part of this document. Based on the data from the seasonally installed temperature recorders, average water temperatures greater than 20 C were not measured in the Pit 3 reach during the 2012 monitoring period (June through September), a total of one day was measured in the Pit 4 Reach (at PH-30), and a total of four days were measured in the Pit 5 Reach (at PH-27). The results of the synoptic water temperature monitoring were compared with the output from both the in situ data-logger and the real-time telemetry system from both PH-30 and PH-27. The results of this analysis indicated that the difference between all three sources was minimal, ranging from 0.1 to 0.2 C, and averaging 0.1 C. This is within the range of defined instrument error (±0.1 C). The results of the 2012 dissolved oxygen (DO) monitoring effort were compared with applicable Basin Plan objectives. During all periods, DO concentrations in Project-affected waters were measured above all applicable Basin Plan (WARM, COLD and SPWN) objectives. The blue-green algae species associated with nuisance blooms was only observed at elevated concentrations in August The 2012 bloom was more extensive and exhibited higher site specific concentrations than 2011, which exhibited minimal development late in the season. Draft Water Temperature and Water Quality Report iv January 2013

6 1.0 INTRODUCTION The monitoring requirements addressed in the Pit 3, 4, and 5 Project Water Temperature and Water Quality Monitoring Plan (Plan) (2008b) were derived from Article 401 of the new FERC license, which implements Condition 13 and Mitigation Measure No. 2 of the State Water Resource Control Board (State Water Board) 401 Certification and the U.S. Department of Agriculture-Forest Service (USDA-FS) 4(e) Condition 22. A complete description of License Requirements is contained in Appendix A. This document will focus on summer water quality monitoring associated with Mitigation Measure No. 2 (State Water Board 401) and Condition 22 (USDA-FS 4(e)). The summer monitoring was designed to characterize the effects of the new minimum in-stream flows (MIF) required by the new license on water quality (specifically dissolved oxygen [DO] and water temperature) during the warmer summer months. Monitoring will be continued for three consecutive years during the June 1 through September 30 period following full implementation of the new MIF regime (MIF started in 2011). This document presents the results of the first year of monitoring. 1.1 STUDY AREA The Pit 3, 4, and 5 Hydroelectric Project is located on the Pit River in Shasta County California (Figure 1). 1.2 CONSULTATION Documentation of consultation with the Technical Review Group (TRG) will be added to this draft report after receipt of TRG comments and following the annual TRG meeting in March Comments will be documented in the consultation record (Appendix H). Draft Water Temperature and Water Quality Report 1 January 2013

7 Figure 1. Location of the Pit 3, 4, and 5 Hydroelectric Project in northeastern California. Draft Water Temperature and Water Quality Report 2 January 2013

8 2.0 METHODS SUMMARY 2.1 REGIONAL HYDROLOGIC AND METEOROLOGICAL CONDITIONS Regional runoff into the Project was defined using data from the United States Geological Survey (USGS) stream gage on the Pit River downstream of Pit 1 Powerhouse (USGS Gage No (USGS 2011)). Project specific data regarding water levels in Lake Britton and stream discharge in the three bypass reaches were defined using data from existing PG&E permanent monitoring stations (PG&E 2011a). Regional meteorological conditions were defined using data from a permanent station located at Hat Creek Powerhouse No.1 (CDEC 2012). Data from the Hat Creek Powerhouse No.1 meteorological stations were used to define the monthly air temperature exceedance characteristics for the June through September period compared with the long term data record. This station was also used to define annual precipitation and place 2012 in terms of percent of normal based on the period of record. As stipulated in the Plan (PG&E 2008b), a seasonal meteorological monitoring station was deployed at the Pit 3 Powerhouse Intake. This location is different from the location specified in the Study Plan (Big Bend), and was selected due to the longer period of use at the Pit 3 Intake location and that the USDA-FS property where the original station had been located during relicensing was abandoned. In order to understand meteorological conditions that may contribute to water temperature exceedance, the seasonal station monitored air temperature, wind speed and direction, solar radiation, and relative humidity, and was deployed June through September, as required in the Study Plan. 2.2 MONITORING STATIONS Stations used during the water quality monitoring effort are identified in Figure 2, and a detailed description of each station included in Table 1. When monitoring stations were located at relicensing study sites, the relicensing site location identification number was retained (i.e., PR2 and PR7). Water quality and water temperature profiles were collected from Lake Britton Draft Water Temperature and Water Quality Report 3 January 2013

9 LB-P1 LB-P1 PH-27 PH-27 PR7 PR7 Pit 3 Met Pit 3 Met PH-30 PH-30 PR2 PR2 Figure 2 Water quality and water temperature monitoring stations. Draft Water Temperature and Water Quality Report 4 January 2013

10 Table 1. Monitoring Station Locations and Description. UTM Coordinates Monitoring Period Station ID Station Description Zone Easting Northing Start End Activity Pit 3 Intake Lake Britton at Pit 3 Powerhouse Intake 10T /01/12 10/01/12 Seasonal meteorology station (June through September) LB-P1 1 Lake Britton near Dam (profile station) 10T /01/12 10/01/12 Monthly water quality profiles (June through September) PR2 1 Pit River below Pit 3 Dam 10T /01/12 10/01/12 Monthly in situ water quality sampling, continuous water temperature monitoring (June through September) PR7 1 Pit River below Pit 4 Dam 10T /01/12 10/01/12 Monthly in situ water quality sampling, continuous water temperature monitoring (June through September) PH-30 Pit River - Pit 4 Reach at PH-30 Monthly in situ water quality sampling, continuous water 10T /01/12 10/01/12 Gage temperature monitoring (June through September) PH-27 2 Pit River - Pit 5 Reach at PH-27 Monthly in situ water quality sampling, continuous water 10T /01/12 10/01/12 Gage temperature monitoring (June through September) PP1 near Pit 3 Dam - upstream of Pit Photo point for Lake Britton algae bloom documentation 10T /01/12 10/01/12 3 Intake (monthly June through September) Photo point for Lake Britton algae bloom documentation PP2 South ferry inlet 10T /01/12 10/01/12 (monthly June through September) PP3 McArthur-Burney Falls State Photo point for Lake Britton algae bloom documentation 10T /01/12 10/01/12 Park - Marina dock (monthly June through September) PP4 McArthur-Burney Falls State Photo point for Lake Britton algae bloom documentation 10T /01/12 10/01/12 Park - Swim area (monthly June through September) PP5 McArthur-Burney Falls State Photo point for Lake Britton algae bloom documentation 10T /01/12 10/01/12 Park - Western point (monthly June through September) Photo point for Lake Britton algae bloom documentation PP6 Dusty Campground 10T /01/12 10/01/12 (monthly June through September) PP7 Jamo Point boat ramp - Fishing Photo point for Lake Britton algae bloom documentation 10T /01/12 10/01/12 platform (monthly June through September) Photo point for Lake Britton algae bloom documentation PP8 Pines picnic area 10T /01/12 10/01/12 (monthly June through September) PP9 North Shore Campground - Discontinued due to lack of access in 2012 and high recreational 10T /01/12 10/01/12 Swim cove generated turbidity PP10 North Shore Campground - Discontinued due to lack of access in 2012 and high recreational 10T /01/12 10/01/12 Point generated turbidity PP11 North ferry access to the Clark Photo point for Lake Britton algae bloom documentation 10T /01/12 10/01/12 Creek arm (monthly June through September) Photo point for Lake Britton algae bloom documentation PP12 Pit 3 Dam overlook 10T /01/12 10/01/12 (monthly June through September) 1) Station ID and location is same used during relicensing monitoring effort. 2) Station location is similar to PR16 used during the relicensing effort. Draft Water Temperature and Water Quality Report 5 January 2013

11 immediately upstream of Pit 3 Dam and the Pit 3 Powerhouse Intake (Station LB-P1). A total of four river reach water quality monitoring stations were established in the Project. In the Pit 3 Reach, a station was located downstream of Pit 3 Dam (Station PR2). The Pit 4 Reach had two monitoring locations; downstream of Pit 4 Dam (Station PR7), and at PH-30 (PG&E s permanent flow monitoring gage). One monitoring station was utilized in the Pit 5 Reach at PH-27 (PG&E s permanent flow monitoring gage). 2.3 WATER QUALITY MONITORING During 2012, water quality monitoring was conducted monthly from June through September. Water quality was measured in situ using a YSI 550A or HydroLab Model MS5 multiparameter water quality sonde. The analytical parameters of interest (synoptic water temperature, and DO) were also measured at each river station. All sampling was done from a bank location, in waters that were free flowing and well mixed. Water quality profiles were collected in Lake Britton also using the MS5 multi-parameter sonde. Profiles were made near the thalwag (determined using a digital acoustic depth finder), reservoir conditions were measured at 1-meter intervals through the entire water column. All water quality assurance and quality control practices, as outlined in PG&E s Quality Assurance Program Plan (QAPP), were followed during the 2012 monitoring effort (PG&E 2011b). The calibration, maintenance, and quality assurance and control (QA/QC) information associated with the water quality monitoring effort is included in Appendix B. The YSI 550A water quality sonde has a temperature accuracy of ±0.03 C, and a dissolved oxygen accuracy of ±0.3 mg/l or two percent of reading whichever is greater for values ranging from 0 to 20 mg/l. The MS5 water quality sonde has a temperature accuracy of ±0.01 C, and a dissolved oxygen accuracy of ±0.1 mg/l ( 8 mg/l), ±0.2 mg/l (>8 mg/l), ±10% of reading (>20 mg/l). 2.4 WATER TEMPERATURE MONITORING Water temperature data for all of the Pit 3, Pit 4 and Pit 5 sites were obtained from June 1 through September 30, Stream temperatures were automatically measured in situ using Draft Water Temperature and Water Quality Report 6 January 2013

12 Starmon mini digital thermographs at all four stations. The thermographs were set to record instantaneous water temperature at 15-minute intervals and were downloaded and stored to disc during monthly site visits. Collected data were then used to generate hourly average and daily maximum, minimum, and mean water temperature values. The Starmon mini is a microprocessor-controlled temperature logger that stores data in nonvolatile memory. The Starmon mini recorders are capable of recording temperatures to ± C between 5 C and 40 C. However, for the purposes of this effort, each thermograph was calibrated to a minimum accuracy of ± 0.1 C in a controlled (i.e., American Standard Test Methods) water bath. All quality assurance and control practices as outlined in PG&E s QAPP were followed during the 2012 monitoring effort (PG&E 2011b). Temperature logger calibration was conducted before deployment and at the end of the monitoring period. All deployed thermographs showed no sign of drift and required no calibration adjustment. A record of recorder deployment is contained in Appendix B. The calibration, maintenance, and QA/QC information associated with the water temperature monitoring effort is included in Appendix B. Each water temperature recorder was deployed inside a protective metal housing which was secured to the stream bank with a steel chain. Locations were chosen which provided representative and homogeneous thermal conditions, accessibility, and best known security from vandalism or theft. 2.5 LAKE BRITTON ALGAE BLOOM ASSESSMENT A visual assessment survey for the presence/absence of algal blooms in Lake Britton was conducted monthly during scheduled water-quality-monitoring site visits. Eleven locations around Lake Britton were monitored during each survey. These locations are identified in Figure 3 and described in Table 1. During each survey, photographs were taken from defined reference points in order to assess water clarity and confirm the presence or absence of algal blooms at each location. Draft Water Temperature and Water Quality Report 7 January 2013

13 PP12 Pit 3 Dam Overlook PP5 Burney Park Swim Area PP9 North Shore Campground PP10 North Shore Campground PP8 Pines picnic area PP4 Burney Park - Marina PP3 Burney Park West Point PP7 Jamo Point PP2 South Ferry Inlet PP11 North Ferry Inlet PP6 Dusty Campground PP1 Pit 3 Dam upstream of intake Figure 3. Location of Lake Britton Algae Monitoring Stations. Draft Water Temperature and Water Quality Report 8 January 2013

14 3.0 RESULTS MONITORING SETTING The Department of Water Resource (DWR) classified 2012 as a dry year with regard to the greater Sacramento River Basin (CDEC 2012). The upper Pit River watershed often exhibits conditions that are different than those characterizing the greater Sacramento River Basin as defined in the DWR runoff index. A historical perspective of ambient conditions is summarized in Table 2, including a comparison of the State Index with information specific to the Pit River watershed. The ambient conditions in the Pit River watershed that defined the 2012 monitoring effort are discussed in detail in the following sections Meteorology Data from a regional station (Hat Creek Powerhouse No.1) were used to characterize 2012 summer period air temperatures relative to long term trends. These data are summarized in Table 3. The long-term data indicated that mean monthly air temperatures in June and July were below normal, August conditions were considered above normal, and September considered hot. A complete listing of data used to generate Table 3 are contained in Appendix C. The results of the meteorological monitoring from the seasonally installed station at Pit 3 Intake are summarized in Table 4. The peak air temperature (26 C daily average) for the period was recorded at this station on August 4, A complete listing of data used to generate Table 4 are contained in Appendix C Regional Runoff Data from the regional station (USGS Station Pit River downstream of Pit 1 Powerhouse) were used to characterize runoff conditions in the Pit River watershed in These data are summarized in Table 5. For the 37- year period of record from the USGS gage station, the 2012 Draft Water Temperature and Water Quality Report 9 January 2013

15 Table 2. Summary of regional data characterizing 2012 monitoring conditions. Watershed Runoff Precipitation (inches) 4 DWR Runoff Sac. River Basin Flow Into Pit River Hat Creek Pit 5 Water Year Index 1 WY Type 1 Lake Britton 2 WY Type 3 PH No.1 PH Blw Norm 1260 C Dry Pending p Wet 1,984 Abv Norm 16.5 p Blw Norm 1,271 C Dry Dry 1,338 C Dry C Dry 1,456 C Dry Dry 1,367 Dry Wet 2,646 Wet Abv Norm 1,686 Abv Norm Blw Norm 1,599 Blw Norm Abv Norm 1,656 Blw Norm Dry 1,524 Blw Norm Dry 1,482 C Dry Abv Norm 1,911 Abv Norm Average , Maximum , WY Minimum , WY Data years As defined by Dept. Water Resources (DWR) for the greater Sacramento River basin. Index is based on an average from 8-stations. Water Year (WY) type as defined by DWR. ( 2 Annual average discharge (cfs) at USGS station Pit River below Pit No. 1 PH near Fall River Mills, CA. ( 3 Water year type applies the same threshold percentages as the state index to define runoff into Lake Britton from the Pit River USGS Gage Station National Weather Service cooperative stations - operated by PG&E. ( P = partial data includes periods with incomplete data exceeding standard exclusions. Draft Water Temperature and Water Quality Report 10 January 2013

16 Table 3. Summary of mean monthly air temperatures from Hat 1 Powerhouse and percent exceedance 1 rankings. Monthly Mean Air Temperatures - Hat 1 Powerhouse 2 June July August September Mean Exceedance Mean Exceedance Mean Exceedance Mean Exceedance Year ( C) (%) Class ( C) (%) Class ( C) (%) Class ( C) (%) Class % Blw Norm % Blw Norm % Abv Norm % Hot % Cold % Blw Norm % Norm % Hot % Cold % Norm % Blw Norm % Blw Norm % Norm % Norm % Blw Norm % Abv Norm % Norm % Norm % Abv Norm % Norm % Norm % Blw Norm % Norm % Blw Norm % Abv Norm % Norm % Blw Norm % Blw Norm % Cold % Abv Norm % Norm % Cold % Abv Norm % Norm % Norm % Blw Norm % Abv Norm % Abv Norm % Blw Norm % Abv Norm % Norm % Abv Norm % Blw Norm % Norm % Norm % Norm % Norm % Norm % Abv Norm % Cold % Norm % Blw Norm Maximum Minimum Average Data Years Exceedance is defined as the percent of total observations that have exceeded this value in the period of record. 2 National Weather Service cooperative station (HTC) - operated by PG&E. ( 3 Provisional data, subject to change following quality control review, which was not complete at the time report production. 4 Provisional data not available, calculated based on raw data that had not been put through preliminary review, subject to change. 5 Data reported in the 2011 annual report was preliminary and subject to revision, actual data presented for 2011 in the 2012 report is final. There were changes to these values after quality control review, which resulted in changes in ranking. As a result values reported in the 2012 report are different than those reported in the 2011 report. Draft Water Temperature and Water Quality Report 11 January 2013

17 Table 4. Summary of 2012 seasonal meteorological monitoring at Pit 3 Intake. Daily Average 1 Data Station Units Month Max Min Mean Days Pit 3 Intake Station Air Temperature ( C) June July August September Relative Humidity (%) June July August September Solar Radiation 2 (watts/m 2 ) June July August September Wind Speed (m/s) June July August September Based on hourly average data. 2 Solar data are processed to eliminate night time zero readings. Draft Water Temperature and Water Quality Report 12 January 2013

18 Table 5. Summary of Pit River inflow to Lake Britton during 2012 monitoring period. Monthly Mean Stream Flow- Pit River below Pit 1 Powerhouse near Fall River Mills 1 June July August September Flow Exceedance 2 Flow Exceedance 2 Flow Exceedance 2 Flow Exceedance 2 Year (cfs) (%) Class (cfs) (%) Class (cfs) (%) Class (cfs) (%) Class % Dry % Dry % Dry % Dry % Wet % Norm % Norm % Blw Norm % Norm % Dry % Blw Norm % Blw Norm % Dry % Blw Norm % Blw Norm % Dry % Norm % Blw Norm % Blw Norm % Blw Norm % Dry % Blw Norm % Blw Norm % Blw Norm % Abv Norm % Abv Norm % Norm % Norm % Abv Norm % Norm % Norm % Norm % Blw Norm % Dry % Dry % Blw Norm % Norm % Norm % Dry % Abv Norm % Blw Norm % Blw Norm % Norm % Norm % Blw Norm % Norm % Norm % Norm % Norm % Abv Norm % Wet % Abv Norm Maximum Minimum Average Data Years Monthly average discharge at USGS station Pit River below Pit 1 Powerhouse near Fall River Mills, CA. ( 2 Exceedance is defined as the percent of total observations that have exceeded this value in the period of record. Draft Water Temperature and Water Quality Report 13 January 2013

19 water year ranked in the 6 th percentile (95 percent exceedance). This ranking placed 2012 runoff in the dry classification (critical dry using State DWR percentile categories). The distribution of runoff was such that conditions in the late spring and early summer were drier than normal. Inflow in May of 2012 was ranked at 92 percent (dry) (Table 5). Inflow for the June through September monitoring period all fell within the dry classification as well, ranking at 97, 97, 92, and 95 percent exceedance respectively. A complete listing of data used to generate Table 5 are contained in Appendix D. 3.2 PROJECT HYDROLOGY A complete listing of hydrologic data used in this section is contained in Appendix D Lake Britton Water Levels Reservoir elevation data for Lake Britton in 2012 are summarized in Table 6. Figure 4 illustrates water level fluctuations during the monitoring period. As indicated, reservoir operations were in normal mode for the entire monitoring period. Normal operations were characterized by daily fluctuations in reservoir elevation ranging from 0.43 to 1.83 ft (Appendix D) Pit 3 Reach Releases from Pit 3 Dam to the Pit 3 Reach (as measured at Gage PH-35), during the 2012 monitoring period (June through September) ranged from 308 to 332 cfs. Average flow for the monitoring period was 326 cfs. Figure 5 compares mean daily flows in the Pit 3 Reach with mean daily flows in both the Pit 4 and Pit 5 reaches. Draft Water Temperature and Water Quality Report 14 January 2013

20 Table 6. Summary of 2012 stream flow in Pit 3, 4, and 5 Project reaches. Daily Average Data Station Description Month Maximum Minimum Mean Station PH-37 Elevation (ft amsl 1 ) June Lake Britton at Dam July August September Station PH-35 Flow (cfs) June (Release to Pit 3 Reach) July August September Station PH-30 Flow (cfs) June (Pit 4 Reach) July August September Station PH-27 Flow (cfs) June (Pit 5 Reach) July August September amsl = above mean seal level based on a USGS datum. Draft Water Temperature and Water Quality Report 15 January 2013

21 Figure 4. Lake Britton water level elevation (amsl=above mean sea level) Draft Water Temperature and Water Quality Report 16 January 2013

22 Figure 5. Daily average stream flow in Pit 3, 4, and 5 reaches of the Pit River Draft Water Temperature and Water Quality Report 17 January 2013

23 3.2.3 Pit 4 Reach Releases from Pit 4 Dam to the Pit 4 Reach (as measured at Gage PH-30), during the 2012 monitoring period (June through September) ranged from 399 to 429 cfs (Table 6). Average flow for the monitoring period was 418 cfs (Figure 5) Pit 5 Reach Releases from Pit 5 Dam to the Pit 5 Reach (as measured at Gage PH-27), during the 2011 monitoring period (June through September) ranged from 395 to 613 cfs (Table 6). Average flow for the monitoring period was 478 cfs (Figure 5). 3.3 LAKE BRITTON SYNOPTIC WATER QUALITY The results of the monthly water quality profiling in Lake Britton are presented in Appendix E Water Temperature Monthly water temperature profiles from the 2012 monitoring effort are compared in Figure 6. Thermal conditions in the epilimnion were driven by regional conditions (below normal runoff in the spring, and dry runoff throughout the monitoring period, mild meteorology during the June- July period). Conversely, the thermal structure of the metalimnion and hypolimnion are largely the result of release flows from the Pit 3 Powerhouse intake and instream flow release structure. The thermal structure in Lake Britton in June was already beginning to establish, exhibiting a moderate gradient of 5.3 C through the water column. Specifically, June water temperatures ranged from 14.5 to 19.7 C (Appendix E). This was different than the isothermal conditions observed in 2011 which resulted from the reservoir being in spill condition through May. July water temperatures exhibited the largest temperature range measured during the summer Draft Water Temperature and Water Quality Report 18 January 2013

24 Figure 6. Comparison of monthly water temperature profiles from Lake Britton near Pit 3 Dam Draft Water Temperature and Water Quality Report 19 January 2013

25 monitoring effort (6.5 C). Water temperatures through the water column ranged from 16.4 to 22.9 C, the warmest epilimnion temperatures were measured during this period (Appendix E). The July water temperature profile exhibited a more developed thermal structure, with an isothermal epilimnion extending from the surface to three meters, a weakly-developed metalimnion from three to five meters, and a hypolimnion below five meters(appendix E). The August water temperature profile exhibited a thermal structure similar to July, with an isothermal epilimnion extending from the surface to five meters, a weakly-developed metalimnion from five to six meters, and an isothermal hypolimnion below six meters(appendix E). Profile water temperatures in August ranged from 17.0 to 22.1 C, the warmest hypolimnion temperatures were measured during this period (Appendix E). As indicated by data from the September profile, the thermal structure of Lake Britton was beginning to breakdown by the end of the summer (Appendix E). The epilimnion was less strongly isothermal, extending to three meters, a very weak metalimnion extending to five meters, and a non-isothermal hypolimnion below five meters. Overall water temperatures were also beginning to cool, ranging from 14.3 to 18.0 C, in spite of the comparatively hot conditions observed during September (Appendix E). The summer (June-September) water temperature profiles indicate that the hypolimnion in Lake Britton is not isothermal, exhibiting a consistent decrease in temperature throughout the hypolimnetic region during all periods Dissolved Oxygen Monthly DO profiles from the 2012 monitoring effort are compared in Figure 7. The 2012 DO concentrations largely reflected the thermal structure present during sampling. During all periods, DO levels in the hypolimnion exhibited low concentrations at the transition from the metalimnion and an increasing trend in the lower depths. The increase in DO in the lower hypolimnion may be related to the entrainment of colder (high DO) waters originating from Burney Creek which enters Lake Britton near the dam. As indicated in Figure 7, DO levels during all periods exhibited similar behavior indicative of a stable inflow conditions and established thermal structure. DO levels in the June profile ranged Draft Water Temperature and Water Quality Report 20 January 2013

26 Figure 7. Comparison of monthly dissolved oxygen profiles from Lake Britton near Pit 3 Dam Draft Water Temperature and Water Quality Report 21 January 2013

27 from 7.5 to 10.0 mg/l (Appendix E). The July profile exhibited a strong increase in DO levels through the first four meters, and then a rapid decline reaching a minimum at 12 meters. DO levels through the remainder of the July profile increased and the overall profile ranged from 7.1 to 9.4 mg/l (Appendix E). The August DO profile exhibited relatively constant levels through the first six meters, mirroring the thermal structure (Appendix E). DO levels declined through the metalimnion to a minimum level occurring at 13 meters. Levels then exhibited a strong increase through the remainder of the hypolimnion. The August profile exhibited DO levels ranging from 6.7 to 10.0 mg/l (Appendix E). The September profile exhibited an increase in DO levels through the first four meters, and then a decline reaching a minimum level at 12 meters. September DO levels increased through the remainder of the hypolimnion and the entire profile ranged from 7.4 to 9.6 mg/l (Appendix E). 3.4 RIVER REACH SYNOPTIC WATER QUALITY The results of the 2012 synoptic water quality monitoring are presented in Table 7. Sampling occurred each month from June September and was performed at all sites on the same day, between the hours of 9:00 and 15: Water Temperature Synoptic water temperature in the Pit River downstream of Pit 3 Dam (PR2) ranged from 14.8 to 17.6 C for the 2012 June through September period (Table 7). Synoptic water temperature in the Pit 4 Reach (Stations PR7 and PH-30) ranged from 16.6 to 20.0 C for the same 2012 period (Table 7). Water temperatures in the Pit 5 Reach (at PH-27) ranged from 17.7 to 21.1 C (Table 7). The synoptic water temperature data were collected primarily to provide snap-shot monthly validation and calibration data for the telemetry monitoring systems deployed at the four real-time monitoring stations (PG&E 2008b). A complete evaluation of the performance of the telemetry systems in comparison to the synoptic and continuous recorders deployed at the same locations as part of the summer monitoring effort will be presented in Section 4. Draft Water Temperature and Water Quality Report 22 January 2013

28 Table 7. Results of 2012 Pit 3, 4, and 5 Project in situ water quality monitoring in the Pit River. Water Dissolved Oxygen Station Temperature Level Saturation ID Date Time ( C) (mg/l) (%) Instrument Field Notes PR2 06/12/ Hydrolab MS5 IFR 1, water clear, mild and clear Pit 3 Reach 07/12/ Hydrolab MS5 IFR, water clear, hot and clear 08/08/ Hydrolab MS5 IFR, water clear, hot and clear 09/20/ Hydrolab MS5 IFR, water clear, mild and clear PR7 06/12/ Hydrolab MS5 IFR, water clear, mild and clear Pit 4 Reach 07/12/ Hydrolab MS5 IFR, water clear, hot and clear 08/08/ Hydrolab MS5 IFR, water clear, hot and clear 09/19/ Hydrolab MS5 IFR, water clear, mild and clear PH-30 06/12/ Hydrolab MS5 IFR, water clear, mild and clear Pit 4 Reach 07/12/ Hydrolab MS5 IFR, water clear, hot and clear 08/08/ Hydrolab MS5 IFR, water clear, hot and clear 09/19/ Hydrolab MS5 IFR, water clear, mild and clear PH-27 06/12/ Hydrolab MS5 IFR, water clear, mild and clear Pit 5 Reach 07/12/ Hydrolab MS5 IFR, water clear, hot and clear 08/08/ Hydrolab MS5 IFR, water clear, hot and clear 09/19/ Hydrolab MS5 IFR, water clear, mild and clear 1 IFR = Instream Flow Release, flows were under regulation of the diversion facility. Draft Water Temperature and Water Quality Report 23 January 2013

29 3.4.2 Dissolved Oxygen DO levels throughout the project were relatively constant between reaches during the period June through September DO levels in the Pit River downstream of Pit 3 Dam (PR2) ranged from 9.5 to 9.7 mg/l for the 2012 June through September period. DO saturation levels for Station PR2 ranged from 106 to 110 percent (Table 7). DO levels in the upper portion of the Pit 4 Reach (as defined by Stations PR7 and PH-30) ranged from 9.2 to 9.6 mg/l for the 2012 June through September period. DO saturation levels for both stations ranged from 105 to 113 percent (Table 7). DO levels in the Pit 5 Reach (as defined by conditions at PH-27) ranged from 9.0 to 9.4 mg/l for the 2012 June through September period. DO saturation levels for Station PH-27 ranged from 104 to 108 percent (Table 7). 3.5 CONTINUOUS WATER TEMPERATURE MONITORING Results of the continuous water temperature monitoring are summarized in Table 8. A complete summary of the 15-minute interval data is included in Appendix F Pit 3 Reach Station PR2 was located approximately 0.20 miles downstream of the Pit 3 instream flow release structure (at the Pit 3 Dam). This station represents initial conditions in the Pit 3 Reach, and is intended as data backup and performance verification of the telemetry system installed at the release. Mean daily water temperatures at PR2 for the period June 1 through September 30 ranged from 14.1 to 17.2 C (Table 8). The maximum hourly average temperature (17.5 C) occurred on August 7, 2012 (Appendix F). The thermal regime at this station is the result of releases from the deeper hypolimnion of Lake Britton. As a result, the diel range in temperatures Draft Water Temperature and Water Quality Report 24 January 2013

30 Table 8. Summary of 2012 Pit 3, 4, and 5 Project continuous water temperature monitoring in the Pit River. Water Temperature ( C) Daily Average 2 Diel Temperature Range 3 Station / Hourly Average 1 Maximum Minimum Monthly Monthly Data Reach Month Maximum Minimum Daily Average Daily Average Mean Maximum Minimum Mean Days PR-2 / June Pit 3 Reach July August September PR-7 / June Pit 4 Reach July August September PH-30 / June Pit 4 Reach July August September PH-27 / June Pit 5 Reach July August September Presents the maximum and minimum hourly average for each month based on the 15-minute instantaneous readings. 2 Presents the maximum, and minimum daily average values, and the mean for each month based on hourly average readings. 3 Presents the maximum, minimum, and mean for each monthly of diel temperature range. Diel range is defined as the difference between the hourly average maximum and minimum for each day. Draft Water Temperature and Water Quality Report 25 January 2013

31 is small, with average diel fluctuations ranging from 0.2 to 0.6 C (Table 8). Figure 8 presents daily maximum, minimum, and mean water temperature from Station PR Pit 4 Reach Station PR7 was located approximately 0.15 miles downstream of the Pit 4 instream flow release structure (at the Pit 4 Dam). This station represents initial conditions in the Pit 4 Reach, and is intended as data backup and performance verification of the telemetry system installed at the release. Mean daily water temperatures at PR7 for the period June 1 through September 30 ranged from 15.8 to 19.9 C (Table 8). The maximum hourly average temperature (20.6 C) occurred on July 11, 2012 (Appendix F). The thermal regime at this station is the result of the combined flows from Pit 3 Powerhouse and the Pit 3 Reach. The diel range at this station was larger than PR2, with the average diel temperature fluctuations ranging from 0.6 to 1.9 C (Table 8). Figure 9 presents daily maximum, minimum, and mean water temperature from Station PR7. The PH-30 station is located approximately 1.3 miles downstream of Pit 4 Dam. This station is co-located with the telemetry station installed at PH-30, and is intended as data backup and performance verification of the telemetry system. The results of the performance verification are presented in Section 4.4. Water temperatures at this station were similar to those measured at PR7. Mean daily water temperatures at PH-30 for the period June 1 through September 30 ranged from 15.8 to 20.0 C (Table 8). The maximum hourly average temperature (20.6 C) occurred on July 11, 2012 (Appendix F). The diel cycle at this station, ranged from 0.3 to 1.3 C (Table 8). Figure 10 presents daily maximum, minimum, and mean water temperature from Station PH Pit 5 Reach The PH-27 station is located approximately 4.0 miles downstream of Pit 5 Dam. This station is co-located with the telemetry water temperature station installed at PH-27. This station is Draft Water Temperature and Water Quality Report 26 January 2013

32 Figure 8. Daily maximum, minimum, and average water temperatures below Pit 3 Dam (Station PR2) Draft Water Temperature and Water Quality Report 27 January 2013

33 Figure 9. Daily maximum, minimum, and average water temperatures below Pit 4 Dam (Station PR7) Draft Water Temperature and Water Quality Report 28 January 2013

34 Figure 10. Daily maximum, minimum, and average water temperatures at Pit 4 reach flow gage (Station PH-30) Draft Water Temperature and Water Quality Report 29 January 2013

35 intended as data backup and performance verification of the telemetry system. Mean daily water temperatures at PH-27 for the period June 1 through September 30 ranged from 15.7 to 20.2 C (Table 8). While daily average water temperatures in the Pit 5 Reach were cooler than those in the Pit 4 Reach, the highest hourly temperature was recorded at Station PH-27. A maximum hourly average temperature of 21.7 C occurred on July 24, and August 5, 2012 at this station (Appendix F). This is probably related to this station being located in the middle of the bypass reach which experiences a larger diel range than stations located downstream of a dam. The diel temperature fluctuation at PH-27 ranged from 1.7 to 3.8 C (Table 8). Figure 11 presents daily maximum, minimum, and mean water temperature from Station PH Comparison of Water Temperatures in Project Reaches Figure 12 compares mean daily water temperatures from each station monitored in 2012 with mean daily air temperature from the Pit 3 Intake Meteorological station. As indicated, mean daily water temperatures in the Pit 3 Reach are significantly cooler than those measured in the other two reaches. Mean daily temperatures from the two stations in the Pit 4 Reach were similar due to their relatively close proximity to each other. Conditions in the upper Pit 4 Reach (PH-30) were the warmest of the three reaches, as defined by mean daily water temperatures (Appendix F). Figure 12 also illustrates the general response of water temperature to ambient meteorological conditions. Conditions measured at Station PR2 exhibit little response to changes in ambient air temperatures. The source of waters measured at Station PR2 is the hypolimnion of Lake Britton, which is relatively thermally isolated from short-term meteorological trends. The two stations in the Pit 4 Reach exhibit slightly stronger responses to ambient conditions than the Pit 3 Reach. This is due to their location downstream of a small reservoir which is less thermally isolated due to its relatively short retention time, and minimally developed vertical thermal gradients (PG&E relicensing document). The Pit 5 Reach exhibited the strongest response to ambient conditions, due to its location midway through the reach, which allows for longer exposure of surface flows to diel thermal cycles. Draft Water Temperature and Water Quality Report 30 January 2013

36 Figure 11. Daily maximum, minimum, and average water temperatures at Pit 5 reach flow gage (Station PH-27) Draft Water Temperature and Water Quality Report 31 January 2013

37 Figure 12. Comparison of daily average water temperature from the Pit 3, 4, and 5 Reaches with mean daily air temperatures from Pit 3 Intake. Draft Water Temperature and Water Quality Report 32 January 2013

38 3.6 LAKE BRITTON ALGAE BLOOM MONITORING The visual assessment for the presence/absence of algae blooms was conducted monthly in 2012 from June through September. Results of this monitoring are presented in Table 9. A complete photographic record of the monitoring effort is included in Appendix G. The monthly monitoring effort identified the presence of algae in concentrations indicative of a full scale bloom during the August 9 site visit (Table 9). During this survey, concentrations of the cyanobacteria species associated with algae blooms on Lake Britton were observed in concentrations high enough to produce a thick surface emulsion. The highest concentrations were observed in the area around the Dusty Campground, Jamo Point boat ramp and Pines Picnic area, extending downstream toward the Clark Creek arm in reduced concentration. There was visual evidence of elevated concentrations at all the other observation stations, at much reduced levels. Based on the 2012 field observations, blue-green algae in Lake Britton was observed at nuisance concentrations only during the August site visit. 4.0 DISCUSSION In this section, results of monitoring data collected under the current license required flow regime will be compared with available data from previous monitoring efforts. In general the data comparison will be limited to the hottest months of the summer (July and August) It should be noted that 2012 is the second year of water quality monitoring under the current license requirements, and the comparison of results with historical data is limited by the small data set. 4.1 LAKE BRITTON WATER QUALITY Lake Britton has a comparatively short residence time (estimated at 8-10 days), however, the residence period is long enough to generate both longitudinal and vertical gradients in water quality within the reservoir (PG&E 2001b). Near the dam, the water quality gradient is largely driven by the vertical thermal structure. Due to the latent effect of resident time on water quality, conditions in July and August are defined by ambient conditions (meteorological, Draft Water Temperature and Water Quality Report 33 January 2013

39 Table 9. Summary of visual assessment of algae blooms in Lake Britton during 2012 monitoring effort. Photo June 14, 2012 July 13, 2012 Point Location Shore Clarity Algae Abundance 1 Clarity Algae Abundance 1 1 Upstream of Pit 3 Intake North Good (pollen) Absent 0 Good Green 0 2 South Shore ferry crossing inlet South Good (pollen) Absent 0 Good Green 0 3 McArthur-Burney Falls State Park - Marina Dock South Excellent (pollen) Absent 0 Good Green 0 4 McArthur-Burney Falls State Park - Swim Area South Excellent (pollen) Absent 0 Good Green 0 5 McArthur-Burney Falls State Park - off point South Excellent (pollen) Absent 0 Good Green 0 6 Dusty Camp North Good (pollen) Absent 0 Fair Green 0 7 Jamo Point Boat Ramp - Fishing Platform North No Access Good Green 0 8 Pines Picnic Area North No Access Good Green 0 9 North Shore Campground - Swim Cove North No Access No Access North Shore Campground - Point North No Access No Access Clark Creek arm North Clear Absent 0 Good BG/Grn 1 1 Abundance = Relative abundance based on visual assessment, assigned the following values based on this assessment 0 = No algae visually observed 1 = Suspected blue-green algae species observed, numbers very limited 2 = Suspected blue-green algae species observed, concentration is accumulations that are visibly distinct, no formation of a film. 3 = Suspected blue-green algae species observed in moderate concentrations, some areas show accumulations that generate surface "film" 4 = Full scale bloom - moderate coverage, primarily limited to near shore areas, film/mats formed in sheltered areas. 5 = Full scale bloom - significant coverage on reservoir, mats formed in all areas NA = Not accessible, area closed Draft Water Temperature and Water Quality Report 34 January 2013

40 Table 9. Summary of visual assessment of algae blooms in Lake Britton during 2012 monitoring effort (continued). Photo August 9, 2012 September 20, 2012 Point Location Shore Clarity Algae Abundance 1 Clarity Algae Abundance 1 1 Upstream of Pit 3 Intake North Good BG/Grn 2 Good Green 0 2 South Shore ferry crossing inlet South Good BG/Grn 1 Good Green 0 3 McArthur-Burney Falls State Park - Marina Dock South Good BG/Grn 2 Good Green 0 4 McArthur-Burney Falls State Park - Swim Area South Good BG/Grn 2 Good Green 0 5 McArthur-Burney Falls State Park - off point South Good BG/Grn 2 Good Green 0 6 Dusty Camp North Fair BG/Grn 4 Good Green 0 7 Jamo Point Boat Ramp - Fishing Platform North Good BG/Grn 3 Fair Green 0 8 Pines Picnic Area North Fair BG/Grn 4 Fair Green 0 9 North Shore Campground - Swim Cove North No Access No Access North Shore Campground - Point North No Access No Access Clark Creek arm North Good BG/Grn 2 Good Green 0 1 Abundance = Relative abundance based on visual assessment, assigned the following values based on this assessment 0 = No algae visually observed 1 = Suspected blue-green algae species observed, numbers very limited 2 = Suspected blue-green algae species observed, concentration is accumulations that are visibly distinct, no formation of a film. 3 = Suspected blue-green algae species observed in moderate concentrations, some areas show accumulations that generate surface "film" 4 = Full scale bloom - moderate coverage, primarily limited to near shore areas, film/mats formed in sheltered areas. 5 = Full scale bloom - significant coverage on reservoir, mats formed in all areas NA = Not accessible, area closed Draft Water Temperature and Water Quality Report 35 January 2013

41 hydrologic, and operational regimes) present during previous periods. These issues combine to make the comparison of profile data between monitoring years difficult, and interpreting differences between monitoring years somewhat subjective Lake Britton Thermal Structure As outlined in the Plan (PG&E 2008b), Lake Britton water temperature profiles were compared with those from previous monitoring efforts. Data from past monitoring efforts were selected such that the closest possible date to the 2012 effort were used for the comparison. Figure 13 compares the 2012 July water temperature profile with those from 2000, 2002, and As indicated, the structures of the epilimnion were variable between years, reflecting the strong influence associated with differences in ambient conditions (air temperature, relative humidity, wind speed and direction, and inflow rates). The thermal structure of the metalimnion were similar, with temperatures in the same general range through this area of the water column. Water temperatures in the hypolimnion were also variable, with temperatures observed in 2000 and 2002 being less than 16.5 C, compared with those measured in which were above 16.5 C (Figure 13). Figure 14 compares the 2012 August water temperature profile with those from 2000, 2002, and As with July, the structure of the August epilimnion were variable between years. Temperatures in the metalimnion of the August profile were warmer than those in either the 2000 or 2002 August profiles. The August hypolimnion temperatures were also warmer than those measured in both 2000 and Water temperatures in the hypolimnion in the 2000 and 2002 profiles were less than 16.5 C, compared with which were above 17.0 C (Figure 14). The difference in thermal structure observed in the hypolimnion in 2011 and 2012 monitoring efforts compared with historical profile data is assumed related to the increased withdrawal of cooler water from the hypolimnion under the current license-required flow regime. The current June-August Pit 3 Reach minimum instream flow release specified under the new license is 300 cfs, compared with 150 cfs under the previous license (i.e., 2000 and 2002). Draft Water Temperature and Water Quality Report 36 January 2013

42 Figure 13. Comparison of the July 2012 water temperature profile with those from June 2000, and July 2002, Draft Water Temperature and Water Quality Report 37 January 2013

43 Figure 14. Comparison of the August 2012 water temperature profile with those from July 2000, and August 2002, and Draft Water Temperature and Water Quality Report 38 January 2013

44 4.1.2 Lake Britton Dissolved Oxygen As outlined in the Plan (PG&E 2008b), the July and August 2012 Lake Britton dissolved oxygen profiles were compared with those from previous monitoring efforts. Figure 15 compares the 2012 July DO profile with those from 2000 and DO levels in the July 2011 and 2012 profiles exhibited very different patterns compared with the 2000 profile. DO levels in 2000 near the bottom of the hypolimnion exhibited lower concentrations than those observed in 2011 and DO levels throughout the water column in each profile were within normal aerobic ranges. August DO levels are compared in Figure 16 for profiles from 2000, 2002, 2011 and The pattern of DO distribution in each profile is similar for the 2011 and 2012; with highest concentrations near the surface, concentrations declining through the metalimnion, and increasing in the hypolimnion. In comparison the 2000 and 2002 profiles exhibit similar structure, with the most noticeable difference between the profile being the continuous decline in DO levels through the lower hypolimnion. 4.2 PIT RIVER WATER QUALITY Water Temperature As outlined in the Plan (PG&E 2008b), the results of the 2012 water temperature monitoring in the river reaches were compared with those from previous monitoring efforts. For the purposes of this analysis, only data from July and August were compared. These months represent the period of peak water temperature and are also the most consistent between years with regard to the influence of stream flow and ambient meteorology. Mean daily water temperatures from the 2012 monitoring effort were compared with available data from previous monitoring efforts. These data sets were evaluated with regard to distribution of water temperatures at each station. These values are expressed as categories representing 10, 25, 50, 75, 90 percent exceedance. The results of this evaluation are summarized in Table 10, and discussed by stream reach in the following sections. Figures 17 and 18 present the results of this evaluation by comparing the selected exceedance values (10, 50, 90 percent exceedance) from the available historical data set with the 2012 data for each reach. Draft Water Temperature and Water Quality Report 39 January 2013

45 Figure 15. Comparison of the July 2012 dissolved oxygen profile with the June 2000 and July 2011 profiles. Draft Water Temperature and Water Quality Report 40 January 2013

46 Figure 16. Comparison of the early August 2012 dissolved oxygen profile with those from July 2000, and August 2002 and Draft Water Temperature and Water Quality Report 41 January 2013

47 Table 10. Comparison of historical water temperature data with 2012 monitoring results. July Mean Water Temperatures 1 Station PR2 -Pit 3 Reach PR7 - Pit 4 Reach PH27 - Pit 5 Reach Period , , Exceedance Rank ( C) ( C) ( C) ( C) ( C) ( C) ( C) ( C) ( C) 100% Minimum % 10% % 25% % 50% % 75% % 90% % Maximum August Mean Water Temperatures 1 Station PR2 -Pit 3 Reach PR7 - Pit 4 Reach PH27 - Pit 5 Reach Period , , Exceedance Rank ( C) ( C) ( C) ( C) ( C) ( C) ( C) ( C) ( C) 100% Minimum % 10% % 25% % 50% % 75% % 90% % Maximum Based on daily average temperatures. Draft Water Temperature and Water Quality Report 42 January 2013

48 Figure 17. Comparison of historic July water temperature data with results of July monitoring. Draft Water Temperature and Water Quality Report 43 January 2013

49 Figure 18. Comparison of historic August water temperature data with results of August monitoring. Draft Water Temperature and Water Quality Report 44 January 2013

50 Mean daily July water temperatures from Station PR2 from the period 1988 through 2007 (defined as the historical data period) were compared with those from 2011 and 2012 (PG&E ). As indicated in Table 10, median (50 percent exceedance) July water temperature in the Pit 3 Reach (as defined by Station PR2, representing initial conditions) in 2012 were 1.1 C warmer than those measured during the historical monitoring period. The data evaluation also indicates that the percent exceedance value (16.2 C) is equivalent to the 25 percent exceedance value (16.3 C) from the data set (Figure 17). This supports the finding from the 2011 monitoring effort, indicating a relatively strong shift in thermal regime in this portion of the Pit 3 Reach (Table 10). Median August conditions in the Pit 3 Reach under the current flow regime were 1.2 C warmer than those measured under the previous flow regime ( data set) (Table 10). The relationship between the distribution of water temperatures exhibited in July is present in August as well, with the percent exceedance value (16.3 C) being similar to the 10 percent exceedance value (16.4 C) from the data set (Figure 18) (Table 10). The data evaluation indicates a strong shift in thermal conditions in the Pit 3 Reach, in both July and August. Station PR2 is located near Pit 3 Dam, and as a result thermal conditions at this location are driven by conditions in the deeper waters of Lake Britton. Comparison of water temperatures profiles (Section 4.1.1) suggests that the new license-required flow regime has warmed water temperatures in the metalimnion-hypolimnion of Lake Britton in July and August. This is likely related to the rapid utilization of the cool water associated with Burney Creek in the hypolimnion, and the entrainment of warmer waters from the upper layers of the water column. The warming of the deeper waters of Lake Britton is reflected in warmer water temperatures measured in the upper Pit 3 Reach in Mean daily water temperatures from Station PR7 from the period / were compared with those from (PG&E , PGE 2001b, PG&E 2002b). As indicated in Table 10, median July 2012 water temperatures under the new flow regime were only 0.1 C warmer than median conditions under the previous flow regime (as defined by the / data set). The data also indicate that the range in temperatures defined by the / data set is larger than the range observed in 2011 and This Draft Water Temperature and Water Quality Report 45 January 2013

51 suggests that while median July water temperatures are slightly warmer, overall thermal conditions in the upper Pit 4 Reach under the new flow regime vary less and are within the range observed under the previous flow regime (Figure 17). Median August water temperatures in the Pit 4 Reach under the current flow regime are 1.1 C warmer than those measured under the previous flow regime (as defined by the / data set) (Table 10). This represents a larger change in the relationship between data sets than observed in the July data (Figure 18). This change may reflect the influence that the higher flow regime in the Pit 3 Reach has had on the thermal structure on Lake Britton. With the exception of the 2011 data, historical data equivalent to the PH-30 station monitored in 2012 are not available. The data indicate that water temperatures at this location are similar to those measured at Station PR7. Mean daily water temperatures from Station PH-27 from the period were compared with those from 2012 (Table 10) (PGE 2001b, PG&E 2002b). As indicated, the distribution of mean daily July water temperatures in 2012 in the Pit 5 Reach at Station PH-27 (mid-reach conditions) were similar to those measured during the historical monitoring efforts (as defined by the data set). Specifically, median July water temperatures in 2012 under the current flow regime were 0.2 C cooler than under the previous flow regime ( data sets) (Table 10). The range in water temperature defined by the data set is also larger than the range observed in In comparison, the median August conditions in the Pit 5 Reach under the current flow regime were 1.0 C warmer than those measured under the previous flow regime ( data sets) (Table 10). However, similar to July, the range in August water temperatures under the historic flow regime (defined by the ) is larger than the range observed in This suggests that while median August water temperatures were warmer, overall thermal conditions in the Pit 5 Reach under the new flow regime vary less and are within the range observed under the previous regime (Figure 18). Draft Water Temperature and Water Quality Report 46 January 2013

52 4.2.2 Dissolved Oxygen As outlined in the Plan (PG&E 2008b), the results of the 2012 DO monitoring in the river reaches were compared with those from previous monitoring efforts. (PG&E , PGE 2001b, PG&E 2002b). The results of this comparison are summarized in Table 11. Results of the 2012 monitoring effort indicate that DO levels were consistently higher than DO values from the historical monitoring period. Figure 19 compares by reach, DO levels from the 2012 monitoring effort with those from 2011 and the applicable historical data set. The Pit 3 Reach was the only river segment where the difference between average DO levels was greater than 1.0 mg/l. This increase in DO levels downstream of Pit 3 dam may be related to the higher licenserequired flow regime, which appears to be entraining waters with higher DO levels. The overall seasonal range in DO levels measured in 2012 were generally much smaller than those observed in 2011 and the historical period, however, all values were within the general range. Conclusions drawn from any comparison with historical data needed to be placed into the context of the time of day the samples were collected. The natural diel cycle can produce significant changes in DO concentrations through the day. The 2012 DO data were collected within a relatively narrow time frame, that was kept consistent between monitoring periods. The historical data represents DO concentrations collected over a wider time frame. The higher flow regime in all Project reaches will likely produce a smaller diel cycle when compared with historical periods, due to the reduction in travel time within the Project reaches. Percent DO saturation data were also evaluated, the results of this evaluation are also summarized in Table 11. Figure 20 compares DO saturation data from the 2012 monitoring effort with those from the applicable historical data set. These data further support the previous discussion that 2012 DO concentrations are slightly higher than previous monitoring periods, but within the same overall range. 4.3 COMPARISON OF 2012 RESULTS WITH BASIN PLAN OBJECTIVES Compliance objectives were defined using the CVRWQCB Water Quality Control Plan (Basin Plan) for the Sacramento River Basin, Fourth Edition, and revised October 2007 (CVRWQCB 2007) and specific objectives defined in the FERC license. Draft Water Temperature and Water Quality Report 47 January 2013

53 Table 11. Comparison of historical dissolved oxygen data with 2011 and 2012 monitoring results. Historic Flow Regime Current Flow Regime Current Flow Regime Level 1 Saturation 1 Level 1 Saturation 1 Level 1 Saturation 1 Station River Reach Statistic (mg/l) (%) (mg/l) (%) (mg/l) (%) PR2 Pit 3 Period Maximum % % % Minimum % % % Average % % % Sample Periods PR7 Pit 4 Period / Maximum % % % Minimum % % % Average % % % Sample Periods PH-27/PR16 Pit 5 Period Maximum % % % Minimum % % % Average % % % Sample Periods Based on synoptic in-situ monitoring results. Draft Water Temperature and Water Quality Report 48 January 2013

54 Figure 19. Comparison of historic dissolved oxygen level data with results of in situ monitoring. Draft Water Temperature and Water Quality Report 49 January 2013

55 Figure 20. Comparison of historic dissolved oxygen saturation data with results of in situ monitoring. Draft Water Temperature and Water Quality Report 50 January 2013

56 4.3.1 Water Temperature For purposes of the compliance evaluation, daily average water temperatures were compared with the 20 C threshold identified in Condition 13 of the State Water Boards 401 Certification for the Pit 3, 4, and 5 Project. If daily average water temperatures at either PH-30 or PH-27 exceed 20 C, the Deputy Director of the State Water Board must be notified. The data of record for compliance purposes is obtained using the permanent data-loggers installed at station PH-30 and PH-27. The compliance information for the 2012 water year was transmitted to the State Water Board via PG&E letter dated December 20, Information presented in the letter will not be restated as part of this document. Based on the data from the seasonally installed temperature recorders, water temperatures greater than 20 C were not measured in the Pit 3 reach during the 2012 monitoring period (June through September) (Appendix F). Daily average water temperatures exceeding 20 C were measured in the Pit 4 Reach (at PH-30) for one day, and in the Pit 5 Reach (at PH-27) for four days (Appendix F). Any differences between the number of exceedance days reported by the seasonal recorders and those of the official compliance data-loggers is the result of slight differences in instrument accuracy and calibration Dissolved Oxygen The results of the 2012 DO monitoring effort were compared with applicable Basin Plan objectives. All DO concentrations measured in 2012 in Project-affected waters were above applicable Basin Plan Objectives (WARM, COLD and SPWN) during all periods (Table 7). 4.4 VALIDATION OF TELEMETRY MONITORING SYSTEM As per the requirements outlined in the Plan (PG&E 2008b), the results of the synoptic water temperature monitoring were compared with the output from both the in situ data-logger and the real-time telemetry system from both PH-30 and PH-27. The results of this analysis are presented in Table 12. As indicated, the difference between all three sources was minimal, Draft Water Temperature and Water Quality Report 51 January 2013

57 Table 12. Performance validation of telemetry systems. Synoptic In-Situ Telemetry Sample Data Logger 1 System 2 Standard Station ID Station Description Date Time ( C) ( C) ( C) Deviation PH-30 Pit River - Pit 4 Reach 06/12/ at PH-30 Flow Gage 07/12/ /08/ /19/ PH-27 Pit River - Pit 5 Reach 06/12/ at PH-27 Flow Gage 07/12/ /08/ /19/ Instantaneous reading from 15-minute interval closest to the synoptic sampling. 2 Instantaneous reading from 30-minute interval closest to the synoptic sampling. Draft Water Temperature and Water Quality Report 52 January 2013

58 ranging from 0.0 to 0.2 C, and averaging 0.1 C. This is within the range of defined instrument error (±0.1 C). 4.5 LAKE BRITTON ALGAE BLOOMS The first occurrence of a nuisance algae bloom in Lake Britton was documented in 2002 (PG&E 2003b). Although algae blooms are a natural phenomenon, the magnitude and duration of this particular bloom prompted PG&E to collect and evaluate water samples (PG&E 2003b). Based on the samples collected in 2002, the dominant species composition of the bloom was identified as Gloeotrichia sp., a filamentous cyanobacteria (blue-green algae). Another species of cyanobacteria (Aphanizomenon sp.) was also abundant in the samples (PG&E 2003b). When present these species create a bloom with a characteristic reddish-olive green film on the water surface. Since the 2002 occurrence, a number of other blooms have been observed with similar visual characteristics (Sagraves per. obs. 2007). Algae blooms are natural phenomena, which occur regularly in aquatic systems. Generally, bloom development is triggered by light, temperature, ph, and nutrient concentrations. An oversupply of nutrients, especially phosphorous and nitrogen compounds, will often result in excessive growth of blue-green algae (Hutchinson, 1967). Certain algae species are noted to follow seasonal periodicity. Gloeotrichia, for instance, is generalized as an autumnal annual (vegetative development in the late spring and bloom in late summer to autumn) (Transeau 1916). The life cycle of Gloeotrichia is complex, and identifying the causative agent responsible for each bloom would be difficult, as it may be different each year. In 2012, Gloeotrichia was observed in significant concentrations only in August. Based on the timing of previous blooms (maximum concentrations in July-August), this would be considered a normal event. Conditions in 2012 that may have influenced algae production in Lake Britton included, low inflow during the spring, and excellent water clarity (low turbidity) during the entire summer period. It is not possible to determine cause and effect from the limited data available. Draft Water Temperature and Water Quality Report 53 January 2013

59 5.0 RECOMMENDATIONS No clarifications, refinements to monitoring methods, or proposed amendments to the Plan, are made at this time. 6.0 REFERENCES California Data Exchange Center (CDEC) California Data Exchange Center ( Department of Water Resources. California Regional Water Quality Control Board, Central Valley Region (CVRWQCB) 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. Hutchinson, G.E A Treatise on Limnology. Vol. 2. Introduction to lake biology and the limnoplankton. Wiley and Sons, New York p. Pacific Gas and Electric Company (PG&E) Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1987 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1988 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1989 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1990 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1991 Annual Report. Pacific Gas and Electric Company, San Ramon, California. Draft Water Temperature and Water Quality Report 54 January 2013

60 PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1992 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1993 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1994 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1995 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1996 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1997 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1998 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 1999 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2000 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E. 2001b. Pit 3, 4, and 5 Exhibit E2, Water Use and Quality. In Pit 3, 4, and 5 Project, FERC No Application for New License, Final. Submitted to the Federal Energy Regulatory Commission, October PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2001 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E. 2002b. Pit 3, 4, and 5 High Flow Test Monitoring. Unpublished data. Draft Water Temperature and Water Quality Report 55 January 2013

61 PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2002 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E. 2003b. Lake Britton Algal Identification Report. Pacifica Gas and Electric Company, Technical and Ecological Services, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2003 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2004 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2005 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2006 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E Pit 3, 4, and 5 Project Biological Compliance Monitoring Program 2007 Annual Report. Pacific Gas and Electric Company, San Ramon, California. PG&E. 2008b. Water Temperature and Water Quality Monitoring Plan, for Pacific Gas and Electric Company s Pit 3, 4, and 5 Hydroelectric Project (FERC No. 233). October 2008 Final Plan. Pacific Gas and Electric Company, Environmental Services. PG&E. 2011a. Hydrological database provided by Map-View Query Guided Map Interface, Computer and Telecommunication Services, Pacific Gas and Electric Company. PG&E. 2011b. Pacific Gas and Electric Company s Quality Assurance Program Plan (QAPP), Report No Version 5; February 1, Prepared by Land and Environmental Management, San Ramon, California. Sagraves, T Personal Observation, ATC Associates, Red Bluff, California. Transeau, E.N The periodicity of fresh water algae. Amer. Jour. Bot. 3: Draft Water Temperature and Water Quality Report 56 January 2013

62 United States Geological Survey (USGS) United States Geological Survey, California Water Science Center Pit River below Pit No.1 PH near Fall River Mills, California. ( Draft Water Temperature and Water Quality Report 57 January 2013

63 APPENDIX A LICENSE REQUIREMENT AND PLAN OBJECTIVES Draft Water Temperature and Water Quality Report January 2013

64 APPENDIX A LICENSE REQUIREMENTS AND PLAN OBJECTIVES License Requirements The State Water Board 401 Certification for the Pit 3, 4, and 5 Project states: Condition The Licensee shall install water temperature monitors (i.e., telemetered, real time, year-round) at stream gage PH 30 in the Pit 4 Reach and at stream gage PH 27 in the Pit 5 Reach. Licensee shall immediately notify the Deputy Director if average daily water temperature at either of these locations exceeds 20 C. Licensee shall provide yearly reports of water temperature recorded at these locations by December 30 of each year with data from the previous water year (September to October) to the Deputy Director. The report shall include raw temperature data, mean daily temperatures, and daily maximum and minimum temperatures. Mitigation Measure 2: Water Temperature and Water Quality Monitoring Plan PG&E shall develop and implement a water temperature and water quality monitoring plan, including monitoring during months when temperatures could be limiting to aquatic biota, which for most species is from June through September. The Plan should help define parameters that would optimize foothill yellow-legged frog reproduction, which typically occurs during the spring, and would serve as a basis for establishing the timing of spring freshet flow releases. Therefore, during the spring, PG&E shall monitor temperature at known or potential foothill yellow-legged frog habitat locations. Taking spot dissolved oxygen (DO) measurement and periodic water temperature and DO profiles in Lake Britton near the Pit 3 Dam during high temperature low flow conditions (which typically occur during July and August), along with monitoring water temperature in the river reaches, will provide a basis for documenting that Project operations comply with water quality objectives. This plan shall be developed in consultation with the FS, FWS, CDFG, U.S. Environmental Protection Agency (EPA), and State Water Board, and submitted to the Deputy Director for approval. The approved plan must be submitted to FERC within one year of license issuance. The plan shall include the following: A. The location of stations in each reach at which water temperature will be monitored; B. The time frame during which water temperature will be monitored at each station; Draft Water Temperature and Water Quality Report A-1 January 2013

65 C. The type of instrumentation, frequency of data collection, and calibration procedures that will be used to monitor water temperature and DO; D. Temperature conditions that will trigger spot DO measurements at specific stations; E. Potential Project operational procedures that could be implemented to maintain Project waters at or below 20 degrees C (68 degrees F) and identification of circumstances that would trigger implementation of those procedures. If monitoring shows water temperature exceeding 20 degrees C, it may be possible to temporarily modify Project operations to maintain cooler water in the affected reach; F. A schedule for installation of water temperature monitoring equipment (to be completed no later than six months after submission of the plan to FERC); and G. Procedures to report monitoring results to the State Water Board, other resource agencies, and FERC. USDA-FS 4(e) Condition 22 states: Condition No Water Quality and Temperature Monitoring Plan for Affected NFSL The Licensee shall within one year of license issuance develop a water quality monitoring plan to assess the effects of new instream flows on water quality in project reservoirs and project affected river reaches on National Forest System Lands (NFSL). The water quality monitoring plan elements shall at a minimum include but not necessarily be limited to: Continuous water temperature monitoring, Periodic measurements of dissolved oxygen, Periodic Lake Britton temperature and dissolved oxygen profiles, Documentation of procedures used to meet water-related Best Management Practices (BMPs). The Licensee shall prepare the plan after consultation with the Forest Service, State Water Resources Control Board, California Department of Fish and Game, and U.S. Fish and Wildlife Service. The Licensee shall include with the plan documentation of agency consultation, copies of comments and recommendations of the completed plan after it has been prepared and provided to agencies, and specific description of how agencies comments are accommodated by the plan. Draft Water Temperature and Water Quality Report A-2 January 2013

66 Goals And Objectives Telemetered, Real Time, Year Round Water Temperature Monitoring The goals and objectives of the telemetered, real time, year round water temperature monitoring include: Install telemetered water temperature monitoring equipment (transducers and data loggers) at two License required (State Water Board 401 Condition 13) locations at stream gage PH-30 in the Pit 4 Reach and at stream gage PH-27 in the Pit 5 Reach, and at two additional locations (not required by State Water Board 401 Condition 13) at Pit 3 Dam and at Pit 4 Dam as agreed to by PG&E and the Technical Review Group (TRG), which includes the USDA-FS, State Water Board, California Department of Fish and Game (CDFG), U. S. Fish and Wildlife Service (USFWS), National Park Service (NPS), Tribal Governments, non-governmental organizations (NGOs), and other stakeholders; Immediately notify the State Water Board Deputy Director if average daily water temperature exceeds 20 C at PH-30 and PH-27 in the Pit 4 and Pit 5 reaches, respectively; Provide yearly reports of water temperature recorded at all four of these locations by December 30 of each year with data from the previous water year (September to October) to the State Water Board Deputy Director and to the USDA-FS; Include raw water temperature data, mean daily water temperatures, and daily maximum and minimum water temperatures in the yearly reports; and Identify potential approach(es) that could be implemented in the event that daily mean water temperatures at the telemetered stations in the Pit 4 and Pit 5 reaches exceed the 20 C water temperature criteria. Summer Monitoring The primary goal of the summer monitoring is to conduct water quality monitoring and water temperature monitoring during months when water temperatures could be limiting to aquatic biota, which for most species is from June through September as required by the State Water Board 401 Mitigation Measure 2 and USDA-FS 4(e) Condition 22 of the Project License. Specific objectives of the summer monitoring include: Periodically collect dissolved oxygen (DO) and water temperature profiles in Lake Britton near Pit 3 Dam under the new license conditions and help confirm that Project operations meet water quality standards for DO near Pit 3 Dam under new minimum instream flows at the warmest time of the year (typically July and August); Conduct visual assessment surveys for the presence/absence of algal blooms on Lake Britton during the summer months once the new minimum instream flows have been achieved; Draft Water Temperature and Water Quality Report A-3 January 2013

67 Collect spot measurements for in situ DO and in situ water temperature at or near the four telemetered monitoring sites each month during the summer (in situ water temperature data will provide snap-shot monthly validation and calibration data for the data loggers and transducer data); Monitor summer water temperatures (June 1 to September 30) in Project bypass reaches (Pit 3 Dam, Pit 4 Dam, PH-30 on Pit 4 Reach, and PH-27 on Pit 5 Reach) to assess the effects of both the flow regime specified in the license and Project operations on aquatic biota. This objective will be met by using data obtained from the telemetered water temperature monitoring station equipment mentioned in the section above (i.e., data logger data); Provide a record (table) in the annual report of mean, minimum, and maximum water temperatures for Pit 3 Dam, Pit 4 Dam, PH-30 (Pit 4 Reach), and PH-27 (Pit 5 Reach) by month, and include duration of maximum water temperatures (e.g., how many 30-minute intervals exceed 20 C each day by month during the summer); Supplement and support water temperature data collected under the Foothill Yellow- Legged Frog (FYLF) Monitoring Study Plan and the Aquatic Mollusc Monitoring Plan with water temperature data collected as part of this study; Provide documentation of procedures that could be used to meet water-related BMPs associated with Project operations and maintenance (O&M). Draft Water Temperature and Water Quality Report A-4 January 2013

68 APPENDIX B METHODS AND QA/QC DOCUMENTS Draft Water Temperature and Water Quality Report January 2013

69 APPENDIX B METHODS AND QA/QC DOCUMENTS Water Temperature Data Logger Service Log Datalogger Information Date Action Station S/N Type Status 5/17/2012 Installed PR2 T3600 Starmon Mini -- 5/17/2012 Installed PR4 T3599 Starmon Mini -- 5/17/2012 Installed PR7 T3602 Starmon Mini -- 5/17/2012 Installed PH30 T2523 Starmon Mini -- 5/17/2012 Installed PR14 T3604 Starmon Mini -- 5/17/2012 Installed PH27 T3605 Starmon Mini -- 6/12/2012 Service PR2 T3600 Starmon Mini No issues 6/12/2012 Service PR4 T3599 Starmon Mini No issues 6/12/2012 Service PR7 T3602 Starmon Mini No issues 6/12/2012 Service PH30 T2523 Starmon Mini No issues 6/12/2012 Service PR14 T3604 Starmon Mini No issues 6/12/2012 Service PH27 T3605 Starmon Mini No issues 7/12/2012 Service PR2 T3600 Starmon Mini No issues 7/12/2012 Service PR4 T3599 Starmon Mini No issues 7/12/2012 Service PR7 T3602 Starmon Mini No issues 7/12/2012 Service PH30 T2523 Starmon Mini No issues 7/12/2012 Service PR14 T3604 Starmon Mini No issues 7/12/2012 Service PH27 T3605 Starmon Mini No issues 8/8/2012 Service PR2 T3600 Starmon Mini No issues 8/8/2012 Service PR4 T3599 Starmon Mini No issues 8/8/2012 Service PR7 T3602 Starmon Mini No issues 8/8/2012 Service PH30 T2523 Starmon Mini No issues 8/8/2012 Service PR14 T3604 Starmon Mini No issues 8/8/2012 Service PH27 T3605 Starmon Mini No issues 9/20/2012 Service PR2 T3600 Starmon Mini No issues 9/20/2012 Service PR4 T3599 Starmon Mini No issues 9/19/2012 Service PR7 T3602 Starmon Mini No issues 9/19/2012 Service PH30 T2523 Starmon Mini No issues 9/19/2012 Service PR14 T3604 Starmon Mini No issues 9/19/2012 Service PH27 T3605 Starmon Mini No issues Draft Water Temperature and Water Quality Report B-1 January 2013

70 Calibration certificate for the installed water temperature loggers Post deployment. Pending Draft Water Temperature and Water Quality Report B-2 January 2013

71 Pending Draft Water Temperature and Water Quality Report B-3 January 2013

72 Field calibration record for dissolved oxygen sensor Saturated air calibration method. Ambient Characteristics Air Calibration Calculations Instrument Readings Dissolved Oxygen Air Saturation DO Concentration Meter Validation Elevation Air Temp. DO Concentration at Elevation 3 at Elevation 4 Meter Date Time Station (ft) Instrument ( C) (mg/l) 1 at Temp. (mg/l) 2 (%) (mg/l) Check Calibration Action 6/12/ PR Hydrolab MS % Adjusted to Air calcs. 6/13/ LB 2700 Hydrolab MS % Adjusted to Air calcs 7/12/ LB 2700 Hydrolab MS % Adjusted to Air calcs 8/8/ LB 2700 Hydrolab MS % Adjusted to Air calcs 9/19/ PH Hydrolab MS % Adjusted to Air calcs 9/20/ PR Hydrolab MS % Adjusted to Air calcs 1 Instrument reading in saturated chamber at calibration location. 2 Calculated DO in 100% saturated air at sea level for current air temperature. 3 Calculated air saturation percentage for site elevation. 4 Calculated DO in 100% saturated air at site elevation. Draft Water Temperature and Water Quality Report B-4 January 2013

73 APPENDIX C METEOROLOGICAL MONITORING DATA Draft Water Temperature and Water Quality Report January 2013

74 APPENDIX C1 METEOROLOGICAL MONITORING DATA Summer Air Temperature Rankings for Period of Record from NWS Station at Hat Creek Powerhouse No.1 (June-July) June July Year C Rank Exceedance 1 Index Year C Rank Exceedance 1 Index % 18% Abv Norm % 23% Abv Norm % 6% Hot % 15% Abv Norm % 87% Blw Norm % 47% Norm % 23% Abv Norm % 6% Hot % 45% Norm % 35% Norm % 68% Norm % 4% Hot % 39% Norm % 54% Norm % 31% Norm % 63% Norm % 4% Hot % 0% Hot % 35% Norm % 71% Blw Norm % 37% Norm % 9% Hot % 11% Abv Norm % 58% Norm % 44% Norm % 67% Norm % 27% Abv Norm % 28% Abv Norm % 5% Hot % 14% Abv Norm % 48% Norm % 2% Hot % 0% Hot % 17% Abv Norm % 60% Norm % 70% Blw Norm % 52% Norm % 21% Abv Norm % 92% Cold % 30% Abv Norm % 86% Blw Norm % 41% Norm % 30% Abv Norm % 36% Norm % 69% Norm % 8% Hot % 82% Blw Norm % 18% Abv Norm % 27% Abv Norm % 93% Cold % 49% Norm % 81% Blw Norm % 19% Abv Norm % 32% Norm % 95% Cold % 12% Abv Norm Draft Water Temperature and Water Quality Report C-1 January 2013

75 June July Year C Rank Exceedance 1 Index Year C Rank Exceedance 1 Index % 99% Cold % 68% Norm % 85% Blw Norm % 5% Hot % 70% Blw Norm % 66% Norm % 67% Norm % 75% Blw Norm % 25% Abv Norm % 96% Cold % 73% Blw Norm % 43% Norm % 35% Norm % 90% Blw Norm % 10% Hot % 55% Norm % 13% Abv Norm % 45% Norm % 74% Blw Norm % 20% Abv Norm % 80% Blw Norm % 53% Norm % 94% Cold % 85% Blw Norm % 77% Blw Norm % 100% Cold % 83% Blw Norm % 77% Blw Norm % 62% Norm % 82% Blw Norm % 51% Norm % 99% Cold % 50% Norm % 38% Norm % 41% Norm % 56% Norm % 89% Blw Norm % 73% Blw Norm % 24% Abv Norm % 69% Norm % 47% Norm % 61% Norm % 37% Norm % 44% Norm % 57% Norm % 39% Norm % 88% Blw Norm % 86% Blw Norm % 1% Hot % 78% Blw Norm % 54% Norm % 33% Norm % 43% Norm % 37% Norm % 98% Cold % 29% Abv Norm % 14% Abv Norm % 64% Norm % 55% Norm % 52% Norm % 76% Blw Norm % 60% Norm % 2% Hot % 87% Blw Norm % 7% Hot % 97% Cold Draft Water Temperature and Water Quality Report C-2 January 2013

76 June July Year C Rank Exceedance 1 Index Year C Rank Exceedance 1 Index % 8% Hot % 10% Abv Norm % 32% Norm % 16% Abv Norm % 17% Abv Norm % 77% Blw Norm % 62% Norm % 91% Cold % 75% Blw Norm % 1% Hot % 22% Abv Norm % 84% Blw Norm % 79% Blw Norm % 24% Abv Norm % 66% Norm % 14% Abv Norm % 93% Cold % 74% Blw Norm % 63% Norm % 94% Cold % 81% Blw Norm % 8% Hot % 91% Cold % 79% Blw Norm % 20% Abv Norm % 89% Blw Norm % 58% Norm % 40% Norm % 39% Norm % 98% Cold % 12% Abv Norm % 92% Cold % 29% Abv Norm % 62% Norm % 100% Cold % 23% Abv Norm % 16% Abv Norm % 27% Abv Norm % 42% Norm % 50% Norm % 64% Norm % 25% Abv Norm % 57% Norm % 31% Norm % 97% Cold % 83% Blw Norm % 93% Cold % 46% Norm % 79% Blw Norm % 52% Norm % 48% Norm % 79% Blw Norm % 76% Blw Norm 1 Exceedance is defined as the percent of total observations that have exceeded this value in the period of record. Draft Water Temperature and Water Quality Report C-3 January 2013

77 APPENDIX C1 METEOROLOGICAL MONITORING DATA Summer Air Temperature Rankings for Period of Record from NWS Station at Hat Creek Powerhouse No.1 (August-September) August September Year C Rank Exceedance 1 Index Year C Rank Exceedance 1 Index % 30% Abv Norm % 37% Norm % 44% Norm % 16% Abv Norm % 10% Hot % 0% Hot % 40% Norm % 89% Blw Norm % 54% Norm % 85% Blw Norm % 27% Abv Norm % 53% Norm % 21% Abv Norm % 70% Blw Norm % 71% Blw Norm % 62% Norm % 0% Hot % 60% Norm % 33% Norm % 4% Hot % 12% Abv Norm % 66% Norm % 8% Hot % 17% Abv Norm % 17% Abv Norm % 6% Hot % 14% Abv Norm % 39% Norm % 35% Norm % 31% Norm % 38% Norm % 20% Abv Norm % 4% Hot % 25% Abv Norm % 5% Hot % 67% Norm % 62% Norm % 86% Blw Norm % 26% Abv Norm % 47% Norm % 90% Blw Norm % 2% Hot % 53% Norm % 5% Hot % 32% Norm % 23% Abv Norm % 15% Abv Norm % 61% Norm % 92% Cold % 35% Norm % 82% Blw Norm % 64% Norm % 81% Blw Norm % 15% Abv Norm % 28% Abv Norm % 45% Norm Draft Water Temperature and Water Quality Report C-4 January 2013

78 August September Year C Rank Exceedance 1 Index Year C Rank Exceedance 1 Index % 34% Norm % 18% Abv Norm % 57% Norm % 13% Abv Norm % 85% Blw Norm % 8% Hot % 97% Cold % 97% Cold % 58% Norm % 83% Blw Norm % 93% Cold % 81% Blw Norm % 100% Cold % 73% Blw Norm % 2% Hot % 68% Norm % 88% Blw Norm % 90% Blw Norm % 64% Norm % 50% Norm % 37% Norm % 99% Cold % 80% Blw Norm % 46% Norm % 95% Cold % 38% Norm % 68% Norm % 92% Cold % 31% Norm % 98% Cold % 6% Hot % 58% Norm % 98% Cold % 14% Abv Norm % 77% Blw Norm % 73% Blw Norm % 67% Norm % 41% Norm % 22% Abv Norm % 79% Blw Norm % 50% Norm % 91% Cold % 74% Blw Norm % 96% Cold % 47% Norm % 69% Norm % 86% Blw Norm % 28% Abv Norm % 99% Cold % 7% Hot % 1% Hot % 32% Norm % 25% Abv Norm % 63% Norm % 91% Cold % 84% Blw Norm % 51% Norm % 23% Abv Norm % 13% Abv Norm % 43% Norm % 53% Norm % 12% Abv Norm % 59% Norm % 76% Blw Norm % 24% Abv Norm % 33% Norm Draft Water Temperature and Water Quality Report C-5 January 2013

79 August September Year C Rank Exceedance 1 Index Year C Rank Exceedance 1 Index % 75% Blw Norm % 36% Norm % 11% Abv Norm % 93% Cold % 20% Abv Norm % 94% Cold % 7% Hot % 21% Abv Norm % 40% Norm % 29% Abv Norm % 41% Norm % 51% Norm % 19% Abv Norm % 41% Norm % 72% Blw Norm % 1% Hot % 66% Norm % 56% Norm % 42% Norm % 48% Norm % 84% Blw Norm % 45% Norm % 48% Norm % 10% Abv Norm % 94% Cold % 74% Blw Norm % 62% Norm % 9% Hot % 55% Norm % 52% Norm % 71% Blw Norm % 82% Blw Norm % 79% Blw Norm % 55% Norm % 60% Norm % 59% Norm % 45% Norm % 30% Abv Norm % 87% Blw Norm % 78% Blw Norm % 66% Norm % 100% Cold % 18% Abv Norm % 77% Blw Norm % 74% Blw Norm % 87% Blw Norm % 78% Blw Norm % 54% Norm % 51% Norm % 24% Abv Norm % 15% Abv Norm % 75% Blw Norm % 5% Hot % 9% Hot 1 Exceedance is defined as the percent of total observations that have exceeded this value in the period of record. Draft Water Temperature and Water Quality Report C-6 January 2013

80 APPENDIX C2 METEOROLOGICAL MONITORING DATA Daily Average Data from Seasonal Monitoring Meteorological Station on Pit 3 Intake Wind Wind Air Relative Solar Radiation Speed Direction Temperature Humidity Pyrometer Day (m/s) (degrees) ( o C) (%) (W/m 2 ) zero corr. 1 1-Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Draft Water Temperature and Water Quality Report C-7 January 2013

81 Wind Wind Air Relative Solar Radiation Speed Direction Temperature Humidity Pyrometer Day (m/s) (degrees) ( o C) (%) (W/m 2 ) zero corr Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Draft Water Temperature and Water Quality Report C-8 January 2013

82 Wind Wind Air Relative Solar Radiation Speed Direction Temperature Humidity Pyrometer Day (m/s) (degrees) ( o C) (%) (W/m 2 ) zero corr Aug Aug Aug Aug Aug Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Sep Raw solar data are processed to eliminate night time zero readings. Draft Water Temperature and Water Quality Report C-9 January 2013

83 APPENDIX D HYDROLOGY DATA Draft Water Temperature and Water Quality Report January 2013

84 APPENDIX D1 HYDROLOGY DATA Daily average stream flow from USGS Station Pit River downstream of Pit 1 Powerhouse. Water-Data Report Pit River below Pit No. 1 Power plant, near Fall River Mills, CA DISCHARGE, CUBIC FEET PER SECOND WATER YEAR OCTOBER 2011 TO SEPTEMBER 2012 DAILY MEAN VALUES [e, estimated] Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep ,310 1,350 1,300 1,220 1,720 1,710 1,880 1, ,020 1, ,390 1,230 1,360 1,360 1,260 1,390 1,790 1,750 1,150 1,040 1,030 1, ,180 1,210 1, ,400 1,220 1,810 1,810 1,040 1, , ,210 1,190 1,340 1,250 1,430 1,220 1,830 1,410 1, , ,180 1,210 1,180 1,280 1,230 1,210 1,700 1,610 1, , ,200 1,300 1,290 1,270 1,270 1,350 1,830 1,470 1,230 1, , ,200 1,160 1,410 1,370 1,230 1,370 1,670 1,390 1,220 1,030 1,010 1, ,200 1,440 1,440 1,270 1,210 1,330 1,800 e 1,510 1,160 1,040 1,040 1, ,220 1,420 1,460 1,210 e 1,230 1,260 1,720 e 1,420 1,130 1,050 1,040 1, ,150 1,390 1,310 e 1,400 1,250 1,200 1,820 e 1,410 1, ,020 1, ,210 1,430 1,330 e 1,450 1,320 1,180 1,730 1,270 1,120 1, , ,260 1,250 1,240 1,480 1,220 1,400 1,670 1,280 1,040 1, , ,260 1,210 1,200 1,330 1,350 1,160 1,830 1,190 1, , ,120 1,300 1,220 e 1,360 e 1,460 1,760 1,690 1,210 1, , ,370 1,220 1,240 1,470 1,450 1,420 1,550 1, , ,470 1,430 1,240 1,380 e 1,500 1,560 1,500 1,560 1, , ,300 1,370 1,270 1,360 e 1,450 1,860 1,660 1, ,000 1, ,170 1,270 1,290 1,310 1,430 1,950 1,670 1, ,010 1, ,230 1,220 1,300 1,470 1,310 1,990 1,670 1,290 1, , ,170 1,270 1,410 1,360 1,270 2,080 1,520 1,050 1, ,010 1, ,210 1,310 1,390 1,420 1,200 1,990 1,370 1, ,010 1, ,240 1,330 1,270 e 1,340 1,240 1,880 1,360 1,190 1, ,000 1, ,220 1,450 1,280 e 1,360 1,250 1,900 1,350 1,230 1, ,010 1, ,260 1,400 1,320 e 1,290 1,220 1,510 1,300 1, ,010 1, ,240 1,290 1,310 e 1,280 1,190 1,400 1,390 1,300 1, ,010 1, ,330 1,310 1,270 e 1,320 1,270 1,490 1,490 1,260 1, , ,360 1,290 1,240 1,290 1,250 1,750 1,750 1,190 1, ,370 1,300 1,280 1,240 1,140 1,610 1,690 1,100 1, , ,310 1,360 1,260 1,230 1,240 1,780 1,570 1,120 1, , ,170 1,380 1,260 1,360 1,730 2,070 1,290 1,010 1, , ,200 1,260 1,360 1,750 1,240 1, Total Mean Max Min Ac-ft Draft Water Temperature and Water Quality Report D-1 January 2013

85 APPENDIX D 2 HYDROLOGY DATA Monthly ranking of stream flow from USGS Station Pit River downstream of Pit 1 Powerhouse. May June July Year cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index ,604 47% 53% Norm 1,374 47% 53% Norm 1,308 67% 33% Norm ,403 14% 86% Blw Norm 1,266 28% 72% Blw Norm 1,213 44% 56% Norm ,226 61% 39% Norm 1,310 42% 58% Norm 1,273 58% 42% Norm ,845 56% 45% Norm 1,212 17% 83% Blw Norm 1,186 36% 64% Norm ,223 58% 42% Norm 1,592 67% 33% Norm 1,275 61% 39% Norm ,417 22% 78% Blw Norm 1,233 19% 81% Blw Norm 1,131 22% 78% Blw Norm ,702 75% 25% Abv Norm 1,729 81% 20% Abv Norm 1,555 92% 8% Wet ,861 92% 8% Wet 2,789 97% 3% Wet 1,666 97% 3% Wet ,715 78% 22% Abv Norm 2,195 86% 14% Abv Norm 1,465 83% 17% Abv Norm ,522 39% 61% Norm 1,452 56% 45% Norm 1,347 69% 31% Norm ,522 69% 31% Norm 1,645 69% 31% Norm 1,517 89% 11% Abv Norm ,415 19% 81% Blw Norm 1,332 44% 56% Norm 1,261 56% 45% Norm ,483 33% 67% Norm 1,286 36% 64% Norm 1,167 33% 67% Norm ,530 44% 56% Norm 1,248 22% 78% Blw Norm 1,150 28% 72% Blw Norm ,246 3% 97% Dry 1,463 58% 42% Norm 1,102 19% 81% Blw Norm ,264 64% 36% Norm 1,280 33% 67% Norm 1,190 39% 61% Norm ,050 0% 100% Dry 1,012 0% 100% Dry 1,004 6% 95% Dry ,413 67% 33% Norm 2,242 89% 11% Abv Norm 1,276 64% 36% Norm ,411 17% 83% Blw Norm 1,152 8% 92% Dry 954 0% 100% Dry , % 0% Wet 2,452 94% 6% Wet 1,619 94% 6% Wet ,680 72% 28% Abv Norm 1,679 75% 25% Abv Norm 1,370 72% 28% Abv Norm ,838 53% 47% Norm 1,568 64% 36% Norm 1,400 78% 22% Abv Norm ,746 97% 3% Wet 4, % 0% Wet 1, % 0% Wet ,832 81% 20% Abv Norm 1,971 83% 17% Abv Norm 1,506 86% 14% Abv Norm ,786 50% 50% Norm 1,466 61% 39% Norm 1,425 81% 20% Abv Norm ,426 28% 72% Blw Norm 1,277 31% 70% Norm 1,247 53% 47% Norm ,527 42% 58% Norm 1,249 25% 75% Blw Norm 1,160 31% 70% Norm Draft Water Temperature and Water Quality Report D-2 January 2013

86 May June July Year cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index ,080 86% 14% Abv Norm 1,387 50% 50% Norm 1,194 42% 58% Norm ,377 11% 89% Blw Norm 1,194 14% 86% Blw Norm 1,042 11% 89% Blw Norm ,348 94% 6% Wet 1,720 78% 22% Abv Norm 1,217 47% 53% Norm ,145 89% 11% Abv Norm 1,653 72% 28% Abv Norm 1,371 75% 25% Abv Norm ,251 6% 95% Dry 1,135 6% 95% Dry 1,073 17% 83% Blw Norm ,515 36% 64% Norm 1,447 53% 47% Norm 1,137 25% 75% Blw Norm ,436 31% 70% Norm 1,181 11% 89% Blw Norm 1,069 14% 86% Blw Norm ,420 25% 75% Blw Norm 1,296 39% 61% Norm 1,010 8% 92% Dry ,011 83% 17% Abv Norm 2,287 92% 8% Wet 1,245 50% 50% Norm ,359 8% 92% Dry 1,073 3% 97% Dry 987 3% 97% Dry 1 Exceedance is defined as the percent of total observations that have exceeded this value in the period of record. Draft Water Temperature and Water Quality Report D-3 January 2013

87 APPENDIX D 2 HYDROLOGY DATA Monthly ranking of stream flow from USGS Station Pit River downstream of Pit 1 Powerhouse. August September Annual Total as Average Monthly Flow Year cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index , , ,389 84% 16% Abv Norm 1,338 70% 30% Abv Norm % 53% Norm ,238 54% 46% Norm 1,284 49% 51% Norm % 81% Blw Norm ,278 65% 35% Norm 1,312 62% 38% Norm % 39% Norm ,187 46% 54% Norm 1,219 41% 60% Norm % 58% Norm ,220 49% 51% Norm 1,315 65% 35% Norm % 28% Abv Norm ,134 30% 70% Blw Norm 1,163 30% 70% Blw Norm % 75% Blw Norm ,361 76% 24% Abv Norm 1,404 76% 24% Abv Norm % 8% Wet ,563 97% 3% Wet 1,623 97% 3% Wet % 6% Wet ,439 86% 14% Abv Norm 1,539 89% 11% Abv Norm % 20% Abv Norm ,368 81% 19% Abv Norm 1,528 86% 14% Abv Norm % 42% Norm ,366 78% 22% Abv Norm 1,508 84% 16% Abv Norm % 11% Abv Norm ,240 57% 43% Norm 1,249 46% 54% Norm % 61% Norm ,164 38% 62% Norm 1,190 38% 62% Norm % 72% Blw Norm ,174 43% 57% Norm 1,221 43% 57% Norm % 45% Norm ,099 24% 76% Blw Norm 1,134 27% 73% Blw Norm % 86% Blw Norm ,118 27% 73% Blw Norm 1,040 8% 92% Dry % 78% Blw Norm % 95% Dry 1,027 3% 97% Dry % 100% Dry ,220 49% 51% Norm 1,291 54% 46% Norm % 31% Norm % 100% Dry 784 0% 100% Dry % 97% Dry ,359 73% 27% Abv Norm 1,291 54% 46% Norm % 3% Wet ,275 62% 38% Norm 1,289 51% 49% Norm % 22% Abv Norm ,315 70% 30% Abv Norm 1,387 73% 27% Abv Norm % 25% Abv Norm , % 0% Wet 1, % 0% Wet % 0% Wet ,493 92% 8% Wet 1,552 92% 8% Wet % 14% Abv Norm ,471 89% 11% Abv Norm 1,476 81% 19% Abv Norm % 36% Norm ,243 59% 41% Norm 1,293 59% 41% Norm % 67% Norm ,170 41% 60% Norm 1,185 35% 65% Norm % 64% Norm Draft Water Temperature and Water Quality Report D-4 January 2013

88 August September Annual Total as Average Monthly Flow Year cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index cfs Rank Exceedance 1 Index % 97% Dry 1,413 78% 22% Abv Norm % 50% Norm ,043 11% 89% Blw Norm 1,075 14% 87% Blw Norm % 56% Norm ,139 35% 65% Norm 1,181 32% 68% Norm % 47% Norm ,291 68% 33% Norm 1,324 68% 33% Norm % 17% Abv Norm ,047 14% 87% Blw Norm 1,125 24% 76% Blw Norm % 86% Blw Norm ,097 22% 78% Blw Norm 1,123 19% 81% Blw Norm % 70% Norm ,069 16% 84% Blw Norm 1,049 11% 89% Blw Norm % 89% Blw Norm ,085 19% 81% Blw Norm 1,121 16% 84% Blw Norm % 92% Dry ,137 32% 68% Norm 1,123 19% 81% Blw Norm % 33% Norm % 92% Dry 1,039 5% 95% Dry % 95% Dry 1 Exceedance is defined as the percent of total observations that have exceeded this value in the period of record. Draft Water Temperature and Water Quality Report D-5 January 2013

89 APPENDIX D3 HYDROLOGY DATA Daily average reservoir elevation Lake Britton Station PH-37 Station Daily Average Elevation (ft amsl) ID Year Day June July August September PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH Draft Water Temperature and Water Quality Report D-6 January 2013

90 APPENDIX D 4 HYDROLOGY DATA Daily average stream flow Pit 3 Reach Station PH-35 Station Daily Average Flow (cfs) ID Year Day June July August September PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH Draft Water Temperature and Water Quality Report D-7 January 2013

91 APPENDIX D5 HYDROLOGY DATA Daily average stream flow Pit 4 Reach Station PH-30 Station Daily Average Flow (cfs) ID Year Day June July August September PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH Draft Water Temperature and Water Quality Report D-8 January 2013

92 APPENDIX D6 HYDROLOGY DATA Daily average stream flow Pit 5 Reach Station PH-27 Station Daily Average Flow (cfs) ID Year Day June July August September PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH PH Draft Water Temperature and Water Quality Report D-9 January 2013

93 APPENDIX E LAKE BRITTON PROFILE DATA Draft Water Temperature and Water Quality Report January 2013

94 APPENDIX E LAKE BRITTON PROFILE DATA Reservoir Profile Datasheet Date Time Elevation Stage 06/13/12 Location Lake Britton near Dam 11:16 Instrument HydroLab MS5 Samplers T. Sagraves - E. Sagraves Weather Clear Warm % Cloud Cover 0% Secchi 10.8 ft m Depth Elevation Temp DO DO Sat ft m ft ( C) (mg/l) (% ) calc Bottom reading (ft ) 79.6 tape 77.2 Depth Finder Reading (ft) -- Draft Water Temperature and Water Quality Report E-1 January 2013

95 Reservoir Profile Datasheet Date Time Elevation Stage 07/12/12 10: Location Instrument Samplers Weather % Cloud Cover Lake Britton near Dam MS5 T. Sagraves - E. Sagraves Clear and hot 0% Secchi 13.5 ft m Depth Elevation Temp DO DO Sat ft m ft ( C) (mg/l) (% ) calc Bottom reading (ft ) 79.0 tape 78.1 Depth Finder Reading (ft) 80.0 Draft Water Temperature and Water Quality Report E-2 January 2013

96 Reservoir Profile Datasheet Date Time Elevation Stage 08/08/12 Location Lake Britton near Dam 0:00 Instrument MS5 Samplers T. Sagraves - E. Sagraves Weather Clear and Hot % Cloud Cover < 5% smoke haze Secchi 11.7 ft m Depth Elevation Temp DO DO Sat ft m ft ( C) (mg/l) (% ) calc Bottom reading (ft ) 81.3 tape 81.4 Depth Finder Reading (ft) Draft Water Temperature and Water Quality Report E-3 January 2013

97 Reservoir Profile Datasheet Date Time Elevation Stage 09/21/12 Location Lake Britton near Dam 0:00 Instrument MS5 Samplers T. Sagraves Weather Clear and mild % Cloud Cover < 5% Secchi 11.9 ft m Depth Elevation Temp DO DO Sat ft m ft ( C) (mg/l) (% ) calc Bottom reading (ft ) 76.5 tape 76.3 Depth Finder Reading (ft) Draft Water Temperature and Water Quality Report E-4 January 2013

98 APPENDIX F CONTINUOUS WATER TEMPERATURE DATA Draft Water Temperature and Water Quality Report January 2013

99 APPENDIX F CONTINUOUS WATER TEMPERATURE DATA Station PR2 - Pit 3 Reach Station PR7 - Pit 4 Reach Water Temperature ( C) Water Temperature ( C) Date Average 1 Maximum 1 Minimum 1 Average 1 Maximum 1 Minimum 1 06/01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ /29/ /30/ /01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ Draft Water Temperature and Water Quality Report F-1 January 2013

100 Station PR2 - Pit 3 Reach Station PR7 - Pit 4 Reach Water Temperature ( C) Water Temperature ( C) Date Average 1 Maximum 1 Minimum 1 Average 1 Maximum 1 Minimum 1 07/14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ /29/ /30/ /31/ /01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ Draft Water Temperature and Water Quality Report F-2 January 2013

101 Station PR2 - Pit 3 Reach Station PR7 - Pit 4 Reach Water Temperature ( C) Water Temperature ( C) Date Average 1 Maximum 1 Minimum 1 Average 1 Maximum 1 Minimum 1 08/29/ /30/ /31/ /01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ /29/ /30/ Daily statistics based on hourly average data. Draft Water Temperature and Water Quality Report F-3 January 2013

102 APPENDIX F CONTINUOUS WATER TEMPERATURE DATA Station PH-30 - Pit 4 Reach Station PH-27 - Pit 5 Reach Water Temperature ( C) Water Temperature ( C) Date Average 1 Maximum 1 Minimum 1 Average 1 Maximum 1 Minimum 1 06/01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ /29/ /30/ /01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ Draft Water Temperature and Water Quality Report F-4 January 2013

103 Station PH-30 - Pit 4 Reach Station PH-27 - Pit 5 Reach Water Temperature ( C) Water Temperature ( C) Date Average 1 Maximum 1 Minimum 1 Average 1 Maximum 1 Minimum 1 07/14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ /29/ /30/ /31/ /01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ Draft Water Temperature and Water Quality Report F-5 January 2013

104 Station PH-30 - Pit 4 Reach Station PH-27 - Pit 5 Reach Water Temperature ( C) Water Temperature ( C) Date Average 1 Maximum 1 Minimum 1 Average 1 Maximum 1 Minimum 1 08/29/ /30/ /31/ /01/ /02/ /03/ /04/ /05/ /06/ /07/ /08/ /09/ /10/ /11/ /12/ /13/ /14/ /15/ /16/ /17/ /18/ /19/ /20/ /21/ /22/ /23/ /24/ /25/ /26/ /27/ /28/ /29/ /30/ Daily statistics based on hourly average data. Draft Water Temperature and Water Quality Report F-6 January 2013

105 APPENDIX G LAKE BRITTON ALGAE BLOOM PHOTOGRAPHIC DOCUMENTATION Draft Water Temperature and Water Quality Report January 2013

106 APPENDIX G LAKE BRITTON ALGAE BLOOM PHOTOGRAPHIC DOCUMENTATION Lake Britton Algae Documentation June 14, 2012 Station View Downstream In Water View Upstream Pit 3 Dam - Upstream of Pit 3 Intake South ferry inlet McArthur- Burney Falls State Park - Marina Dock No Photograph McArthur- Burney Falls State Park - Swim Area Draft Water Temperature and Water Quality Report G-1 January 2013

107 Lake Britton Algae Documentation June 14, 2012 Station View Downstream In Water View Upstream McArthur- Burney Falls State Park - Western point No Photograph Dusty Camp Jamo Point Boat Ramp - Fishing Platform Pines Picnic Area North Shore Campground - Swim Cove North Shore Campground - Point No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access North Ferry Access Clark Creek Arm Draft Water Temperature and Water Quality Report G-2 January 2013

108 Lake Britton Algae Documentation June 14, 2012 Station View Downstream In Water View Upstream Pit 3 Dam Overlook Draft Water Temperature and Water Quality Report G-3 January 2013

109 Lake Britton Algae Documentation July 13, 2012 Station View Downstream In Water View Upstream Pit 3 Dam - Upstream of Pit 3 Intake South Ferry inlet McArthur- Burney Falls State Park - Marina Dock McArthur- Burney Falls State Park - Swim Area Draft Water Temperature and Water Quality Report G-4 January 2013

110 Lake Britton Algae Documentation July 13, 2012 Station View Downstream In Water View Upstream McArthur- Burney Falls State Park - Western point Dusty Camp Jamo Point Boat Ramp - Fishing Platform Pines Picnic Area Draft Water Temperature and Water Quality Report G-5 January 2013

111 Lake Britton Algae Documentation July 13, 2012 Station View Downstream In Water View Upstream North Shore Campground - Swim Cove North Shore Campground - Point No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access North Ferry inlet Pit 3 Dam Overlook Draft Water Temperature and Water Quality Report G-6 January 2013

112 Lake Britton Algae Documentation August 9, 2012 Station View Downstream In Water View Upstream Pit 3 Dam - Upstream of Pit 3 Intake South Ferry inlet McArthur -Burney Falls State Park - Marina Dock Draft Water Temperature and Water Quality Report G-7 January 2013

113 Lake Britton Algae Documentation August 9, 2012 Station View Downstream In Water View Upstream McArthur -Burney Falls State Park - Swim Area McArthur -Burney Falls State Park - Western point Dusty Camp Jamo Point Boat Ramp - Fishing Platform Draft Water Temperature and Water Quality Report G-8 January 2013

114 Lake Britton Algae Documentation August 9, 2012 Station View Downstream In Water View Upstream Pines Picnic Area North Shore Campgro und - Swim Cove North Shore Campgro und - Point No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access North Ferry Access Clark Creek Arm Pit 3 Dam Overlook Draft Water Temperature and Water Quality Report G-9 January 2013

115 Lake Britton Algae Documentation September 20, 2012 Station View Downstream In Water View Upstream Pit 3 Dam - Upstream of Pit 3 Intake South Ferry inlet McArthur -Burney Falls State Park - Marina Dock McArthur -Burney Falls State Park - Swim Area Draft Water Temperature and Water Quality Report G-10 January 2013

116 Lake Britton Algae Documentation September 20, 2012 Station View Downstream In Water View Upstream McArthur -Burney Falls State Park - Western point Dusty Camp Jamo Point Boat Ramp - Fishing Platform Pines Picnic Area Draft Water Temperature and Water Quality Report G-11 January 2013

117 Lake Britton Algae Documentation September 20, 2012 Station View Downstream In Water View Upstream North Shore Campgro und - Swim Cove North Shore Campgro und - Point No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access No Photograph No Access North Shore Ferry inlet Pit 3 Dam Overlook Draft Water Temperature and Water Quality Report G-12 January 2013