Salinas Valley Water Project Annual Flow Monitoring Report

Transcription

1 Salinas Valley Water Project Annual Flow Monitoring Report Operational Season 2013 Monterey County Water Resources Agency 893 Blanco Circle Salinas, CA April 2014 Revised July 2014

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3 TABLE OF CONTENTS BACKGROUND AND INTRODUCTION OPERATIONAL SEASON... 4 YEAR TYPE DETERMINATION... 4 ADULT STEELHEAD UPSTREAM MIGRATION... 5 ADULT STEELHEAD UPSTREAM PASSAGE ACHIEVEMENT... 7 BLOCK FLOW RELEASE... 7 STEELHEAD SMOLT OUTMIGRATION... 8 JUVENILE STEELHEAD PASSAGE TO THE SALINAS RIVER LAGOON / LAGOON MAINTENANCE FLOWS... 9 SALINAS RIVER LAGOON WATER SURFACE ELEVATION MAINTENANCE OF SPAWNING & REARING HABITAT IN THE NACIMIENTO RIVER, BELOW NACIMIENTO DAM ADDITIONAL REQUIRED REPORTING PARAMETERS Blanco Drain SRDF Impoundment Depth/Elevation SRDF Fish Ladder Flow Performance Test Fish Screen Installation and Removal / Stream Flow at the SRDF Fish Relocation REFERENCES ACRONYMS AND ABBREVIATIONS USED IN THIS REPORT ERATTA... 18

4 LIST OF FIGURES Figure 1 SVWP Facilities and Flow Data Collection Points... 2 Figure 2 Year Type Determination WY Figure 3 Adult Steelhead Upstream Migration Flow... 6 Figure 4 Steelhead Smolt Outmigration Opportunities... 9 Figure 5 Juvenile Downstream Passage Action Flow Chart Figure 6 Smolt Outmigration Block Flow Action Flow Chart LIST OF TABLES Table 1 Summary of Data Included in this Report... 3 Table 2 Adult Steelhead Upstream Passage Days by Operational Year... 7 Table 3 Adult Steelhead Upstream Passage Days by Year Type... 7 Table 4 Mean Monthly Discharge from Blanco Drain APPENDICES Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G USGS Provisional Real Time Stream Flow USGS Approved and Provisional Mean Daily Stream Flow Reservoir Storage and Release Data Salinas River Lagoon Data SRDF Mean Daily Fish Ladder and Total Bypass Flows Blanco Drain Daily Discharge SRDF Impoundment Elevation Data

5 BACKGROUND AND INTRODUCTION In 2002, the Monterey County Water Resources Agency (Agency) Board of Directors certified the Final EIR/EIS and applied to the U.S. Army Corps of Engineers (Corps) for a permit to construct the Salinas Valley Water Project (SVWP). The SVWP consists of three components (Figure 1): 1. The Nacimiento Dam Spillway Modification. 2. Reoperation of Nacimiento and San Antonio reservoirs. 3. The Salinas River Diversion Facility (SRDF). The Agency coordinated construction of the SVWP from 2008 through The project was the culmination of multiple decades of planning, engineering and public involvement. The objectives of the SVWP are to: halt seawater intrusion; provide adequate water supplies to meet current and future (2030) water needs; improve the hydrologic balance of the Salinas Basin. During the permitting process for the SVWP, the National Oceanic and Atmospheric Administration s National Marine Fisheries Service (NMFS) initiated a formal Section 7 consultation with the Corps on the issuance of a permit for the SVWP. This consultation resulted in the Agency authoring the Salinas Valley Water Project Flow Prescription for Steelhead Trout (Flow Prescription) in 2005 and incorporating it into the project description. The Flow Prescription defines flow requirements and operational targets for managing steelhead trout (Oncorhynchus mykiss) in the Salinas River. Three main areas of monitoring are outlined in the Flow Prescription: 1. Quantify the presence of the threatened steelhead trout in the lower Salinas River system (population monitoring). 2. Manage river flows to ensure adequate water for fish passage (migration monitoring). 3. Monitor water quality to determine habitat suitability (habitat monitoring). The Flow Prescription has been incorporated into the NMFS Biological Opinion (BO) as a stand alone document, which may be modified upon mutual agreement between the Agency and NMFS, in order to facilitate future adaptive management strategies. This report is provided to NMFS in order to comply with the BO, Section X, Incidental Take Statement; Subsection D, Terms and Conditions; Item 21.a (Fish Passage), 21.b (Fish Screens), and 21.c (Fish Relocation). Table 1 summarizes data included in this report. Figure 1 shows the location of facilities and data collection points referenced in this report. 1 SVWP Annual Flow Monitoring Report for Operational Season 2013

6 Figure 1. SVWP Facilities and Flow Data Collection Points 2 SVWP Annual Flow Monitoring Report for Operational Season 2013

7 Table 1. Summary of Data Included in this Report. Data Source Location in Report Year Type Determination WY 2013 (Figure 2) Agency Page 5 Adult Steelhead Upstream Migration Flows (Figure 3) Agency Page 6 Adult Steelhead Upstream Passage Days by Operational Year (Table 2) Agency Page 7 Adult Steelhead Upstream Passage Days by Year Type (Table 3) Agency Page 7 Steelhead Smolt Outmigration Opportunities (Figure 4) Agency Page 9 Mean Monthly Discharge from Blanco Drain (Table 4) Agency Page 14 USGS Provisional Real Time Stream Flow USGS Appendix A USGS Approved and Provisional Mean Daily Stream Flow USGS Appendix B Combined Reservoir Storage Agency Appendix C Nacimiento Reservoir Releases Agency Appendix C San Antonio Reservoir Releases Agency Appendix C Compliance with Spawning and Rearing Flow Requirements Agency Appendix C Salinas River Lagoon Daily Minimum, Maximum, and Mean Agency Appendix D Salinas River Lagoon/Ocean Connectivity Status Agency Appendix D Compliance with Salinas River Lagoon Requirements Agency Appendix D SRDF Mean Daily Bypass Flow Agency Appendix E Compliance With Required Bypass Flow Agency Appendix E SRDF Mean Daily Impoundment Elevation Agency Appendix E SRDF Mean Daily Gate Elevations Agency Appendix E Blanco Drain Daily Discharge Agency Appendix F SRDF Hourly Impoundment Elevation Agency Appendix G Data analyzed and presented in this report includes USGS real time stream flow data (Appendix A) and USGS approved and USGS provisional mean daily stream flow data (Appendix B) as required in the BO. Operationally, decisions are made in real time based on field measurements, field estimates, forecasted stream flow information from the National Weather Service California Nevada River Forecast Center, and USGS provisional real time data and mean daily stream flow data. The Agency continually evaluates USGS provisional stream flow data, in its ongoing effort to make operational decisions necessary to meet targets established in the BO and Flow Prescription. Therefore, in reporting compliance, the Agency is first evaluating its success at meeting these targets utilizing provisional data. Further, USGS stream flow data has an established accuracy of plus or minus 10 percent. The Agency manages the system to respond to triggers and provide passage flows that are within 10 percent of the minimum targets as reported at the USGS stream flow stations. Therefore, Agency operations based on provisional data may not coincide with approved published USGS data. 3 SVWP Annual Flow Monitoring Report for Operational Season 2013

8 Because USGS stream flow data typically is approved and published up to one year after the water year (WY) for which it is computed this report contains approved stream flow data for WY Stream flow beyond the end of WY 2013 should be considered provisional unless identified as approved by the USGS. This report includes real time stream flow, approved and provisional mean daily stream flow, reservoir storage and releases, and Salinas River Lagoon data for the period from October 1, 2012 through November 30, Data related to the operation of the SRDF will be presented for the 2013 operational season which began on April 8, 2013 and ended on November 8, OPERATIONAL SEASON The 2013 Operational Season began on April 8, 2013 when the gates were raised at the SRDF and the impoundment of water began. Water diversions from the Salinas River at the SRDF began on April 10, YEAR TYPE DETERMINATION Year type is based on the exceedance probability (relative to the period of record) of the annual mean stream flow at the USGS stream gage Arroyo Seco near Soledad and is forecast for the current water year on March 15 and April 1. Using provisional data from that gage, year type forecasts were completed on March 15, 2013 (forecasting a mean annual flow of 96 cfs) and again on April 1, 2013 (forecasting a mean annual flow of 85 cfs). Period of record data for this analysis incorporated the most recently published USGS data, spanning the period WY 1902 through WY Both forecasts resulted in a yeartype determination of Dry Normal (Figure 2). Agency staff notified the NMFS Santa Rosa office of the year type forecasts by phone on March 15 and April 1, Subsequent evaluation of approved USGS data for the stream gage Arroyo Seco near Soledad showed the annual mean stream flow to be 72 cfs, confirming the year type determination of Dry Normal (see Figure 2, Approved Mean Annual ). 4 SVWP Annual Flow Monitoring Report for Operational Season 2013

9 Year Type Determination WY Wet Dry Wet Years Normal Years Normal Years Normal Years Dry Years 600 Annual Mean Streamflow (cfs) 400 Annual Mean Unimpaired Flow >= 260 cfs Annual Mean Unimpaired Flow 260 > Q >= 153 cfs Annual Mean Unimpaired Flow 153 > Q >= 103 cfs Annual Mean Unimpaired Flow 103 > Q >= 69 cfs Annual Mean Unimpaired Flow < 69 cfs 200 March 15, 2013 forecast: 96 cfs April 1, 2013 forecast: 85 cfs Approved Mean Annual: 72cfs Exceedence Probability (%) Figure 2. Exceedance Probability for Water Years 1902 through 2011 of annual mean stream flow for Arroyo Seco (Based on approved USGS data for Arroyo Seco near Soledad) defining Year Types: Wet, Wet Normal, Normal, Dry Normal, and Dry. Forecast Arroyo Seco near Soledad mean annual stream flow on March 15 and April 1 along with mean annual stream flow calculated from subsequently approved USGS data. ADULT STEELHEAD UPSTREAM MIGRATION The adult Steelhead upstream passage season on the mainstem of the Salinas River, for the purpose of monitoring and recording passage conditions, is defined as beginning on January 1 st and continuing through March 31 st. Adult steelhead upstream passage conditions are defined in the Flow Prescription as five or more consecutive days of a mean daily stream flow of at least 260 cubic feet per second (cfs) as measured at the USGS stream flow gage Salinas River near Chualar, when the Salinas River Mouth at the Salinas River Lagoon is open to the ocean. In January these passage conditions are met through natural flows. Beginning on February 1 st, in all year types, passage conditions will be augmented by releases from Nacimiento and/or San Antonio Reservoirs when the following triggers are met: 5 SVWP Annual Flow Monitoring Report for Operational Season 2013

10 340 cfs or higher flows are present at the Arroyo Seco near Soledad gage (USGS stream gage ), and 173 cfs or higher flows are present at the Arroyo Seco below Reliz Creek gage (USGS stream gage ). In order for the triggers to be active, the combined storage at Nacimiento and San Antonio reservoirs must exceeded 220,000 acre feet, and the Salinas River Mouth at the Salinas River Lagoon must be open to the ocean. From February 1, 2013, through March 31, 2013 combined storage at both reservoirs exceeded 222,000 acre feet (Appendix C); though for this same period, the Salinas River Mouth at the Salinas River Lagoon remained closed to the ocean (Appendix D). Therefore, no action was taken to augment flows to sustain required adult steelhead upstream passage. Figure 3 graphs USGS provisional and USGS approved mean daily flow data illustrating that no adult steelhead upstream passage conditions existed in Adult Steelhead Upstream Migration Flows Mean Daily Stream Flow (cfs) /1/13 1/15/13 1/29/13 2/12/13 2/26/13 3/12/13 3/26/13 Provisional Salinas River nr Chualar Mean Daily Stream Flow Approved Salinas River nr Chualar Mean Daily Stream Flow Passage Days Based on Approved Data Adult Upstream Migration Threshold (260 cfs) Passage Days Based on Provisional Data Lagoon Open to Ocean Figure 3. No Adult Steelhead Upstream Passage Days were logged in 2013, as defined in the Flow Prescription: 260 cfs mean daily stream flow as measured at Salinas River near Chualar and the Salinas River Mouth at the Salinas River Lagoon open to the ocean 6 SVWP Annual Flow Monitoring Report for Operational Season 2013

11 ADULT STEELHEAD UPSTREAM PASSAGE ACHIEVEMENT In order to ensure adequate adult steelhead upstream migration opportunities the Agency will provide, within a 10 percent variance and averaged over a 10 year period, the cumulative number of annual adult upstream passage days in the lower Salinas River as occurred historically. During normal year types, passage days will be achieved by natural flows or augmentation of natural flows with releases from Nacimiento and/or San Antonio Reservoirs. Little or no adult upstream passage occurred historically in dry years, and wet years, by their nature, provide adequate passage opportunities. Table 2 contains the year type and the number of passage days achieved in each operational year. Table 3 summarizes passage days by year type. Table 2. Adult Steelhead Upstream Passage Days by Operational Year Operational Year Year Type Calculated from Approved USGS Streamflow Number of Pasage Days Required on a 10 year Average (Normal Year Types) Number of Passage Days Achieved Reservoir Releases Required to Augment Natural Flows 2010 Wet N/A 70 No 2011 Wet N/A 69 No 2012 Dry N/A 0 No 2013 Dry Normal 16 0 No Table 3. Adult Steelhead Upstream Passage Days by Year Type Year Type Number of Years Number of Pasage Days Required Average Number of Passage Days per Category on a 10 year Average Achieved ( ) Wet 2 N/A 70 Wet Normal 0 73 N/A Normal 0 47 N/A Dry Normal Dry 1 N/A 0 All Year Types BLOCK FLOW RELEASE To facilitate the downstream migration of smolts and rearing juvenile steelhead in the Salinas River during normal category water years the Agency will provide, beginning March 15 th of each year, block flows when the following triggers are met. Combined storage in Nacimiento and San Antonio reservoirs is 150,000 acre feet or more, and 125 cfs at the USGS stream gage Nacimiento River below Sapaque Creek near Bryson; or, 70 cfs at the USGS stream gage Arroyo Seco below Reliz Creek near Soledad. 7 SVWP Annual Flow Monitoring Report for Operational Season 2013

12 If triggered, a block flow would require a mean daily stream flow greater than or equal to 700 cfs at the USGS stream gage Salinas River at Soledad for five consecutive days, followed by an additional 20 to 40 days of a mean daily stream flow greater than or equal to 300 cfs at the USGS stream gage Salinas River near Spreckels. Year type forecasts were completed on March 15, 2013 (forecasting a mean annual flow of 96 cfs) and April 1, 2013 (forecasting a mean annual flow of 85 cfs). Both forecasts resulted in a year type determination of Dry Normal meaning flow triggers were in effect until May 31 st. Combined reservoir storage remained above 150,000 acre feet but flow triggers were not met during the block flow period. STEELHEAD SMOLT OUTMIGRATION Steelhead smolts are expected to migrate down the Arroyo Seco and Salinas River to the ocean primarily in April and May, peaking April 1 through May 15, based on migration timing in other Central Coast streams (NMFS verbal communication, 2005). A precise relationship between stream flow levels and smolt downstream migration has not been determined for the Arroyo Seco and Salinas River. For the Arroyo Seco, flow must reach the Salinas River mainstem during the migration period in order for smolts to migrate successfully. For the Salinas River it is estimated that meeting the minimum upstream migration threshold of 150 cfs at the USGS stream gage Salinas River near Spreckels would provide suitable conditions for adults and the smaller smolts returning to the ocean. Agency analysis of historical data shows that during the peak outmigration period, when flow at the USGS stream gage Arroyo Seco below Reliz Creek near Soledad is 1 cfs or more, flow at the USGS stream gage Salinas River near Spreckels is expected to exceed 148 cfs 95% of the time during Normal year types. Therefore, the minimum flow requirements for steelhead smolt outmigration have been identified in the Flow Prescription as 1 cfs or more at the USGS stream gage Arroyo Seco below Reliz Creek near Soledad and 150 cfs or more at the USGS stream gage Salinas River near Spreckels. An analysis of provisional and approved USGS stream flow data for 2013 indicates that suitable passage opportunities did not occur during the peak smolt outmigration period (Figure 4). 8 SVWP Annual Flow Monitoring Report for Operational Season 2013

13 Steelhead Smolt Outmigration Opportunities (0 days) Discharge (cfs, logrithmic) Block Flow Period (March 15 June 20) Peak Smolt Outmigration Period (April 1 May 15) 0.0 3/15/13 4/15/13 5/15/13 6/15/13 Provisional Salinas River nr Spreckels Mean Daily Stream Flow Provisional Arroyo Seco below Reliz Mean Daily Stream Flow Salinas River near Spreckels Threshold (>=150 cfs) Lagoon Open to Ocean Approved Salinas River nr Spreckels Mean Daily Stream Flow Approved Arroyo Seco below Reliz Creek Mean Daily Stream Flow Arroyo Seco below Reliz near Soledad Threshold (>=1 cfs) Figure 4. Steelhead Smolt Outmigration Opportunities for 2013 JUVENILE STEELHEAD PASSAGE TO THE SALINAS RIVER LAGOON / LAGOON MAINTENANCE FLOWS As required by the Flow Prescription, juvenile steelhead passage flows to the lagoon are monitored by the Agency during the period from April 1 through June 30 and overlap with smolt outmigration flow criteria (Figures 5 and 6). Lagoon maintenance flows are monitored and regulated as long as SRDF diversions are occurring, or conservation releases from Nacimiento and/or San Antonio reservoirs are being made to the Salinas River. Water year 2013 was identified as a Dry Normal year type. The Flow Prescription outlines that during a non dry water year types, when total reservoir storage is 220,000 acre feet or more, the Agency will provide additional supplemental bypass flows. When the lagoon is not open to the ocean the Agency will provide 15 cfs to the lagoon through June 30 th, then 2 cfs as long as conservation releases are being made. The Salinas River Lagoon remained closed to the ocean during the entire SRDF operational season and total reservoir storage remained above 220,000 acre feet through June 29 th. 9 SVWP Annual Flow Monitoring Report for Operational Season 2013

14 Bypass flows of at least 15 cfs were maintained from April 9 th through June 30 th. Beginning July 1 st, a minimum bypass set point of 7 cfs was used to ensure a minimum of 2 cfs to the lagoon for the remainder of the operational season (Appendix E). SALINAS RIVER LAGOON WATER SURFACE ELEVATION As required by the Flow Prescription, when the Salinas River Lagoon is closed to the ocean during any time of year, lagoon water surface elevation will be maintained at a minimum elevation of three feet relative to mean sea level (msl) as measured at the Old Salinas River (OSR) slide gate. As directed in the Rearing Habitat Monitoring section of the BO, Lagoon water surface elevation was monitored once or more per week when lagoon elevation was stable and two or more times per week when conditions were less stable. To supplement visual staff gage readings at the OSR slide gate, recording stage sensors installed to the same datum, at two locations in the Salinas River Lagoon were used. Readings from these sensors are summarized to daily maximum, minimum, and mean Lagoon elevations as reported in Appendix D. Daily maximum and minimum elevations are reported to illustrate tidal and river flow influence, while mean daily elevations are used to determine compliance with our target minimum elevation of three feet. When the Salinas River Lagoon was closed to the ocean, mean daily lagoon elevations fell below three feet on 17 days between October 1, 2012 and November 30, SVWP Annual Flow Monitoring Report for Operational Season 2013

15 1 March 15 - April 1 1 Is Block-Flow Triggered? YES NO 2 YES April 1 Is Year-Type "Dry"? NO 3 April 1 - May 31 Is Block-Flow Triggered? YES Smolt Outmigration Block-Flow Criteria Govern (see p. 10). NO 2 cfs to lagoon when SRDF diversion flows OR conservation releases occur (see p. 17). NO 4 April 1 - June 30 Is Combined Storage 220,000 AF or More? (Daily Basis) YES NO 5 Is Lagoon Open to the Ocean? YES For Juveniles: 15 cfs to Lagoon thru June 30 (see p. 14). For Smolts and Kelts: 45 cfs to Lagoon for 10 days OR until Lagoon closes to the ocean, whichever occurs first (see p. 12). July 1 2 cfs to lagoon when SRDF diversion flows OR conservation releases occur (see p. 17). Figure 5. Juvenile Downstream Passage Action Flow Chart (Excerpted from Flow Prescription) 11 SVWP Annual Flow Monitoring Report for Operational Season 2013

16 NO March 15 Is Combined Reservoir Storage 150,000 Acre-Feet or More? YES NO March 15 Is Year-Type Dry-Normal, Normal, or Wet-Normal? YES NO April 1 Is Year Type Dry-Normal, Normal, Or Wet-Normal? YES NO TRIGGERS April 1 thru May Sapaque OR 70 Reliz TRIGGERS March 15 thru March Sapaque OR 70 Reliz NO YES YES 700 Salinas River at Soledad for 5 days AND 300 Salinas River near Spreckels for 15 days thereafter, totaling 20 Block-flow days AND Flow to the ocean maintained for 10 days after smolt outmigration flow ceases at Arroyo Seco River bl. Reliz 700 Salinas River at Soledad for 5 days AND 300 Salinas River near Spreckels for 15 days thereafter or until April 20, w hichever is longer, totaling 20 to 45 Block-flow days AND Flow to the ocean maintained for 10 days after smolt outmigration flow ceases at Arroyo Seco River bl. Reliz Go to Figure 5, Decision Diamond #4 for juvenilve, kelt and additional smolt flow criteria to the lagoon. No Block -Flow Reservoir Releases Go to Figure 5, Decision Diamond #4 for juvenilve, kelt and additional smolt flow criteria to the lagoon. *USGS Provisional Mean Daily Flow 1 cfs USGS Provisional Mean Daily Flow at Arroyo Seco River bl. Reliz stream gage will be used until further study indicates otherwise. Figure 6. Smolt Outmigration Block Flow Action Flow Chart (Excerpted from Flow Prescription) 12 SVWP Annual Flow Monitoring Report for Operational Season 2013

17 MAINTENANCE OF SPAWNING & REARING HABITAT IN THE NACIMIENTO RIVER, BELOW NACIMIENTO DAM During initial consultations with NMFS it was determined that a flow of 60 cfs as measured at the USGS stream flow gage Nacimiento River below Nacimiento Dam near Bradley would provide adequate spawning habitat in the Nacimiento River below Nacimiento Dam. Until a study and conclusive report on steelhead rearing habitat is performed, the Flow Prescription has defined 60 cfs as the minimum rearing flow for the Nacimiento River below Nacimiento Dam. Therefore, the minimum release rate from Nacimiento Reservoir will be 60 cfs at all times, as long as the reservoir water surface elevation remains above feet (msl), the reservoir s minimum pool, the lowest elevation at which the Agency will release water from the reservoir. The Agency, by incrementally decreasing releases by no more than 100 cfs every 4 hours, will minimize the rate of decline in stage of the Nacimiento River below Nacimiento Dam in order to prevent steelhead stranding. The Agency exceeded the recommended rate of decline during four reservoir release decreases between October 1, 2012 and November 30, Appendix C tabulates combined reservoir storage and reservoir release rates, as well as compliance with spawning and rearing flow requirements and rate of decline in the Nacimiento River. In September 2012 the hydroelectric plant at Nacimiento Dam sustained significant damage when a piece of the intake structure passed through the penstock and into the primary hydroelectric turbine (Unit 1). Unit 1 was shut down and an initial inspection identified the cause of the damage. A thorough evaluation of the damage and repair of Unit 1 began February 11, To conform to best safety practices and Cal OSHA regulations during the evaluation and repair, releases from the Low Level Outlet Works (LLOW) were halted and double blockand bleed containment was maintained, as required, while work was performed in the hydroelectric facility. Double block and bleed containment requires closing the reservoir intake valve, draining the penstock (the pipeline from the reservoir intake to the hydroelectric plant), and closing the valve to the hydroelectric generator. This configuration offers two layers of containment for the protection of workers in the hydroelectric facility but prevents any release of water from the LLOW. When reservoir elevation allowed (water surface elevation greater than 755 feet), minimum spawning and rearing flows of 60 cfs were made from the High Level Outlet Works (HLOW) in Nacimiento Dam. NMFS was consulted and mitigation measures were recommended to reduce the likelihood of take of steelhead in the Nacimiento River while the repair work was completed. For much of the months of June, July, and August water was pumped over the 13 SVWP Annual Flow Monitoring Report for Operational Season 2013

18 spillway from the reservoir at a rate of 10 to 15 cfs during work hours when double containment was required and released from the LLOW at a rate of 30 cfs or greater when double containment was not required. All repair work, including start up testing and commissioning of Unit 1 was completed on August 29, Testing of the secondary power generating unit, Unit 2, was completed September 5, Due to emergency repair activities, minimum spawning and rearing habitat flows of 60 cfs were not met on 42 days between October 1, 2012 and November 30, On occasion, unscheduled or emergency shutdown of the hydroelectric plant at Nacimiento Dam can result in temporary releases of less than 60 cfs or rates of decline that exceed 100 cfs in 4 hours. In the case of an unscheduled shutdown, Agency hydroelectric technicians initiate manual bypass flows immediately and then proceeded to troubleshoot the cause of the shutdown. There were three emergency shutdown events during this reporting period. Two emergency shutdown events (October 17, 2012 and September 16, 2013) resulted in a rate of release decrease that exceeded 100 cfs in 4 hours as seen in Appendix C. ADDITIONAL REQUIRED REPORTING PARAMETERS Blanco Drain As required in the Rearing Habitat Monitoring section of the BO, monitoring of Blanco Drain discharge to the Salinas River will include mean monthly flows from April through the first significant storm flow of each year. Daily Blanco Drain Discharge was computed for the 2013 operational season using average pump flow values and logged pump run times (Appendix F). Mean monthly discharge was calculated from daily pumped volumes from July 17, 2013 through November 7, Mean monthly discharges for July and November were calculated on incomplete daily records and may not accurately represent mean monthly discharge. Mean monthly discharge from April through November are presented in Table 4. Table 4. Mean Monthly Discharge from Blanco Drain Month Mean Monthly Discharge (cfs) April N/A May N/A June N/A July 5.0 August 4.6 September 3.4 October 1.7 November SVWP Annual Flow Monitoring Report for Operational Season 2013

19 SRDF Impoundment Depth/Elevation SRDF impoundment water depth is continuously monitored during SRDF operations to meet Rearing Habitat Monitoring requirements of the BO. Channel bottom at the SRDF is approximately at mean sea level (0 msl). Therefore, for the purpose of this report, impoundment depth is equivalent to impoundment elevation. Elevation is recorded as stage at the SRDF; Appendix G tabulates hourly depth/stage at the SRDF. SRDF Fish Ladder Flow Performance Test The Rearing Habitat Monitoring section of the BO requires that the Agency perform an annual SRDF fish ladder flow performance test to verify stage flow characteristics for the full range of SRDF impoundment operational stages. The purpose of this test is to identify flow characteristics through the fish ladder for accurate flow regulation during SRDF operation. The Agency engaged the help of the local USGS Field Office for this performance test in June 2010 and again in September Based on the results of these tests, fish ladder operations have been modified when releases of 2 cfs are required. Beginning with the 2013 operational season the Agency will use a minimum bypass set point of 7 cfs when releases are being made to the lagoon entirely through the fish ladder. Given the observed level of accuracy of the fish ladder at release rates of less than 10 cfs, a set point of 7 cfs will ensure the minimum bypass requirement of 2 cfs is met (see the Water Year 2012 Salinas Valley Water Project Annual Flow Monitoring Report for details). A minimum flow of 7 cfs may not be required if additional releases are being made from the regulating weir. Fish Screen Installation and Removal / Stream Flow at the SRDF The SRDF impoundment main gates were raised and the fish screens were installed for the 2013 operational season at the SRDF intake structure on April 8, 2013 with a mean daily flow at the Salinas River near Spreckels of 31 cfs. Bypass flow to the lagoon through the fish ladder and regulating weir began April 8, Diversions from the SRDF began on April 10, SRDF diversions for the 2013 operational season ended on October 11, As required by the BO, the SRDF impoundment was full at the end of the diversion season and was gradually drained over 28 days. The SRDF gates were lowered beginning November 8, See Appendix E for daily impoundment elevation, gate elevations, and bypass flows. Fish screens were removed from the SRDF intake structure on November 13, 2013, with a mean daily stream flow of 0 cfs recorded on that date. Fish Relocation No relocation of fish from the SRDF fish ladder or impoundment was required during the 2013 operational period. 15 SVWP Annual Flow Monitoring Report for Operational Season 2013

20 REFERENCES Monterey County Water Resources Agency (MCWRA) (2005a). Salinas Valley Water Project Flow Prescription for Steelhead Trout in the Salinas River. Prepared on October 11, 2005, by MCWRA, Salinas, CA. MCWRA (2005b). Errata to the Salinas Valley Water Project Flow Prescription for Steelhead Trout in the Salinas River. Prepared on November 8, 2005, by MCWRA, Salinas, CA. MCWRA (2005c). Errata to the Salinas Valley Water Project Flow Prescription for Steelhead Trout in the Salinas River. Prepared on December 19, 2005, by MCWRA, Salinas, CA. National Marine Fisheries Service (2007). Biological Opinion for the proposed Salinas Valley Water Project. NMFS, Southwest Region, File Number SWR/2003/2080; Admin. Number: SWR2003SR8711. MCWRA/U.S. Army Corps of Engineers/Economic Development Administration (2002). Final Environmental Impact Report/Environmental Impact Statement for the Salinas Valley Water Project, SCH# SVWP Annual Flow Monitoring Report for Operational Season 2013

21 ACRONYMS AND ABRREVIATIONS USED IN THIS REPORT AF. Agency... BO... cfs... Corps... EIR/EIS... ft... MDF... msl... NMFS... NOAA... SRDF... SVWP... USGS... WY... Acre Feet Monterey County Water Resources Agency Biological Opinion Cubic Feet per Second United States Army Corps of Engineers Environmental Impact Report/Environmental Impact Statement Feet Mean Daily Flow Mean Sea Level National Marine Fisheries Service National Oceanic and Atmospheric Administration Salinas River Diversion Facility Salinas Valley Water Project United States Geological Survey Water Year 17 SVWP Annual Flow Monitoring Report for Operational Season 2013

22 ERRATA Salinas Valley Water Project Annual Flow Monitoring Report (Operational Season 2013) The Monterey County Water Resources Agency notes the following errors or emissions in the 2013 Salinas Valley Water Project Flow Report. The July 2014 revision addresses these issues. 1. Table 4 Mean Monthly Discharge from Blanco Drain has been corrected. The April 2014 report contained mean monthly discharge in acre feet incorrectly labeled as cfs. Table 4 has been corrected to reflect mean monthly discharge in cfs. 18 SVWP Annual Flow Monitoring Report for Operational Season 2013

23 APPENDIX A

24

25 Appendix A. USGS Provisional Real Time Stream Flow. October Nacimiento River Flows (cfs) Arroyo Seco Flows (cfs) Salinas River Flows (cfs) /1/12 10/2/12 10/3/12 10/4/12 10/5/12 10/6/12 10/7/12 10/8/12 10/9/12 10/10/12 10/11/12 10/12/12 10/13/12 10/14/12 10/15/12 10/16/12 10/17/12 10/18/12 10/19/12 10/20/12 10/21/12 10/22/12 10/23/12 10/24/12 10/25/12 10/26/12 10/27/12 10/28/12 10/29/12 10/30/12 10/31/12 11/1/12 Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 1

26 Appendix A. Provisional Real Time Stream Flow. November Nacimiento River Flows (cfs) Arroyo Seco Flows (cfs) Salinas River Flows (cfs) /1/12 11/2/12 11/3/12 11/4/12 11/5/12 11/6/12 11/7/12 11/8/12 11/9/12 11/10/12 11/11/12 11/12/12 11/13/12 11/14/12 11/15/12 11/16/12 11/17/12 11/18/12 11/19/12 11/20/12 11/21/12 11/22/12 11/23/12 11/24/12 11/25/12 11/26/12 11/27/12 11/28/12 11/29/12 11/30/12 12/1/12 Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 2

27 Appendix A. USGS Provisional Real time Stream Flow. December Nacimiento River Flows (cfs) Arroyo Seco Flows (cfs) Salinas River Flows (cfs) /1/12 12/2/12 12/3/12 12/4/12 12/5/12 12/6/12 12/7/12 12/8/12 12/9/12 12/10/12 12/11/12 12/12/12 12/13/12 12/14/12 12/15/12 12/16/12 12/17/12 12/18/12 12/19/12 12/20/12 12/21/12 12/22/12 12/23/12 12/24/12 12/25/12 12/26/12 12/27/12 12/28/12 12/29/12 12/30/12 12/31/12 1/1/13 Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 3

28 Appendix A. USGS Provisional Real Time Stream Flow. January Nacimiento River Flows (cfs) /1/13 1/2/13 1/3/13 1/4/13 1/5/13 1/6/13 1/7/13 1/8/13 1/9/13 1/10/13 1/11/13 1/12/13 1/13/13 1/14/13 1/15/13 1/16/13 1/17/13 1/18/13 1/19/13 1/20/13 1/21/13 1/22/13 1/23/13 1/24/13 1/25/13 1/26/13 1/27/13 1/28/13 Arroyo Seco Flows (cfs) 1/29/13 1/30/13 1/31/13 2/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 4

29 Appendix A. USGS Provisional Real Time Stream Flow. February Nacimiento River Flows (cfs) /1/13 2/2/13 2/3/13 2/4/13 2/5/13 2/6/13 2/7/13 2/8/13 2/9/13 2/10/13 2/11/13 2/12/13 2/13/13 2/14/13 2/15/13 2/16/13 2/17/13 2/18/13 2/19/13 2/20/13 2/21/13 2/22/13 2/23/13 2/24/13 2/25/13 Arroyo Seco Flows (cfs) 2/26/13 2/27/13 2/28/13 3/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 5

30 Appendix A. USGS Provisional Real Time Stream Flow. March Nacimiento River Flows (cfs) /1/13 3/2/13 3/3/13 3/4/13 3/5/13 3/6/13 3/7/13 3/8/13 3/9/13 3/10/13 3/11/13 3/12/13 3/13/13 3/14/13 3/15/13 3/16/13 3/17/13 3/18/13 3/19/13 3/20/13 3/21/13 3/22/13 3/23/13 3/24/13 3/25/13 3/26/13 3/27/13 3/28/13 Arroyo Seco Flows (cfs) 3/29/13 3/30/13 3/31/13 4/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 6

31 Appendix A. USGS Provisional Real Time Stream Flow. April Nacimiento River Flows (cfs) /1/13 4/2/13 4/3/13 4/4/13 4/5/13 4/6/13 4/7/13 4/8/13 4/9/13 4/10/13 4/11/13 4/12/13 4/13/13 4/14/13 4/15/13 4/16/13 4/17/13 4/18/13 4/19/13 4/20/13 4/21/13 4/22/13 4/23/13 4/24/13 4/25/13 4/26/13 4/27/13 Arroyo Seco Flows (cfs) 4/28/13 4/29/13 4/30/13 5/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 7

32 Appendix A. USGS Provisional Real Time Stream Flow. May Nacimiento River Flows (cfs) /1/13 5/2/13 5/3/13 5/4/13 5/5/13 5/6/13 5/7/13 5/8/13 5/9/13 5/10/13 5/11/13 5/12/13 5/13/13 5/14/13 5/15/13 5/16/13 5/17/13 5/18/13 5/19/13 5/20/13 5/21/13 5/22/13 5/23/13 5/24/13 5/25/13 5/26/13 5/27/13 5/28/13 Arroyo Seco Flows (cfs) 5/29/13 5/30/13 5/31/13 6/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 8

33 Appendix A. USGS Provisional Real Time Stream Flow. June Nacimiento River Flows (cfs) /1/13 6/2/13 6/3/13 6/4/13 6/5/13 6/6/13 6/7/13 6/8/13 6/9/13 6/10/13 6/11/13 6/12/13 6/13/13 6/14/13 6/15/13 6/16/13 6/17/13 6/18/13 6/19/13 6/20/13 6/21/13 6/22/13 6/23/13 6/24/13 6/25/13 6/26/13 6/27/13 Arroyo Seco Flows (cfs) 6/28/13 6/29/13 6/30/13 7/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 9

34 Appendix A. USGS Provisional Real Time Stream Flow. July Nacimiento River Flows (cfs) /1/13 7/2/13 7/3/13 7/4/13 7/5/13 7/6/13 7/7/13 7/8/13 7/9/13 7/10/13 7/11/13 7/12/13 7/13/13 7/14/13 7/15/13 7/16/13 7/17/13 7/18/13 7/19/13 7/20/13 7/21/13 7/22/13 7/23/13 7/24/13 7/25/13 7/26/13 7/27/13 7/28/13 Arroyo Seco Flows (cfs) 7/29/13 7/30/13 7/31/13 8/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 10

35 Appendix A. USGS Provisional Real Time Stream Flow. August Nacimiento River Flows (cfs) /1/13 8/2/13 8/3/13 8/4/13 8/5/13 8/6/13 8/7/13 8/8/13 8/9/13 8/10/13 8/11/13 8/12/13 8/13/13 8/14/13 8/15/13 8/16/13 8/17/13 8/18/13 8/19/13 8/20/13 8/21/13 8/22/13 8/23/13 8/24/13 8/25/13 8/26/13 8/27/13 8/28/13 Arroyo Seco Flows (cfs) 8/29/13 8/30/13 8/31/13 9/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 11

36 Appendix A. USGS Provisional Real Time Stream Flow. September Nacimiento River Flows (cfs) /1/13 9/2/13 9/3/13 9/4/13 9/5/13 9/6/13 9/7/13 9/8/13 9/9/13 9/10/13 9/11/13 9/12/13 9/13/13 9/14/13 9/15/13 9/16/13 9/17/13 9/18/13 9/19/13 9/20/13 9/21/13 9/22/13 9/23/13 9/24/13 9/25/13 9/26/13 9/27/13 Arroyo Seco Flows (cfs) 9/28/13 9/29/13 9/30/13 10/1/13 0 Salinas River Flows (cfs) Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 12

37 Appendix A. USGS Provisional Real Time Stream Flow. October Nacimiento River Flows (cfs) Arroyo Seco Flows (cfs) Salinas River Flows (cfs) /1/13 10/2/13 10/3/13 10/4/13 10/5/13 10/6/13 10/7/13 10/8/13 10/9/13 10/10/13 10/11/13 10/12/13 10/13/13 10/14/13 10/15/13 10/16/13 10/17/13 10/18/13 10/19/13 10/20/13 10/21/13 10/22/13 10/23/13 10/24/13 10/25/13 10/26/13 10/27/13 10/28/13 10/29/13 10/30/13 10/31/13 11/1/13 Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 13

38 Appendix A. USGS Provisional Real Time Stream Flow. November Nacimiento River Flows (cfs) Arroyo Seco Flows (cfs) Salinas River Flows (cfs) /31/13 11/1/13 11/2/13 11/3/13 11/4/13 11/5/13 11/6/13 11/7/13 11/8/13 11/9/13 11/10/13 11/11/13 11/12/13 11/13/13 11/14/13 11/15/13 11/16/13 11/17/13 11/18/13 11/19/13 11/20/13 11/21/13 11/22/13 11/23/13 11/24/13 11/25/13 11/26/13 11/27/13 11/28/13 11/29/13 11/30/13 12/1/13 Nacimiento R Bl Sapaque Nacimiento R Bl Dam Arroyo Seco Nr Soledad Arroyo Seco Bl Reliz Salinas R at Soledad Salinas R Nr Chualar Salinas R Nr Spreckels A 14

39 APPENDIX B

40

41 Appendix B. USGS Approved and Provisional Mean Daily Stream Flow. Mean Daily Stream Flow (cfs) Arroyo Seco below Reliz Creek near Soledad (October 2012 to November 2013). Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 1 0 (0) 0 (0) 526 (610) 113 (57) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 2 0 (0) 0 (0) 1,580 (1,650) 89 (40) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 3 0 (0) 0 (0) 1,140 (1,200) 69 (72) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 4 0 (0) 0 (0) 197 (267) 50 (53) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 5 0 (0) 0 (0) 78 (114) 34 (37) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 6 0 (0) 0 (0) 29 (39) 79 (81) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 7 0 (0) 0 (0) 1.7 (3.7) 116 (119) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 8 0 (0) 0 (0) 0 (0) 78 (81) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 9 0 (0) 0 (0) 0 (0) 59 (62) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 10 0 (0) 0 (0) 0 (0) 46 (49) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 11 0 (0) 0 (0) 0 (0) 37 (40) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 12 0 (0) 0 (0) 0 (0) 26 (28) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 13 0 (0) 0 (0) 0 (0) 18 (20) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 14 0 (0) 0 (0) 0 (0) 12 (14) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 15 0 (0) 0 (0) 0 (0) 6.6 (8.3) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 16 0 (0) 0 (0) 0 (0) 1.2 (4.0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 17 0 (0) 0 (0) 0 (0) 0 (1.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 18 0 (0) 0 (0) 0 (0) 0 (1.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 19 0 (0) 0 (0) 0 (0) 0 (1.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 20 0 (0) 0 (0) 0 (0) 0 (1.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 21 0 (0) 0 (0) 0 (0) 0 (1.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 22 0 (0) 0 (0) 102 (102) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 23 0 (0) 0 (0) 349 (349) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 24 0 (0) 0 (0) 2,790 (2,750) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 25 0 (0) 0 (0) 719 (550) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 26 0 (0) 0 (0) 530 (373) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 27 0 (0) 0 (0) 340 (225) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 28 0 (0) 0 (0) 235 (147) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 29 0 (0) 0 (0) 208 (127) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 30 0 (0) 512 (512) 203 (124) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 31 0 (0) 147 (83) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) Approved (Provisional) Estimate = e B 1

42 Appendix B. USGS Approved and Provisional Mean Daily Stream Flow. Mean Daily Stream Flow (cfs) Arroyo Seco near Soledad (October 2012 to November 2013). Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 1 0 (0) e7 (12) 572 (578) 283 (261) 91 (91) 53 (53) 40 (41) e15 (16) e6.5 (6.7) e0.08 (0.2) 0 (0) 0 (0) 0 (0) 0 (0) 2 0 (0) e7 (12) 2,660 (2,620) 254 (234) 88 (88) 51 (51) 40 (41) e14 (14) e6.5 (6.3) e0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 3 0 (0) e7 (12) 1,050 (1,100) 229 (229) 86 (86) 50 (50) 37 (39) e14 (13) e6.4 (5.8) e0 (0) 0 (0) 0 (0) 0 (0) 0 (0.1) 4 0 (0) e7 (12) 373 (401) 208 (208) 83 (84) 50 (50) 35 (37) e13 (13) e6.4 (5.0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.0) 5 0 (0) e7 (12) 230 (230) 192 (192) 81 (82) 49 (49) 36 (37) e14 (13) e6.4 (4.4) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.2) 6 0 (0) e7 (12) 177 (177) 284 (284) 79 (80) 54 (55) 34 (36) e15 (14) e6.2 (3.8) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.4) 7 0 (0) e7 (11) 141 (141) 277 (277) 77 (79) 66 (67) 31 (34) e14 (21) e6 (3.5) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.5) 8 0 (0) e8 (10) 119 (119) 238 (238) 78 (79) 58 (59) 31 (33) e13 (22) e5.9 (3.3) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.7) 9 0 (0) e9 (11) 104 (104) 218 (218) 78 (79) 54 (55) 30 (33) e12 (21) e5.7 (2.9) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.9) 10 0 (0) e10 (12) 92 (92) 207 (207) 73 (76) 52 (53) 29 (32) e11 (20) e5.1 (2.0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0.9) 11 0 (0) e10 (12) 85 (85) 194 (194) 72 (74) 50 (51) 28 (31) e11 (18) e4.4 (1.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (1.1) 12 0 (0) e11 (13) 80 (80) 184 (184) 70 (73) 48 (50) 27 (30) e10 (16) e3.5 (1.1) 0 (0) 0 (0) 0 (0) 0 (0) 0 (1.2) 13 0 (0) e11 (14) 75 (76) 172 (172) 69 (71) 48 (49) 27 (30) e9.9 (15) e2.8 (0.7) 0 (0) 0 (0) 0 (0) 0 (0) 0 (1.3) (0) e11 (14) 70 (70) 162 (162) 68 (70) 46 (47) 26 (30) e9.7 (13) e2.5 (0.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (3.1) (0.3) e11 (14) 66 (66) 154 (154) 66 (69) 45 (46) 25 (29) e9.6 (12) e2.3 (0.5) 0 (0) 0 (0) 0 (0) 0 (0) 0 (3.5) (2.7) e11 (17) 66 (66) 147 (147) 64 (67) 44 (46) 25 (28) e9.4 (12) e2.1 (0.9) 0 (0) 0 (0) 0 (0) 0 (0) 0 (3.7) 17 3 (3.0) e40 (37) 64 (64) 142 (142) 62 (66) 43 (44) 25 (29) e9.1 (11) e2.1 (1.0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (4.1) 18 e3 (3.1) e55 (48) 73 (73) 136 (136) 62 (67) 42 (44) 24 (28) e8.6 (13) e2.1 (2.0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (4.5) 19 e3 (3.0) e35 (29) 69 (69) 130 (130) 63 (67) 42 (43) 23 (28) e8.2 (13) e2.2 (3.5) 0 (0) 0 (0) 0 (0) 0 (0) 0 (5.1) 20 e3 (3.6) e19 (14) 64 (64) 125 (125) 71 (75) 43 (44) 23 (27) e7.8 (11) e2.2 (4.7) 0 (0) 0 (0) 0 (0) 0 (0) 0 (5.8) 21 e3 (4.0) e15 (13) 61 (62) 120 (120) 64 (68) 41 (43) 21 (26) e7.5 (8.8) e2.2 (5.6) 0 (0) 0 (0) 0 (0) 0 (0) 0 (7.0) 22 e3.5 (4.4) e15 (12) 522 (523) 116 (116) 61 (65) 40 (42) 20 (24) e7.2 (8.0) e2.1 (6.9) 0 (0) 0 (0) 0 (0) 0 (0) 0 (7.6) 23 e4.5 (5.3) e15 (12) 1,290 (1,290) 112 (112) 59 (64) 39 (41) 19 (24) e7.1 (7.1) e2 (9.3) 0 (0) 0 (0) 0 (0) 0 (0) 0 (7.8) 24 e6 (7.9) e15 (17) 2,990 (2,960) 113 (113) 57 (62) 38 (40) 20 (25) e7 (7.7) e1.8 (11) 0 (0) 0 (0) 0 (0) 0 (0) 0 (7.9) 25 e7 (9.2) e15 (19) 857 (811) 117 (117) 56 (61) 38 (40) 20 (25) e6.9 (11) e1.5 (12) 0 (0) 0 (0) 0 (0) 0 (0) 0 (8.0) 26 e7 (9.2) e15 (19) 745 (702) 112 (112) 55 (60) 38 (40) 20 (25) e6.9 (13) e1.3 (13) 0 (0) 0 (0) 0 (0) 0 (0) 0 (8.3) 27 e7 (9.4) e15 (20) 528 (494) 106 (106) 54 (59) 38 (40) e19 (25) e6.9 (12) e1.1 (13) 0 (0) 0 (0) 0 (0) 0 (0) 0 (8.7) 28 e7 (9.9) e40 (28) 415 (387) 102 (102) 53 (53) 38 (40) e18 (23) e6.8 (14) e1.1 (19) 0 (0) 0 (0) 0 (0) 0 (0) 0 (8.7) 29 e7 (10) e54 (54) 405 (377) 98 (99) 37 (37) e17 (22) e6.7 (14) e0.98 (18) 0 (0) 0 (0) 0 (0) 0 (0) 0 (8.6) 30 e7 (11) 1,290 (1,300) 381 (354) 96 (96) 36 (36) e16 (17) e6.6 (13) e0.69 (14) 0 (0) 0 (0) 0 (0) 0 (0) 0 (9.3) 31 e7 (11) 321 (297) 93 (93) 37 (38) e6.5 (8.7) 0 (0) 0 (0) 0 (0) Approved (Provisional) Estimate = e B 2

43 Appendix B. USGS Approved and Provisional Mean Daily Stream Flow. Mean Daily Stream Flow (cfs) Nacimiento River below Nacimiento Dam near Bradley (October 2012 to November 2013). Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 1 39 (39) 67 (62) 59 (61) 62 (64) 60 (60) 60 (60) 60 (60) 71 (71) 59 (63) 35 (35) 38 (38) 372 (372) 346 (346) 59 (64) 2 23 (23) 67 (62) 61 (63) 62 (64) 60 (60) 59 (59) 59 (59) 63 (63) 58 (62) 25 (25) 37 (37) 369 (369) 354 (354) 58 (62) 3 24 (24) 62 (58) 60 (62) 62 (62) 60 (60) 60 (60) 62 (62) 171 (174) 31 (31) 20 (20) 56 (57) 295 (292) 353 (354) 58 (62) 4 25 (25) 62 (58) 60 (62) 62 (62) 60 (60) 59 (59) 64 (64) 258 (265) 32 (31) 337 (336) 304 (304) 141 (131) 353 (353) 59 (59) 5 34 (34) 64 (64) 60 (62) 62 (62) 60 (60) 61 (61) 64 (64) 259 (266) 39 (39) 416 (416) 373 (373) 217 (216) 352 (352) 60 (60) (210) 69 (69) 60 (62) 62 (62) 60 (60) 64 (64) 63 (63) 223 (229) 48 (48) 417 (417) 411 (411) 360 (291) 353 (353) 60 (60) (350) 66 (66) 60 (62) 62 (62) 60 (60) 64 (64) 64 (64) 169 (175) 62 (62) 265 (265) 409 (409) 366 (366) 351 (351) 60 (60) (350) 60 (60) 70 (72) 61 (61) 59 (59) 64 (64) 63 (63) 169 (175) 61 (61) 41 (40) 409 (409) 368 (368) 355 (355) 60 (60) (347) 60 (60) 71 (73) 61 (61) 59 (59) 69 (69) 61 (61) 169 (175) 61 (61) 42 (42) 409 (409) 368 (368) 353 (353) 61 (61) (351) 60 (60) 65 (67) 61 (61) 60 (60) 68 (68) 63 (63) 169 (175) 43 (43) 58 (57) 407 (407) 368 (368) 350 (350) 61 (61) (350) 60 (60) 59 (61) 60 (60) 59 (59) 67 (67) 64 (64) 168 (174) 29 (29) 241 (241) 405 (405) 367 (367) 349 (349) 62 (62) (343) 60 (60) 60 (62) 61 (61) 71 (71) 66 (66) 64 (64) 168 (174) 27 (27) 415 (415) 380 (379) 367 (367) 349 (349) 62 (62) (338) 59 (59) 58 (60) 62 (62) 69 (69) 65 (65) 65 (64) 169 (174) 43 (42) 415 (415) 195 (188) 367 (367) 353 (353) 61 (61) (346) 60 (60) 58 (60) 60 (60) 68 (68) 65 (65) 66 (63) 160 (165) 64 (64) 414 (414) 46 (39) 366 (366) 353 (353) 62 (62) (364) 60 (60) 58 (60) 60 (60) 64 (64) 64 (64) 64 (62) 84 (89) 62 (62) 392 (392) 48 (40) 365 (365) 353 (353) 62 (62) (357) 60 (60) 58 (60) 60 (60) 63 (63) 65 (65) 63 (61) 56 (60) 62 (62) 231 (231) 73 (62) 350 (350) 306 (305) 62 (62) (331) 61 (61) 58 (60) 60 (60) 63 (63) 65 (65) 62 (59) 56 (60) 61 (61) 37 (36) 45 (38) 363 (363) 188 (188) 62 (62) (364) 62 (62) 60 (62) 60 (60) 63 (63) 65 (65) 63 (61) 56 (60) 34 (34) 43 (42) 73 (62) 364 (364) 98 (100) 60 (62) (334) 61 (61) 60 (62) 60 (60) 63 (63) 64 (64) 64 (62) 56 (60) 26 (26) 43 (42) 74 (63) 364 (364) 53 (55) 60 (62) (260) 61 (61) 60 (62) 60 (60) 63 (63) 64 (64) 64 (62) 56 (60) 26 (26) 38 (38) 79 (67) 364 (364) 52 (54) 61 (63) (246) 61 (61) 60 (62) 60 (60) 63 (63) 64 (64) 63 (61) 56 (60) 48 (48) 39 (38) 55 (46) 363 (363) 58 (61) 62 (64) (168) 62 (62) 61 (63) 60 (60) 63 (63) 64 (64) 62 (60) 57 (61) 71 (71) 38 (37) 63 (53) 360 (360) 62 (67) 61 (63) (69) 61 (61) 61 (63) 61 (61) 63 (63) 64 (64) 61 (59) 57 (61) 71 (71) 36 (36) 54 (46) 359 (359) 59 (65) 61 (63) (61) 61 (61) 62 (64) 61 (61) 63 (63) 63 (63) 62 (60) 56 (61) 40 (40) 36 (36) 75 (64) 361 (361) 59 (64) 61 (63) (64) 62 (62) 62 (64) 61 (61) 63 (63) 63 (63) 63 (61) 57 (62) 25 (25) 64 (64) 75 (64) 361 (361) 58 (62) 61 (63) (63) 61 (61) 62 (64) 61 (61) 62 (62) 62 (62) 62 (60) 58 (62) 34 (34) 112 (112) 160 (152) 361 (361) 58 (62) 61 (63) (63) 61 (61) 61 (64) 62 (62) 62 (62) 62 (62) 64 (62) 57 (61) 63 (63) 105 (105) 201 (194) 361 (361) 58 (62) 60 (62) (64) 146 (148) 62 (64) 61 (61) 61 (61) 61 (61) 62 (60) 51 (54) 63 (63) 105 (105) 66 (56) 360 (360) 58 (63) 60 (62) (62) 69 (71) 62 (64) 61 (61) 61 (61) 61 (59) 33 (35) 65 (65) 53 (53) 56 (48) 360 (360) 59 (64) 60 (62) (62) 59 (61) 62 (64) 62 (62) 60 (60) 62 (60) 59 (63) 67 (67) 54 (54) 265 (260) 359 (359) 60 (66) 60 (62) (62) 62 (64) 62 (62) 60 (60) 59 (63) 39 (39) 373 (373) 58 (62) Approved (Provisional) Estimate = e B 3