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Volume 2012/13, Issue 9
| February 26, 2013 |
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State of the California Central Coast:February 27 - March 1 31st Annual Salmonid Restoration Conference:
March 13-16
47th Annual Cal-Neva Conference:
April 4-6
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Key Highlights
February 4, 2013 - February 17, 2013
Calaveras River Juvenile Migration Monitoring continued at Shelton Road (RM 28) and a total of 5 O. mykiss were captured, increasing the season total to 97.
Stanislaus River Juvenile Migration Monitoring continued at Oakdale (RM 40) and a total of 57,164 Chinook salmon were captured, increasing the season totals to 106,310. Monitoring at Caswell Memorial State Park (RM 9) continued and a total of 6,945 Chinook salmon were captured, increasing the season total to 8,752. Tuolumne River Juvenile Migration Monitoring continued at Waterford (RM 30) and a total of 359 Chinook salmon were captured, increasing the season total to 1,499. Monitoring continued at Grayson (RM 5) and no Chinook salmon were captured. Season total remains at one. Mokelumne River Juvenile Migration Monitoring continued at Vino Farms (RM 54) and a total of 20,531 Chinook salmon were captured, increasing the season total to 30,718. Monitoring continued at Golf (RM 38) and a total of 864 Chinook salmon were captured, increasing the season total to 1,028. Stanislaus River Weir Monitoring continued and 5 Chinook salmon passed upstream through the weir between February 4 and February 17, increasing the total to 7,049. Tuolumne River Weir Monitoring continued with a total of 2 Chinook salmon passing upstream through the weir between February 4 and February 17, increasing the total to 2,120. San Joaquin River Conditions. San Joaquin River flow at Vernalis ranged from 1,858 cfs to 2,436 cfs. Daily average water temperature in the San Joaquin River ranged from 49.5�F to 53.1�F at Vernalis, and from 50.2�F to 53.9�F at Mossdale. Daily average dissolved oxygen (DO) in the San Joaquin River ranged from 10.6 mg/L to 11.1 mg/L at Mossdale, and from 9.2 mg/L to 10.0 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island). Delta Exports. Combined total exports (state and federal pumps) fluctuated during the reporting period, ranging from 2,622 cfs to 4,019 cfs.
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2011/12 Calaveras River Juvenile Migration Monitoring
The Calaveras River rotary screw trap at Shelton Road (RM 28) operated eight days between February 4 and February 17 and a total of 5 O. mykiss were captured,  increasing the total to 97. Daily catches ranged from zero to two individuals (Figure 1), and all O. mykiss captured were Age 1+ (100-299 mm) and were rated as parr (n=3) and silvery parr (n=2). Average forklengths and weights of O. mykiss are provided in Table 1.
No Chinook salmon were captured during this reporting period. The season total remains at two yearlings.
Instantaneous temperature recorded at the trap ranged from 47.1�F to 50.3�F, and turbidity ranged from 0.45 NTU to 3.29 NTU. During the reporting period, daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) fluctuated between 23 cfs and 25 cfs, and at Bellota (MRS) flow fluctuated between 10 cfs and 21 cfs (Figure 1).
Table 1. Biosampling data for O. mykiss captured at Shelton Road between February 3 and February 17, 2013. Parenthesis indicates range. 
Figure 1. Daily O. mykiss catch at Shelton Road, and Calaveras River flow recorded by New Hogan Dam (NHG) and Cosgrove Creek (COS) combined and flow recorded at Bellota (MRS), in 2012 and 2013.
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2011/12 Stanislaus River Juvenile Migration Monitoring
 Stanislaus River rotary screw trap monitoring at Oakdale (RM 40) continued during the reporting period and a total of 57,164 Chinook salmon were captured, increasing the season total to 106,310. Most of the Chinook salmon measured were fry (n=998), but parr (n=2) were also observed (Table 2).
No O. mykiss were captured during the reporting period. The season total remains at 21.
Table 2. Biosampling data for Chinook salmon and O. mykiss captured and measured at Oakdale between February 4 and February 17, 2013. Parentheses indicate range.
Instantaneous temperature taken at the trap ranged from 46.5�F to 52.8�F, and turbidity ranged from 1.11 NTU to 3.64 NTU. Daily average flow at Goodwin Dam (GDW) ranged from 908 cfs to 1,517 cfs, and flow ranged from 813 cfs to 1,449 cfs at Ripon (RIP) (Figure 2).
Three trap efficiency evaluations were conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin green (CFG). The preliminary estimated capture efficiencies are provided in Table 3.
Table 3. Trap efficiency tests conducted at Oakdale between February 4 and February 17, 2013.  Figure 2. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam (GDW) and Ripon (RIP) in 2013. Stanislaus River rotary screw trap monitoring at Caswell Memorial State Park (RM 9) continued during the reporting period and a total of 6,945 juvenile Chinook salmon were captured during the reporting period including six parr and 6,939 fry bringing the season total to 8,744 fry, six parr, and two yearling smolts. One O. mykiss (FL=71mm) was captured, increasing the season total to two. Instantaneous temperature taken at the trap ranged from 48.9�F to 53.6�F, and instantaneous turbidity ranged from 3.14 NTU to 6.63 NTU. Instantaneous dissolved oxygen measured at the trap ranged from 10.82 mg/L to 13.03 mg/L.
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2012 Tuolumne River Juvenile Migration Monitoring
Tuolumne River rotary screw trap monitoring at Waterford (RM 30) continued during the reporting period and a total of 359 Chinook salmon were captured, increasing the season total to 1,499. Most of the measured fish were fry (n=339) but parr (n=7) were observed (Table 4).
Table 4. Biosampling data for Chinook salmon captured and measured at Waterford between February 4 and February 17, 2013. Parentheses indicate range. Instantaneous temperature taken at the trap ranged from 49.2�F to 55.4�F, and turbidity ranged from 0.40 NTU to 2.15 NTU. Daily average flow at La Grange (LGN) was stable between 164 cfs and 179 cfs (Figure 3). Two trap efficiency evaluations were conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin orange (CFO). Preliminary estimated capture efficiencies are provided in Table 5. Table 5. Trap efficiency tests conducted at Waterford between February 4 and February 17, 2013. 
Figure 3. Daily Chinook salmon catch at Waterford and Tuolumne River flow recorded at La Grange (LGN) between January 1 and February 17, 2013.
Tuolumne River rotary screw trap monitoring at Grayson (RM 5) continued during the reporting period and no Chinook salmon were captured. Season total remains at one.
Instantaneous temperature taken at the trap ranged from 50.1�F to 60.0�F, and turbidity ranged from 0.55 NTU to 5.99 NTU. Daily average flow at Modesto (MOD) ranged between 181 cfs and 198 cfs (Figure 4).
No trap efficiency evaluations were conducted during the reporting period. 
Figure 4. Daily Chinook salmon catch at Grayson and Tuolumne River flow recorded at Modesto (MOD) between January 1 and February 17, 2013.
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2011/12 Mokelumne River Juvenile Migration Monitoring
The Mokelumne River rotary screw trap at Vino Farms (RM 54) continued sampling intermittently during the reporting period. A total of 20,531 juvenile Chinook salmon were captured, increasing the season total to 30,718.
Average daily flow from Camanche Reservoir (CMN) ranged from 254 cfs to 292 cfs (Figure 5). Instantaneous temperature ranged between 47.1�F and 48.0�F, and instantaneous turbidity ranged between 1.59 NTU and 2.09 NTU.
Figure 5. Daily juvenile Chinook catches at Vino Farms and Mokelumne River flow recorded at Camanche Reservoir (CMN), between December 1, 2012, and February 17, 2013.
The Mokelumne River rotary screw trap at Golf (RM 38) continued sampling intermittently during the reporting period. A total of 864 juvenile Chinook salmon were captured, increasing the season total to 1,028.
Average daily flow from Woodbridge Dam (WBR) ranged from 137 cfs to 194 cfs (Figure 6). Instantaneous temperature ranged between 48.2�F and 50.2�F, and instantaneous turbidity ranged between 3.41 NTU and 7.46 NTU.
Figure 6. Daily juvenile Chinook catches at Golf and Mokelumne River flow recorded at Woodbridge Dam (WBR), between December 15, 2012, and February 17, 2013.
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2011 Stanislaus River Weir Adult Migration Monitoring
Between February 4 and February 17, five Chinook salmon were detected by the Vaki Riverwatcher as they passed upstream of the Stanislaus River weir.The total passage to-date of 7,049 is the highest observed at the Stanislaus weir since monitoring began in 2003 (Figure 5; Table 6). Daily passage ranged between 0 and 3 Chinook salmon (Figure 7).
Five O. mykiss were detected passing upstream, increasing the season total to 57.
Instantaneous water temperature measured at the weir ranged between 48.9˚F and 53.0˚F, and daily average water temperature at Ripon (RPN; RM 15) ranged between 49.8˚F and 54.2˚F (Figure 8). Instantaneous turbidity ranged between 1.28 NTU and 8.79 NTU (Figure 9). Instantaneous dissolved oxygen at the weir ranged between 9.77 mg/L and 13.52 mg/L, and daily average dissolved oxygen at Ripon (RPN; RM 15) ranged from 10.00 mg/L to 10.70 mg/L (Figure 10).
Daily average flows in the Stanislaus River at Goodwin Dam (GDW; RM 58) ranged from 908 cfs to 1,517 cfs. Flows at Ripon (RIP; RM 15) ranged from 813 cfs to 1,449 cfs. Note: flows downstream of Goodwin Dam may differ from dam releases due to irrigation, precipitation, and other factors.
Table 6. Annual fall-run Chinook passage at the Stanislaus River weir prior to February 17, 2003-2013.
  Figure 7. Daily upstream Chinook passage at the Stanislaus River weir in relation to daily average flows (cfs) recorded in the Stanislaus River at Goodwin (GDW) and Ripon (RIP), 2012/13. Figure 8. Daily upstream Chinook passage recorded at the Stanislaus River weir in relation to instantaneous water temperature recorded at the weir, and daily average water temperature recorded in the Stanislaus River at Ripon (RPN), and in the San Joaquin River at Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI) in 2012/13. Figure 9. Daily upstream Chinook passage at the Stanislaus River weir in relation to instantaneous turbidity recorded at the weir in 2012/13. (Note: Turbidity on December 24 was measured at 106.0 NTU.) Figure 10. Daily upstream Chinook passage at the Stanislaus River weir in relation to instantaneous dissolved oxygen recorded at the weir, and daily average dissolved oxygen recorded in the Stanislaus River at Ripon (RPN), and in the San Joaquin River at Mossdale (MSD) and Rough & Ready (RRI) in 2012/13.
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2011 Tuolumne River Weir Adult Migration Monitoring
B etween February 4 and February 17 a total of 2 Chinook salmon were detected by the Vaki Riverwatcher as they passed upstream of the Tuolumne River weir. Total passage to-date of 2,120 is less than the 2,850 passages observed in 2011 at the Tuolumne weir (Table 7). Daily passage, ranged between 0 and 1 Chinook salmon (Figure 11).
No O. mykiss were detected during the reporting period. Season total remains at three.
Daily average flow in the Tuolumne River ranged from 164 cfs to 179 cfs at La Grange (LGN; RM 50) and 181 cfs and 198 cfs at Modesto (MOD; RM 17). Note: flows downstream of La Grange may be higher than dam releases due to accretion and Dry Creek inflow.
Instantaneous water temperature measured at the weir ranged between 54.1˚F and 55.7˚F and daily average water temperature at Modesto (MOD; RM 17) ranged between 51.1˚F and 54.3˚F (Figure 12). Instantaneous turbidity ranged between 1.18 NTU and 1.94 NTU (Figure 13), and instantaneous dissolved oxygen ranged between 11.12 mg/L and 11.47 mg/L (Figure 14).
Table 7. Annual Fall-run Chinook passage prior to February 17, 2009 - 2013.
Figure 11. Daily upstream Chinook passage at the Tuolumne River Weir in relation to daily average flows (cfs) recorded in the Tuolumne River at La Grange (LGN) and Modesto (MOD), and in the San Joaquin River at Vernalis (VNS) in 2012/13.
Figure 12. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous water temperature recorded at the weir, and daily average water temperature recorded in the Tuolumne River at Modesto (MOD) and in the San Joaquin River at Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI) in 2012/13.
Figure 13. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous turbidity recorded at the weir in 2012/13.
Figure 14. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous dissolved oxygen recorded at the weir, and daily average dissolved oxygen recorded in the San Joaquin River at Mossdale (MSD) and Rough & Ready (RRI) in 2012/13.
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San Joaquin River Conditions
During the reporting period, flow in the San Joaquin River at Vernalis fluctuated from 1,858 cfs to 2,436 cfs (Figure 16). Water temperature in the San Joaquin River ranged from 49.5�F to 53.1�F at Vernalis, from 50.2�F to 53.9�F at Mossdale, and from 50.5�F to 52.5�F at Rough 'n Ready Island (Figure 17). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 9.2 mg/L to 10.0 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island), and from 10.6 mg/L to 11.1 mg/L at Mossdale (Figure 18).
Figure 16. San Joaquin River flow at Vernalis from February 1, 2012, through February 17, 2013.
Figure 17. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready from February 1, 2012, through February 17, 2013.
Figure 18. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n Ready, from February 1, 2012, through February 17, 2013.
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Delta Exports
Mean daily pumping at the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping Plant) ranged from 1,609 cfs to 2,494 cfs (Figure 19). Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) ranged from 1,013 cfs to 1,525 cfs. Combined total exports (state and federal pumps) during this period ranged from 2,622 cfs to 4,019 cfs.
Figure 19. Daily exports at the state and federal pumping stations from February 1, 2012, through February 17, 2013.
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