Draft 5/11/2012 Temperature and Release Summary for Shasta and Trinity - April 2012

(Updated twice a week November through April)

Sacramento River Water Temperatures in Degrees F

Day Collected from CDEC (California Data Exchange Center) in CFS

Control Control

TCD SHD minus Point Point Shasta Spring Crk 

Wt. TCD 4/16 to 4/30 6/1 to 4/15 Generation Powerplant 

Avg. (Diff) Shd Spp Kwk Bsf Jlf Bnd Rdb Lws Ccr Igo El 815 Release 

Mar 48.3 47.9 46.9 47.9 49.6 49.9 49.9 50.5 46.6 48.6 47.2 2,270 961 

Apr

1 48.5 (0.6) 47.9 47.3 48.5 50.7 50.6 50.5 51.5 47.6 49.6 48.3 756 1,489 

2 48.9 (0.7) 48.2 47.3 48.7 51.5 51.3 51.3 52.0 48.4 50.1 48.5 1,772 1,412 3 48.9 (0.7) 48.2 47.5 48.9 52.3 52.4 52.4 53.0 48.1 50.3 48.9 1,137 1,344 4 49.0 (0.6) 48.4 47.5 49.0 51.8 52.1 52.3 53.1 47.5 49.7 47.9 1,085 1,499 5 49.3 (0.9) 48.4 47.6 49.0 50.7 50.8 51.0 52.0 46.8 49.6 47.1 1,703 831 6 49.2 (0.7) 48.5 47.7 49.1 50.8 50.8 51.1 51.9 48.4 50.0 47.6 2,115 910 7 49.3 (0.7) 48.6 48.0 49.2 51.3 51.6 51.9 52.3 48.3 49.8 47.8 2,356 502 8 49.3 (0.5) ? 48.8 48.1 49.4 51.5 51.8 51.9 52.7 48.8 50.5 48.8 1,862 516 9 49.6 (0.7) ? 48.9 47.9 49.5 52.9 53.5 53.8 54.0 49.4 50.7 49.2 2,155 558 

10 49.9 (1.1) ? 48.8 47.9 49.6 51.9 52.6 53.1 54.0 48.8 50.0 48.5 2,246 477 11 49.6 (0.6) 49.0 47.8 49.4 52.2 52.1 52.2 53.0 48.6 50.4 48.8 2,511 533 12 48.9 (1.0) ? 47.9 47.8 49.4 52.0 52.3 52.6 53.0 48.9 50.2 48.5 2,497 516 13 48.9 (0.2) 48.7 47.7 49.3 51.2 51.4 51.7 52.3 48.3 49.9 48.3 1,759 1,126 14 49.4 (0.5) 48.9 47.7 49.3 52.0 51.9 51.8 51.9 49.3 50.9 49.6 1,922 1,087 15 49.6 (0.1) 49.5 48.1 49.3 54.4 55.0 55.2 55.5 50.4 51.5 50.6 1,382 996 16 49.5 (0.6) 48.9 48.3 49.6 55.1 56.2 56.6 57.3 50.9 51.6 51.0 2,427 542 17 49.5 (0.5) ? 49.0 48.1 50.3 53.9 55.0 55.5 56.8 50.6 51.4 50.5 2,207 541 18 49.8 0.1 ? 49.9 48.2 50.4 53.9 54.9 55.2 56.1 50.9 51.6 50.5 3,405 384 19 50.2 (0.2) ? 50.0 48.1 50.5 55.4 56.5 56.8 57.8 51.9 52.5 51.7 4,135 489 20 50.6 (0.9) ? 49.7 48.1 50.6 56.5 58.3 58.8 60.0 52.6 53.0 52.6 4,013 534 

21 50 0 49 6 48 3 51 2 56 9 59 0 59 6 61 3 51 8 53 1 52 9 3 649 526 

Mean Daily Relea

21 50.0 (0.4) ? 49.6 48.3 51.2 56.9 59.0 59.6 61.3 51.8 53.1 52.9 3,649 526 

22 50.3 (0.1) ! 50.2 48.1 51.6 57.5 59.6 60.1 61.7 52.3 53.8 53.3 3,906 526 23 50.3 (0.4) ? 49.9 48.0 51.4 57.9 60.1 60.8 62.4 52.8 53.7 53.5 5,241 1,019 24 50.1 (0.7) 49.4 48.2 51.2 55.8 57.9 58.8 61.0 52.3 52.7 52.0 4,740 1,004 25 50.3 (1.1) 49.2 48.2 50.6 54.3 55.9 56.5 58.0 51.5 51.8 50.9 4,388 1,159 26 49.5 (0.6) 48.9 48.2 50.4 54.5 55.5 55.8 57.0 51.9 52.0 51.7 4,045 1,026 27 50.9 (1.3) 49.6 48.4 50.4 53.3 54.3 54.8 56.4 51.5 51.6 50.0 4,265 1,024 28 51.7 (1.6) 50.1 48.4 50.3 54.0 54.9 55.2 56.2 51.1 52.1 51.4 4,422 1,003 29 52.2 (1.9) ? 50.3 48.4 51.0 55.3 56.8 57.2 58.4 50.8 52.7 52.2 4,214 1,000 30 51.2 (1.2) 50.0 48.5 51.9 55.9 57.6 58.2 59.5 49.5 53.2 51.9 4,428 924 

0.0

Avg 49.8 49.1 48.0 50.0 53.6 54.4 54.8 55.7 50.0 51.3 50.2 2,891 850 Tot cfs 86,743 25,497 Tot af 172,055 50,573 

# = Station out of service ^ - estimated (7 hours or less available) ? = Avg. includes estimated data! = 17 hours or less of readings & = 18 to 23 hours of reading ND = No hourly readings or incorrect 

Control Point: Jelly's Ferry 6/1/2011 to 4/15/2012; Balls Ferry 4/16/2012 to 4/30/2012.NOTE: On 7/19/2011 the probe for SHD was extended farther out into the river so at low flows

 it should no longer be exposed to the air. 8/2/2011 the extended pipe floated away.  Some hourly readings for SHD are questionable again and are being estimated.On 4/23/2012 the pipe extension was comleted. On 4/24/2012 at 0900 a newly calibrated probe was installed.

V:\~WATER\_res_ops\Tempmodel\~sactemp\2012TempFiles\[04_2012 Monthly Summary.xls]Sac Riv Temps