5/3/2011 Temperature and Release Summary for Shasta and Trinity - April 2011

(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

TCD SHD minus Point Shasta Spring Crk 

Wt. TCD 3/1 to 4/30 Generation Powerplant 

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

Mar Avg 48.5 48.1 47.2 47.9 48.8 48.7 49.0 49.5 46.5 48.3 47.7 9,314 1,189 

Apr

1 49.4 (1.3) 48.1 48.3 48.5 49.5 49.9 49.9 51.0 47.9 48.6 51.0 15,499 2,016 

2 49.8 (1.2) 48.6 48.8 48.6 49.7 50.1 50.1 51.2 48.0 48.8 50.6 15,496 2,012 3 49.9 (1.2) 48.7 48.5 49.0 49.8 49.7 49.7 50.5 47.9 49.1 48.5 15,543 1,922 4 49.8 (1.3) 48.5 48.4 49.0 50.0 50.0 49.9 51.0 48.4 49.2 49.6 15,462 1,874 5 49.8 (1.3) 48.5 48.3 48.8 50.2 50.5 50.5 51.6 49.1 49.1 50.4 15,380 1,429 6 49.7 (1.3) 48.4 49.3 48.9 50.0 50.3 50.3 51.3 49.0 49.1 49.4 15,232 1,571 7 49.4 (1.3) 48.1 48.3 48.4 49.4 49.5 49.6 50.6 49.0 48.6 47.6 14,772 1,281 8 49.8 (1.3) 48.5 46.3 48.4 49.0 48.6 48.6 49.2 49.7 48.7 47.6 13,410 1,506 9 50.0 (1.2) 48.8 47.3 49.1 49.8 49.6 49.6 50.2 50.0 49.5 48.5 12,576 1,332 

10 49.8 (1.1) 48.7 47.7 49.2 50.6 50.6 50.6 51.4 50.0 49.8 49.0 11,202 1,294 11 49.7 (1.1) 48.6 48.4 49.1 51.3 51.6 51.6 52.5 50.1 50.0 50.0 9,356 1,153 12 50.2 (1.7) 48.5 48.7 49.2 51.5 51.9 52.0 53.2 50.0 50.1 50.1 8,099 1,065 13 49.9 (1.6) 48.3 48.2 49.7 51.4 51.8 51.9 52.8 49.8 50.3 49.1 7,586 1,159 14 50.3 (1.6) 48.7 49.0 49.2 51.6 51.9 52.0 53.0 50.5 50.1 48.9 5,258 1,282 15 50.7 (1.5) 49.2 48.7 49.2 51.4 52.0 52.3 53.5 50.3 50.0 49.5 4,658 1,280 16 50.9 (1.0) 49.9 48.8 49.6 52.5 53.1 53.1 54.2 50.1 50.8 50.9 4,672 1,087 17 50.7 (1.2) 49.5 49.7 50.2 53.1 54.3 54.5 55.8 49.8 51.0 50.8 5,830 50 18 50.1 (1.3) 48.8 48.7 50.6 53.5 54.0 54.3 55.4 50.1 51.9 51.0 5,183 606 19 50.9 (1.1) 49.8 49.2 50.3 53.8 54.0 ? 54.4 55.5 50.4 51.8 50.8 4,407 1,333 

20 51.3 (1.4) 49.9 48.9 50.0 52.6 53.2 54.1 55.2 50.2 50.8 50.0 4,723 1,194 

21 51.7 (1.4) 50.3 49.1 50.5 53.1 53.0 53.4 53.7 51.1 51.7 50.3 4,310 1,184 22 52.1 (1.7) 50.4 49.1 50.7 53.2 53.5 54.2 54.8 51.7 51.7 50.1 4,870 625 23 51.5 (1.5) 50.0 49.5 51.3 53.3 53.6 54.3 54.8 50.9 51.9 50.1 5,298 124 24 50.7 (1.2) 49.5 49.7 51.5 54.0 54.1 54.7 55.1 50.6 52.9 51.2 5,578 125 25 49.7 0.1 49.8 51.7 51.2 54.6 55.0 55.8 56.1 50.2 52.4 50.8 5,916 47 26 50.3 (1.0) 49.3 49.6 50.4 ? 53.1 53.6 54.4 55.5 50.6 52.0 50.1 5,939 50 

27 51.0 (1.0) 50.0 49.5 49.9 53.1 54.3 55.0 56.0 51.3 51.4 51.1 5,578 81 

28 50.7 (1.0) 49.7 49.8 51.1 53.1 54.3 55.1 55.8 51.6 52.0 50.6 6,332 50 29 51.3 (1.1) 50.2 49.7 51.2 52.7 53.4 54.1 54.7 51.7 52.2 49.9 4,732 1,303 30 52.2 (0.9) 51.3 49.8 51.0 52.9 53.6 54.2 54.9 50.9 52.3 50.3 4,904 1,342 

0.0

Avg 50.4 49.2 48.9 49.8 51.8 52.2 52.5 53.4 50.0 50.6 49.9 8,593 1,046 Tot cfs 257,801 31,377 Tot af 511,348 62,236 

# = 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: Balls Ferry 3/1/2011 to 4/30/2011.NOTE: Many hourly readings for SPP are questionable.* Many hourly readings for SHD are questionable. It looks like some readings may actually be air temperatures.

Mean Daily Releas