Report Generated 10/01/2021 at 0722

Page Description

2 - Mean Daily Water Temperature, Release Flow Rates and Air Temperatures with Monthly Averages

3 - Redding 10-Day Forecasted Air Temperatures

4 - Sacramento River Mean Daily Water Temperature, Air Temperature and 10-Day Forecasted Air Temperature Plot

- Water Temperature Measuring Station Details

- Temperature Control Point Details

5 - Shasta Lake Isothermobaths & Cold Water Pool Statistics

14 - Trinity Lake Isothermobaths & Cold Water Pool Statistics

23 - Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

x - TCD Configuration (External Link)

All Data in this Report is Preliminary and Subject to Change

Northern CVP Water Temperature Report

September - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Aug 5889 1760 8088 76.7 77.9

09/01 55.8 55.5 # - 56.0 56.6 57.3 58.5 59.5 60.5 61.5 56.6 51.0 # - 57.8 4786 1022 6826 75.0 69.5 70.3

09/02 56.0 55.6 # - 56.2 56.7 57.5 58.6 59.5 60.3 61.3 56.5 51.2 # - 59.3 5123 889 6824 72.0 67.4 68.6

09/03 55.9 55.5 # - 56.2 56.7 57.4 58.4 59.3 60.1 61.1 56.2 51.4 # - 58.0 5609 949 6823 74.0 68.9 69.5

09/04 56.0 55.6 # - 56.2 56.9 57.6 58.7 59.5 60.2 61.1 56.4 51.6 # - 56.4 5348 1093 6805 76.0 70.9 74.5

09/05 56.0 55.7 # - 56.3 56.9 57.7 58.7 59.6 60.4 61.4 56.5 51.9 # - 55.0 5686 1036 6798 78.0 71.1 74.7

09/06 55.9 55.6 # - 56.3 56.9 57.7 58.8 59.7 60.5 61.5 56.7 51.3 # - 54.1 5683 1034 6801 80.5 72.9 77.7

09/07 56.2 56.0 # - 56.4 57.1 58.0 59.2 60.2 61.0 61.9 57.3 50.7 # - 54.4 5635 1062 6860 85.0 77.5 83.4

09/08 56.3 55.8 # - 56.5 57.0 57.8 59.2 60.4 61.4 62.5 57.1 51.0 # - 54.9 5733 1208 6862 87.0 78.5 83.5

09/09 56.8 56.5 # - 56.4 56.9 57.5 58.7 59.7 60.6 61.8 57.0 51.0 # - 55.5 5058 1080 6821 83.5 77.2 80.1

09/10 56.4 56.4 # - 56.5 57.3 58.1 59.6 60.6 61.4 62.3 58.3 50.6 # - 56.8 5186 1087 6833 79.5 76.7 77.8

09/11 56.1 56.0 # - 56.8 57.5 58.2 59.7 60.8 61.7 63.0 57.7 50.8 # - 58.6 5311 1072 6824 80.5 74.6 76.1

09/12 56.8 57.0 # - 56.6 57.2 57.9 59.3 60.4 61.2 62.4 57.5 51.0 # - 59.0 4718 1786 6824 78.0 71.5 74.3

09/13 57.2 57.4 # - 56.7 57.3 57.9 59.2 60.1 60.9 61.9 57.6 51.1 # - 58.6 4632 1803 6818 81.0 73.8 76.9

09/14 57.4 58.2 # - 56.9 57.5 58.1 59.3 60.2 61.0 61.9 57.7 50.9 # - 58.6 4821 1795 6817 83.0 74.9 78.0

09/15 57.5 58.2 # - 57.1 57.7 58.3 59.5 60.5 61.3 62.2 57.5 51.0 # - 58.4 4925 1668 6824 79.5 72.9 74.8

09/16 58.3 57.8 # - 57.1 57.7 58.4 59.6 60.4 61.1 62.1 57.3 51.1 # - 58.9 4605 1688 6820 76.0 70.5 71.2

09/17 58.3 57.4 # - 57.1 57.6 58.2 59.3 60.2 61.0 61.9 56.9 51.5 # - 59.1 4614 1697 6821 73.0 68.9 71.2

09/18 58.0 56.9 # - 57.3 57.5 57.6 58.5 59.2 60.0 60.8 56.0 51.2 # - 57.8 5157 1733 6822 66.0 61.9 64.0

09/19 58.1 57.1 # - 57.0 57.6 58.2 59.1 59.5 60.0 60.2 56.8 51.2 # - 57.7 5204 1680 6843 69.0 66.2 69.1

09/20 58.9 57.9 # - 57.2 57.7 58.1 59.0 59.6 60.3 61.0 56.5 51.5 # - 58.2 4561 1712 6830 79.5 74.3 76.6

09/21 58.9 58.1 # - 57.4 57.9 58.4 59.4 60.0 60.6 61.2 56.6 51.8 ! - 58.4 4743 1861 6852 75.5 69.5 73.2

09/22 59.7 58.9 # - 57.7 58.1 58.7 59.6 60.3 61.0 61.7 56.2 51.5 55.4 58.9 4151 2090 6845 76.5 69.9 74.0

09/23 59.6 58.3 # - 58.0 58.3 58.8 59.9 60.6 61.2 61.9 55.9 51.4 55.0 59.0 4574 1729 6808 86.0 73.4 79.3

09/24 59.4 58.2 # - 57.9 58.3 58.9 60.0 60.6 61.4 62.2 56.3 51.2 55.2 58.9 4933 1845 6799 79.5 73.0 77.8

09/25 60.2 58.8 # - 58.0 58.5 59.0 59.9 60.6 61.3 62.2 56.2 51.6 55.3 59.4 4345 1755 6799 74.5 69.1 73.0

09/26 60.6 59.9 # - 58.1 58.6 59.0 59.9 60.6 61.2 62.0 56.0 51.7 55.2 59.0 4002 1750 6835 70.5 65.5 68.5

09/27 60.4 58.8 # - 58.4 58.5 58.7 59.5 60.1 60.8 61.4 55.5 51.8 53.7 57.0 4537 1765 6842 64.0 61.9 63.9

09/28 60.3 59.1 # - 58.1 58.5 58.7 59.3 59.5 60.0 60.3 55.4 51.7 52.8 55.7 5024 1669 6928 63.5 61.3 64.3

09/29 60.5 59.6 # - 58.1 58.5 58.8 59.3 59.6 60.0 60.3 55.7 51.5 53.5 56.2 4980 1772 6964 73.5 65.8 69.7

09/30 ? 61.1 ? 59.9 # - ? 58.3 ? 58.7 ? 59.1 ? 59.6 ? 60.0 ? 60.4 ? 60.7 ? 55.9 ? 51.2 53.5 ? 56.6 4353 1733 6895 73.0 65.7 70.8

-

Sep 4935 1502 6835 70.5 73.6

148037 45063 205063

Legend Notes 293625 89381 406734

? = 1-9 hours of data missing (Average includes estimations) 1 Temperatures are weighted averages based on individual penstock flow and temperature

! = 10 or more hours of data missing (Average not calculated) Highlighted cells in the TCD column indicate a TCD change was made on that day

# = Station out of service 2 Current Sacramento River control point (see page 4 for more details)

↑ = Record high air temperature 3 Data is currently being collected locally and periodically downloaded.

↓ = Record low air temperature Once downloaded and certified by USGS, missing data will be added.

 = Monthly Averages

Total AF

60.7 57.1

RDB

61.6 56.7

LWS

51.3 54.4

DGC3

-

Mean Daily Air 

Temperatures (°F)

RDD

82.6

Total CFS

57.5 76.4

Mean Daily 

Release (CFS)

NFH

59.5

Mean Daily Water Temperatures (°F)

50.4

JLF BND IGO

57.1

BSF

- 55.0 55.5 56.2 57.4 58.6 59.5

D

A

T

E

54.1 53.4

SAC CCR 2 TCD1 SHD SPP1 KWK

58.0 57.4 - 57.6 58.2 59.2 60.0 60.8

2
↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg

09/01 62 98 80.0 60 89 74.5 53 90 71.5 56 95 75.5 58 96 77.0 60 100 80.0 61 100 80.5 64 99 81.5 68 100 84.0 62 90 76.0 61 90 75.5 58 89 73.5

09/02 60 90 75.0 56 92 74.0 57 97 77.0 57 99 78.0 61 102 81.5 64 103 83.5 67 98 82.5 63 97 80.0 64 99 81.5 63 93 78.0 60 90 75.0 59 90 74.5

09/03 55 89 72.0 55 95 75.0 57 99 78.0 58 103 80.5 60 105 82.5 69 99 84.0 64 98 81.0 61 97 79.0 64 95 79.5 61 85 73.0 60 87 73.5 57 90 73.5

09/04 54 94 74.0 54 99 76.5 57 103 80.0 60 105 82.5 62 98 80.0 61 96 78.5 59 93 76.0 58 92 75.0 64 92 78.0 61 94 77.5 61 92 76.5 60 93 76.5

09/05 53 99 76.0 56 101 78.5 59 103 81.0 62 102 82.0 63 98 80.5 62 92 77.0 61 86 73.5 57 88 72.5 68 100 84.0 63 99 81.0 60 93 76.5 59 91 75.0

09/06 55 101 78.0 58 102 80.0 61 104 82.5 66 104 85.0 66 103 84.5 64 97 80.5 61 94 77.5 58 90 74.0 62 94 78.0 63 93 78.0 62 88 75.0 59 92 75.5

09/07 57 104 80.5 63 106 84.5 67 105 86.0 67 103 85.0 63 100 81.5 60 96 78.0 58 94 76.0 60 94 77.0 59 95 77.0 58 99 78.5 60 93 76.5 57 91 74.0

09/08 63 107 85.0 70 104 87.0 66 100 83.0 61 89 75.0 58 93 75.5 57 93 75.0 56 93 74.5 56 92 74.0 61 96 78.5 60 95 77.5 58 89 73.5 58 92 75.0

09/09 69 105 87.0 69 100 84.5 68 92 80.0 57 94 75.5 57 94 75.5 58 95 76.5 58 97 77.5 58 95 76.5 63 94 78.5 59 87 73.0 56 85 70.5 55 86 70.5

09/10 68 99 83.5 69 89 79.0 59 92 75.5 57 95 76.0 58 96 77.0 60 98 79.0 59 93 76.0 58 91 74.5 60 87 73.5 60 83 71.5 58 87 72.5 57 90 73.5

09/11 69 90 79.5 67 91 79.0 57 93 75.0 59 96 77.5 62 100 81.0 60 94 77.0 58 92 75.0 54 87 70.5 60 80 70.0 58 84 71.0 58 86 72.0 54 89 71.5

09/12 65 96 80.5 61 95 78.0 59 95 77.0 62 99 80.5 60 95 77.5 59 93 76.0 55 86 70.5 53 83 68.0 61 75 68.0 56 80 68.0 55 85 70.0 56 88 72.0

09/13 60 96 78.0 62 99 80.5 63 102 82.5 60 94 77.0 57 89 73.0 56 85 70.5 55 79 67.0 52 80 66.0 60 90 75.0 62 96 79.0 62 93 77.5 59 91 75.0

09/14 62 100 81.0 60 103 81.5 60 94 77.0 57 88 72.5 56 89 72.5 57 80 68.5 54 79 66.5 52 82 67.0 60 91 75.5 57 91 74.0 56 85 70.5 57 87 72.0

09/15 60 106 83.0 63 97 80.0 56 91 73.5 55 91 73.0 55 83 69.0 55 73 64.0 47 80 63.5 53 87 70.0 57 89 73.0 58 88 73.0 55 87 71.0 57 87 72.0

09/16 63 96 79.5 60 92 76.0 55 92 73.5 54 80 67.0 54 74 64.0 50 81 65.5 54 87 70.5 53 88 70.5 59 90 74.5 57 96 76.5 61 93 77.0 59 90 74.5

09/17 59 93 76.0 57 90 73.5 53 77 65.0 52 75 63.5 51 87 69.0 55 91 73.0 56 90 73.0 55 90 72.5 63 96 79.5 59 96 77.5 56 84 70.0 56 87 71.5

09/18 55 91 73.0 61 72 66.5 51 76 63.5 53 89 71.0 55 91 73.0 58 90 74.0 53 92 72.5 57 95 76.0 58 95 76.5 57 94 75.5 58 90 74.0 56 90 73.0

09/19 60 72 66.0 58 78 68.0 55 91 73.0 57 92 74.5 56 90 73.0 57 93 75.0 59 95 77.0 57 92 74.5 60 93 76.5 58 95 76.5 58 90 74.0 56 90 73.0

09/20 58 80 69.0 66 90 78.0 58 92 75.0 56 90 73.0 55 96 75.5 59 97 78.0 58 93 75.5 59 89 74.0 61 90 75.5 59 91 75.0 58 87 72.5 56 88 72.0

09/21 66 93 79.5 59 96 77.5 59 91 75.0 59 94 76.5 61 97 79.0 58 93 75.5 57 91 74.0 55 87 71.0 59 88 73.5 59 84 71.5 57 85 71.0 56 88 72.0

09/22 56 95 75.5 60 93 76.5 60 94 77.0 59 96 77.5 58 93 75.5 56 88 72.0 53 84 68.5 53 79 66.0 58 77 67.5 57 82 69.5 56 81 68.5 55 85 70.0

09/23 59 94 76.5 74 97 85.5 59 98 78.5 57 91 74.0 55 88 71.5 53 84 68.5 51 73 62.0 46 74 60.0 55 86 70.5 52 89 70.5 56 85 70.5 52 85 68.5

09/24 74 98 86.0 62 98 80.0 57 90 73.5 54 84 69.0 51 80 65.5 50 75 62.5 49 80 64.5 49 84 66.5 58 89 73.5 57 91 74.0 57 89 73.0 56 88 72.0

09/25 60 99 79.5 59 90 74.5 53 85 69.0 51 79 65.0 47 74 60.5 47 81 64.0 49 84 66.5 52 84 68.0 57 89 73.0 57 93 75.0 59 89 74.0 55 87 71.0

09/26 58 91 74.5 NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR

09/27 56 85 70.5 54 77 65.5 43 74 58.5 47 83 65.0 52 89 70.5 51 89 70.0 53 88 70.5 54 89 71.5 60 94 77.0 59 91 75.0 57 85 71.0 53 82 67.5

09/28 53 75 64.0 50 75 62.5 49 82 65.5 52 88 70.0 52 88 70.0 54 91 72.5 53 90 71.5 54 89 71.5 60 91 75.5 58 81 69.5 54 76 65.0 50 78 64.0

09/29 50 77 63.5 61 85 73.0 52 90 71.0 53 89 71.0 53 92 72.5 53 92 72.5 54 91 72.5 54 85 69.5 57 86 71.5 56 83 69.5 55 81 68.0 54 82 68.0

09/30 60 87 73.5 53 93 73.0 55 89 72.0 54 94 74.0 55 91 73.0 53 89 71.0 53 84 68.5 52 77 64.5 56 79 67.5 55 77 66.0 53 74 63.5 53 81 67.0

-

Web Links Legend

10-Day Min/Max Forecast NR = Forecasted temperatures not recorded

Previous Days Min/Max Actuals 100 = Previous day actual temperatures in red and bolded indicate a record temperature for that date

10 Days

Redding (RDD) Daily Air Temperatures (°F)

8 Days

D

A

T

E

Forecasted

4 Days 5 Days 6 Days

Actual

Previous Day Current Day 1 Day 2 Days 3 Days 7 Days 9 Days

3
Code Body of Water Location1 CDEC Link River Point Temp. (°F) Begin Date End Date

TCD N/A Shasta Power Plant N/A Sacramento CCR 56 09/21/2020 04/18/2021

SHD Sacramento River 0.3 miles downstream of Shasta Power Plant Click Here Sacramento CCR 60 04/18/2021 05/17/2021

SPP N/A Spring Creek Power Plant N/A Sacramento SAC 57 05/17/2021 06/15/2021

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here Sacramento SAC 55 06/15/2021 TBD

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here Trinity DGC 56 09/15/2021 10/01/2021

CCR Sacramento River 9.7 miles downstream of Keswick Dam Click Here Trinity NFH 56 10/01/2021 12/31/2021

BSF Sacramento River 25 miles downstream of Keswick Dam Click Here

JLF Sacramento River 34 miles downstream of Keswick Dam Click Here

BND Sacramento River 41 miles downstream of Keswick Dam Click Here

RDB Sacramento River 58 miles downstream of Keswick Dam Click Here

IGO Clear Creek 7.3 miles downstream of Whiskeytown Dam Click Here

LWS Trinity River 1.1 miles downstream of Lewiston Dam Click Here Notes

DGC Trinity River 19 miles downstream of Lewiston Dam Click Here

NFH Trinity River 38 miles downstream of Lewiston Dam Click Here 1 Distances are approximate

Station Details Water Right Temperature Control Points

58

62

66

70

74

78

82

86

90

54

55

56

57

58

59

60

61

62

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Air Temperature (°F)

Water Temperature (°F)

Mean Daily Temperatures

TCD KWK SAC CCR BSF RDD (Air)

4
Updated 09/23/2021 at 1353

Latest Profile Date: 09/23/2021

Page Description

6 - Shasta Lake Isothermobaths Plot

7 - Shasta Lake Cold Water Pool Volume ≤52°F

8 - Shasta Lake Cold Water Pool Volume ≤50°F

9 - Shasta Lake Cold Water Pool Volume ≤48°F

10 - Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

11 - Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

12 - Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

13 - Shasta Lake Cold Water Pool Comparison by Year

Shasta Lake Isothermobaths & Cold Water Pool Statistics

2021

5
6

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
7

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F

Avg (1998-2020) 2014 2015 2016 2019 2021
8

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F

Avg (1998-2020) 2014 2015 2016 2019 2021
9

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F

Avg (1998-2020) 2014 2015 2016 2019 2021
10

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
11

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
12

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
Sep-23

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

1998 216 71 -8 98 205 85 -20 103

1999 642 509 403 518 607 610 1019 745

2000 285 147 27 153 269 177 69 172

2001 235 190 166 197 222 228 419 290

2002 415 346 351 371 393 414 888 565

2003 413 181 21 205 390 217 54 220

2004 101 52 35 63 96 63 90 83

2005 158 83 36 92 149 100 92 114

2006 448 351 240 346 424 420 608 484

2007 190 160 137 162 180 192 347 239

2008 49 43 53 48 47 52 133 77

2009 164 132 115 137 155 158 292 202

2010 724 507 294 508 684 608 743 678

2011 883 698 544 708 834 836 1375 1015

2012 567 478 341 462 535 573 863 657

2013 302 280 248 277 285 336 626 416

2014 -3 -9 3 5 -3 -11 8 7

2015 218 186 52 152 206 223 130 186

2016 742 584 298 541 701 700 753 718

2017 839 604 434 626 793 724 1099 872

2018 465 383 191 346 440 458 484 461

2019 958 774 511 748 905 928 1292 1042

2020 302 191 68 187 285 229 171 228

2021 0 0 0 0 0 0 0 0

∆ TAF % ∆

Shasta Lake Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

13
Updated 09/10/2021 at 0745

Latest Profile Date: 09/09/2021

Page Description

15 - Trinity Lake Isothermobaths Plot

16 - Trinity Lake Cold Water Pool Volume ≤52°F

17 - Trinity Lake Cold Water Pool Volume ≤50°F

18 - Trinity Lake Cold Water Pool Volume ≤48°F

19 - Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

20 - Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

21 - Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

22 - Trinity Lake Cold Water Pool Comparison by Year

Trinity Lake Isothermobaths & Cold Water Pool Statistics

2021

14
15

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
16

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F

Avg (2000-2020) 2014 2015 2016 2019 2021
17

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F

Avg (2000-2020) 2014 2015 2016 2019 2021
18

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F

Avg (2000-2020) 2014 2015 2016 2019 2021
19

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
20

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
21

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Sep-09

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

2000 607 437 298 447 219 179 171 190

2001 483 412 327 407 174 169 187 177

2002 494 437 383 438 179 179 219 192

2003 793 585 389 589 286 240 223 250

2004 550 430 276 419 199 176 158 178

2005 731 579 298 536 264 237 171 224

2006 843 697 505 682 305 286 289 293

2007 549 484 430 488 198 198 247 214

2008 239 152 90 160 86 63 52 67

2009 164 120 52 112 59 49 30 46

2010 540 381 176 366 195 156 101 151

2011 1035 861 676 857 374 353 387 371

2012 814 764 697 759 294 313 400 336

2013 346 293 228 289 125 120 131 125

2014 -69 -57 -45 57 -25 -24 -26 25

2015 -77 -81 -57 72 -28 -33 -33 31

2016 129 50 50 76 47 20 29 32

2017 664 483 348 498 240 198 199 212

2018 636 581 505 574 230 239 290 253

2019 967 893 777 879 349 366 445 387

2020 422 398 338 386 153 163 194 170

2021 0 0 0 0 0 0 0 0

Trinity Cold Water Pool Comparison by Year (for Specified Date)

∆ TAF % ∆

Historic - Current (Historic - Current) / Current

22
Updated 09/14/2021 at 1404

Latest Profile Date: 09/14/2021

Page Description

24 - Whiskeytown Lake Isothermobaths Plot

25 - Whiskeytown Lake Cold Water Pool Volume ≤60°F

26 - Whiskeytown Lake Cold Water Pool Volume ≤58°F

27 - Whiskeytown Lake Cold Water Pool Volume ≤56°F

28 - Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances

29 - Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances

30 - Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances

31 - Whiskeytown Lake Cold Water Pool Comparison by Year

Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

2021

23
24

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
25

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F

Avg (2000-2020) 2014 2015 2016 2019 2021
26

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F

Avg (2000-2020) 2014 2015 2016 2019 2021
27

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F

Avg (2000-2020) 2014 2015 2016 2019 2021
28

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
29

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
30

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Sep-14

2021 ≤60° ≤58° ≤56° Abs. Avg. ≤60° ≤58° ≤56° Abs. Avg.

2000 4 43 90 46 2 44 266 104

2001 15 50 94 53 10 50 276 112

2002 14 48 75 45 10 48 219 92

2003 4 43 79 42 3 43 232 92

2004 11 37 45 31 8 37 133 59

2005 -50 -53 -26 43 -34 -54 -76 55

2006 25 57 100 61 17 58 294 123

2007 3 25 44 24 2 26 130 53

2008 2 33 68 34 1 33 201 79

2009 -22 -14 -28 22 -15 -14 -83 38

2010 -34 -47 -27 36 -23 -48 -80 50

2011 -27 -11 -14 17 -19 -11 -42 24

2012 -2 12 3 6 -1 12 9 8

2013 24 54 82 53 16 55 242 104

2014 -17 -5 -30 17 -12 -5 -87 35

2015 -33 -91 -34 53 -23 -92 -99 71

2016 -50 -56 -23 43 -35 -57 -69 53

2017 17 43 56 39 12 44 164 73

2018 -24 -11 -11 15 -16 -11 -33 20

2019 -38 -9 -17 22 -27 -9 -51 29

2020 0 0 0 0 0 0 0 0

∆ TAF % ∆

Whiskeytown Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

31