Report Generated 09/02/2021 at 0723

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

August - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Jul 6923 1910 9166 81.6 81.5

08/01 53.1 52.1 # - 54.9 55.7 56.5 ! - 59.5 60.6 62.2 58.6 51.1 # - 64.7 6400 1966 9052 88.0 - 83.0

08/02 53.5 52.2 # - 54.8 55.4 56.1 ! - 59.2 60.2 61.8 58.1 51.1 # - 61.6 6832 1960 9054 84.0 - 77.2

08/03 54.1 ? 52.8 # - 54.9 55.5 56.1 ? 57.5 58.7 59.7 61.0 57.7 50.8 # - 60.5 6848 1950 9043 82.0 78.3 78.4

08/04 54.1 52.7 # - 55.2 55.7 56.4 57.8 59.0 59.8 61.2 57.9 50.6 # - 59.7 5921 2070 9040 83.0 77.4 79.0

08/05 54.0 52.8 # - 55.4 55.7 56.3 57.7 58.9 59.8 61.1 56.8 50.0 # - 59.7 5819 1940 8793 75.5 72.3 72.3

08/06 53.0 52.4 # - 55.1 55.7 56.4 57.5 58.5 59.3 60.3 57.4 50.6 # - 58.8 6625 1959 8785 84.5 76.4 79.2

08/07 53.3 ? 52.3 # - 54.7 55.2 55.9 57.2 58.5 59.4 60.6 56.8 50.0 # - 58.2 6572 1807 8747 81.0 75.4 75.3

08/08 54.0 53.3 # - 54.2 54.7 55.3 56.5 57.8 58.8 60.2 57.0 49.9 # - 58.3 6666 1954 8744 82.0 76.3 77.0

08/09 53.9 53.3 # - 54.9 55.4 56.1 57.3 58.3 59.0 60.2 57.8 50.2 # - 61.1 6584 1879 8752 84.5 78.8 79.2

08/10 53.6 53.0 # - 55.2 55.6 56.3 57.6 58.9 59.8 61.1 57.4 50.2 # - 62.9 5970 1956 8542 86.0 80.7 81.5

08/11 54.2 53.4 # - 55.1 55.6 56.3 57.5 58.6 59.5 60.7 57.5 50.4 # - 62.6 6103 1878 8555 87.0 79.8 83.3

08/12 54.5 53.6 # - 55.0 55.5 56.1 57.3 58.5 59.4 60.5 57.1 50.3 # - 60.7 5693 1959 8546 88.5 81.1 80.6

08/13 53.2 ? 52.6 # - 55.2 55.5 56.1 57.2 58.4 59.4 60.7 56.5 50.0 # - 58.2 6127 2055 8553 83.5 78.3 80.2

08/14 52.7 51.8 # - 54.7 55.4 56.2 57.6 58.7 59.5 60.6 57.2 49.9 # - 57.9 6068 2020 8550 89.0 83.8 85.0

08/15 52.9 ? 52.1 # - 54.1 54.7 55.4 56.7 58.2 59.3 61.0 57.1 49.7 # - 58.6 6160 1943 8550 ↑ 94.5 85.9 85.8

08/16 53.3 52.5 # - 53.9 54.4 54.9 56.2 57.6 58.7 60.1 56.5 49.8 # - 59.1 6696 2058 8550 88.0 82.3 81.7

08/17 53.5 ? 52.7 # - 54.0 54.4 55.0 55.9 57.0 57.8 58.9 56.7 49.7 # - 59.0 6126 1936 8523 84.0 79.5 76.4

08/18 53.8 ? 53.1 # - 54.4 54.9 55.5 56.5 57.4 58.1 58.6 56.7 50.0 # - 58.5 5755 1913 8270 81.5 79.0 80.1

08/19 53.7 53.0 # - 54.6 55.2 55.9 57.0 58.1 59.0 60.0 57.0 50.4 # - 58.3 5782 1874 8002 84.5 79.5 83.2

08/20 53.9 53.3 # - 54.5 55.1 55.9 57.1 58.1 59.0 60.0 57.0 50.5 # - 58.0 5690 1934 7962 79.5 72.8 72.3

08/21 54.2 53.5 # - 54.8 55.2 55.9 57.1 58.1 59.0 60.0 56.8 50.3 # - 58.1 5377 1913 7767 74.5 69.3 69.1

08/22 54.3 53.7 # - 54.8 55.4 56.1 57.2 58.2 59.1 60.1 56.7 50.1 # - 56.9 5474 1963 7530 74.5 70.1 70.2

08/23 54.5 54.0 # - 55.0 55.6 56.3 57.5 58.5 59.3 60.3 56.9 50.4 # - 58.0 5164 1912 7524 75.5 70.3 71.2

08/24 54.6 54.3 # - 55.2 55.8 56.5 57.7 58.8 59.7 60.7 56.7 50.6 # - 60.3 5037 1784 7281 74.5 69.8 71.3

08/25 54.8 54.3 # - 55.4 56.1 56.8 58.0 59.0 59.9 60.9 56.6 50.9 # - 60.6 5002 1534 7032 74.0 70.4 72.1

08/26 55.0 54.5 # - 55.5 56.1 56.9 58.3 59.4 60.4 61.4 56.5 50.7 # - ? 59.3 5398 1117 6835 79.0 73.7 76.1

08/27 55.3 ? 55.1 # - 55.7 56.5 57.3 58.6 59.6 60.5 61.5 57.4 51.0 # - 58.7 5503 1040 6826 87.0 79.1 81.8

08/28 55.5 55.1 # - 55.8 56.4 57.1 58.5 59.6 60.5 61.6 56.9 50.8 # - 59.5 5208 1119 6834 88.5 76.3 79.1

08/29 55.5 54.1 # - 55.7 56.4 57.1 58.3 59.3 60.2 61.2 56.6 50.9 # - 60.0 5120 1050 6832 82.0 75.7 78.0

08/30 55.5 55.1 # - 55.7 56.4 57.2 58.5 59.6 60.5 61.5 56.6 51.0 # - 59.3 5207 1052 6829 82.0 76.2 78.4

08/31 55.7 55.5 # - 55.8 56.3 57.0 58.3 59.5 60.5 61.7 56.7 50.8 # - 58.1 5617 1074 6827 80.0 75.0 76.3

Aug 5889 1760 8088 76.7 77.9

182544 54569 250730

Legend Notes 362069 108235 497313

? = 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

61.1 57.6

RDB

60.7 57.1

LWS

50.4 -

DGC3

62.6

Mean Daily Air 

Temperatures (°F)

RDD

86.4

Total CFS

59.5 82.6

Mean Daily 

Release (CFS)

NFH

67.3

Mean Daily Water Temperatures (°F)

51.4

JLF BND IGO

55.0

BSF

55.9 53.8 54.7 55.3 57.1 58.4 59.6

D

A

T

E

52.3 50.9

SAC CCR 2 TCD1 SHD SPP1 KWK

54.1 53.4 - 55.5 56.2 57.4 58.6 59.5

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

08/01 80 104 92.0 71 102 86.5 64 100 82.0 63 102 82.5 62 99 80.5 59 97 78.0 62 98 80.0 64 96 80.0 68 99 83.5 67 99 83.0 69 99 84.0 67 100 83.5

08/02 70 106 88.0 70 101 85.5 63 103 83.0 64 99 81.5 60 97 78.5 64 100 82.0 64 99 81.5 65 98 81.5 67 101 84.0 67 101 84.0 69 99 84.0 68 101 84.5

08/03 68 100 84.0 62 103 82.5 63 103 83.0 61 94 77.5 62 100 81.0 65 101 83.0 67 98 82.5 64 94 79.0 66 101 83.5 66 102 84.0 67 100 83.5 67 102 84.5

08/04 60 104 82.0 62 103 82.5 59 92 75.5 62 101 81.5 64 103 83.5 67 97 82.0 65 95 80.0 65 96 80.5 65 98 81.5 67 102 84.5 69 98 83.5 64 93 78.5

08/05 61 105 83.0 64 92 78.0 62 100 81.0 64 103 83.5 65 98 81.5 64 97 80.5 63 101 82.0 65 103 84.0 68 102 85.0 66 100 83.0 67 96 81.5 66 97 81.5

08/06 62 89 75.5 66 100 83.0 63 103 83.0 64 99 81.5 64 99 81.5 65 103 84.0 67 105 86.0 68 105 86.5 69 105 87.0 68 102 85.0 67 99 83.0 66 97 81.5

08/07 65 104 84.5 66 105 85.5 67 102 84.5 64 106 85.0 65 107 86.0 72 109 90.5 78 111 94.5 77 106 91.5 72 107 89.5 70 107 88.5 69 100 84.5 65 98 81.5

08/08 65 97 81.0 66 98 82.0 64 102 83.0 65 106 85.5 68 107 87.5 69 105 87.0 70 105 87.5 70 106 88.0 68 102 85.0 65 98 81.5 65 92 78.5 63 96 79.5

08/09 66 98 82.0 67 103 85.0 65 104 84.5 68 106 87.0 69 105 87.0 70 104 87.0 69 105 87.0 67 101 84.0 66 99 82.5 65 95 80.0 65 91 78.0 64 95 79.5

08/10 66 103 84.5 69 106 87.5 68 107 87.5 69 105 87.0 70 104 87.0 70 106 88.0 70 105 87.5 65 102 83.5 68 96 82.0 63 96 79.5 63 95 79.0 65 99 82.0

08/11 68 104 86.0 70 108 89.0 71 107 89.0 71 107 89.0 70 104 87.0 69 104 86.5 65 101 83.0 64 101 82.5 64 96 80.0 62 96 79.0 63 93 78.0 63 93 78.0

08/12 70 104 87.0 71 107 89.0 71 106 88.5 72 106 89.0 72 105 88.5 70 102 86.0 64 100 82.0 63 99 81.0 66 103 84.5 67 103 85.0 67 97 82.0 64 97 80.5

08/13 71 106 88.5 72 106 89.0 72 108 90.0 73 110 91.5 72 105 88.5 68 101 84.5 64 101 82.5 64 102 83.0 66 103 84.5 67 104 85.5 69 100 84.5 65 98 81.5

08/14 71 96 83.5 72 108 90.0 72 112 92.0 71 106 88.5 66 98 82.0 63 98 80.5 64 100 82.0 63 101 82.0 67 101 84.0 68 99 83.5 67 98 82.5 65 98 81.5

08/15 72 106 89.0 74 110 92.0 71 104 87.5 66 99 82.5 63 98 80.5 65 99 82.0 62 98 80.0 63 100 81.5 67 101 84.0 66 99 82.5 66 96 81.0 63 95 79.0

08/16 73 116 94.5 76 106 91.0 66 96 81.0 60 94 77.0 64 99 81.5 61 96 78.5 60 94 77.0 60 95 77.5 63 95 79.0 62 100 81.0 64 98 81.0 63 98 80.5

08/17 75 101 88.0 72 94 83.0 61 95 78.0 62 96 79.0 60 97 78.5 60 90 75.0 58 93 75.5 58 96 77.0 64 100 82.0 65 102 83.5 64 97 80.5 62 96 79.0

08/18 72 96 84.0 70 91 80.5 63 93 78.0 61 95 78.0 60 89 74.5 57 91 74.0 58 95 76.5 59 97 78.0 64 102 83.0 63 105 84.0 64 99 81.5 64 100 82.0

08/19 70 93 81.5 76 95 85.5 64 96 80.0 59 89 74.0 57 91 74.0 58 93 75.5 59 96 77.5 60 98 79.0 62 98 80.0 65 101 83.0 64 97 80.5 62 96 79.0

08/20 72 97 84.5 67 96 81.5 60 88 74.0 56 90 73.0 56 93 74.5 57 93 75.0 58 95 76.5 60 98 79.0 66 101 83.5 66 105 85.5 66 99 82.5 64 98 81.0

08/21 65 94 79.5 63 88 75.5 59 90 74.5 58 92 75.0 59 93 76.0 60 95 77.5 59 101 80.0 64 103 83.5 66 105 85.5 65 105 85.0 66 99 82.5 62 97 79.5

08/22 63 86 74.5 58 89 73.5 57 90 73.5 56 90 73.0 57 92 74.5 58 99 78.5 64 102 83.0 66 104 85.0 63 99 81.0 63 101 82.0 63 96 79.5 61 95 78.0

08/23 58 91 74.5 60 94 77.0 57 94 75.5 57 94 75.5 58 97 77.5 61 100 80.5 65 101 83.0 64 102 83.0 65 101 83.0 64 102 83.0 62 95 78.5 61 96 78.5

08/24 59 92 75.5 59 90 74.5 56 91 73.5 56 96 76.0 63 100 81.5 65 102 83.5 63 101 82.0 65 100 82.5 64 101 82.5 62 101 81.5 62 96 79.0 61 97 79.0

08/25 58 91 74.5 57 91 74.0 57 96 76.5 63 100 81.5 65 104 84.5 63 105 84.0 64 101 82.5 62 97 79.5 62 96 79.0 60 99 79.5 61 95 78.0 59 91 75.0

08/26 55 93 74.0 61 95 78.0 63 100 81.5 65 103 84.0 63 102 82.5 63 97 80.0 61 94 77.5 58 91 74.5 60 93 76.5 59 95 77.0 61 94 77.5 60 95 77.5

08/27 60 98 79.0 77 101 89.0 66 104 85.0 64 102 83.0 63 98 80.5 59 94 76.5 58 92 75.0 58 91 74.5 58 92 75.0 58 92 75.0 58 91 74.5 59 93 76.0

08/28 70 104 87.0 80 104 92.0 64 102 83.0 64 98 81.0 59 94 76.5 57 91 74.0 55 88 71.5 54 88 71.0 58 93 75.5 58 98 78.0 61 95 78.0 63 95 79.0

08/29 73 104 88.5 63 102 82.5 63 99 81.0 59 94 76.5 58 92 75.0 56 91 73.5 56 92 74.0 57 94 75.5 60 98 79.0 62 102 82.0 65 96 80.5 62 95 78.5

08/30 62 102 82.0 63 101 82.0 62 96 79.0 58 90 74.0 54 90 72.0 55 91 73.0 55 91 73.0 56 95 75.5 67 102 84.5 64 102 83.0 64 96 80.0 61 95 78.0

08/31 63 101 82.0 63 96 79.5 59 91 75.0 55 90 72.5 56 94 75.0 58 96 77.0 58 97 77.5 62 100 81.0 65 102 83.5 66 100 83.0 65 95 80.0 61 93 77.0

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

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 10 Days

Redding (RDD) Daily Air Temperatures (°F)

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

72

75

78

81

84

87

90

93

96

51

52

53

54

55

56

57

58

59

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 31

Air Temperature (°F)

Water Temperature (°F)

Mean Daily Temperatures

TCD KWK SAC CCR BSF RDD (Air)

4
Updated 08/30/2021 at 1126

Latest Profile Date: 08/25/2021

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
Aug-25

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

1998 427 167 4 199 142 65 2 70

1999 766 661 551 660 254 259 359 291

2000 324 175 17 172 107 68 11 62

2001 271 223 227 240 90 87 148 108

2002 581 472 371 475 193 185 242 206

2003 487 144 -57 229 161 56 -37 85

2004 128 104 76 103 43 41 49 44

2005 213 119 62 131 71 47 40 53

2006 636 444 307 463 211 174 200 195

2007 296 267 262 275 98 104 170 124

2008 68 88 150 102 23 34 98 52

2009 200 167 183 184 66 65 120 84

2010 1009 757 497 754 335 296 324 318

2011 1084 877 677 879 360 343 441 381

2012 747 653 441 614 248 255 287 263

2013 356 309 278 314 118 121 181 140

2014 -15 -2 10 9 -5 -1 7 4

2015 213 147 -19 126 71 57 -13 47

2016 987 804 308 700 327 314 201 281

2017 959 731 506 732 318 286 330 311

2018 651 465 219 445 216 182 143 180

2019 1107 909 611 876 367 356 398 374

2020 374 252 111 245 124 98 72 98

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 08/12/2021 at 1320

Latest Profile Date: 08/12/2021

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
Aug-12

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

2000 634 489 344 489 158 137 123 139

2001 492 422 348 421 122 118 125 122

2002 503 454 405 454 125 127 145 133

2003 875 659 477 670 218 185 171 191

2004 532 410 259 400 132 115 93 113

2005 719 573 299 530 179 160 107 149

2006 863 736 542 714 215 206 195 205

2007 549 506 460 505 137 142 165 148

2008 263 182 102 182 65 51 37 51

2009 174 123 51 116 43 34 18 32

2010 521 393 191 369 130 110 69 103

2011 985 848 649 827 245 238 233 239

2012 814 781 707 767 203 219 254 225

2013 353 311 241 302 88 87 87 87

2014 -61 -58 -52 57 -15 -16 -19 17

2015 -87 -95 -90 90 -22 -27 -32 27

2016 107 28 9 48 27 8 3 13

2017 655 513 381 516 163 144 137 148

2018 599 556 502 552 149 156 180 162

2019 926 866 744 845 231 242 267 247

2020 458 440 352 417 114 123 126 121

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 08/11/2021 at 1417

Latest Profile Date: 08/10/2021

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
Aug-10

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

2000 20 53 85 53 17 67 240 108

2001 41 67 83 64 35 85 235 118

2002 38 60 58 52 32 76 166 91

2003 30 47 34 37 26 59 95 60

2004 37 51 42 43 31 64 119 72

2005 -24 -33 -17 25 -21 -41 -48 37

2006 51 74 79 68 43 93 223 120

2007 41 57 59 52 35 72 167 91

2008 43 64 67 58 37 81 190 103

2009 4 -7 -19 10 3 -9 -54 22

2010 -27 -42 -17 29 -23 -53 -49 42

2011 20 35 26 27 17 44 75 45

2012 19 14 -13 15 16 18 -36 23

2013 55 82 98 78 47 103 277 142

2014 35 44 -18 33 30 55 -52 46

2015 -26 -64 -25 39 -22 -81 -71 58

2016 -3 -4 -10 6 -2 -5 -29 12

2017 37 58 64 53 32 73 181 95

2018 17 27 6 16 14 33 17 22

2019 12 22 13 16 10 27 38 25

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