Report Generated 07/19/2021 at 1123

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

June - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

May 4504 115 8281 69.9 71.3

06/01 54.2 52.6 51.9 55.1 56.3 57.1 59.7 61.4 62.6 64.1 56.8 51.4 56.8 60.5 6698 235 7022 87.0 82.3 83.2

06/02 53.9 52.1 51.7 55.0 56.1 56.8 59.7 61.5 62.8 64.6 56.8 51.5 57.4 61.5 5824 1157 7112 86.0 82.0 80.4

06/03 54.6 52.4 51.5 54.8 55.9 56.7 59.3 61.1 62.4 64.1 56.7 51.7 58.0 62.1 5348 772 7123 85.5 82.5 80.6

06/04 54.7 53.0 51.5 54.9 56.0 56.7 59.1 60.9 62.2 64.0 57.0 51.8 57.9 61.9 6210 902 7156 85.0 82.5 82.8

06/05 55.5 54.0 52.6 55.2 56.1 56.8 59.2 61.0 62.2 ? 64.0 56.5 51.8 57.5 61.1 7080 77 7174 83.0 81.2 80.3

06/06 55.3 53.1 52.5 55.7 56.5 57.1 59.2 60.7 61.7 63.1 56.0 51.9 56.9 60.0 6736 77 7226 82.0 77.5 79.5

06/07 54.7 53.0 51.7 55.9 56.5 57.0 59.0 60.3 61.3 62.5 55.0 52.1 56.2 58.9 6109 624 7181 72.0 69.1 70.4

06/08 54.9 52.8 52.2 55.2 55.9 ? 56.5 ? 58.6 59.6 60.5 61.5 54.6 51.8 56.0 58.3 5510 1071 7126 66.0 63.9 63.5

06/09 56.0 ? 53.8 52.1 55.0 55.7 ? 56.1 57.9 58.9 59.9 61.0 54.5 51.2 55.0 57.7 6168 763 7138 65.5 61.9 62.5

06/10 54.5 53.3 52.3 55.4 56.0 56.4 58.0 58.9 59.8 60.8 54.6 51.1 55.2 57.4 5529 750 7170 65.5 63.0 63.2

06/11 54.3 52.4 52.2 55.4 56.2 ? 56.8 58.6 59.4 60.2 61.0 55.3 50.5 55.2 58.2 5835 1028 7175 71.0 67.0 67.1

06/12 54.3 52.4 52.1 54.8 56.0 ? 56.6 58.9 59.9 60.9 61.8 56.5 50.9 56.3 58.9 5572 1483 7176 75.0 73.0 73.5

06/13 54.2 ? 53.3 52.0 54.5 55.7 ! - 59.1 60.5 61.9 63.5 57.0 50.3 57.4 61.4 5120 1765 7571 79.5 76.7 77.6

06/14 51.4 50.6 52.5 54.9 55.7 ? 56.5 59.0 60.4 61.6 63.3 56.7 50.2 57.2 62.2 5323 1840 7573 78.0 74.8 74.6

06/15 51.7 50.8 52.5 54.2 55.4 56.0 58.4 59.7 60.9 62.5 56.4 50.6 56.9 61.0 5957 1229 7573 78.0 72.3 73.5

06/16 51.6 ? 50.5 52.6 52.6 53.9 54.4 57.4 58.9 60.2 62.0 57.1 50.7 58.6 62.3 5957 1229 7573 87.5 77.7 80.0

06/17 51.3 50.6 52.6 52.8 53.9 54.5 57.0 58.4 59.5 61.2 58.0 51.1 59.4 64.3 7083 843 8076 ↑ 90.0 82.8 86.2

06/18 52.3 ? 51.0 53.1 52.5 53.7 54.3 57.0 ? 58.6 59.9 61.6 58.6 51.4 60.9 65.8 7079 728 8081 89.0 85.0 87.0

06/19 51.9 ? 50.4 53.1 52.8 53.8 54.4 57.0 ? 58.4 59.8 61.6 58.4 51.5 61.0 66.9 6321 1278 8080 91.0 85.0 85.9

06/20 51.4 ? 50.4 53.2 53.3 54.4 55.0 57.4 ? 58.7 60.1 61.7 57.9 51.6 61.2 66.7 6153 1599 8075 87.5 82.3 83.3

06/21 51.2 50.3 ? 53.4 52.8 54.0 54.6 57.4 ? 58.9 60.1 61.8 55.6 51.6 61.1 66.9 6350 1566 8074 83.5 79.4 78.9

06/22 ? 50.9 50.9 ? 53.7 52.5 53.7 54.3 56.9 ? 58.5 59.7 61.5 54.1 51.7 61.0 66.3 6098 915 8024 82.0 78.0 76.7

06/23 50.5 51.3 ? 54.2 52.6 53.7 54.3 56.7 ? 58.1 59.3 61.1 53.4 51.6 60.9 66.4 7895 1225 8052 80.0 77.1 76.0

06/24 52.0 51.1 53.9 53.2 54.1 54.7 56.8 ? 58.1 59.4 61.1 55.1 51.7 61.1 66.7 4895 1225 8052 81.5 77.0 76.1

06/25 52.2 50.9 54.2 53.5 54.5 55.2 57.6 ? 59.1 60.3 61.7 57.7 51.9 61.8 67.8 6525 1349 8047 86.5 82.1 79.9

06/26 52.5 50.9 54.4 53.4 54.5 55.1 57.8 ! - 60.8 62.6 58.1 52.0 62.0 68.0 6556 1427 8050 ↑ 92.0 87.2 87.3

06/27 53.6 51.6 54.4 53.5 54.5 55.2 57.8 ! - 60.8 62.7 58.3 52.1 62.5 68.8 7560 375 8533 92.5 87.3 84.8

06/28 53.3 51.8 54.6 54.1 54.9 55.5 57.9 ? 59.1 60.8 62.7 58.6 52.4 63.1 69.4 7560 375 8533 88.5 85.1 82.5

06/29 51.9 50.8 54.7 54.6 55.5 56.2 58.6 ! - 61.1 62.7 58.2 52.4 62.8 69.3 7043 1019 8518 89.5 84.5 83.1

06/30 52.0 50.3 54.7 53.9 55.1 55.9 58.6 ! - 61.4 63.2 58.4 52.6 62.6 68.8 6040 1766 8524 90.5 85.4 83.7

-

Jun 6271 1023 7693 78.2 78.1

188134 30692 230788

Legend Notes 373156 60876 457759

? = 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

↓ = Record low air temperature

 = Monthly Averages

59.6

IGO3

60.8

Total AF

62.3 53.3

RDB

62.4 56.6

LWS

51.5 59.0

DGC

53.4

JLF BND

Mean Daily Air 

Temperatures (°F)

RDD

72.8

Total CFS

63.5 82.4

57.6 58.1 60.6 61.3

Mean Daily 

Release (CFS)

NFH

55.4

Mean Daily Water Temperatures (°F)

50.5

54.1 55.1

51.6 57.1

55.7

59.6

58.2

D

A

T

E

52.6 55.8

SAC CCR 2 TCD1 SHD SPP1 KWK BSF

53.1 51.7 52.9

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

06/01 79 109 94.0 68 108 88.0 71 105 88.0 68 104 86.0 66 101 83.5 65 101 83.0 59 96 77.5 56 87 71.5 55 82 68.5 55 89 72.0 58 88 73.0 58 87 72.5

06/02 67 107 87.0 70 103 86.5 66 104 85.0 67 101 84.0 65 100 82.5 61 94 77.5 55 86 70.5 52 83 67.5 59 91 75.0 59 89 74.0 63 86 74.5 60 90 75.0

06/03 69 103 86.0 68 104 86.0 66 103 84.5 64 100 82.0 62 96 79.0 57 89 73.0 54 86 70.0 53 86 69.5 54 82 68.0 55 88 71.5 61 88 74.5 61 87 74.0

06/04 66 105 85.5 68 102 85.0 65 100 82.5 61 94 77.5 56 88 72.0 51 82 66.5 52 85 68.5 54 89 71.5 54 88 71.0 59 90 74.5 61 88 74.5 62 91 76.5

06/05 67 103 85.0 66 99 82.5 62 93 77.5 55 85 70.0 50 78 64.0 50 78 64.0 51 81 66.0 53 82 67.5 55 79 67.0 60 87 73.5 60 87 73.5 60 93 76.5

06/06 66 100 83.0 71 90 80.5 56 85 70.5 48 77 62.5 48 76 62.0 47 79 63.0 53 78 65.5 56 81 68.5 62 85 73.5 59 86 72.5 62 90 76.0 62 94 78.0

06/07 71 93 82.0 62 85 73.5 49 75 62.0 48 76 62.0 47 78 62.5 53 76 64.5 55 81 68.0 58 85 71.5 58 88 73.0 60 95 77.5 64 91 77.5 63 93 78.0

06/08 58 86 72.0 57 74 65.5 46 75 60.5 46 78 62.0 53 76 64.5 56 92 74.0 62 94 78.0 61 92 76.5 64 96 80.0 60 93 76.5 63 95 79.0 65 97 81.0

06/09 56 76 66.0 54 75 64.5 45 76 60.5 52 75 63.5 54 89 71.5 60 94 77.0 61 91 76.0 58 90 74.0 61 94 77.5 64 101 82.5 66 97 81.5 65 97 81.0

06/10 54 77 65.5 56 76 66.0 53 79 66.0 57 88 72.5 60 90 75.0 61 89 75.0 57 93 75.0 62 103 82.5 67 106 86.5 70 105 87.5 70 100 85.0 67 98 82.5

06/11 55 76 65.5 63 78 70.5 58 88 73.0 62 91 76.5 61 88 74.5 57 90 73.5 60 102 81.0 65 108 86.5 68 107 87.5 69 104 86.5 69 100 84.5 67 98 82.5

06/12 62 80 71.0 60 90 75.0 62 92 77.0 61 88 74.5 56 90 73.0 62 103 82.5 66 109 87.5 70 109 89.5 67 97 82.0 64 97 80.5 65 94 79.5 64 96 80.0

06/13 60 90 75.0 66 92 79.0 61 87 74.0 55 90 72.5 62 104 83.0 69 110 89.5 72 111 91.5 72 109 90.5 69 102 85.5 66 97 81.5 68 97 82.5 66 96 81.0

06/14 65 94 79.5 68 85 76.5 53 89 71.0 62 103 82.5 67 110 88.5 70 111 90.5 70 108 89.0 70 105 87.5 73 104 88.5 69 101 85.0 68 96 82.0 66 96 81.0

06/15 68 88 78.0 57 88 72.5 63 104 83.5 67 111 89.0 70 110 90.0 70 108 89.0 70 107 88.5 70 103 86.5 67 97 82.0 66 94 80.0 67 91 79.0 66 95 80.5

06/16 68 88 78.0 72 104 88.0 68 111 89.5 70 111 90.5 72 109 90.5 70 107 88.5 70 102 86.0 65 95 80.0 64 94 79.0 65 92 78.5 66 95 80.5 67 98 82.5

06/17 72 103 87.5 75 111 93.0 73 111 92.0 72 109 90.5 71 107 89.0 70 102 86.0 66 95 80.5 64 94 79.0 65 93 79.0 65 97 81.0 68 98 83.0 68 97 82.5

06/18 70 110 90.0 68 112 90.0 74 110 92.0 72 109 90.5 69 100 84.5 64 92 78.0 63 93 78.0 63 95 79.0 70 104 87.0 74 103 88.5 72 100 86.0 69 99 84.0

06/19 68 110 89.0 74 109 91.5 72 108 90.0 70 101 85.5 65 92 78.5 63 92 77.5 64 99 81.5 68 107 87.5 71 107 89.0 69 104 86.5 68 101 84.5 67 97 82.0

06/20 72 110 91.0 69 108 88.5 69 102 85.5 67 96 81.5 64 93 78.5 65 101 83.0 70 109 89.5 73 108 90.5 68 103 85.5 67 103 85.0 70 100 85.0 67 98 82.5

06/21 67 108 87.5 67 100 83.5 65 96 80.5 65 95 80.0 65 99 82.0 68 100 84.0 71 107 89.0 73 110 91.5 72 112 92.0 72 105 88.5 70 100 85.0 70 100 85.0

06/22 67 100 83.5 70 96 83.0 64 96 80.0 65 98 81.5 68 103 85.5 71 110 90.5 78 115 96.5 76 110 93.0 74 111 92.5 71 107 89.0 69 102 85.5 70 101 85.5

06/23 69 95 82.0 65 94 79.5 64 97 80.5 67 104 85.5 71 109 90.0 74 112 93.0 74 110 92.0 73 109 91.0 69 107 88.0 70 103 86.5 71 100 85.5 68 99 83.5

06/24 64 96 80.0 66 97 81.5 66 103 84.5 70 110 90.0 74 110 92.0 73 106 89.5 71 108 89.5 72 108 90.0 71 110 90.5 69 102 85.5 68 98 83.0 67 96 81.5

06/25 64 99 81.5 69 104 86.5 70 111 90.5 75 111 93.0 73 106 89.5 70 105 87.5 71 105 88.0 72 104 88.0 72 110 91.0 69 102 85.5 70 99 84.5 69 99 84.0

06/26 68 105 86.5 71 112 91.5 78 112 95.0 75 107 91.0 71 106 88.5 71 107 89.0 72 105 88.5 72 104 88.0 74 108 91.0 72 103 87.5 72 102 87.0 70 100 85.0

06/27 71 113 92.0 75 112 93.5 75 108 91.5 71 109 90.0 72 107 89.5 72 106 89.0 73 104 88.5 73 105 89.0 72 106 89.0 71 104 87.5 71 99 85.0 66 97 81.5

06/28 75 110 92.5 74 106 90.0 69 108 88.5 70 106 88.0 70 103 86.5 71 105 88.0 72 106 89.0 71 104 87.5 71 102 86.5 67 103 85.0 68 97 82.5 66 97 81.5

06/29 73 104 88.5 72 107 89.5 70 105 87.5 69 102 85.5 69 103 86.0 70 102 86.0 68 101 84.5 66 99 82.5 68 103 85.5 67 102 84.5 68 96 82.0 67 97 82.0

06/30 71 108 89.5 77 106 91.5 69 102 85.5 69 104 86.5 70 106 88.0 70 103 86.5 68 103 85.5 68 104 86.0 68 101 84.5 68 102 85.0 70 99 84.5 68 100 84.0

-

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

58

62

66

70

74

78

82

86

90

94

98

50

51

52

53

54

55

56

57

58

59

60

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 06/30/2021 at 1225

Latest Profile Date: 06/30/2021

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
Jun-30

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

1998 953 558 154 555 106 72 29 69

1999 1069 941 882 964 119 121 165 135

2000 650 396 35 361 72 51 7 43

2001 624 592 575 597 69 76 108 84

2002 921 813 581 772 102 105 109 105

2003 689 189 -120 333 76 24 -23 41

2004 486 360 305 384 54 46 57 53

2005 618 402 54 358 69 52 10 44

2006 1092 852 518 821 121 110 97 109

2007 637 602 529 589 71 78 99 83

2008 207 229 325 254 23 30 61 38

2009 369 306 373 350 41 40 70 50

2010 1249 894 517 887 139 115 97 117

2011 1381 1113 931 1142 153 144 175 157

2012 1360 1201 695 1086 151 155 130 145

2013 618 542 445 535 69 70 83 74

2014 -40 -60 -47 49 -4 -8 -9 7

2015 56 -13 -352 140 6 -2 -66 25

2016 1257 1056 262 858 139 136 49 108

2017 1222 879 550 883 136 113 103 117

2018 995 749 161 635 110 97 30 79

2019 1360 1090 696 1049 151 141 131 141

2020 654 438 72 388 73 57 13 48

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 06/17/2021 at 1245

Latest Profile Date: 06/17/2021

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
Jun-17

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

2000 658 568 495 574 99 93 96 96

2001 570 484 433 496 86 79 84 83

2002 490 462 420 457 74 75 81 77

2003 931 693 534 720 141 113 103 119

2004 605 531 396 511 91 87 77 85

2005 668 475 238 461 101 77 46 75

2006 1090 992 825 969 164 162 159 162

2007 511 468 471 483 77 76 91 81

2008 300 220 89 203 45 36 17 33

2009 98 18 -47 55 15 3 -9 9

2010 437 345 153 312 66 56 30 51

2011 923 833 706 821 139 136 136 137

2012 869 834 757 820 131 136 146 138

2013 449 408 325 394 68 66 63 66

2014 -45 -37 -9 31 -7 -6 -2 5

2015 -139 -153 -131 141 -21 -25 -25 24

2016 120 49 35 68 18 8 7 11

2017 719 586 513 606 108 95 99 101

2018 573 546 498 539 86 89 96 90

2019 957 910 803 890 144 148 155 149

2020 506 446 332 428 76 73 64 71

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 06/17/2021 at 0859

Latest Profile Date: 06/15/2021

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
Jun-15

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

2000 51 26 16 31 45 24 16 28

2001 20 21 11 17 18 19 11 16

2002 31 28 20 27 27 27 20 25

2003 52 47 34 44 45 44 35 41

2004 28 31 30 30 24 29 31 28

2005 -2 3 -5 3 -2 3 -5 3

2006 53 58 54 55 46 54 55 52

2007 24 29 19 24 21 27 19 23

2008 28 30 17 25 24 28 17 23

2009 18 4 -11 11 16 4 -12 10

2010 74 71 4 50 65 67 4 45

2011 105 52 5 54 92 49 5 49

2012 18 19 13 17 16 18 13 16

2013 32 31 31 31 28 29 32 30

2014 15 8 -15 12 13 7 -15 12

2015 23 6 -15 15 20 5 -16 14

2016 9 5 -8 7 7 4 -8 7

2017 46 47 43 46 40 45 44 43

2018 25 25 13 21 22 23 13 19

2019 30 28 12 23 26 26 12 21

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