Report Generated 09/18/2020 at 1009

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 - 2020
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Jul 10212 1501 12074 79.5 79.6

08/01 51.4 50.2 56.1 52.5 53.1 53.6 55.3 56.4 57.3 58.5 58.8 51.2 60.3 66.2 9154 1467 11066 83.0 77.9 78.0

08/02 51.6 50.3 56.2 52.5 53.1 53.7 55.3 56.5 57.3 58.4 59.0 51.1 60.2 65.9 8824 1574 11111 82.5 78.5 78.3

08/03 51.8 50.4 56.2 52.6 53.3 53.8 55.5 56.7 57.5 58.7 59.2 51.3 59.9 65.5 8969 1554 11111 85.0 81.4 81.1

08/04 51.8 ? 50.4 56.2 52.9 53.5 54.1 55.7 56.9 57.8 58.9 59.4 51.4 60.5 66.3 8745 1485 11098 84.0 79.3 79.0

08/05 51.8 50.6 56.3 52.7 53.4 54.1 55.8 57.1 58.1 59.3 59.4 51.3 60.9 67.0 9194 1304 11108 81.5 76.0 75.1

08/06 51.2 50.1 56.3 52.9 53.6 54.2 55.8 57.0 57.8 59.1 59.4 51.5 60.7 66.3 8821 1514 11106 78.5 75.1 73.4

08/07 50.9 49.9 56.5 52.7 53.5 54.3 56.1 57.4 58.2 59.3 59.4 51.6 60.6 66.4 8454 1687 10901 86.5 81.1 80.6

08/08 51.0 50.0 56.4 52.2 53.0 53.7 55.6 57.1 58.0 59.4 59.3 51.5 60.5 66.5 8584 1542 10561 85.5 81.7 81.2

08/09 51.1 50.1 56.5 52.4 53.0 53.7 55.4 56.9 57.7 59.0 59.6 51.2 60.5 66.8 8469 1539 10562 90.0 85.0 84.9

08/10 51.1 50.1 56.6 52.5 53.2 53.9 55.6 57.0 57.8 59.1 59.7 51.1 60.7 67.4 8969 1786 10551 91.0 84.8 84.6

08/11 51.0 50.2 56.7 52.5 53.3 53.9 55.8 57.3 58.0 59.3 59.8 51.1 60.3 66.8 7724 1838 10261 85.5 79.5 78.7

08/12 51.1 50.1 ? 56.7 52.7 53.4 54.0 55.8 57.2 58.0 59.2 59.4 50.9 59.2 65.0 8187 1354 10185 82.0 78.2 78.0

08/13 50.7 50.0 56.9 52.0 52.9 53.5 55.3 56.7 57.6 58.9 59.3 51.3 59.4 64.9 8988 965 10313 84.0 78.6 80.3

08/14 50.8 50.0 56.9 52.1 52.8 53.4 54.9 56.2 57.0 58.4 58.9 ? 51.3 59.7 65.6 8340 1638 10269 88.0 82.3 84.9

08/15 50.9 50.1 56.9 52.3 53.0 53.8 55.4 56.8 57.5 58.6 59.7 51.4 60.2 66.2 7326 1851 10107 91.5 84.5 86.7

08/16 50.6 50.0 57.0 52.7 53.2 53.8 55.1 56.4 57.2 58.5 59.0 51.1 59.7 65.8 7997 1688 10036 90.0 82.0 82.5

08/17 50.4 ? 49.5 57.1 52.2 52.7 53.1 54.4 55.6 56.3 57.1 58.0 50.8 57.9 64.0 7765 1540 9984 84.5 76.1 80.7

08/18 50.4 49.6 57.1 51.8 52.5 53.1 54.6 55.8 56.4 57.2 59.8 50.7 58.7 64.0 8205 1582 10022 92.0 85.4 87.6

08/19 50.6 49.8 57.0 51.9 52.6 53.1 54.4 55.5 56.2 57.3 58.8 50.1 58.7 64.1 7165 1363 9965 91.0 77.9 79.5

08/20 50.5 49.8 56.9 51.8 52.5 53.0 54.1 55.1 55.6 56.0 58.6 50.9 57.7 63.3 7947 1337 9460 78.0 71.9 73.0

08/21 50.7 49.7 56.8 51.9 52.5 53.0 54.1 54.9 55.3 55.6 58.4 51.2 59.5 64.6 8191 1287 9269 77.5 68.9 67.6

08/22 50.8 ? 49.9 56.8 52.1 52.6 53.0 54.2 55.2 55.7 56.0 58.2 51.2 59.0 65.3 7063 1286 8962 79.5 72.3 74.3

08/23 50.9 ? 49.9 56.8 52.3 52.8 53.2 54.6 55.6 56.1 56.5 58.4 50.9 57.6 63.5 6751 1643 9065 82.5 75.3 76.3

08/24 50.8 ? 49.8 56.9 52.4 52.9 53.3 54.9 56.2 56.9 57.5 57.8 50.3 56.4 61.6 6449 1771 8736 85.0 78.3 78.7

08/25 50.6 49.8 56.8 52.3 52.8 53.2 54.6 55.9 ? 56.6 ? 57.7 58.0 50.2 56.2 61.3 6462 1726 8518 80.5 75.7 77.0

08/26 50.8 49.8 56.8 52.3 52.9 53.3 54.7 55.9 56.5 57.5 58.0 50.1 56.6 61.8 6069 1559 8289 81.0 75.7 76.3

08/27 50.9 50.1 56.8 52.4 53.0 53.6 55.2 56.4 57.1 58.1 58.8 50.4 57.0 62.1 6211 1518 8013 83.0 77.9 77.5

08/28 50.7 49.9 56.7 52.6 53.4 54.1 55.8 57.2 58.0 59.1 59.0 50.3 57.7 63.0 6057 1538 7836 87.0 78.2 77.9

08/29 50.7 49.7 56.6 52.6 53.3 54.1 55.6 57.0 57.9 59.2 58.8 50.6 57.5 63.1 5712 1576 7904 81.5 75.6 75.4

08/30 50.7 49.6 56.5 52.7 53.5 54.3 55.8 57.0 57.5 58.5 58.8 50.6 57.7 62.9 6297 1253 7877 84.5 76.8 77.4

08/31 50.5 49.6 56.6 52.6 53.3 54.0 55.9 57.4 58.3 59.3 58.7 50.6 57.9 63.3 5432 1672 7552 83.0 78.5 80.3

Aug 7694 1530 9735 78.4 78.9

238521 47437 301798

Legend Notes 473097 94089 598604

? = 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 3 for more details)

↑ = Record high air temperature 3 IGO thermistor vandalized and out of commission as of 7/29/2020. Data is from nearby

↓ = Record low air temperature temperature logger. A bias has been applied to better represent the IGO location.

 = Monthly Averages

56.5

IGO3

57.2

Total AF

58.6 58.6

RDB

58.2 59.0

LWS

51.0 59.0

DGC

-

JLF BND

Mean Daily Air 

Temperatures (°F)

RDD

84.1

Total CFS

64.7 84.5

53.3 53.9 56.7 57.6

Mean Daily 

Release (CFS)

NFH

-

Mean Daily Water Temperatures (°F)

53.0

52.4 53.0

55.0 52.9

53.6

55.5

55.2

D

A

T

E

51.9 51.0

TCD SAC CCR 1 SHD SPP1 KWK BSF2

50.9 50.0 56.7

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

08/01 64 101 82.5 63 102 82.5 64 102 83.0 65 101 83.0 65 100 82.5 64 96 80.0 63 98 80.5 65 99 82.0 67 97 82.0 66 96 81.0 67 95 81.0 63 96 79.5

08/02 63 103 83.0 65 102 83.5 65 101 83.0 65 100 82.5 63 95 79.0 63 97 80.0 64 98 81.0 64 101 82.5 67 100 83.5 67 101 84.0 69 99 84.0 65 98 81.5

08/03 64 101 82.5 67 101 84.0 65 101 83.0 63 94 78.5 62 95 78.5 64 99 81.5 64 101 82.5 67 103 85.0 66 101 83.5 67 99 83.0 68 97 82.5 64 96 80.0

08/04 67 103 85.0 68 101 84.5 63 94 78.5 61 94 77.5 64 99 81.5 66 104 85.0 68 105 86.5 68 104 86.0 68 99 83.5 66 99 82.5 66 97 81.5 64 97 80.5

08/05 67 101 84.0 69 93 81.0 59 93 76.0 63 99 81.0 65 104 84.5 68 107 87.5 69 105 87.0 67 101 84.0 67 96 81.5 65 94 79.5 65 95 80.0 64 97 80.5

08/06 69 94 81.5 64 94 79.0 64 100 82.0 65 104 84.5 67 107 87.0 69 106 87.5 68 100 84.0 65 98 81.5 65 97 81.0 65 96 80.5 66 96 81.0 64 96 80.0

08/07 63 94 78.5 72 100 86.0 65 104 84.5 68 107 87.5 69 106 87.5 68 100 84.0 65 98 81.5 64 99 81.5 67 96 81.5 64 99 81.5 64 97 80.5 65 98 81.5

08/08 71 102 86.5 71 104 87.5 67 107 87.0 70 107 88.5 68 101 84.5 65 99 82.0 64 100 82.0 65 100 82.5 66 103 84.5 67 102 84.5 66 99 82.5 64 96 80.0

08/09 66 105 85.5 72 107 89.5 70 108 89.0 68 99 83.5 65 99 82.0 63 101 82.0 65 103 84.0 67 102 84.5 65 100 82.5 65 100 82.5 65 98 81.5 63 96 79.5

08/10 70 110 90.0 74 109 91.5 69 100 84.5 65 100 82.5 64 102 83.0 65 105 85.0 67 106 86.5 65 106 85.5 63 99 81.0 65 102 83.5 65 98 81.5 64 98 81.0

08/11 73 109 91.0 74 100 87.0 64 97 80.5 63 100 81.5 65 106 85.5 70 105 87.5 72 103 87.5 68 102 85.0 68 108 88.0 70 102 86.0 69 99 84.0 64 98 81.0

08/12 74 97 85.5 69 96 82.5 62 100 81.0 65 105 85.0 70 108 89.0 70 104 87.0 69 103 86.0 67 103 85.0 64 97 80.5 62 99 80.5 64 96 80.0 63 95 79.0

08/13 67 97 82.0 68 101 84.5 64 106 85.0 70 109 89.5 72 105 88.5 73 107 90.0 71 109 90.0 71 107 89.0 72 104 88.0 67 100 83.5 65 94 79.5 63 93 78.0

08/14 66 102 84.0 69 106 87.5 73 108 90.5 73 106 89.5 76 106 91.0 74 107 90.5 76 107 91.5 69 105 87.0 67 102 84.5 65 98 81.5 64 94 79.0 63 94 78.5

08/15 67 109 88.0 73 111 92.0 74 108 91.0 74 107 90.5 75 108 91.5 70 106 88.0 67 105 86.0 66 102 84.0 67 99 83.0 66 101 83.5 67 100 83.5 65 99 82.0

08/16 72 111 91.5 77 105 91.0 74 109 91.5 74 108 91.0 72 106 89.0 66 102 84.0 65 103 84.0 66 103 84.5 67 103 85.0 68 101 84.5 69 99 84.0 65 97 81.0

08/17 76 104 90.0 76 103 89.5 74 108 91.0 70 104 87.0 63 100 81.5 64 104 84.0 66 104 85.0 67 104 85.5 67 104 85.5 65 104 84.5 65 98 81.5 63 96 79.5

08/18 75 94 84.5 75 105 90.0 69 101 85.0 62 98 80.0 63 100 81.5 65 103 84.0 67 104 85.5 67 105 86.0 67 101 84.0 64 101 82.5 65 98 81.5 64 98 81.0

08/19 75 109 92.0 75 102 88.5 62 97 79.5 63 97 80.0 65 100 82.5 66 101 83.5 66 101 83.5 66 101 83.5 68 98 83.0 66 100 83.0 66 98 82.0 63 98 80.5

08/20 73 109 91.0 63 98 80.5 64 98 81.0 66 101 83.5 66 101 83.5 67 98 82.5 65 97 81.0 65 99 82.0 64 98 81.0 63 101 82.0 64 98 81.0 61 96 78.5

08/21 61 95 78.0 63 98 80.5 65 101 83.0 65 101 83.0 67 100 83.5 65 96 80.5 64 98 81.0 65 100 82.5 64 99 81.5 64 98 81.0 63 96 79.5 61 95 78.0

08/22 63 92 77.5 65 97 81.0 65 98 81.5 66 98 82.0 64 97 80.5 65 98 81.5 64 101 82.5 66 101 83.5 65 99 82.0 63 93 78.0 62 93 77.5 60 95 77.5

08/23 64 95 79.5 67 99 83.0 68 98 83.0 66 98 82.0 67 96 81.5 65 100 82.5 65 101 83.0 66 103 84.5 65 99 82.0 63 96 79.5 63 95 79.0 62 96 79.0

08/24 67 98 82.5 75 98 86.5 65 97 81.0 65 97 81.0 65 98 81.5 66 102 84.0 66 101 83.5 65 99 82.0 64 101 82.5 64 104 84.0 66 101 83.5 65 99 82.0

08/25 73 97 85.0 68 97 82.5 65 96 80.5 65 98 81.5 66 102 84.0 66 101 83.5 66 100 83.0 65 100 82.5 65 103 84.0 63 105 84.0 64 99 81.5 62 97 79.5

08/26 67 94 80.5 69 95 82.0 65 98 81.5 65 103 84.0 66 98 82.0 65 100 82.5 66 99 82.5 64 98 81.0 63 102 82.5 62 102 82.0 64 99 81.5 63 98 80.5

08/27 68 94 81.0 68 97 82.5 65 104 84.5 66 99 82.5 63 97 80.0 63 98 80.5 63 98 80.5 63 99 81.0 66 103 84.5 65 104 84.5 64 97 80.5 62 95 78.5

08/28 67 99 83.0 66 104 85.0 66 99 82.5 65 98 81.5 65 101 83.0 65 104 84.5 65 106 85.5 66 104 85.0 66 102 84.0 65 103 84.0 66 101 83.5 63 97 80.0

08/29 65 109 87.0 68 102 85.0 64 102 83.0 66 104 85.0 67 106 86.5 68 103 85.5 67 105 86.0 67 101 84.0 66 101 83.5 66 103 84.5 67 102 84.5 65 100 82.5

08/30 67 96 81.5 65 99 82.0 66 100 83.0 66 103 84.5 64 100 82.0 65 100 82.5 66 101 83.5 66 101 83.5 69 108 88.5 68 108 88.0 69 102 85.5 63 98 80.5

08/31 65 104 84.5 62 103 82.5 67 107 87.0 64 103 83.5 65 102 83.5 65 101 83.0 66 106 86.0 68 109 88.5 71 108 89.5 69 107 88.0 68 100 84.0 62 95 78.5

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 BSF 56 05/15/2019 09/20/2020

SHD Sacramento River 0.3 miles downstream of Shasta Power Plant Click Here Trinity DGC 56 09/15/2020 10/01/2020

SPP N/A Spring Creek Power Plant N/A Trinity NFH 56 10/01/2020 12/31/2020

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here

CCR Sacramento River 9.7 miles downstream of Keswick Dam Click Here

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

74

77

80

83

86

89

92

95

50

51

52

53

54

55

56

57

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 09/18/2020 at 1000

Latest Profile Date: 09/02/2020

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

2020

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 - 2020

<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 (1998-2019) 2014 2015 2016 2019 2020 2000
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 (1998-2019) 2014 2015 2016 2019 2020 2000
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 (1998-2019) 2014 2015 2016 2019 2020 2000
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 (1998-2019)

2020 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 (1998-2019)

2020 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 (1998-2019)

2020 95 90 75 50 25 10 5
Sep-02

2020 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

1998 9 -117 -109 78 2 -26 -48 25

1999 394 382 408 395 66 84 181 111

2000 -44 -81 -93 72 -7 -18 -41 22

2001 -97 -32 104 78 -16 -7 46 23

2002 186 183 241 203 31 40 107 60

2003 106 -94 -142 114 18 -21 -63 34

2004 -230 -169 -41 147 -39 -37 -18 31

2005 -165 -154 -65 128 -28 -34 -29 30

2006 215 166 198 193 36 37 88 53

2007 -103 -20 113 78 -17 -4 50 24

2008 -289 -185 3 159 -49 -41 1 30

2009 -155 -74 75 101 -26 -16 33 25

2010 560 417 310 429 94 92 137 108

2011 676 579 531 595 114 127 236 159

2012 328 329 306 321 55 72 136 88

2013 -3 60 170 78 -1 13 75 30

2014 -372 -257 -105 245 -63 -57 -47 55

2015 -129 -87 -95 104 -22 -19 -42 28

2016 566 500 225 430 95 110 100 102

2017 599 481 371 484 101 106 164 124

2018 238 183 110 177 40 40 49 43

2019 683 592 445 573 115 130 197 148

2020 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 09/18/2020 at 1004

Latest Profile Date: 08/13/2020

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

2020

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 - 2020

<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 (2000-2019) 2014 2015 2016 2019 2020
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 (2000-2019) 2014 2015 2016 2019 2020
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 (2000-2019) 2014 2015 2016 2019 2020
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 (2000-2019)

2020 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 (2000-2019)

2020 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 (2000-2019)

2020 95 90 75 50 25 10 5
Aug-13

2020 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

2000 171 47 -9 76 20 6 -1 9

2001 34 -18 -4 19 4 -2 -1 2

2002 44 14 52 37 5 2 8 5

2003 418 218 126 254 49 28 20 32

2004 74 -29 -92 65 9 -4 -15 9

2005 261 134 -53 149 30 17 -8 19

2006 404 295 190 296 47 37 30 38

2007 91 66 108 88 11 8 17 12

2008 -197 -259 -250 235 -23 -33 -40 32

2009 -285 -317 -301 301 -33 -40 -48 40

2010 63 -47 -161 90 7 -6 -26 13

2011 528 409 298 412 62 52 48 54

2012 355 341 355 351 42 43 57 47

2013 -107 -131 -113 117 -13 -17 -18 16

2014 -520 -499 -405 475 -61 -63 -65 63

2015 -545 -533 -440 506 -64 -67 -70 67

2016 -351 -410 -341 367 -41 -52 -54 49

2017 195 73 28 99 23 9 4 12

2018 142 117 151 137 17 15 24 19

2019 467 428 393 429 55 54 63 57

2020 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 09/18/2020 at 1006

Latest Profile Date: 08/18/2020

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

2020

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 - 2020

<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 (2000-2019) 2014 2015 2016 2019 2020
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 (2000-2019) 2014 2015 2016 2019 2020
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 (2000-2019) 2014 2015 2016 2019 2020
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 (2000-2019)

2020 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 (2000-2019)

2020 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 (2000-2019)

2020 95 90 75 50 25 10 5
Aug-18

2020 ≤60° ≤58° ≤56° Abs. Avg. ≤60° ≤58° ≤56° Abs. Avg.

2000 8 52 96 52 7 69 467 181

2001 37 72 100 70 30 97 488 205

2002 36 66 76 59 29 89 368 162

2003 26 49 36 37 21 65 176 87

2004 33 56 54 48 27 75 265 122

2005 -29 -30 -6 21 -23 -40 -28 30

2006 47 79 98 75 38 106 478 208

2007 35 59 70 54 28 78 341 149

2008 42 70 80 64 34 94 391 173

2009 2 1 -7 3 2 1 -32 12

2010 -29 -36 -6 24 -23 -49 -28 34

2011 11 31 27 23 9 42 134 61

2012 14 16 -5 12 12 21 -24 19

2013 50 84 109 81 41 113 530 228

2014 29 45 -9 28 24 61 -45 43

2015 -32 -63 -14 36 -26 -84 -66 59

2016 -13 -9 1 8 -11 -12 6 10

2017 34 60 70 55 27 80 343 150

2018 8 24 13 15 6 32 66 35

2019 2 19 14 11 1 26 67 31

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