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Clear Creek Temperature Target Analysis based on RPA I.1.5


This page provides analysis, based on NMFS 2009 RPA I.1.5, of current and historical temperature conditions for fish using only observed data. Actual pre-season and in-season management decision processes are complex employing multiple sources of observed data, models, and forecasts. For further information, see the Target Analysis Criteria section.

View Analysis for: Note: Years prior to 2009 pre-date the RPAs and are provided for historical perspective on conditions.
graph 2020 Clear Creek nr Igo (IGO) Water Temp (F)

2020 Temperature Target Analysis and Exceedance

Steelhead
Life Stage
Life Stage
Dates
RPA
Criterion
Possible
Days
Data
Days
Total Period Analyzed Criteria Exceedance
Average
Temperature
Days in
Target
Pct Days
Target
Days Pct of
Total Days
First Day Last Day
Juv Steelhead/Spring-Run Adults 6/1-9/14 Below/Equal 60F 106 62 56.3F 62 58.5% 0 0.0%    
Spring-Run Eggs/Pre-emergent Fry 9/15-10/31 Below/Equal 56F 0 0              

Jump to Detail Data

View Analysis for Another Year

Color Vision Deficiency (CVD) colors
Note: Years prior to 2009 pre-date the RPAs and are provided for historical perspective on conditions.

Clear Creek Temperature Target Analysis History based on RPA I.1.5

graph Clear Creek Temperature Target Analysis History

2020 Clear Creek Temperature Target Analysis Data Table for Clear Creek nr Igo (IGO)

Year Month Day Value Juvenile/Adult 60F Egg/Fry 56F
Year Month Day Value Juvenile/Adult 60F Egg/Fry 56F
2020 08 02 32.60 Target  
2020 08 01   Target  
2020 07 31 34.02 Target  
2020 07 30 35.20 Target  
2020 07 29 55.16 Target  
2020 07 28 59.33 Target  
2020 07 27 59.25 Target  
2020 07 26 59.05 Target  
2020 07 25 59.03 Target  
2020 07 24 58.78 Target  
2020 07 23 58.65 Target  
2020 07 22 58.70 Target  
2020 07 21 59.25 Target  
2020 07 20 59.27 Target  
2020 07 19 58.97 Target  
2020 07 18 58.91 Target  
2020 07 17 59.19 Target  
2020 07 16 59.08 Target  
2020 07 15 58.80 Target  
2020 07 14 58.60 Target  
2020 07 13 59.11 Target  
2020 07 12 58.46 Target  
2020 07 11 58.55 Target  
2020 07 10 58.51 Target  
2020 07 09 58.38 Target  
2020 07 08 58.39 Target  
2020 07 07 57.75 Target  
2020 07 06 57.96 Target  
2020 07 05 57.90 Target  
2020 07 04 57.78 Target  
2020 07 03 57.76 Target  
2020 07 02 57.77 Target  
2020 07 01 57.81 Target  
2020 06 30 57.57 Target  
2020 06 29 57.17 Target  
2020 06 28 57.85 Target  
2020 06 27 58.50 Target  
2020 06 26 58.18 Target  
2020 06 25 57.94 Target  
2020 06 24 57.41 Target  
2020 06 23 56.80 Target  
2020 06 22 55.44 Target  
2020 06 21 54.40 Target  
2020 06 20 54.16 Target  
2020 06 19 56.35 Target  
2020 06 18 57.01 Target  
2020 06 17 56.44 Target  
2020 06 16 56.10 Target  
2020 06 15 55.28 Target  
2020 06 14 56.75 Target  
2020 06 13 55.04 Target  
2020 06 12 55.49 Target  
2020 06 11 56.87 Target  
2020 06 10 56.99 Target  
2020 06 09 55.97 Target  
2020 06 08 55.25 Target  
2020 06 07 54.57 Target  
2020 06 06 55.55 Target  
2020 06 05 56.53 Target  
2020 06 04 57.40 Target  
2020 06 03 57.15 Target  
2020 06 02 56.93 Target  
2020 06 01 56.26 Target  
2020 05 31 55.01    
2020 05 30 53.97    
2020 05 29 55.55    
2020 05 28 56.10    
2020 05 27 56.05    
2020 05 26 55.52    
2020 05 25 55.41    
2020 05 24 54.48    
2020 05 23 54.02    
2020 05 22 53.90    
2020 05 21 54.28    
2020 05 20 53.61    
2020 05 19 53.16    
2020 05 18 52.48    
2020 05 17 53.83    
2020 05 16 52.82    
2020 05 15 53.33    
2020 05 14 52.25    
2020 05 13 52.20    
2020 05 12 52.73    
2020 05 11 51.48    
2020 05 10 51.92    
2020 05 09 51.83    
2020 05 08 53.93    
2020 05 07 53.90    
2020 05 06 53.75    
2020 05 05 53.14    
2020 05 04 52.87    
2020 05 03 52.35    
2020 05 02 52.13    
2020 05 01 53.02    
2020 04 30 53.59    
2020 04 29 53.44    
2020 04 28 53.86    
2020 04 27 53.49    
2020 04 26 53.52    
2020 04 25 53.28    
2020 04 24 53.05    
2020 04 23 53.05    
2020 04 22 52.53    
2020 04 21 52.40    
2020 04 20 51.77    
2020 04 19 52.07    
2020 04 18 51.78    
2020 04 17 52.14    
2020 04 16 52.32    
2020 04 15 51.91    
2020 04 14 51.46    
2020 04 13 51.53    
2020 04 12 52.65    
2020 04 11 52.64    
2020 04 10 52.36    
2020 04 09 50.83    
2020 04 08 52.04    
2020 04 07 50.92    
2020 04 06 50.30    
2020 04 05 49.23    
2020 04 04 49.03    
2020 04 03 50.53    
2020 04 02 50.30    
2020 04 01 50.34    
2020 03 31 50.31    
2020 03 30 49.57    
2020 03 29 49.71    
2020 03 28 49.14    
2020 03 27 48.99    
2020 03 26 49.10    
2020 03 25 48.52    
2020 03 24 49.18    
2020 03 23 49.30    
2020 03 22 49.65    
2020 03 21 49.33    
2020 03 20 49.04    
2020 03 19 48.72    
2020 03 18 48.18    
2020 03 17 47.77    
2020 03 16 48.40    
2020 03 15 47.69    
2020 03 14 48.83    
2020 03 13 49.40    
2020 03 12 49.52    
2020 03 11 49.38    
2020 03 10 49.24    
2020 03 09 48.85    
2020 03 08 48.75    
2020 03 07 48.72    
2020 03 06 48.88    
2020 03 05 49.16    
2020 03 04 49.41    
2020 03 03 49.16    
2020 03 02 48.37    
2020 03 01 48.13    
2020 02 29 48.11    
2020 02 28 48.12    
2020 02 27 48.37    
2020 02 26 48.49    
2020 02 25 48.25    
2020 02 24 47.72    
2020 02 23 47.73    
2020 02 22 48.03    
2020 02 21 47.67    
2020 02 20 47.31    
2020 02 19 47.16    
2020 02 18 47.31    
2020 02 17 47.65    
2020 02 16 48.21    
2020 02 15 47.42    
2020 02 14 47.16    
2020 02 13 46.88    
2020 02 12 47.35    
2020 02 11 47.18    
2020 02 10 46.82    
2020 02 09 46.69    
2020 02 08 47.10    
2020 02 07 47.45    
2020 02 06 47.43    
2020 02 05 46.70    
2020 02 04 46.05    
2020 02 03 46.15    
2020 02 02 47.18    
2020 02 01 47.56    
2020 01 31 48.11    
2020 01 30 48.22    
2020 01 29 47.53    
2020 01 28 48.07    
2020 01 27 48.02    
2020 01 26 48.24    
2020 01 25 47.59    
2020 01 24 47.59    
2020 01 23 46.86    
2020 01 22 47.14    
2020 01 21 46.52    
2020 01 20 46.75    
2020 01 19 46.69    
2020 01 18 46.30    
2020 01 17 46.48    
2020 01 16 46.25    
2020 01 15 46.15    
2020 01 14 46.61    
2020 01 13 46.83    
2020 01 12 46.67    
2020 01 11 47.13    
2020 01 10 46.72    
2020 01 09 47.08    
2020 01 08 47.31    
2020 01 07 46.63    
2020 01 06 46.77    
2020 01 05 47.18    
2020 01 04 47.66    
2020 01 03 47.40    
2020 01 02 47.46    
2020 01 01 48.44    

Data Methods, Notes, Citations

Data Methods

  1. Data Courtesy of CDEC and US Geological Survey
  2. Hourly data for Clear Creek nr Igo (IGO) is retrieved from CDEC on a daily basis.
  3. Columbia Basin Research (CBR) QA/QC process on IGO hourly data for outliers, false data (e.g., 32F measured by satellite), and data outside expected range of observation (e.g., 90F). Data loaded into CBR database.
  4. CBR calculates Daily Average values based on CBR cleaned hourly values.
  5. Query for daily average water temperature for selected year.
  6. Examine daily average data for 60F and 56F exceedance during date periods as outlined in RPA I.1.5.

Target Analysis Criteria

Please refer to the Clear Creek Technical Team (CCTT) annual reports for details on within water year activities.

Target analysis and exceedance found on this page is based on criteria as described in NMFS 2009, p589.

NMFS 2009. Biological and conference opinion on the long-term operations of the Central Valley Project and State Water Project. Long Beach, California. June 4. 844 pg. Plus appendices. Available online: www.westcoast.fisheries.noaa.gov/publications/Central_Valley/Water%20Operations/Operations,%20Criteria%20and%20Plan/nmfs_biological_and_conference_opinion_on_the_long-term_operations_of_the_cvp_and_swp.pdf

Direct quote from NMFS 2009, p589.

Action I.1.5. Thermal Stress Reduction

Objective: To reduce thermal stress to over-summering steelhead and spring-run during holding, spawning, and embryo incubation.

Action: Reclamation shall manage Whiskeytown releases to meet a daily water temperature of:
1)60°F at the Igo gage from June 1 through September 15; and
2)56°F at the Igo gage from September 15 to October 31.

Reclamation, in coordination with NMFS, will assess improvements to modeling water temperatures in Clear Creek and identify a schedule for making improvements.

Rationale: The water temperature criteria address the critical need for colder water that historically was available to salmonids above Whiskeytown Dam. If the criteria are not met, juvenile steelhead rearing habitat is limited, predation is higher, and disease is more prevalent. Spring-run adults need colder water to hold over during the summer until September. If water temperature is too warm, spring-run experience pre-spawn mortality and reduced production. The lower water temperature in September is necessary to reduce mortality of spring-run eggs and pre-emergent fry.


Citation
Columbia Basin Research, University of Washington. (2020). SacPAS Clear Creek Temperature Target Analysis (RPA I.1.5). Available from http://www.cbr.washington.edu/sacramento/data/tc_clear_RPAI.1.5.html
Generated: 03 Aug 2020 06:45:14 PDT. www.cbr.washington.edu/sacramento/data/.

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SacPAS: Central Valley Prediction & Assessment of Salmon, University of Washington, Columbia Basin Research, www.cbr.washington.edu/sacramento/