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Clear Creek Temperature Target Analysis

This page provides analysis, based on Reclamation 2019 Proposed Action, 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 Thresholds section.

View Analysis for: Note: Years prior to 2019 pre-date the Reclamation Proposed Action and are provided for historical perspective on conditions.
graph 2023 Clear Creek nr Igo (IGO) Water Temp (F)

2023 Temperature Target Analysis and Exceedance

Steelhead
Life Stage		 Life Stage
Dates		 Criterion Possible
Days		 Data
Days		 Missing
Data
Days		 Total Period Analyzed Criteria Exceedance
Average
Temperature		 Days in
Target		 Days First Day Last Day
Juv Steelhead/Spring-Run Adults 6/1-9/15 Below/Equal 60F 107 6 0 54.9F 6 0    
Spring-Run Eggs/Pre-emergent Fry 9/16-10/31 Below/Equal 56F 0 0 0          

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Color Vision Deficiency (CVD) colors

Clear Creek Temperature Target Analysis History

graph Clear Creek Temperature Target Analysis History

2023 Clear Creek Temperature Target Analysis Data Table for Clear Creek nr Igo (IGO)

Date Value Juvenile/Adults
60F
6/1-9/15		 Eggs/Fry
56F
9/16-10/31
Date Value Juvenile/Adults
60F
6/1-9/15		 Eggs/Fry
56F
9/16-10/31
2023-06-06 55.32 Target  
2023-06-05 54.23 Target  
2023-06-04 55.50 Target  
2023-06-03 55.09 Target  
2023-06-02 54.68 Target  
2023-06-01 54.70 Target  
2023-05-31 54.33    
2023-05-30 54.07    
2023-05-29 54.25    
2023-05-28 54.13    
2023-05-27 54.08    
2023-05-26 54.40    
2023-05-25 53.75    
2023-05-24 53.98    
2023-05-23 54.11    
2023-05-22 54.27    
2023-05-21 54.53    
2023-05-20 54.60    
2023-05-19 54.39    
2023-05-18 54.51    
2023-05-17 54.96    
2023-05-16 54.92    
2023-05-15 54.33    
2023-05-14 54.26    
2023-05-13 54.24    
2023-05-12 53.48    
2023-05-11 52.75    
2023-05-10 51.52    
2023-05-09 50.58    
2023-05-08 49.51    
2023-05-07 49.04    
2023-05-06 49.45    
2023-05-05 49.68    
2023-05-04 49.84    
2023-05-03 51.35    
2023-05-02 50.27    
2023-05-01 50.19    
2023-04-30 52.93    
2023-04-29 53.46    
2023-04-28 53.10    
2023-04-27 52.80    
2023-04-26 52.28    
2023-04-25 51.61    
2023-04-24 51.47    
2023-04-23 52.23    
2023-04-22 51.93    
2023-04-21 50.90    
2023-04-20 49.38    
2023-04-19 48.61    
2023-04-18 48.21    
2023-04-17 49.36    
2023-04-16 50.71    
2023-04-15 50.25    
2023-04-14 49.48    
2023-04-13 48.93    
2023-04-12 49.79    
2023-04-11 52.19    
2023-04-10 51.88    
2023-04-09 50.68    
2023-04-08 50.33    
2023-04-07 48.63    
2023-04-06 47.76    
2023-04-05 47.63    
2023-04-04 46.82    
2023-04-03 46.71    
2023-04-02 47.00    
2023-04-01 47.48    
2023-03-31 47.44    
2023-03-30 46.94    
2023-03-29 45.97    
2023-03-28 45.31    
2023-03-27 45.77    
2023-03-26 46.49    
2023-03-25 46.57    
2023-03-24 46.68    
2023-03-23 47.95    
2023-03-22 48.28    
2023-03-21 47.89    
2023-03-20 49.12    
2023-03-19 48.09    
2023-03-18 47.14    
2023-03-17 47.37    
2023-03-16 47.59    
2023-03-15 47.97    
2023-03-14 48.89    
2023-03-13 47.91    
2023-03-12 46.59    
2023-03-11 46.05    
2023-03-10 45.98    
2023-03-09 44.21    
2023-03-08 45.12    
2023-03-07 44.70    
2023-03-06 44.03    
2023-03-05 45.04    
2023-03-04 45.35    
2023-03-03 45.59    
2023-03-02 45.40    
2023-03-01 44.45    
2023-02-28 43.80    
2023-02-27 44.21    
2023-02-26 45.00    
2023-02-25 45.09    
2023-02-24 43.41    
2023-02-23 44.29    
2023-02-22 44.90    
2023-02-21 46.26    
2023-02-20 46.76    
2023-02-19 46.14    
2023-02-18 45.63    
2023-02-17 45.53    
2023-02-16 44.94    
2023-02-15 45.00    
2023-02-14 45.21    
2023-02-13 46.38    
2023-02-12 46.46    
2023-02-11 46.24    
2023-02-10 45.96    
2023-02-09 46.03    
2023-02-08 45.68    
2023-02-07 45.55    
2023-02-06 45.32    
2023-02-05 46.07    
2023-02-04 46.15    
2023-02-03 45.47    
2023-02-02 44.95    
2023-02-01 44.89    
2023-01-31 44.74    
2023-01-30 44.21    
2023-01-29 45.27    
2023-01-28 45.94    
2023-01-27 46.36    
2023-01-26 46.90    
2023-01-25 46.45    
2023-01-24 46.48    
2023-01-23 46.07    
2023-01-22 45.98    
2023-01-21 46.02    
2023-01-20 46.13    
2023-01-19 46.55    
2023-01-18 47.44    
2023-01-17 48.32    
2023-01-16 48.78    
2023-01-15 48.97    
2023-01-14 49.60    
2023-01-13 49.57    
2023-01-12 49.71    
2023-01-11 49.25    
2023-01-10 49.70    
2023-01-09 50.55    
2023-01-08 49.59    
2023-01-07 48.87    
2023-01-06 48.57    
2023-01-05 49.23    
2023-01-04 47.74    
2023-01-03 47.11    
2023-01-02 46.73    
2023-01-01 47.68    

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 Reclamation Proposed Action.

Thresholds

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 Reclamation 2019, p4-2.

Reclamation 2019. Reinitiation of Consultation on the Coordinated Long-Term Operation of the Central Valley Project and State Water Project Central Valley Project, California Mid-Pacific Region, Final Biological Assessment, Chapter 4: Proposed Action. October 21. Available online: https://www.usbr.gov/mp/bdo/lto/biop.html

Daily water temperature in below normal and wetter years of: (1) 60°F at the Igo gage from June 1 through September 15; and (2) 56°F or less at the Igo gage from September 15 to October 31; operate as close as possible to these targets in dry and critical years.
Citation
Columbia Basin Research, University of Washington. (2023). SacPAS Clear Creek Temperature Target Analysis. Available from www.cbr.washington.edu/sacramento/data/tc_clear.html
Generated: 07 Jun 2023 06:45:04 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/