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Lower American 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 American R blw Watt Ave Bridge (AWB) 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
Juvenile Rearing 5/15-10/31 Below/Equal 65F 170 23 0 56.0F 23 0    
Juvenile Rearing (limited coldwater) 5/15-10/31 Below/Equal 68F 170 23 0 56.0F 23 0    
Spawning 11/1-12/31 Below/Equal 56F 0 0 0          

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Color Vision Deficiency (CVD) colors

Lower American Temperature Target Analysis History

graph Lower American Temperature Target Analysis History

2023 Lower American Temperature Target Analysis Data Table for American R blw Watt Ave Bridge (AWB)

Date Value Rearing
65F
5/15-10/31		 Rearing (limited coldwater)
68F
5/15-10/31		 Spawning
56F
11/1-12/31
Date Value Rearing
65F
5/15-10/31		 Rearing (limited coldwater)
68F
5/15-10/31		 Spawning
56F
11/1-12/31
2023-06-06 55.67 Target Target  
2023-06-05 56.39 Target Target  
2023-06-04 56.40 Target Target  
2023-06-03 56.56 Target Target  
2023-06-02 56.60 Target Target  
2023-06-01 57.08 Target Target  
2023-05-31 56.65 Target Target  
2023-05-30 56.31 Target Target  
2023-05-29 56.52 Target Target  
2023-05-28 56.75 Target Target  
2023-05-27 56.30 Target Target  
2023-05-26 55.81 Target Target  
2023-05-25 56.80 Target Target  
2023-05-24 55.80 Target Target  
2023-05-23 55.64 Target Target  
2023-05-22 55.96 Target Target  
2023-05-21 55.37 Target Target  
2023-05-20 55.32 Target Target  
2023-05-19 56.52 Target Target  
2023-05-18 55.75 Target Target  
2023-05-17 55.36 Target Target  
2023-05-16 54.12 Target Target  
2023-05-15 54.91 Target Target  
2023-05-14 54.95      
2023-05-13 53.41      
2023-05-12 54.29      
2023-05-11 53.99      
2023-05-10 53.18      
2023-05-09 52.37      
2023-05-08 53.12      
2023-05-07 52.54      
2023-05-06 51.67      
2023-05-05 51.47      
2023-05-04 51.23      
2023-05-03 51.32      
2023-05-02 51.74      
2023-05-01 51.79      
2023-04-30 52.56      
2023-04-29 52.75      
2023-04-28 52.81      
2023-04-27 52.68      
2023-04-26 52.93      
2023-04-25 51.62      
2023-04-24 52.72      
2023-04-23        
2023-04-22        
2023-04-21 50.38      
2023-04-20 52.23      
2023-04-19 51.24      
2023-04-18 50.98      
2023-04-17 51.17      
2023-04-16 52.03      
2023-04-15 52.52      
2023-04-14 51.79      
2023-04-13 50.19      
2023-04-12 50.11      
2023-04-11 50.72      
2023-04-10 51.71      
2023-04-09 55.16      
2023-04-08 54.70      
2023-04-07 53.16      
2023-04-06 51.60      
2023-04-05 48.89      
2023-04-04 50.14      
2023-04-03 48.89      
2023-04-02 49.84      
2023-04-01 49.49      
2023-03-31 49.30      
2023-03-30 48.80      
2023-03-29 47.84      
2023-03-28 48.59      
2023-03-27 49.72      
2023-03-26        
2023-03-25        
2023-03-24        
2023-03-23 48.70      
2023-03-22 48.36      
2023-03-21 47.85      
2023-03-20 47.71      
2023-03-19 47.84      
2023-03-18 48.04      
2023-03-17 48.07      
2023-03-16 47.76      
2023-03-15 46.98      
2023-03-14 46.61      
2023-03-13 46.54      
2023-03-12 46.41      
2023-03-11 46.06      
2023-03-10 46.14      
2023-03-09 45.37      
2023-03-08 46.23      
2023-03-07 46.03      
2023-03-06 45.57      
2023-03-05 46.28      
2023-03-04 46.56      
2023-03-03 46.84      
2023-03-02 46.38      
2023-03-01 45.77      
2023-02-28 45.12      
2023-02-27 45.47      
2023-02-26 46.05      
2023-02-25 45.50      
2023-02-24 45.13      
2023-02-23 45.58      
2023-02-22 46.40      
2023-02-21 47.27      
2023-02-20 47.35      
2023-02-19 47.06      
2023-02-18 46.63      
2023-02-17 46.12      
2023-02-16 45.63      
2023-02-15 45.54      
2023-02-14 46.06      
2023-02-13 46.59      
2023-02-12 46.45      
2023-02-11 46.35      
2023-02-10 46.44      
2023-02-09 46.53      
2023-02-08 46.37      
2023-02-07 46.14      
2023-02-06 46.28      
2023-02-05 46.72      
2023-02-04 46.07      
2023-02-03 46.11      
2023-02-02 45.88      
2023-02-01 45.99      
2023-01-31 45.66      
2023-01-30 45.71      
2023-01-29 46.42      
2023-01-28 46.85      
2023-01-27 47.03      
2023-01-26 47.14      
2023-01-25 47.14      
2023-01-24 47.29      
2023-01-23 51.95      
2023-01-22 49.72      
2023-01-21 48.24      
2023-01-20 48.92      
2023-01-19 47.23      
2023-01-18 48.07      
2023-01-17 48.34      
2023-01-16 48.40      
2023-01-15 48.68      
2023-01-14 48.91      
2023-01-13 48.57      
2023-01-12 48.76      
2023-01-11 48.45      
2023-01-10 48.59      
2023-01-09 48.69      
2023-01-08 48.48      
2023-01-07 48.11      
2023-01-06 48.02      
2023-01-05 48.01      
2023-01-04 48.06      
2023-01-03 47.98      
2023-01-02 47.78      
2023-01-01 48.99      

Data Methods, Notes, Citations

Data Methods

  1. Data Courtesy of CDEC
  2. Hourly data for American R blw Watt Ave Bridge (AWB) is retrieved from CDEC on a daily basis.
  3. Columbia Basin Research (CBR) QA/QC process on AWB 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 record for 65F exceedance.
  7. Examine daily average data record for 68F exceedance.

Target Analysis Criteria

Please refer to the American River Group (ARG) Annual Report of Activities 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

May 15 through October 31 daily average water temperature of 65°F (or target temperature determined by temperature model) or lower at Watt Avenue Bridge. When the target temperature requirement cannot be met because of limited coldwater availability in Folsom Reservoir, then the target daily average water temperature at Watt Avenue may be increased incrementally (i.e., no more than 1°F every 12 hours) to as high as 68°F. November 1 through December 31 daily average water temperature of 56°F target if cold water pool allows. A temperature higher than 56°F may be targeted based on temperature modeling results.
Citation
Columbia Basin Research, University of Washington. (2023). SacPAS Lower American Temperature Target Analysis. Available from www.cbr.washington.edu/sacramento/data/tc_american.html
Generated: 07 Jun 2023 06:45:02 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/