Clear Creek Water Temperature Threshold Analysis
Ecological Thresholds Queries
This page provides analysis, based on Reclamation 2019 Proposed Action, of current and historical water 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.
| Life Stage | Life Stage Dates |
Criterion | Possible Days |
Data Days |
Missing Data Days |
Total Period Analyzed | Criteria Exceedance | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Average Water Temperature |
Days in Threshold |
Days | First Day | Last Day | ||||||
| Juv Steelhead/Spring-Run Adults | 6/1-9/15 | Below/Equal 60°F | 0 | 0 | 0 | |||||
| Spring-Run Eggs/Pre-emergent Fry | 9/16-10/31 | Below/Equal 56°F | 0 | 0 | 0 | |||||
| Date | Value | Juvenile/Adults 60°F 6/1-9/15 |
Eggs/Fry 56°F 9/16-10/31 |
|---|---|---|---|
| Date | Value | Juvenile/Adults 60°F 6/1-9/15 |
Eggs/Fry 56°F 9/16-10/31 |
| 2025-05-20 | 52.07 | ||
| 2025-05-19 | 52.00 | ||
| 2025-05-18 | 51.80 | ||
| 2025-05-17 | 51.65 | ||
| 2025-05-16 | 51.90 | ||
| 2025-05-15 | 52.49 | ||
| 2025-05-14 | 53.00 | ||
| 2025-05-13 | 52.73 | ||
| 2025-05-12 | 51.93 | ||
| 2025-05-11 | 52.93 | ||
| 2025-05-10 | 54.34 | ||
| 2025-05-09 | 53.85 | ||
| 2025-05-08 | 53.95 | ||
| 2025-05-07 | 53.47 | ||
| 2025-05-06 | 53.27 | ||
| 2025-05-05 | 52.49 | ||
| 2025-05-04 | 52.56 | ||
| 2025-05-03 | 53.37 | ||
| 2025-05-02 | 53.34 | ||
| 2025-05-01 | 53.08 | ||
| 2025-04-30 | 53.23 | ||
| 2025-04-29 | 52.52 | ||
| 2025-04-28 | 52.24 | ||
| 2025-04-27 | 50.42 | ||
| 2025-04-26 | 50.45 | ||
| 2025-04-25 | 51.20 | ||
| 2025-04-24 | 52.65 | ||
| 2025-04-23 | 52.81 | ||
| 2025-04-22 | 52.43 | ||
| 2025-04-21 | 52.16 | ||
| 2025-04-20 | 51.96 | ||
| 2025-04-19 | 51.50 | ||
| 2025-04-18 | 51.55 | ||
| 2025-04-17 | 52.45 | ||
| 2025-04-16 | 52.73 | ||
| 2025-04-15 | 52.05 | ||
| 2025-04-14 | 51.58 | ||
| 2025-04-13 | 51.38 | ||
| 2025-04-12 | 51.41 | ||
| 2025-04-11 | 51.97 | ||
| 2025-04-10 | 51.96 | ||
| 2025-04-09 | 51.44 | ||
| 2025-04-08 | 50.97 | ||
| 2025-04-07 | 51.23 | ||
| 2025-04-06 | 50.49 | ||
| 2025-04-05 | 50.25 | ||
| 2025-04-04 | 49.75 | ||
| 2025-04-03 | 49.49 | ||
| 2025-04-02 | 48.95 | ||
| 2025-04-01 | 48.63 | ||
| 2025-03-31 | 48.90 | ||
| 2025-03-30 | 48.54 | ||
| 2025-03-29 | 48.75 | ||
| 2025-03-28 | 49.88 | ||
| 2025-03-27 | 50.06 | ||
| 2025-03-26 | 50.61 | ||
| 2025-03-25 | 50.87 | ||
| 2025-03-24 | 50.79 | ||
| 2025-03-23 | 49.82 | ||
| 2025-03-22 | 49.08 | ||
| 2025-03-21 | 48.25 | ||
| 2025-03-20 | 47.48 | ||
| 2025-03-19 | 47.14 | ||
| 2025-03-18 | 47.48 | ||
| 2025-03-17 | 48.12 | ||
| 2025-03-16 | 47.40 | ||
| 2025-03-15 | 46.80 | ||
| 2025-03-14 | 45.95 | ||
| 2025-03-13 | 47.21 | ||
| 2025-03-12 | 47.43 | ||
| 2025-03-11 | 47.67 | ||
| 2025-03-10 | 47.34 | ||
| 2025-03-09 | 47.23 | ||
| 2025-03-08 | 46.92 | ||
| 2025-03-07 | 46.78 | ||
| 2025-03-06 | 47.01 | ||
| 2025-03-05 | 47.18 | ||
| 2025-03-04 | 47.19 | ||
| 2025-03-03 | 46.94 | ||
| 2025-03-02 | 47.50 | ||
| 2025-03-01 | 47.48 | ||
| 2025-02-28 | 47.59 | ||
| 2025-02-27 | 47.08 | ||
| 2025-02-26 | 46.76 | ||
| 2025-02-25 | 46.48 | ||
| 2025-02-24 | 47.24 | ||
| 2025-02-23 | 47.45 | ||
| 2025-02-22 | 46.66 | ||
| 2025-02-21 | 46.38 | ||
| 2025-02-20 | 46.07 | ||
| 2025-02-19 | 46.58 | ||
| 2025-02-18 | 46.24 | ||
| 2025-02-17 | 46.38 | ||
| 2025-02-16 | 46.80 | ||
| 2025-02-15 | 46.25 | ||
| 2025-02-14 | 46.77 | ||
| 2025-02-13 | 45.17 | ||
| 2025-02-12 | 45.08 | ||
| 2025-02-11 | 45.26 | ||
| 2025-02-10 | 45.84 | ||
| 2025-02-09 | 46.14 | ||
| 2025-02-08 | 46.29 | ||
| 2025-02-07 | 46.90 | ||
| 2025-02-06 | 46.80 | ||
| 2025-02-05 | 47.55 | ||
| 2025-02-04 | 50.19 | ||
| 2025-02-03 | 49.94 | ||
| 2025-02-02 | 49.34 | ||
| 2025-02-01 | 46.33 | ||
| 2025-01-31 | 45.73 | ||
| 2025-01-30 | 45.10 | ||
| 2025-01-29 | 45.13 | ||
| 2025-01-28 | 45.27 | ||
| 2025-01-27 | 45.47 | ||
| 2025-01-26 | 45.09 | ||
| 2025-01-25 | 45.33 | ||
| 2025-01-24 | 46.15 | ||
| 2025-01-23 | 46.30 | ||
| 2025-01-22 | 46.12 | ||
| 2025-01-21 | 45.46 | ||
| 2025-01-20 | 45.87 | ||
| 2025-01-19 | 45.85 | ||
| 2025-01-18 | 46.22 | ||
| 2025-01-17 | 46.25 | ||
| 2025-01-16 | 46.83 | ||
| 2025-01-15 | 47.83 | ||
| 2025-01-14 | 47.67 | ||
| 2025-01-13 | 47.61 | ||
| 2025-01-12 | 47.23 | ||
| 2025-01-11 | 47.57 | ||
| 2025-01-10 | 48.29 | ||
| 2025-01-09 | 48.64 | ||
| 2025-01-08 | 48.26 | ||
| 2025-01-07 | 48.38 | ||
| 2025-01-06 | 49.08 | ||
| 2025-01-05 | 49.08 | ||
| 2025-01-04 | 48.78 | ||
| 2025-01-03 | 50.02 | ||
| 2025-01-02 | 49.65 | ||
| 2025-01-01 | 49.03 |
Data Methods and Notes
Data Methods
- Data Courtesy of CDEC and US Geological Survey
- Hourly data for Clear Creek nr Igo (IGO) is retrieved from CDEC on a daily basis.
- Columbia Basin Research (CBR) QA/QC process on IGO hourly data for outliers, false data (e.g., 32°F measured by satellite), and data outside expected range of observation (e.g., 90°F). Data loaded into CBR database.
- CBR calculates Daily Average values based on CBR cleaned hourly values.
- Query for daily average water temperature for selected year.
- Examine daily average data for 60°F and 56°F 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.