CDFW Upper Sacramento River Basin Salmonid Monitoring

What's New

A new interactive story map (updated in May 2021) is now available to explore the Upper Sacramento River Basin Stranding Locations. Each tab highlights a different complex of stranding pools with a photo and information in the left story panel including the number of fish saved. On the right is an interactive map showing the pool locations. Clicking on each pool shows additional information and a photo if available.

CDFW Upper Sacramento River Basin Salmonid Monitoring

The Upper Sacramento River Basin (USRB) contains much of California's salmon and steelhead populations. This page contains salmon and steelhead assessment project files consisting of long term data, annual reports, databases, spreadsheets and descriptions of monitoring efforts.

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Map Viewer
No - CDFW Upper Sacramento River Basin Salmonid data are not available through the Map Viewer.

CalFish Tabular Data
No - CDFW Upper Sacramento River Basin Salmonid Monitoring data are not available through the CalFish database query.

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Pictures taken in the Upper Sacramento River Basin are available for download.

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2024 Winter-run Chinook Data file

This file contains updates of the 2024 Winter-run population in the upper Sacramento River. It is updated weekly, or as needed. Updates to carcass counts, aerial redd counts and shallow water redd counts are provided. Data contained within is draft and has not undergone final review or analysis and may change based upon these later reviews. Questions or needs concerning the data in this file can be addressed to Doug Killam at doug.killam@wildlife.ca.gov. Last updated8-21-24

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Salmonid Populations of the Upper Sacramento River Basin In 2022

Population sizes were estimated for Chinook Salmon and steelhead (where possible) passing upstream of Princeton, CA in the upper Sacramento River basin (USRB), (Figure 1). Annual population estimates for the USRB were determined through several methodologies including carcass surveys, hatchery counts, aerial and in-stream redd surveys, snorkel counts, angler interviews, video stations, DIDSON (acoustic sonar) or Vaki Riverwatcher counts in streams and in fish ladders. This report does not include salmonid information from tributaries that enter into the Sacramento River downstream of the town of Princeton (Butte Creek, Feather and American River). These and other lower Central Valley waterways are detailed in reports from other projects. A summary of the entire California Central Valley Chinook Salmon stocks is available annually in the California Department of Fish and Wildlife (CDFW) reports titled “Annual Report: Chinook Salmon Spawning Stocks in California’s Central Valley” (CDFW Annual Reports).

In 2022, there were an estimated 35,945 mature Chinook Salmon returning to the USRB that passed upstream of Princeton Ferry (includes angler catch). This includes an estimate of 7,773 late-fall-run, 6,036 winter-run, 1,697 spring-run, and 20,439 fall-run Chinook Salmon (Table 1). The majority (96%) of these salmon migrated above the Red Bluff Diversion Dam (RBDD) to spawn (or angler harvested) in the tributaries or in the Sacramento River upstream of Red Bluff. Additionally, 723 steelhead (Rainbow Trout greater than 16 inches long) were counted during monitoring operations for the 2021-2022 steelhead reporting year. revised 2-22-24

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Salmonid Populations of the Upper Sacramento River Basin In 2022 Data Supplement

Summary based Excel tables in this file supplement the "Salmonid Populations of the Upper Sacramento River Basin In 2022" pdf report. Readers interested in further analysis and data from the report will find excel spreadsheets with data summaries for most survey efforts in this file. For greater in-depth data needs please contact the author at doug.killam@wildlife.ca.gov. revised 2-22-24

Readers interested in conducting further analysis of the data provided in this report should be aware that the summaries of data herein might be generalized to fit the limited scope of the report. Calculations involving decimals often result in fish counts that when summed may be off one or two fish because of rounding for whole numbers. For specific analytical data needs, readers should directly contact the author for their needs and any limitations to the data. The author can be reached via e-mail at doug.killam@wildlife.ca.gov. This report, and others from this project, can be found on the Calfish.org website. If interested, readers may also download the associated tables from this report in the original Excel formats to allow further analysis based on their individual needs or requirements. Interested readers can go to the Calfish.org website to view and download this and other files:
http://www.calfish.org/ProgramsData/ConservationandManagement/CentralValleyMonitoring/CDFWUpperSacRiverBasinSalmonidMonitoring.aspx
Special Notes: Readers of this and earlier reports should be aware that revisions to population estimates might occur at any time. Reader comments received by the author in the past have indicated that readers can be surprised by population numbers changing from one year to the next or inconsistent reporting of populations between reports. Many of the estimates are dependent on multiple sources of information (hatchery sex ratios, hatchery counts, aerial redd data, etc.) that may be revised after periods of time. These revisions are outside the control of the author and represent efforts to obtain the most accurate estimates for historical purposes. Should a conflict arise between a number in this report and a later report, readers should use the most recently published data as the most up-to-date source of information. An online summary of salmon populations is available on CDFW’s electronic summary of California’s Central Valley Chinook Salmon escapement titled “GrandTab”.

All Items File size 645 K DOWNLOAD

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