Chinook Salmon Occurances

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USGS water temperature and stream discharge station, Clear Creek near Igo CaliforniaStream Discharge and Water Temperature Monitoring Stations in the Central Valley of California

Web Portal

The health and status of Chinook salmon in the Central Valley of California are intimately linked to stream discharge and water temperature.

Various web sites provide data for monitoring stations that collect stream discharge and water temperature in the state of California. None of these websites provides a simple tool showing where the distribution of Chinook salmon overlaps monitoring stations.

The Google Earth web portal described below provides a simple tool for determining where Chinook salmon and stream discharge and water temperature monitoring stations overlap in the Central Valley. Google Earth was chosen because this background theme is widely used by fisheries biologists and the general public.

Portal Has 2 Sets Of Data

Download tables listing monitoring stations in Excel format: stream discharge stations (XLS), water temperature stations (XLS), station measuring both discharge and temperature (XLS).

Our Process

Watersheds Used:
The streams depicted here reflect the following high priority watersheds where Chinook salmon occur.

American River, Antelope Creek, Battle Creek, Bear River, Big Chico Creek, Butte Creek, Calaveras River, Clear Creek, Cosumnes River, Cottonwood Creek, Cow Creek, Deer Creek, Feather River, Merced River, Mill Creek, seven 'miscellaneous creeks' above the Red Bluff Diversion Dam, Mokelumne River, Paynes Creek, Sacramento River mainstem, Stanislaus River, Tuolumne River and Yuba River.

There may be additional, smaller watersheds where Chinook salmon occur in the Central Valley and where stream discharge and water temperature are monitored, but these watersheds and monitoring stations are not reflected in this web portal.

Process for Determining Where Chinook Salmon Occur:
After we identified the watersheds, we assessed where Chinook salmon could occur in these watersheds. For watersheds that possess large dams, it is assumed the upstream extent of Chinook salmon distribution ends at the base of large dams. For example, on the American River it is assumed that the upstream distribution of Chinook salmon ends at the base of Nimbus Dam.

To determine the upstream extent of Chinook salmon in watersheds lacking large dams (e.g., Deer Creek), Service staff contacted fisheries biologists with the California Department of Fish and Game and USFWS to acquire their expert opinion as to where the upstream extent of Chinook salmon ended.

Process for Selecting Stations:
After we determined the distribution of Chinook salmon in 22 high-priority watersheds, we queried the U.S. Geological Survey's national Water-Data Site Information website and the California Department of Water Resource's California Data Exchange Center website to decide where stream discharge and water temperature monitoring stations overlapped the distribution of Chinook salmon.

Data for Each Station:
For each stream discharge and water temperature monitoring station that overlaps the distribution of Chinook salmon, we provide a data summary. The different types of data we summarize for each station is listed in this PDF document (17 KB).

Alternate Instructions for Using Google Fusion

The data may also be viewed in Google Fusion. When you go to that page, you will see the file in a table format. After clicking on the link to a table, select Map from Visualize in the menu bar.


After opening a map, query a point by clicking on it. (Orange "balloons" with black dots.)


You must click directly on stream label points (red dots). Otherwise, you will get an unlabeled stream segment.

Chinook Salmon Streams

GIS File

Shape file (2.5 MB ZIP)

Contact our office at (916) 414-6600 for more information.