The Upper Tuolumne River Ecosystem Program: Data

Data collected by the SFPUC within the upper Tuolumne River watershed above Don Pedro Reservoir are available for download below. Datasets are subjected to a rigorous quality assurance/quality control process, however, the SFPUC does not guarantee the accuracy of the data and cannot be held responsible for missing data or errors.

Water temperature

The SFPUC supplements existing U.S. Geological Survey (USGS) gages in the upper Tuolumne River watershed by maintaining a separate network of water temperature monitoring stations. Some SFPUC monitoring locations are redundant with USGS gage locations. Data are provided in Microsoft Excel format and updated as new data becomes available.

SFPUC upper Tuolumne River watershed water temperature data, metadata, and map.
Download ZIP file (62.5MB). Updated September 2016.

About the Program

The Tuolumne River is located on the west slope of the Sierra Nevada in central California. With headwaters in Yosemite National Park, the Tuolumne flows westward 150 miles to its confluence with the San Joaquin River in California's Central Valley.

The Upper Tuolumne River Ecosystem Program (UTREP) is a collaborative, long-term, science-based river management program led by the San Francisco Public Utilities Commission (SFPUC).

The UTREP monitors river ecosystem conditions and develops recommendations for river management downstream of Hetch Hetchy Project facilities to support broad river ecosystem values, while maintaining water supply reliability for 2.6 million San Francisco Bay Area customers and providing clean hydropower for San Francisco municipal facilities.

Scientific collaborators include Yosemite National Park, the US Fish and Wildlife Service, Stanislaus National Forest, consultants, researchers, and academics.

STATUS: UTREP efforts are currently focused on technical review and revision of the O'Shaughnessy Dam Instream Flow Management Plan and routine annual monitoring.