The Upper Tuolumne RiverEcosystem Program

A collaborative program led by the San Francisco Public Utilities Commission to advance understanding and stewardship of the Upper Tuolumne River ecosystem.

About UTREP

Background, mission, and goals of the Upper Tuolumne River Ecosystem Program.

Access meeting agendas and presentations from biannual workgroup meetings.

Interactive data visualization and analysis tools.

Current Release

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Below Hetch Hetchy · live USGS gage

Water Temperature

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Below Hetch Hetchy · live USGS gage

Newest first

Library Document

Arthropod Assemblages in a Montane Wetland Complex: Influences of Adjoining Lotic and Lentic Habitat and Temporal Variability

Added 3 months ago

Library Document

Effects of Engineered Dam Releases on Benthic Assemblages During Drought and Comparison With Unregulated Reaches

Added 3 months ago

Workgroup Meeting Materials

April 9, 2026

Added 6 months ago

Workgroup Meeting Materials

November 12, 2025

Added 11 months ago