Upper Tuolumne River ecosystem landscape showing dam and canyon

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.

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About UTREP

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

Workgroup Meetings

Access meeting agendas and presentations from biannual workgroup meetings.

Data

Check out current conditions and explore UTREP data.

Latest Updates

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Workgroup Meeting

November 12, 2025

Added 1 month ago

Agenda and presentations available

Library Document

Environmental Flow Study for the Hetch Hetchy Reach - Early Workgroup Draft

Added 1 year ago

Report