Old browser warning

Site look funky?  Your browser is either Internet Explorer (hit refresh (F5) several times due to a bug in Microsoft's code that we can't work around) or is 10 years old and standards-based layouts and styling confuse it.   Consider updating.  One excellent option is Mozilla Firefox, versions of which are available for Linux, Mac and Windows. Safari 1.0+ and IE 6.0+ are also supported.

Gauge Information

Gauge Description:

Hetch Hetchy reservoir spills during the spring of many years.   Most spill flows will probably be too high for boating in this section, so your best bet will be at the very beginning and the very end of spill.    There is a USGS gauge available for this section.    Ben Stookesbury reported after a 2008 trip that he would have prefered more than 200 cfs, but not a lot more. 

Gauge Information

Name Range Difficulty Updated Level
usgs-11276600 200 - 600 cfs V 00h47m 347 cfs (running)

RangeWater LevelDifficultyComment
200 - 600 cfs barely runnable-high runnable V

Report - Reports of Tuolumne 2) Hetch Hetchy to Early Intake and related gauges

Reports give the public a chance to report on river conditions throughout the country as well as log the history of a river.


When River/Gauge Subject Level Reporter
9y318d11h31m Tuolumne [CA] O'Shaughnessy Dam, Hetch Hetchy n/a Thomas O'Keefe