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Yosemite National Park
Annual Reports

Drinking Water Quality Consumer Confidence Reports


Section 106 of the National Historic Preservation Act Annual Reports

Rockfall area and talus slope at base of Three Brothers in Yosemite Valley.  

Did You Know?
In March 1987, the largest historical rockfall in Yosemite National Park deposited an estimated 1.5 million tons of debris at the base of Three Brothers, closing Northside Drive for several months.

Last Updated: June 23, 2009 at 22:33 EST