Lawson Adit (Berkeley)

An old adit which was drilled by mining students in 1919 and used until the 1930s for instruction purposes.
It was extended from 200 feet to 900 feet east to analyze the Hayward Fault. Due to numerous collapses over the years, the adit is now closed.

seismo.berkeley.edu/seismo/geotour/mining.html
www.coe.berkeley.edu/labnotes/1002/history.html