The Lawson Adit is a horizontal mine tunnel, or adit, on the UC Berkeley campus, near the Hearst Mining Building, dug directly through the Hayward Fault. [1] Started in 1916, the adit is named after Andrew Lawson, one-time Dean of the College of Mining at UC Berkeley. [2]
The adit was dug under the direction of Frank H. Probert, who had just previously been appointed Professor of Mining. [3] It was dug primarily for instructional purposes, with secondary hopes that it would represent a new source of water for the campus. [1] [4] Much of the equipment to dig and use the tunnel was donated by the mining industry in the San Francisco Bay area. [4] Although an initial report said that it was to go 1,800 feet into the Berkeley Hills, [3] the actual construction resulted in a mine tunnel of about 200 feet.
Between 1919 and 1930 the adit was used to give mining and metallurgy students hands-on training, specifically to provide "sound, practical training in drilling, drifting, blasting, timbering, and mine surveying." [1] [4] This training included instruction in the use of dynamite as well as the extraction of precious metals [1] and practice and demonstration of rescuing techniques. [5]
In 1935, Berkeley engineering students celebrated the annual March 15 Engineers' Day by putting together "a museum of historical electrical equipment," holding a dance at the Hotel Claremont, and engaging in a "mine rescue" in the Lawson Adit next to the Hearst Memorial Mining Building. [6]
Around 1939 the adit was extended to around 900 feet so that it intersected the Hayward Fault and could be used for a direct study of the fault [1] by George Louderback, a seismologist at UC Berkeley, to help determine the safety of building a new women's dormitory, Stern Hall. Louderback's studies in the adit revealed that the Hayward Fault at this point is surrounded by a particularly unstable mélange of serpentine and other metamorphic rocks. [7] He suggested that Stern Hall be built approximately fifty feet away from its original planned location. [1] [4]
After 1939, much of the extended adit eventually collapsed, with most collapses around the point where the adit intersects the fault. Today the adit is only maintained to a length of about 260 feet, [1] [4] and is not in use due to safety reasons. [8]
The Lawson Adit is a horizontal mine tunnel, or adit, on the UC Berkeley campus, near the Hearst Mining Building, dug directly through the Hayward Fault. [1] Started in 1916, the adit is named after Andrew Lawson, one-time Dean of the College of Mining at UC Berkeley. [2]
The adit was dug under the direction of Frank H. Probert, who had just previously been appointed Professor of Mining. [3] It was dug primarily for instructional purposes, with secondary hopes that it would represent a new source of water for the campus. [1] [4] Much of the equipment to dig and use the tunnel was donated by the mining industry in the San Francisco Bay area. [4] Although an initial report said that it was to go 1,800 feet into the Berkeley Hills, [3] the actual construction resulted in a mine tunnel of about 200 feet.
Between 1919 and 1930 the adit was used to give mining and metallurgy students hands-on training, specifically to provide "sound, practical training in drilling, drifting, blasting, timbering, and mine surveying." [1] [4] This training included instruction in the use of dynamite as well as the extraction of precious metals [1] and practice and demonstration of rescuing techniques. [5]
In 1935, Berkeley engineering students celebrated the annual March 15 Engineers' Day by putting together "a museum of historical electrical equipment," holding a dance at the Hotel Claremont, and engaging in a "mine rescue" in the Lawson Adit next to the Hearst Memorial Mining Building. [6]
Around 1939 the adit was extended to around 900 feet so that it intersected the Hayward Fault and could be used for a direct study of the fault [1] by George Louderback, a seismologist at UC Berkeley, to help determine the safety of building a new women's dormitory, Stern Hall. Louderback's studies in the adit revealed that the Hayward Fault at this point is surrounded by a particularly unstable mélange of serpentine and other metamorphic rocks. [7] He suggested that Stern Hall be built approximately fifty feet away from its original planned location. [1] [4]
After 1939, much of the extended adit eventually collapsed, with most collapses around the point where the adit intersects the fault. Today the adit is only maintained to a length of about 260 feet, [1] [4] and is not in use due to safety reasons. [8]