Here are two maps of the tunnels and shafts of the New Almaden mine. The first shows the earlier development, while the second shows more or less the full development of the mining in the area. The maps were edited for clarity then georeferenced using QGIS software to overlay on a map of the park. I then added the trail map for the park from Santa Clara County data, in the form of Santa_Clara_County_Parks_Trails.shp. The result was exported as an image and turned into a pdf for convenient zoom and panning.
Plan of the mine pre-1885
Plan of the New Almaden Mine, from U.S. Geological Survey. Monograph XIII, Atlas Sheet IX. Compiled by F. Reade 1885. Giles Litho. & Liberty Printing Co. N.Y. Geo. F. Becker, Geologist in charge. See reference.
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Plan of the mine up to 1964
Composite map of the Underground Workings of the New Almaden and America Mines, Santa Clara County, California. From Plate 4, E. H. Bailey, and D. L. Everhart, "Geology and quicksilver deposits of the New Almaden district, Santa Clara county, California". Vol. 360. US Government Printing Office, (1964). See reference
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