Day Tunnel

Day Tunnel (HMZNB)

Location: San Jose, CA 95120 Santa Clara County
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Country: United States of America
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N 37° 10.965', W 121° 50.278'

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Significant Addition to New Almaden's Rich Mining Operation
Toxic gases and underground water posed perils and problems for miners in search of valuable cinnabar ore. Under Sherman Day's suggestion, the "New Tunnel" was dug at the 800 foot level to help ventilate and drain the vast catacombs of underground tunnels and shafts. Later re-named the "Day Tunnel", this new passage into some of the mountain's hardest rock proved to be quite profitable. For much of the 1870s, miners hauled nearly all of the company's cinnabar out through this one opening.

It was also Sherman Day who suggested building a new road (now known as the Randol Trail) for easier access to the mine and tunnel. Although the Day Tunnel entrance and planilla are not visible today, evidence of the tons of rock that passed through them can be seen along and below the trail.
Placed ByNew Almaden Quicksilver County Park Association
Marker ConditionNo reports yet
Date Added Friday, September 12th, 2014 at 2:13pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10S E 603147 N 4115777
Decimal Degrees37.18275000, -121.83796667
Degrees and Decimal MinutesN 37° 10.965', W 121° 50.278'
Degrees, Minutes and Seconds37° 10' 57.90" N, 121° 50' 16.68" W
Driving DirectionsGoogle Maps
Area Code(s)408
Closest Postal AddressAt or near 6629-18235 Randol Trail, San Jose CA 95120, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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