Independent Mine

Independent Mine (HM1RGF)

Location: Antioch, CA 94509 Contra Costa County
Country: United States of America

N 37° 57.514', W 121° 51.807'

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Inscription
These stones and bolts are the remains of the Independent Shaft hoist works. The depression to your right marks the location of the 710-foot sealed shaft, the most northerly mine entry on the Mt. Diablo Coal Field. The boiler attached to the bolts exploded in 1873, killing two men and blowing pats of the boiler more than a quarter of a mile.
The Independent Shaft was sunk in 1865. By 1867 the company had failed and the shaft became inactive except as a means of pumping water from the neighboring Eureka Mine. Pittsburg Mining Company eventually purchased the property and returned the shaft to service as a working entry around 1900. Within a short time - probably no more than a year - the shaft was permanently abandoned as high production costs, the availability of higher quality coal from Washington Territory, and the advent of oil as an industrial power source ended mining on the ? (Mt Diablo Coal Field?)
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Details
HM NumberHM1RGF
Placed ByEast Bay Regional Park District
Marker ConditionNo reports yet
Date Added Monday, April 4th, 2016 at 1:01pm PDT -07:00
Locationbig map
UTM (WGS84 Datum)10S E 599843 N 4201827
Decimal Degrees37.95856667, -121.86345000
Degrees and Decimal MinutesN 37° 57.514', W 121° 51.807'
Degrees, Minutes and Seconds37° 57' 30.84" N, 121° 51' 48.42" W
Driving DirectionsGoogle Maps
Area Code(s)510, 925
Closest Postal AddressAt or near 5175 Somersville Rd, Antioch CA 94509, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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