Four Square Mill Metal/Non-Metal
Four Square Mine & Mill Company
· Facility
Controlled by
Halverson R D & K P Lancaster
San Bernardino County,
CA
·
Abandoned
MSHA Mine ID: 0404583
MSHA record for Four Square Mill (mine ID 0404583). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Ownership history
- Four Square Mine & Mill Company 1982 to present
Source: MSHA controller and operator history, updated weekly.
Four Square Mill sits in San Bernardino County, California, where the Census mining category is 0.1% of county employment.
Local economic context
ⓘ
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.San Bernardino County, California · Population 2,187,816
0.1%
Mining share of county employment
$82,184
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.