O'brion Pit Metal/Non-Metal
South Shore Sand & Gravel
· Surface
Controlled by
Frostman Ralph A
Bayfield County,
WI
·
Abandoned
MSHA Mine ID: 4702590
O'brion Pit has no reportable incidents on file with MSHA.
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Ownership history
- R Frostman Inc 1979 to 1980
- South Shore Sand & Gravel 1980 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 1998 | 0 |
| 1997 | 2 |
| 1996 | 2 |
| 1995 | 2 |
| 1994 | 2 |
| 1993 | 1 |
| 1992 | 2 |
| 1991 | 1 |
| 1990 | 2 |
| 1989 | 2 |
| 1988 | 2 |
| 1987 | 2 |
| 1986 | 3 |
| 1985 | 3 |
Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.
O'brion Pit sits in Bayfield County, Wisconsin, 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.Bayfield County, Wisconsin · Population 16,410
0.1%
Mining share of county employment
$69,609
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.