ZIMMERMAN MINE Metal/Non-Metal
Sloan Materials, LLC
· Surface
Controlled by
Randal Sloan
Leonardtown,
St Marys County,
MD
·
Active
MSHA Mine ID: 1800739
ZIMMERMAN MINE has $24K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2000
113
citations
37
significant & substantial
$23,880
proposed penalties
$23,880
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
64
inspections on record
1,120
inspection hours
10.1
citations per 100 inspection hours
ⓘ
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.113 citations across 1,120 inspection hours.
Source: MSHA inspections data, updated weekly.
ZIMMERMAN MINE has $24K in proposed MSHA penalties and $0 outstanding across 0 contested dockets.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$24K
proposed penalties
$24K
current assessed
$24K
paid to date
$0
outstanding
113 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-04-01.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also
the operator's enforcement record
Quarterly safety rates
ⓘ
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 3,450 | 0 | 0 | 0.0 |
| 2025 Q3 | 3,135 | 0 | 0 | 0.0 |
| 2025 Q2 | 3,255 | 0 | 0 | 0.0 |
| 2025 Q1 | 3,162 | 0 | 0 | 0.0 |
| 2024 Q4 | 2,831 | 0 | 0 | 0.0 |
| 2024 Q3 | 4,080 | 0 | 0 | 0.0 |
| 2024 Q2 | 4,230 | 0 | 0 | 0.0 |
| 2024 Q1 | 3,845 | 0 | 0 | 0.0 |
Show 95 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 3,745 | 0 | 0 | 0.0 |
| 2023 Q3 | 3,770 | 0 | 0 | 0.0 |
| 2023 Q2 | 3,215 | 0 | 0 | 0.0 |
| 2023 Q1 | 3,437 | 0 | 0 | 0.0 |
| 2022 Q4 | 4,552 | 1 | 0 | 219.7 |
| 2022 Q3 | 5,050 | 0 | 0 | 0.0 |
| 2022 Q2 | 5,050 | 0 | 0 | 0.0 |
| 2022 Q1 | 4,006 | 1 | 0 | 249.6 |
| 2021 Q4 | 5,095 | 0 | 0 | 0.0 |
| 2021 Q3 | 4,425 | 0 | 0 | 0.0 |
| 2021 Q2 | 4,180 | 0 | 0 | 0.0 |
| 2020 Q4 | 4,300 | 0 | 0 | 0.0 |
| 2020 Q3 | 4,964 | 0 | 0 | 0.0 |
| 2020 Q2 | 3,720 | 3 | 0 | 806.5 |
| 2020 Q1 | 4,585 | 0 | 0 | 0.0 |
| 2019 Q4 | 4,570 | 6 | 0 | 1312.9 |
| 2019 Q3 | 5,193 | 3 | 1 | 577.7 |
| 2019 Q2 | 5,114 | 0 | 0 | 0.0 |
| 2019 Q1 | 4,330 | 2 | 0 | 461.9 |
| 2018 Q4 | 5,228 | 0 | 0 | 0.0 |
| 2018 Q3 | 4,490 | 0 | 0 | 0.0 |
| 2018 Q2 | 4,620 | 0 | 0 | 0.0 |
| 2018 Q1 | 3,380 | 0 | 0 | 0.0 |
| 2017 Q4 | 3,835 | 5 | 2 | 1303.8 |
| 2017 Q3 | 4,059 | 0 | 0 | 0.0 |
| 2017 Q2 | 4,085 | 0 | 0 | 0.0 |
| 2017 Q1 | 3,930 | 0 | 0 | 0.0 |
| 2016 Q4 | 3,435 | 2 | 0 | 582.2 |
| 2016 Q3 | 3,290 | 2 | 0 | 607.9 |
| 2016 Q2 | 3,090 | 0 | 0 | 0.0 |
| 2016 Q1 | 3,208 | 0 | 0 | 0.0 |
| 2015 Q4 | 2,960 | 0 | 0 | 0.0 |
| 2015 Q3 | 3,260 | 3 | 0 | 920.2 |
| 2015 Q2 | 2,790 | 0 | 0 | 0.0 |
| 2015 Q1 | 2,490 | 1 | 1 | 401.6 |
| 2014 Q4 | 3,467 | 0 | 0 | 0.0 |
| 2014 Q3 | 3,409 | 1 | 0 | 293.3 |
| 2014 Q2 | 3,325 | 0 | 0 | 0.0 |
| 2014 Q1 | 2,574 | 0 | 0 | 0.0 |
| 2013 Q4 | 2,135 | 0 | 0 | 0.0 |
| 2013 Q3 | 2,425 | 0 | 0 | 0.0 |
| 2013 Q2 | 2,510 | 2 | 2 | 796.8 |
| 2013 Q1 | 2,180 | 0 | 0 | 0.0 |
| 2012 Q4 | 2,435 | 0 | 0 | 0.0 |
| 2012 Q3 | 2,429 | 0 | 0 | 0.0 |
| 2012 Q2 | 2,200 | 2 | 0 | 909.1 |
| 2012 Q1 | 2,050 | 2 | 2 | 975.6 |
| 2011 Q4 | 1,576 | 0 | 0 | 0.0 |
| 2011 Q3 | 1,925 | 2 | 0 | 1039.0 |
| 2011 Q2 | 2,005 | 0 | 0 | 0.0 |
| 2011 Q1 | 2,450 | 0 | 0 | 0.0 |
| 2010 Q4 | 2,300 | 4 | 2 | 1739.1 |
| 2010 Q3 | 1,860 | 0 | 0 | 0.0 |
| 2010 Q2 | 2,850 | 5 | 4 | 1754.4 |
| 2010 Q1 | 2,650 | 0 | 0 | 0.0 |
| 2009 Q4 | 3,550 | 0 | 0 | 0.0 |
| 2009 Q3 | 3,475 | 0 | 0 | 0.0 |
| 2009 Q2 | 3,175 | 1 | 0 | 315.0 |
| 2009 Q1 | 585 | 0 | 0 | 0.0 |
| 2008 Q4 | 2,927 | 0 | 0 | 0.0 |
| 2008 Q3 | 2,850 | 0 | 0 | 0.0 |
| 2008 Q2 | 3,040 | 3 | 2 | 986.8 |
| 2008 Q1 | 2,702 | 0 | 0 | 0.0 |
| 2007 Q4 | 3,525 | 0 | 0 | 0.0 |
| 2007 Q3 | 3,550 | 6 | 2 | 1690.1 |
| 2007 Q2 | 3,850 | 0 | 0 | 0.0 |
| 2007 Q1 | 3,024 | 4 | 0 | 1322.8 |
| 2006 Q4 | 3,700 | 0 | 0 | 0.0 |
| 2006 Q3 | 4,250 | 0 | 0 | 0.0 |
| 2006 Q2 | 5,100 | 5 | 1 | 980.4 |
| 2006 Q1 | 4,310 | 7 | 1 | 1624.1 |
| 2005 Q4 | 8,650 | 0 | 0 | 0.0 |
| 2005 Q3 | 5,950 | 0 | 0 | 0.0 |
| 2005 Q2 | 5,700 | 0 | 0 | 0.0 |
| 2005 Q1 | 4,600 | 1 | 1 | 217.4 |
| 2004 Q4 | 4,850 | 0 | 0 | 0.0 |
| 2004 Q3 | 4,463 | 4 | 1 | 896.3 |
| 2004 Q2 | 3,650 | 0 | 0 | 0.0 |
| 2004 Q1 | 2,750 | 12 | 3 | 4363.6 |
| 2003 Q4 | 3,380 | 0 | 0 | 0.0 |
| 2003 Q3 | 2,998 | 0 | 0 | 0.0 |
| 2003 Q2 | 2,925 | 5 | 4 | 1709.4 |
| 2003 Q1 | 2,580 | 3 | 0 | 1162.8 |
| 2002 Q4 | 3,095 | 0 | 0 | 0.0 |
| 2002 Q3 | 2,624 | 0 | 0 | 0.0 |
| 2002 Q2 | 2,870 | 0 | 0 | 0.0 |
| 2002 Q1 | 2,140 | 3 | 1 | 1401.9 |
| 2001 Q4 | 2,380 | 0 | 0 | 0.0 |
| 2001 Q3 | 2,147 | 2 | 2 | 931.5 |
| 2001 Q2 | 2,465 | 0 | 0 | 0.0 |
| 2001 Q1 | 2,427 | 2 | 1 | 824.1 |
| 2000 Q4 | 2,177 | 0 | 0 | 0.0 |
| 2000 Q3 | 2,425 | 1 | 1 | 412.4 |
| 2000 Q2 | 2,500 | 0 | 0 | 0.0 |
| 2000 Q1 | 1,890 | 5 | 3 | 2645.5 |
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.
For insurers, brokers, and safety consultants
The full compliance file on ZIMMERMAN MINE
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.