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Dunn Mill: 70 MSHA citations Metal/Non-Metal

Barstow, San Bernardino County, CA  ·  Intermittent
MSHA Mine ID: 0401097

Dunn Mill has $8K in proposed MSHA penalties and $1K outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
10
Years on record
1983–1992
Latest incident
Oct 1992
Compliance record
MSHA citations since 2000
70
citations
11
significant & substantial
$8,451
proposed penalties
$7,357
paid to date
87% of proposed penalties paid to date, a $1,094 gap.
Source: MSHA violations data, updated weekly.
See Pacific Mining and Minerals, LLC's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
34
inspections on record
522
inspection hours
n/a
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.
Rate withheld: 522 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Dunn Mill has $8K in proposed MSHA penalties and $1K 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.
$8K
proposed penalties
$8K
current assessed
$7K
paid to date
$1K
outstanding
70 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-03-18.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘ Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
15.7%
significant & substantial
11.4%
high negligence or reckless
15.7%
reasonably likely or greater
40.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 18.6% low, 70.0% moderate, 11.4% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
Health sampling
ⓘ A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
ⓘ Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2024-12-18
0%
of limit-tested samples over the exposure limit
7
samples
3
limit-tested
Most sampled contaminants
  • Unlisted Particulate, respirable, <1% Qtz3
  • Quartz, respirable, >1% Qtz2
  • Nuisance dust, respirable, <1% Qtz1
  • Respirable dust, <.1mg1
Show the individual readings (7)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-12-18 Unlisted Particulate, respirable, <1% Qtz 1.05 Dry Screen Plant Operator
2020-09-17 Respirable dust, <.1mg 0 Utility Man
2020-09-17 Nuisance dust, respirable, <1% Qtz 0.45 10 0.05 Utility Man
2018-06-21 Unlisted Particulate, respirable, <1% Qtz 0.31 Lab Technician
2018-06-21 Unlisted Particulate, respirable, <1% Qtz 0.2 Laborer, Bullgang
2001-11-20 Quartz, respirable, >1% Qtz 0.62 2.79 0.22 Bagging Operator
2001-11-20 Quartz, respirable, >1% Qtz 0.28 2.16 0.13 Bagging Operator

Area samples (mill and shop air)

Last sampled: 2024-12-18
3
samples
Show the individual readings (6)
Date Contaminant Concentration Limit Conc / limit Area sampled
2024-12-18 ANALYZED BULK DUST MASS 0 MP CRUSHING
2024-12-18 QUARTZ (BULK DUST) 0 MP CRUSHING
2024-12-18 ANALYZED BULK DUST MASS 0 MP BAGGING/PACKAGING
2024-12-18 QUARTZ (BULK DUST) 0 MP BAGGING/PACKAGING
2024-12-18 ANALYZED BULK DUST MASS 0 MP BAGGING/PACKAGING
2024-12-18 QUARTZ (BULK DUST) 0 MP BAGGING/PACKAGING
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.
Ownership history
  1. American Borate Company 1950 to 2007
  2. Carlton Global Resources LLC 2007 to 2011
  3. Advanced Bio-Mineral Technologies, LLC 2011 to 2016
  4. Advanced Bio-Mineral Technologies, LLC. DEL. 2016 to 2019
  5. Materials Solutions, LLC 2019 to 2020
  6. Cal State Milling, LLC 2020 to 2023
  7. Pacific Mining and Minerals, LLC 2023 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 2
2025 3
2024 2
2023 3
2022 7
2021 11
2020 10
2019 4
2018 6
2017 3
2007 4
2006 3
2005 3
2004 3
2003 3
2002 3
2001 3
2000 3
Source: MSHA quarterly employment and production, updated weekly.

Dunn 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.
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
2026 Q2 220 0 0 0.0
2026 Q1 100 4 2 40000.0
2025 Q4 400 0 0 0.0
2025 Q3 400 0 0 0.0
2025 Q2 240 0 0 0.0
2025 Q1 200 0 0 0.0
2024 Q4 240 2 0 8333.3
2024 Q3 240 0 0 0.0
Show 56 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 400 0 0 0.0
2024 Q1 48 3 0 62500.0
2023 Q4 20 0 0 0.0
2023 Q3 20 0 0 0.0
2023 Q2 154 0 0 0.0
2023 Q1 1,768 2 0 1131.2
2022 Q4 2,316 0 0 0.0
2022 Q3 2,616 0 0 0.0
2022 Q2 2,601 2 1 768.9
2022 Q1 2,803 0 0 0.0
2021 Q4 3,985 5 0 1254.7
2021 Q3 6,104 1 1 163.8
2021 Q2 4,141 0 0 0.0
2021 Q1 4,792 0 0 0.0
2020 Q4 4,280 0 0 0.0
2020 Q3 5,720 0 0 0.0
2020 Q2 4,527 0 0 0.0
2020 Q1 409 0 0 0.0
2019 Q4 1,540 7 2 4545.5
2019 Q1 82 0 0 0.0
2018 Q4 2,480 1 0 403.2
2018 Q2 4,853 7 1 1442.4
2018 Q1 1,192 0 0 0.0
2017 Q3 998 0 0 0.0
2017 Q2 1,511 0 0 0.0
2017 Q1 1,470 0 0 0.0
2007 Q2 2,928 0 0 0.0
2007 Q1 777 0 0 0.0
2006 Q4 1,591 0 0 0.0
2006 Q3 1,449 4 0 2760.5
2006 Q2 1,573 0 0 0.0
2006 Q1 1,286 0 0 0.0
2005 Q4 1,286 0 0 0.0
2005 Q3 1,441 0 0 0.0
2005 Q2 1,367 2 0 1463.1
2005 Q1 1,524 0 0 0.0
2004 Q4 1,006 0 0 0.0
2004 Q3 1,539 0 0 0.0
2004 Q2 1,570 3 0 1910.8
2004 Q1 1,385 0 0 0.0
2003 Q4 1,270 6 0 4724.4
2003 Q3 1,319 0 0 0.0
2003 Q2 1,482 3 0 2024.3
2003 Q1 1,474 0 0 0.0
2002 Q4 1,223 1 1 817.7
2002 Q3 1,415 0 0 0.0
2002 Q2 1,524 3 2 1968.5
2002 Q1 1,498 0 0 0.0
2001 Q4 1,298 4 1 3081.7
2001 Q3 1,355 5 0 3690.0
2001 Q2 1,417 0 0 0.0
2001 Q1 1,510 0 0 0.0
2000 Q4 1,296 0 0 0.0
2000 Q3 1,395 0 0 0.0
2000 Q2 1,498 4 0 2670.2
2000 Q1 1,586 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

10 on file

1992 · 2 incidents

October 29, 1992 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman OTHER
American Borate Company · Struck by flying object

EMPLOYEE WAS CLEANING UP DUSTY MATERIAL AT THE 54IN BUCKET ELEVATOR PIT WITH A SHOVEL WIND BLEW MATERIAL INTO HIS LEFT EYE CAUSING A POSSIBLE SCRATCH

February 18, 1992 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
American Borate Company · Fall from piled material

EMPLOYEE CLAIMS HE WAS ON TOP OF BAG STOCK PILE INSTEAD OF CLIMBING DOWN HE SAYS HE JUMPED DOWN ABOUT 10FT & STRUCK HIS LEFT SIDE ON LOADER BUCKET

1991 · 1 incident

April 29, 1991 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
American Borate Company · Rubbed or abraded

SWEEPING UP PUMICE FINES BLEW IN EYES RUBBED EYE SCRATCHED EYE

1990 · 3 incidents

July 25, 1990 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman OTHER
American Borate Company · Absorption of radiations, caustics, toxic and noxious substances

HE SAYS HE IS NOT SURE WHERE IT HAPPENED OR IF IT HAPPENED HERE SOME KIND OF BUG BITE 1IN BELOW THE ANKLE RT FOOT HE WENT TO DOC & RECEIVED 10 DAYS OFF

May 7, 1990 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
American Borate Company · Struck by flying object

EMPLOYEE WAS KNOCKING ROLL OFF MILL JOURNAL WITH A HAMMER CHIP OF METAL FLEW OFF STRICKING HIM ON RIGHT HAND

April 6, 1990 CA · Metal/Non-Metal HANDLING OF MATERIALS
American Borate Company · Over-exertion in lifting objects

EMPL WAS DUMPING TALC INTO GRIZZLEY WHEN BIG ROCK WAS LEFT ON GRIZZLY & EMPL TRIED TO REMOVE IT B Y LIFTING IT INTO LOADER BUCKET STRAINING BACK.

1989 · 1 incident

October 10, 1989 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
American Borate Company · Struck by... (Not Elsewhere Classified)

CHANGING ROLLERS AT MILL ROLLER CAME BACK AND STRUCK EMP R HAND

1988 · 1 incident

April 13, 1988 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
American Borate Company · Over-exertion (Not Elsewhere Classified)

EMPL WAS STACKING 50 LBS. GAGS CONTAINING ZIOLITE MATERIAL OFF OF CONVEY BELT ONTO PALLET. HE TURNED WRONG WAY TWISTING & HURTING LOWER BACK.

1986 · 1 incident

April 3, 1986 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
American Borate Company · Fall to lower level, (Not Elsewhere Classified)

EMPLOYEE WAS TI1HTNING JOURNAL CAP ON RAYMOND MILL WRENCH SLIPPED AND HE FELL 5 TO 6 FT TO THE FLOOR STRIKING COCCYX TAILBONE.

1983 · 1 incident

January 7, 1983 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman DISORDERS (REPEATED TRAUMA)
American Borate Company · Over-exertion (Not Elsewhere Classified)

EMPLOYEE STATES THAT SHE WAS SHOVELING AROUND R-SILOS AND FELT PAINS IN HER RIGHT WRIST AND LOWER BACK