Mining Incidents

SIERRA ROCK PRODUCTS Metal/Non-Metal

Controlled by James D Hatler
JAMESTOWN, Tuolumne County, CA  ·  Active
MSHA Mine ID: 0403489

SIERRA ROCK PRODUCTS has $88K in proposed MSHA penalties and $0 outstanding across 11 contested dockets, plus health sampling and the full incident record.

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Fatalities
3
Total incidents
28
Years on record
1984–1995
Latest incident
Nov 1995
Compliance record
MSHA citations since 2000
222
citations
57
significant & substantial
$87,796
proposed penalties
$58,332
paid to date
66% of proposed penalties paid to date, a $29,464 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
71
inspections on record
1,384
inspection hours
16.0
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.
222 citations across 1,384 inspection hours.
Source: MSHA inspections data, updated weekly.

SIERRA ROCK PRODUCTS has $88K in proposed MSHA penalties and $0 outstanding across 11 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.
$88K
proposed penalties
$58K
current assessed
$58K
paid to date
$0
outstanding
214 assessments are final orders; 11 contested dockets.
As of the most recent assessment on 2026-02-24.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
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 2,825 0 0 0.0
2025 Q3 1,397 0 0 0.0
2025 Q2 3,358 17 3 5062.5
2025 Q1 2,176 0 0 0.0
2024 Q4 1,603 0 0 0.0
2024 Q3 978 0 0 0.0
2024 Q2 1,821 0 0 0.0
2024 Q1 1,436 1 0 696.4
Show 95 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 1,085 0 0 0.0
2023 Q3 2,312 5 3 2162.6
2023 Q2 1,061 0 0 0.0
2023 Q1 1,653 0 0 0.0
2022 Q4 1,829 0 0 0.0
2022 Q3 954 0 0 0.0
2022 Q2 1,273 0 0 0.0
2022 Q1 1,031 0 0 0.0
2021 Q4 495 0 0 0.0
2021 Q3 1,643 1 0 608.6
2021 Q2 2,012 0 0 0.0
2021 Q1 496 2 0 4032.3
2020 Q4 1,550 0 0 0.0
2020 Q3 1,961 7 0 3569.6
2020 Q2 1,097 2 0 1823.2
2020 Q1 1,199 6 2 5004.2
2019 Q4 1,332 0 0 0.0
2019 Q3 1,422 2 0 1406.5
2019 Q1 694 0 0 0.0
2018 Q4 1,408 0 0 0.0
2018 Q3 602 3 0 4983.4
2018 Q2 1,096 0 0 0.0
2018 Q1 805 1 0 1242.2
2017 Q4 1,404 0 0 0.0
2017 Q3 2,213 7 2 3163.1
2017 Q2 2,211 0 0 0.0
2017 Q1 1,964 0 0 0.0
2016 Q4 2,833 0 0 0.0
2016 Q3 2,837 0 0 0.0
2016 Q2 2,556 0 0 0.0
2016 Q1 1,272 12 1 9434.0
2015 Q4 620 0 0 0.0
2015 Q3 1,068 0 0 0.0
2015 Q2 1,878 20 6 10649.6
2015 Q1 2,271 9 3 3963.0
2014 Q4 2,971 0 0 0.0
2014 Q3 2,501 0 0 0.0
2014 Q2 2,578 0 0 0.0
2014 Q1 2,173 0 0 0.0
2013 Q4 2,701 2 0 740.5
2013 Q3 2,438 4 1 1640.7
2013 Q2 3,028 0 0 0.0
2013 Q1 1,101 4 0 3633.1
2012 Q4 1,737 0 0 0.0
2012 Q3 2,297 2 0 870.7
2012 Q2 2,037 0 0 0.0
2012 Q1 1,896 1 0 527.4
2011 Q4 2,451 0 0 0.0
2011 Q3 2,495 0 0 0.0
2011 Q2 1,901 2 1 1052.1
2011 Q1 1,839 4 2 2175.1
2010 Q4 2,821 0 0 0.0
2010 Q3 2,886 0 0 0.0
2010 Q2 2,444 20 6 8183.3
2010 Q1 1,310 0 0 0.0
2009 Q4 2,569 17 8 6617.4
2009 Q3 3,046 0 0 0.0
2009 Q2 3,153 4 0 1268.6
2009 Q1 2,415 0 0 0.0
2008 Q4 3,616 6 3 1659.3
2008 Q3 3,660 1 0 273.2
2008 Q2 4,201 0 0 0.0
2008 Q1 3,996 2 0 500.5
2007 Q4 4,007 0 0 0.0
2007 Q3 4,229 2 0 472.9
2007 Q2 4,740 0 0 0.0
2007 Q1 4,178 2 0 478.7
2006 Q4 4,278 0 0 0.0
2006 Q3 4,651 0 0 0.0
2006 Q2 4,881 5 2 1024.4
2006 Q1 3,536 0 0 0.0
2005 Q4 3,550 4 1 1126.8
2005 Q3 4,537 0 0 0.0
2005 Q2 4,617 1 0 216.6
2005 Q1 3,949 0 0 0.0
2004 Q4 4,386 2 0 456.0
2004 Q3 4,611 1 0 216.9
2004 Q2 3,884 2 1 514.9
2004 Q1 4,377 0 0 0.0
2003 Q4 5,161 1 1 193.8
2003 Q3 5,417 6 2 1107.6
2003 Q2 5,411 0 0 0.0
2003 Q1 5,577 3 1 537.9
2002 Q4 5,342 0 0 0.0
2002 Q3 6,096 2 0 328.1
2002 Q2 6,678 6 4 898.5
2002 Q1 6,424 0 0 0.0
2001 Q4 6,190 0 0 0.0
2001 Q3 6,399 1 0 156.3
2001 Q2 6,427 0 0 0.0
2001 Q1 5,787 0 0 0.0
2000 Q4 5,842 0 0 0.0
2000 Q3 6,602 0 0 0.0
2000 Q2 6,524 0 0 0.0
2000 Q1 6,145 19 4 3091.9

Fatalities at this mine

3 recorded
December 27, 1991 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver Fatality · POWERED HAULAGE
Sierra Rock Products · Caught in, under or between a moving and a stationary object

THE VICTIM WAS OWNER/OPERATOR OF A TEN-WHEEL PETERBUILT GRAVEL TRUCK. HE REGULARLY HAULED FINISHED PRODUCT FROM THE STOCKPILE AT THIS PROPERTY TO CUSTOMERS LOCATED ON THE WESTERN SLOPE OF THE SIERRA NEVADA MOUNTAINS. THE MORNING OF THE ACCIDENT, THE VICTIM STOPPED HIS TRUCK ABOUT 20' FROM THE END OF THE SCALE WHERE THE LOAD WAS TO BE WEIGHED. A DOUBLE TRAILER WAS PARKED ON THE SCAL

February 23, 1991 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator Fatality · IGNITION OR EXPLOSION OF GAS OR DUST
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

EMPL & FOREMAN HAD BEEN WELDING ADDITIONAL FITTINGS ON PRTABLE FUEL TANKS. TANKS HAD BEEN FILLED WITH WATER DURING WELDING OPERATION. AFTER FINISHING WLEDING TANKS WERE BEING DRAINED & FOREMAN WALKED INTO SHOP TO WORK ON HOSES. FOR SOME REASON UNKNOWN TO US EMPL CLIMBED IN BETWEEN FUEL TANKS & EXPLOSION OCCURED CAUSING INSTAND DEATH. CAUSE OF IGNITION IS UNKNOWN.

March 10, 1984 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · MACHINERY
Sierra Rock Products · Caught in, under or between two or more moving objects

#1 DECEASED FAILED TO FOLLOW STANDARD LOCK OUT PROCEDURE #2 WARNING HORN NOT OPERABLE #3 OPERATOR FAILED TO CLEAR ALL MACHINES BEFORE STARING PLANT. CRUSHED BETWEEN ROLLS FROM FEET TO CHEST.

Reportable incidents

25 on file (excluding fatalities above)

1995 · 1 incident

November 15, 1995 CA · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Sierra Rock Products · Fall from machine

REPAIRING LOADER. SLIPPED AND FELL. GRABBEC CHAIN TO CATCH HIMSELF AND CAUGHT FINGER ON HOOK AT END OF CHAIN.

1993 · 1 incident

April 1, 1993 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Sierra Rock Products · Struck by flying object

WORKER WAS BREKING AN OC\VERSIZE ROCK WITH A SLEDGEHAMMER ROCK CHIP STRUCK RT EYE DAMAGE WAS A SLIGHT SCRATCH ON EYE BALL NO LASTING DAMAGE GLASSES ARE PROVIDED & THIS EMPLOYEE ALWASYS WEARS T HEM EMPLOYEE COULD NOT EXPLAIN WHY HE DID NOT HAVE THEM ON THIS TIME

1990 · 1 incident

January 6, 1990 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Sierra Rock Products · Struck by falling object

UNLOADING STEEL & A PIECE OF STEEL <HEEL PLATE| FELL ON LEFT BIG TOE THEY WERE UNLOADING 10 SMALL PIECES OF STEEL BY HAND & 1 PIECE SLIPPOED OUT OF I NAME HAND & FELL ON HIS TOE

1988 · 6 incidents

December 7, 1988 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

USING A SLEDGE HAMMER TO BREAK A ROCK LODGED IN CRUSHER; SLEDGE HAMMER STRUCK THE SIDE OF THE ROCK CAUSING THE HAMMER TO S TRIKE FOOT.

August 10, 1988 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Sierra Rock Products · Struck against stationary object

WORKING ON A MOTOR ON THE PLANT, WHEN CLIMBING DOWN HE CAUGHT HIS RING ON A SHAKER SCREEN AND CUT HIS FINGER BADLY.

April 20, 1988 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

SIDE DOOR CAME UNLATCHED,HAND WAS HIT.

February 4, 1988 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

CARRYING PIECE 2F STEEL, WHICH SLIPPED IN HAND. BURR CUT AND PUNCTURED PALM OF RIGHT HAND.

January 25, 1988 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Sierra Rock Products · Caught in, under or between a moving and a stationary object

I NAME AND I NA4E WERE REPLACING SHAKER SCREEN IN TO FRAME WORK, SCREEN SLIPPED INTO FRAME TO FAST FOR I NAME TO REMOVE HIS FINGER COMPLETELY. THE FINGER WAS CUT OPEN BY THE S CREEN. I NAME A ADMINISTERED FI9ST AID AND RETURNED TO W ORK. LATER IN WEK FINGER BECAME INFECTED

January 6, 1988 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Sierra Rock Products · Struck by falling object

EMPLOYEE WAS PI7KING UP METAL PLATE LOST HIS FOOTING AND DROPPED THE PLATE ON HIS

1987 · 5 incidents

June 10, 1987 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

I NAME STRUCK A3ROCK WITH THE SLEDGE HAMMER AND IT BOUNCED OFF OF THE ROCK AND HHIT THE SIDE OF HIS RIGHT FOOT, BREAKING TWO BONES.

May 17, 1987 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Sierra Rock Products · Caught in, under or between a moving and a stationary object

EMP WAS PULLING3A HYD. PUMP ON A LOADER - THE PUMP SLIPPED AND SMASHED HIS FINGER

February 25, 1987 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Sierra Rock Products · Over-exertion in lifting objects

I NAME HE WAS P3CKING UPO A LOADER AXEL WHEN HE FELT SOMETHING GIVE IN HIS BACK AFTER THAT HE COULD NOT LIFT ANYTHING HEAVY.

January 30, 1987 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Sierra Rock Products · Struck by falling object

EMPLOYEE WAS BR9AKING LARGE BOULDER IN JAWS OF CRUSHER WHEN ROCK FELL FROM FEEDER CHAIN ONTO RT FOOT

January 10, 1987 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Sierra Rock Products · Struck by flying object

I.NAME BRIEFLY 9EMOVED HIS WELDING HELMET TO CHANGE THE WELDING ROD & A SMALL PIECE OF WELDING SLAG FLEW INTO HIS RIGHT EYE

1986 · 9 incidents

November 13, 1986 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Sierra Rock Products · Struck by flying object

WEDGE SHOT OUT 2F BIG JAW AND STRUCK I.NAME IN THE LEFT CHEEK CUT HIS CHEEK AND FRACTURED JAW BONE

November 12, 1986 CA · Metal/Non-Metal rock driller MACHINERY
Sierra Rock Products · Struck against stationary object

I.NAME RAN INTO3A STEEL BEAM RESULTED IN A CONCUSHION AND 2 CUTS TO THE FOREHEAD

November 6, 1986 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Sierra Rock Products · Over-exertion (Not Elsewhere Classified)

I.NAME CLIMBING3UP SMALL BANK SLIPPED AND STARTED TO FALL.WHEN CAUGHT HIMSELF HE STRAINED AND TWISTED LOWER BACK.PULLED MUSCLE BESIDE SPINE.

June 11, 1986 CA · Metal/Non-Metal HANDTOOLS (NONPOWERED)
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

WHILE PUTTING A3WHEEL ON THE SHAFT OF THE ROLLS I.NAME WAS HOLDING THE WHEEL A PIECE OF STEEL WHICH I.NAME WAS HITTING WITH A SLEDGE HAMMER I.NAME SMASHED I.NAME HAND

April 29, 1986 CA · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Sierra Rock Products · Struck by falling object

I.NAME PRESSING3LARGE PULLEY OFF ROLLS SHAFT WITH JACK AND NEGLECTED TO TIE BACK PULLEY WHEN IT POPPED OFF AND FELL ON HIM.

April 28, 1986 CA · Metal/Non-Metal drill operator MACHINERY
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

ON AIR TRACK WA7ER LINE HOSE BLEW OFF AND HOSE HIT BEHIND RIGHT EAR.

March 31, 1986 CA · Metal/Non-Metal drill operator SLIP OR FALL OF PERSON
Sierra Rock Products · Fall onto or against objects

I.NAME WALKING 7HROUGH MECHANICS SHOP WHEN SLIPPED ON OIL AND HIT WELDING BENCH FACE-FIRST WHICH KNOCKED OUT 2 FRONT TEETH.

February 28, 1986 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Sierra Rock Products · Over-exertion in lifting objects

CLEANING OUT SH2P AND PICKED UP SEVERAL 10'LONG BOARDS LAMINATED TOGETHER.

1985 · 2 incidents

November 6, 1985 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Sierra Rock Products · Caught in, under or between a moving and a stationary object

TIGHTENING BELT8 AND CAUGHT FINGERS.RIGHT INDEX FINGER SMASHED.

September 16, 1985 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Sierra Rock Products · Struck by... (Not Elsewhere Classified)

EMPL ROLLING CA3T OVER,CANT HOOK SLIPPED AND HIT HIM-HEAD.THIS HAPPENED AT THE SAW MILL.

For insurers, brokers, and safety consultants

The full compliance file on SIERRA ROCK PRODUCTS

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.