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: 877 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Patterson Plant has $85K in proposed MSHA penalties and $0 outstanding across 1 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.
$85K
proposed penalties
$84K
current assessed
$84K
paid to date
$0
outstanding
205 assessments are final orders; 1 contested dockets.
Of $3K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2019-12-18.
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.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘContesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
5citations taken to the federal commission · 2% of citations on record
Settled
5 · 100%
23%
Penalty reduction in decided contests
$3K proposed, $2K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2009-07-08.
Contested penalties
ⓘA reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
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: 2016-02-17, 10 years ago
0%
of limit-tested samples over the exposure limit
29
samples
13
limit-tested
Most sampled contaminants
Respirable dust, <.1mg15
Quartz, respirable, >1% Qtz13
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (29)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2016-02-17
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2016-02-17
Respirable dust, <.1mg
0
Front-end Loader Operator
2013-08-08
Respirable dust, <.1mg
0
Supervisor, Co. Official
2013-08-08
Quartz, respirable, >1% Qtz
0.12
1.04
0.12
Front-end Loader Operator
2009-04-22
Quartz, respirable, >1% Qtz
0.63
1.88
0.34
Laborer, Bullgang
2009-04-22
Quartz, respirable, >1% Qtz
0.15
1.65
0.09
Front-end Loader Operator
2009-04-22
Respirable dust, <.1mg
0
Truck Driver
2009-04-22
Quartz, respirable, >1% Qtz
1.71
3.1
0.55
Crusher Oper/Worker
2006-04-11
Respirable dust, <.1mg
0
Washer Operator
2005-05-12
Respirable dust, <.1mg
0
Washer Operator
2005-05-12
Respirable dust, <.1mg
0
Cleanup Man
2005-05-12
Quartz, respirable, >1% Qtz
0.23
1.13
0.20
Crusher Oper/Worker
2005-05-12
Unlisted Particulate, respirable, <1% Qtz
0.13
Mechanic
2005-05-12
Quartz, respirable, >1% Qtz
1.25
1.28
0.98
Mechanic
2003-02-20
Respirable dust, <.1mg
0
Crusher Oper/Worker
2003-02-20
Respirable dust, <.1mg
0
Laborer, Bullgang
2003-02-20
Quartz, respirable, >1% Qtz
0.24
0.87
0.28
Mechanic
2003-02-20
Quartz, respirable, >1% Qtz
0.39
0.91
0.43
Laborer, Bullgang
2003-02-20
Quartz, respirable, >1% Qtz
0.25
2.02
0.12
Laborer, Bullgang
2002-04-04
Respirable dust, <.1mg
0
Truck Driver
2002-04-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2002-04-04
Quartz, respirable, >1% Qtz
0.13
0.92
0.14
Laborer, Bullgang
2002-04-04
Quartz, respirable, >1% Qtz
0.17
0.68
0.25
Crusher Oper/Worker
2002-04-04
Respirable dust, <.1mg
0
Washer Operator
2001-05-02
Respirable dust, <.1mg
0
Front-end Loader Operator
2001-05-02
Respirable dust, <.1mg
0
Crusher Oper/Worker
2001-05-02
Respirable dust, <.1mg
0
Laborer, Bullgang
2001-05-02
Quartz, respirable, >1% Qtz
0.13
1.09
0.12
Truck Driver
2001-05-02
Quartz, respirable, >1% Qtz
0.17
0.77
0.22
Shovel Operator
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.
Patterson Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2015.
Injury rate, 2015
ⓘThis rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 2.26 and the all-US-mining average was 2.72 cases per 100 workers.
In California, metal and nonmetal mining averaged 2.21 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year
total case rate
days-away
fatal
2015 *
0.00
0.00
0.000
2014 *
0.00
0.00
0.000
2008 *
0.00
0.00
0.000
2007 *
0.00
0.00
0.000
2006 *
3.07
3.07
0.000
2005 *
11.90
0.00
0.000
2004 *
13.20
5.28
0.000
2003 *
15.63
0.00
0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2020
4
2019
5
2018
7
2017
10
2016
8
2015
8
2014
8
2013
6
2009
7
2008
12
2007
21
2006
26
2005
28
2004
30
2003
32
2002
33
2001
38
2000
40
Source: MSHA quarterly employment and production, updated weekly.
Patterson Plant sits in Placer 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.
Placer County, California · Population 412,435
0.1%
Mining share of county employment
$114,678
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
2020 Q1
1,439
0
0
0.0
2019 Q4
2,851
5
1
1753.8
2019 Q3
2,795
0
0
0.0
2019 Q2
2,668
3
0
1124.4
2019 Q1
2,443
2
0
818.7
2018 Q4
976
0
0
0.0
2018 Q3
3,778
0
0
0.0
2018 Q2
4,133
6
1
1451.7
Show 57 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2018 Q1
4,514
1
1
221.5
2017 Q3
5,559
0
0
0.0
2017 Q2
5,676
4
2
704.7
2017 Q1
3,511
0
0
0.0
2016 Q4
5,493
4
1
728.2
2016 Q3
5,621
0
0
0.0
2016 Q2
3,829
4
1
1044.7
2016 Q1
3,695
1
0
270.6
2015 Q4
5,396
0
0
0.0
2015 Q3
4,032
0
0
0.0
2015 Q2
5,376
1
0
186.0
2015 Q1
5,995
0
0
0.0
2014 Q4
5,654
0
0
0.0
2014 Q3
6,312
0
0
0.0
2014 Q2
3,461
0
0
0.0
2014 Q1
4,613
2
1
433.6
2013 Q4
5,402
0
0
0.0
2013 Q3
4,204
1
0
237.9
2013 Q2
2,913
0
0
0.0
2009 Q2
3,216
10
1
3109.5
2009 Q1
3,336
0
0
0.0
2008 Q4
3,970
5
0
1259.4
2008 Q3
5,268
0
0
0.0
2008 Q2
5,662
4
1
706.5
2008 Q1
8,868
3
1
338.3
2007 Q4
9,796
0
0
0.0
2007 Q3
10,221
0
0
0.0
2007 Q2
10,288
9
2
874.8
2007 Q1
11,750
0
0
0.0
2006 Q4
16,219
9
4
554.9
2006 Q3
16,719
0
0
0.0
2006 Q2
18,025
12
3
665.7
2006 Q1
14,149
8
3
565.4
2005 Q4
16,003
0
0
0.0
2005 Q3
14,322
0
0
0.0
2005 Q2
18,115
13
6
717.6
2005 Q1
18,812
0
0
0.0
2004 Q4
18,267
16
5
875.9
2004 Q3
20,940
0
0
0.0
2004 Q2
21,545
7
2
324.9
2004 Q1
15,017
0
0
0.0
2003 Q4
14,322
8
2
558.6
2003 Q3
15,517
0
0
0.0
2003 Q2
17,224
0
0
0.0
2003 Q1
16,910
16
12
946.2
2002 Q4
15,110
0
0
0.0
2002 Q3
17,831
0
0
0.0
2002 Q2
17,203
0
0
0.0
2002 Q1
17,187
0
0
0.0
2001 Q4
18,504
13
4
702.6
2001 Q3
19,370
0
0
0.0
2001 Q2
20,037
15
8
748.6
2001 Q1
19,182
0
0
0.0
2000 Q4
18,227
6
3
329.2
2000 Q3
27,061
1
0
37.0
2000 Q2
31,157
4
0
128.4
2000 Q1
28,387
0
0
0.0
Fatalities at this mine
1 recorded
June 1, 1987CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorFatality · MACHINERY
HOIST PUMP & PO3TON PLATFORM OUT OF WATER WITH DRAGLINE I.NAME WAS STANDING ON PLAT FORM AS H OISTING IT UP 3 EYES WELDED ON PLATFORM BROKE LOOSE & IT TILTED THE PLATFORM & I.NAME FELL OFF BA CKWARDS HE STRU7K CONCRETE HEDAD FIRST.
Reportable incidents
100 on file (excluding fatalities above)
2016 · 1 incident
November 26, 2016CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techMACHINERY
EE was grinding and had safety glasses on but metal fragment got into left eye. EE began having irritation and reported. EE was taken to clinic for treatment.
2006 · 1 incident
April 1, 2006CA · Metal/Non-Metaloutside foreman, leadmanMACHINERY
Employee was walking on a spray bar JCI screen. His foot slipped from under him, and the employee fell backwards, landing on his lower back on the spray bar.
2004 · 5 incidents
October 5, 2004CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)
Employee was cleaning chutes above the base transfer conveyor. The water hose was slipping and employee tried to hold on to it. It jerked the employees shoulder which cause him back pain.
July 10, 2004CA · Metal/Non-Metalwater truck operatorPOWERED HAULAGE
EMPLOYEE WAS WORKING WITH A HOSE ON THE WATER TRUCK. EMPLOYEE'S LOWER BACK BEGAN TO HURT AND DID NOT GET ANY BETTER.
June 7, 2004CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPLOYEE LOST HIS FOOTING WHILE COMING DOWN THE STAIRS OF THE WASH GRAVEL PLANT.
January 16, 2004CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EE WAS TRYING TO FREE A CABLE THAT WAS UNDER CONVEYOR BELT, IT BROKE FREE HITTING EE IN THE MOUTH.
October 17, 2003CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EMPLOYEE WAS LIFTING & CARRYING A 10 HORSEPOWER MOTOR THAT WEIGHED APPROX. 90 LBS. HE FELT PAIN IN HIS LOWER BACK. EMPLOYEE DIDN'T NOTIFY ANYONE UNTIL 11/3.
EE WAS USING A SHOVEL AT THE BASE STACKER. HE FELT THAT HIS BACK WAS HURTING HIM A LITTLE AND HE WAS SORE. WHEN HE TRIED TO GET UP THE NEXT MORNING, HE COULD HARDLY MOVE.
February 1, 1999CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
EE HAD HOOKED UP A NEW DRIVE MOTOR WHEN HE NOTICED THE THE MOTOR WAS TURNING BACKWARDS. THE EE SHUT OFF THE MOTOR IN THE FUSE BOX TO SWITH THE NEUTRAL LEGS SO THE MOTOR WOULD RUN FORWARDS. INS TEAD OF WORKING WITH THE NEUTRAL LEGS, HE TOUCHED THE ENERGIZED LEGS WHICH RESULTED IN AN ELECTRICAL FIRE/FLASH.
1997 · 4 incidents
October 22, 1997CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
EE WAS HOLDING A DRIFT BAR WHILE ANOTHER EE WAS HITTING THE BAR WITHA 16 LB HAMMER. THE EE WHO WAS USING THE HAMMER MISSED HITTING EE IN THE UPPER RT LEG.
EMPLOYEE WAS STARTING TO SERVICE A TRUCK IN SNHOP. HE REACHED OVER HTE FRAME TO GRAB THE DIV E LINE AND HURT HIS LEFT SIDE. WENT TO URGENT CARE CLINIC BECAUSE IT WAS NOT GETTING ANY BETTER. EMPLOYEE REPORT INJURY ON 6/13. HE THOUGHT THAT HE WOULD GET BETTER, AND WHEN IT DID NOT, HE CAME TO ME.
April 25, 1995CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
EE WAS INSTALING A DRIVE LINE IN A LOADER. THE WHEELS WERE BEING LOWERED BY THE BUCKET, & HIS L KNEE GOT UNDER THE CENTER PIN OF LOADER. HE JERKED TO GET FROM UNDER IT & HE HURT HIS BACK.
March 9, 1995CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorDISORDERS (REPEATED TRAUMA)
I AM ENCLOSING A WORKMAN COMP REPORT FOR ONE OF OUR EE THAT CLAIM THAT HIS BACK PROBLEM IS DUE TO WORKING ON OUR PLANT. WE FEEL THAT IT IS NOT A WORKMANS COMP INJURY, BUT HE HAVE TO FILE A REP ORT ANYWAY. I WAS NOT SURE IF I NEED TO SEND A REPORT TO YOU, SO I FIGURED I BETTER JUST IN CASE. KEEP IN MIND, THE EE DID NOT REPORT ANY INJURY WITH SUPERVISOR.
January 18, 1995CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
EMPLOYEE LAID DOWN ON A COUPLE OF BOXES OF ROOF THAT WERE IN THE STORAGE ROOM PLANT MANAGER CHECK ON HIM THEN REALIZED SOMETHING WAS NOT RT WITH EMPLOYEE
July 30, 1994CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)
EMPLOYEE WAS DRIVING HIS SCRAPER HE GOT STUNG BY A BEE EMPLOYEE WAS HAVING A REACTION TO THE STING
1992 · 2 incidents
June 30, 1992CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
EMPLOYEE WAS AT PETERSON TRACTOR WORKING ON ONE OF OUR PIECES OF EQUIPMENT E SMASHED HIS HAND & WHEN HE STOOD UP HE BLACKED OUT HE FELL AT THE PIECE OF THE EQUIPMENT ONTO THE WORK TABLE & ONTO THE FLOOR
July 8, 1991CA · Metal/Non-Metalwelder (shop)MACHINERY
EMPLOYEE HAD BROUGHT HIS EXCAVATOR INTO THE SHOP TO GREASE IT AND PREPARE IT FOR THE NEXT DAY'S WORK. HE WAS GREASING THE BOTTOM OF THE EXCAVATOR WHEN HE STOOD UP AND WAS TURNING AROUND AND HE TWISTED HIS BACK.
February 19, 1990CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
EMPLOYEE WAS ON TOP OF THE VIBRATING GRIZZLEY WHEN A ROCK FELL OFF THE BELT & SMASHED <R| INDEX FINGER AGAINST ANOTHER ROCK
November 17, 1989CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS IN A BIG TANK ON OUR SAND PLANT ABOUT 700 AN WHEN HE SLIPPED & WHEN HE DID HIS RT LEG WENT ONE WAY & HIS BODY WENT ANOTHER IN RETURN HE TWISTED HIS R LEG & HURT HIS R KNEE
EMPLOYEE WAS OPERATING A LOADER WHEN HE STARTED ACTING STRANGE-SOON AFTER HE HIT THE OFFICE WITH THE FRONT END LOADER-WE BELIEVE HE HAD A DIABETIC REACTION WHILE DRIVING EQUIPMENT.
October 4, 1989CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
EMPLOYEE WAS STANDING NEXT TO SOME OTHER EMPLOYEES DEFROST A HOSE THE HOSE THAT THEY WERE DEFROSTING CAME APART AND FLEWUP AND HIT INJURED EMPLOYEE IN THE FACE
EMPLOYEE WAS WORKING ON A PIPE ON THE DREDGE. THE LINING OF THIS PIPE CAME OUT. WITHIN THIS LINING A PIECE OF WIRE POKED THROUGH AND THIS POKED EMPLOYEE IN THE LEFT THUMB.
October 14, 1988CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EMPLOYEE WAS WALKING BY A AREA THAT ANOTHER EMPLOYEE WAS WORKING WITH THE AIR DRILL GUN L& PART OF THE BONE OF THE GUN FLEW OFF & HIT EMPLOYEE IN THE RT.EYE
August 16, 1988CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)
EMPLOYEE WAS WORKING WITH SCREW ON THE SAND PLANT. SAND FELL FROM THE SCREW AND INTO EMPLOYEE'S EYE.
June 1, 1988CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON