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SWA @ Mountain Gate Quarry: 218 MSHA citations Metal/Non-Metal

Controlled by Corkey Harmon
REDDING, Shasta County, CA  ·  Active
MSHA Mine ID: 0405504

SWA @ Mountain Gate Quarry has $45K in proposed MSHA penalties and $0 outstanding across 14 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
12
Years on record
2001–2025
Latest incident
Mar 2025
Compliance record
MSHA citations since 2002
218
citations
33
significant & substantial
$45,222
proposed penalties
$36,598
paid to date
81% of proposed penalties paid to date, a $8,624 gap.
Source: MSHA violations data, updated weekly.
See Stimpel Wiebelhaus Associates, Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2002
70
inspections on record
1,446
inspection hours
15.1
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.
218 citations across 1,446 inspection hours.
Source: MSHA inspections data, updated weekly.

SWA @ Mountain Gate Quarry has $45K in proposed MSHA penalties and $0 outstanding across 14 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.
$45K
proposed penalties
$37K
current assessed
$37K
paid to date
$0
outstanding
217 assessments are final orders; 14 contested dockets.
Of $22K in penalties contested before the Commission, $13K was upheld in final decisions.
As of the most recent assessment on 2025-11-03.
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.
15.1%
significant & substantial
3.7%
high negligence or reckless
16.1%
reasonably likely or greater
50.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.5% none, 19.3% low, 76.6% moderate, 3.7% high, 0.0% reckless.
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.
40 citations taken to the federal commission · 18% of citations on record
  • Settled 24 · 60%
  • Stood as issued 14 · 35%
  • Vacated or withdrawn 2 · 5%
59%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 17 decided S&S contests · industry: 79%
36%
Penalty reduction in decided contests
$10K proposed, $6K 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 2013-08-28.
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.
Docket Decision Judge Year Proposed / upheld
WEST20030123M Settlement Weisberger 2003 $12K → $6K
WEST 2013-396M Settlement Bulluck 2013 $4K → $2K
WEST 2008-315M Settlement Bulluck 2008 $1K → $719
WEST 2010-1703M Dismissal Manning 2012 $1K → $634
WEST 2005-369M Settlement Feldman 2005 $963 → $628
WEST 2013-1098M Settlement Manning 2014 $946 → $850
Source: FMSHRC civil penalty dockets and decisions (public record), 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: 2025-04-10
0%
of limit-tested samples over the exposure limit
18
samples
2
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg9
  • Quartz, respirable, >1% Qtz5
  • Unlisted Particulate, respirable, <1% Qtz4
Show the individual readings (18)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-04-10 Quartz, respirable, >1% Qtz 0.33 Laborer, Bullgang
2022-11-17 Quartz, respirable, >1% Qtz 0.36 Building Repair/Maint.
2022-11-17 Respirable dust, <.1mg 0 Building Repair/Maint.
2020-10-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-10-27 Respirable dust, <.1mg 0 Mechanic
2020-10-27 Respirable dust, <.1mg 0 Mechanic
2019-08-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2019-08-06 Quartz, respirable, >1% Qtz 0.23 Drill Helper
2017-06-07 Respirable dust, <.1mg 0 Laborer, Bullgang
2017-06-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-04-15 Quartz, respirable, >1% Qtz 0.24 1.65 0.15 Laborer, Bullgang
2015-04-15 Quartz, respirable, >1% Qtz 0.67 1.34 0.50 Crusher Oper/Worker
2013-06-07 Respirable dust, <.1mg 0 Mechanic
2013-06-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2005-02-01 Unlisted Particulate, respirable, <1% Qtz 0.99 Drill Helper
2005-02-01 Unlisted Particulate, respirable, <1% Qtz 0.13 Crusher Oper/Worker
2003-11-19 Unlisted Particulate, respirable, <1% Qtz 0.18 Crusher Oper/Worker
2003-11-19 Unlisted Particulate, respirable, <1% Qtz 0.12 Electrician
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.

SWA @ Mountain Gate Quarry recorded 9.91 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
ⓘ 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.
9.91
total case rate
0.00
days-away rate
0.000
fatality rate
Above average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.43 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
2025 * 9.91 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2007 * 8.58 0.00 0.000
2006 * 6.92 0.00 0.000
2005 * 44.20 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.
Ownership history
  1. Stimpel Wiebelhaus Associates 2001 to 2007
  2. Stimpel Wiebelhaus Associates, Inc. 2007 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 9
2025 12
2024 20
2023 10
2022 11
2021 10
2020 11
2019 11
2018 10
2017 12
2016 10
2015 11
2014 11
2013 12
2012 12
2011 9
2010 6
2009 7
2008 9
2007 13
2006 16
2005 13
2004 12
2003 14
2002 19
2001 12
Source: MSHA quarterly employment and production, updated weekly.

SWA @ Mountain Gate Quarry sits in Shasta 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.
Shasta County, California · Population 181,554
0.1%
Mining share of county employment
$71,931
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 3,944 0 0 0.0
2026 Q1 3,342 0 0 0.0
2025 Q4 4,021 4 0 994.8
2025 Q3 5,156 0 0 0.0
2025 Q2 6,008 2 0 332.9
2025 Q1 4,994 0 0 0.0
2024 Q4 5,222 1 0 191.5
2024 Q3 5,492 0 0 0.0
Show 91 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 5,968 1 0 167.6
2024 Q1 4,682 0 0 0.0
2023 Q4 5,582 0 0 0.0
2023 Q3 5,410 2 0 369.7
2023 Q2 5,844 0 0 0.0
2023 Q1 4,144 0 0 0.0
2022 Q4 4,580 2 0 436.7
2022 Q3 5,852 6 1 1025.3
2022 Q2 5,116 0 0 0.0
2022 Q1 5,061 5 0 987.9
2021 Q4 4,885 0 0 0.0
2021 Q3 4,070 2 0 491.4
2021 Q2 4,559 0 0 0.0
2021 Q1 4,341 0 0 0.0
2020 Q4 5,547 1 0 180.3
2020 Q3 5,467 0 0 0.0
2020 Q2 5,474 0 0 0.0
2020 Q1 4,941 0 0 0.0
2019 Q4 5,248 6 0 1143.3
2019 Q3 4,387 2 0 455.9
2019 Q2 4,616 2 0 433.3
2019 Q1 4,229 2 0 472.9
2018 Q4 4,760 0 0 0.0
2018 Q3 4,891 3 1 613.4
2018 Q2 4,035 0 0 0.0
2018 Q1 4,153 0 0 0.0
2017 Q4 4,408 4 1 907.4
2017 Q3 5,089 0 0 0.0
2017 Q2 6,224 3 0 482.0
2017 Q1 3,475 0 0 0.0
2016 Q4 3,660 3 0 819.7
2016 Q3 4,132 6 0 1452.1
2016 Q2 4,228 0 0 0.0
2016 Q1 2,525 14 1 5544.6
2015 Q4 3,059 0 0 0.0
2015 Q3 3,234 0 0 0.0
2015 Q2 4,124 8 1 1939.9
2015 Q1 4,395 2 0 455.1
2014 Q4 3,770 0 0 0.0
2014 Q3 3,697 0 0 0.0
2014 Q2 3,796 0 0 0.0
2014 Q1 3,707 13 1 3506.9
2013 Q4 2,642 0 0 0.0
2013 Q3 2,883 3 1 1040.6
2013 Q2 4,026 2 1 496.8
2013 Q1 3,506 0 0 0.0
2012 Q4 6,340 4 2 630.9
2012 Q3 6,746 0 0 0.0
2012 Q2 2,720 2 1 735.3
2012 Q1 1,855 3 0 1617.3
2011 Q4 1,789 0 0 0.0
2011 Q3 2,757 0 0 0.0
2011 Q2 3,698 0 0 0.0
2011 Q1 1,803 2 0 1109.3
2010 Q4 1,921 0 0 0.0
2010 Q3 2,023 0 0 0.0
2010 Q2 2,801 12 4 4284.2
2010 Q1 1,677 5 0 2981.5
2009 Q4 2,648 0 0 0.0
2009 Q3 2,534 0 0 0.0
2009 Q2 3,017 1 0 331.5
2009 Q1 2,346 1 0 426.3
2008 Q4 3,319 0 0 0.0
2008 Q3 3,778 0 0 0.0
2008 Q2 2,842 3 1 1055.6
2008 Q1 5,495 5 0 909.9
2007 Q4 5,488 0 0 0.0
2007 Q3 5,053 0 0 0.0
2007 Q2 6,816 3 0 440.1
2007 Q1 5,950 3 1 504.2
2006 Q4 7,183 0 0 0.0
2006 Q3 7,141 8 0 1120.3
2006 Q2 7,732 0 0 0.0
2006 Q1 6,841 9 1 1315.6
2005 Q4 7,732 0 0 0.0
2005 Q3 7,750 0 0 0.0
2005 Q2 6,883 4 1 581.1
2005 Q1 4,786 18 5 3761.0
2004 Q4 6,488 0 0 0.0
2004 Q3 6,052 5 1 826.2
2004 Q2 6,165 0 0 0.0
2004 Q1 5,168 0 0 0.0
2003 Q4 6,839 2 0 292.4
2003 Q3 7,229 0 0 0.0
2003 Q2 8,228 0 0 0.0
2003 Q1 7,056 6 1 850.3
2002 Q4 7,513 0 0 0.0
2002 Q3 9,332 4 0 428.6
2002 Q2 9,941 0 0 0.0
2002 Q1 8,412 12 5 1426.5
2001 Q4 4,825 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

12 on file

2025 · 1 incident

March 3, 2025 CA · Metal/Non-Metal plumber, pipefitter, millwright MACHINERY
Stimpel Wiebelhaus Associates, Inc. · Struck by... (Not Elsewhere Classified)

Miner was drilling a hole through some rubber flashing. Miner was operating the hand drill with left hand while supporting the section of flashing material from the back side with right hand. When the drill bit cut through it contacted the palm of the miner's right hand causing a laceration resulting in 6 stitches, antibiotics, and Tetanus shot. Restricted duty for 7-14 days.

2007 · 1 incident

November 5, 2007 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Stimpel Wiebelhaus Associates · Struck by... (Not Elsewhere Classified)

Needed to move 50#-3/8" steel plates. Plates adjacent cut the back of the base of right thumb. Required 4 stitches, but was able to return to full duty.

2006 · 1 incident

September 9, 2006 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Stimpel Wiebelhaus Associates · Over-exertion (Not Elsewhere Classified)

After pouring anfo into a drillhole from a 50# bag, EE had trouble standing up. He has had trouble in the past and did not report the incident until 9/22/06.

2005 · 6 incidents

September 19, 2005 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Stimpel Wiebelhaus Associates · Over-exertion (Not Elsewhere Classified)

Loader operator reaching for radio microphone & pulled muscle in shoulder.

June 29, 2005 CA · Metal/Non-Metal pumper HANDTOOLS (NONPOWERED)
Stimpel Wiebelhaus Associates · Caught in, under or between a moving and a stationary object

EE WAS TRYING TO DISLODGE ROCKS AT TUNNEL FEED WITH PRY BAR. WHILE USING FORCE ON BAR, HIS FINGER SLIPPED AND BECAME CAUGHT BETWEEN BAR AND METAL RAIL.

May 20, 2005 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Stimpel Wiebelhaus Associates · Struck against a moving object

EMPLOYEE CLAIMED HE HURT HIS BACK SEVERAL DAYS PRIOR TO REPORT DATE (5/26/06) AND ASSUMED IT WAS FROM BOUNCING IN THE LOADER. WORK RELATED INJURY IS UNCERTAIN. INJURY RESULTED IN MODIFIED DUTY FOR 2 WEEKS, NO LOST TIME

May 6, 2005 CA · Metal/Non-Metal weighman, scale person ALL OTHER OCCUPATIONAL ILLNESSES
Stimpel Wiebelhaus Associates · (Not Elsewhere Classified)

Soreness in neck & right arm -accumulation over several months. Per miner - not sure how it happened or if job related.

February 10, 2005 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Stimpel Wiebelhaus Associates · Absorption of radiations, caustics, toxic and noxious substances

EE WAS CHECKING FLASHING AT LIME PLANT AND DISTURBED SETTLED DUST. DUST IN EYE CAUSED INFECTION - DIAGNOSIS: LEFT EYE CONJUNCTIVITIS. DELAY IN REPORTING DUE TO DOCTOR'S INVESTIGATION WHETHER INDUSTRIAL.

February 2, 2005 CA · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management MACHINERY
Stimpel Wiebelhaus Associates · Struck by flying object

Using impact wrench attached to air hose, removing nuts to repair crusher. Nozzle came loose from hose, miner raised arm in defensive move. Pressurized air lacerated arm. 4 stitches required. No lost time. restrictions include keeping wound clean and dry.

2003 · 1 incident

November 4, 2003 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Stimpel Wiebelhaus Associates · Struck by flying object

MINER ATTEMPTING TO DISLODGE ROCK STUCK IN DOZER BLADE USING CRANE FROM BOOM TRUCK. TOO MUCH STRESS ON ROCK CAUSING IT TO FRACTURE. PIECES OF ROCK FLEW OUT HITTING MINER ON FOREHEAD. MINER WAS NOT WEARING HARD HAT.

2002 · 1 incident

March 1, 2002 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Stimpel Wiebelhaus Associates · Caught in, under or between (Not Elsewhere Classified)

MECHANIC NOTICED GUARD MISSING AT TAIL PULLEY & ASKED LABORER TO STANDBY WHILE MECHANIC RETRIEVED TOOLTRUCK & WELDER; LABORER BEGAN SHOVELING ROCK FROM BENEATH CONVEYOR, CAUGHT SLEEVE ON MET AL VIBRATORS & VIBRATORS CAUSED SEVERE ABRASIONSON LT. SIDE OF CHEST & UPPER LT. ARM.

2001 · 1 incident