Quarry Stone · Struck by... (Not Elsewhere Classified)
EE was hammering in a wedge to remove a pin, he stopped to see if it had moved, and the wedge popped out striking him in the jaw.
China Hill (Volcano) Quarry: 78 MSHA citations Metal/Non-Metal
China Hill (Volcano) Quarry has $8K 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
- 1
- Years on record
- 2013
- Latest incident
- Feb 2013
Compliance record
MSHA citations since 2001
78
citations
17
significant & substantial
$7,788
proposed penalties
$7,788
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
45
inspections on record
525
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: 525 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
China Hill (Volcano) Quarry has $8K 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.$8K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
78 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2022-10-19.
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.21.8%
significant & substantial
3.8%
high negligence or reckless
21.8%
reasonably likely or greater
46.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 15.4% low, 80.8% moderate, 3.8% 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: 2021-04-14, 5 years ago
ⓘ
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.0%
of limit-tested samples over the exposure limit
8
samples
5
limit-tested
Most sampled contaminants
- Nuisance dust, respirable, <1% Qtz5
- Respirable dust, <.1mg3
Show the individual readings (8)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2021-04-14 | Respirable dust, <.1mg | 0 | Supervisor, Co. Official | ||
| 2009-06-24 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2009-06-24 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2002-11-26 | Nuisance dust, respirable, <1% Qtz | 0.44 | 10 | 0.04 | Crusher Oper/Worker |
| 2002-11-26 | Nuisance dust, respirable, <1% Qtz | 0.16 | 10 | 0.02 | Front-end Loader Operator |
| 2002-11-26 | Nuisance dust, respirable, <1% Qtz | 0.15 | 10 | 0.02 | Supervisor, Co. Official |
| 2002-11-26 | Nuisance dust, respirable, <1% Qtz | 0.58 | 10 | 0.06 | Truck Driver |
| 2002-11-26 | Nuisance dust, respirable, <1% Qtz | 0.17 | 10 | 0.02 | Front-end Loader 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.
Ownership history
- John W Dickson 1950 to 1993
- Kreth Inc 1993 to 2007
- Quarry Stone 2007 to 2014
- Kreth Inc. 2014 to 2020
- Golden State Crushing 2020 to 2024
- FHC California, LLC 2024 to 2025
- Folsom Ready-Mix, Inc. 2025 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2023 | 1 |
| 2022 | 2 |
| 2021 | 3 |
| 2020 | 0 |
| 2019 | 0 |
| 2018 | 0 |
| 2017 | 1 |
| 2016 | 2 |
| 2015 | 2 |
| 2013 | 2 |
| 2012 | 5 |
| 2011 | 4 |
| 2010 | 4 |
| 2009 | 4 |
| 2008 | 6 |
| 2007 | 5 |
| 2006 | 4 |
| 2005 | 6 |
| 2004 | 6 |
| 2003 | 6 |
| 2002 | 5 |
| 2001 | 6 |
| 2000 | 5 |
Source: MSHA quarterly employment and production, updated weekly.
China Hill (Volcano) Quarry sits in Amador County, California, where the Census mining category is 0.2% 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.Amador County, California · Population 41,029
0.2%
Mining share of county employment
$81,526
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 |
|---|---|---|---|---|
| 2023 Q4 | 107 | 0 | 0 | 0.0 |
| 2023 Q3 | 24 | 0 | 0 | 0.0 |
| 2023 Q2 | 24 | 0 | 0 | 0.0 |
| 2023 Q1 | 8 | 0 | 0 | 0.0 |
| 2022 Q4 | 637 | 5 | 0 | 7849.3 |
| 2022 Q3 | 1,116 | 1 | 0 | 896.1 |
| 2022 Q2 | 886 | 0 | 0 | 0.0 |
| 2022 Q1 | 920 | 0 | 0 | 0.0 |
Show 77 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2021 Q4 | 1,836 | 1 | 0 | 544.7 |
| 2021 Q3 | 2,002 | 0 | 0 | 0.0 |
| 2021 Q2 | 985 | 1 | 0 | 1015.2 |
| 2020 Q1 | 0 | 0 | 0 | |
| 2019 Q4 | 0 | 0 | 0 | |
| 2019 Q3 | 0 | 0 | 0 | |
| 2019 Q2 | 0 | 0 | 0 | |
| 2019 Q1 | 0 | 0 | 0 | |
| 2018 Q4 | 0 | 0 | 0 | |
| 2018 Q3 | 0 | 0 | 0 | |
| 2018 Q2 | 0 | 0 | 0 | |
| 2018 Q1 | 0 | 0 | 0 | |
| 2017 Q4 | 0 | 0 | 0 | |
| 2017 Q3 | 0 | 0 | 0 | |
| 2017 Q2 | 154 | 0 | 0 | 0.0 |
| 2017 Q1 | 220 | 0 | 0 | 0.0 |
| 2016 Q4 | 253 | 0 | 0 | 0.0 |
| 2016 Q3 | 48 | 0 | 0 | 0.0 |
| 2016 Q2 | 82 | 0 | 0 | 0.0 |
| 2016 Q1 | 88 | 2 | 0 | 22727.3 |
| 2015 Q4 | 178 | 0 | 0 | 0.0 |
| 2015 Q3 | 86 | 2 | 0 | 23255.8 |
| 2015 Q2 | 112 | 0 | 0 | 0.0 |
| 2013 Q2 | 271 | 2 | 0 | 7380.1 |
| 2013 Q1 | 608 | 0 | 0 | 0.0 |
| 2012 Q4 | 1,753 | 0 | 0 | 0.0 |
| 2012 Q3 | 1,946 | 0 | 0 | 0.0 |
| 2012 Q2 | 1,855 | 0 | 0 | 0.0 |
| 2012 Q1 | 1,606 | 0 | 0 | 0.0 |
| 2011 Q4 | 2,293 | 5 | 1 | 2180.5 |
| 2011 Q3 | 1,685 | 0 | 0 | 0.0 |
| 2011 Q2 | 1,458 | 4 | 1 | 2743.5 |
| 2011 Q1 | 459 | 0 | 0 | 0.0 |
| 2010 Q4 | 1,642 | 3 | 1 | 1827.0 |
| 2010 Q3 | 1,489 | 0 | 0 | 0.0 |
| 2010 Q2 | 1,639 | 2 | 2 | 1220.3 |
| 2010 Q1 | 1,192 | 2 | 1 | 1677.9 |
| 2009 Q4 | 1,868 | 0 | 0 | 0.0 |
| 2009 Q3 | 1,161 | 0 | 0 | 0.0 |
| 2009 Q2 | 1,561 | 1 | 0 | 640.6 |
| 2009 Q1 | 1,221 | 1 | 0 | 819.0 |
| 2008 Q4 | 2,762 | 0 | 0 | 0.0 |
| 2008 Q3 | 3,294 | 0 | 0 | 0.0 |
| 2008 Q2 | 2,414 | 0 | 0 | 0.0 |
| 2008 Q1 | 1,830 | 3 | 0 | 1639.3 |
| 2007 Q4 | 2,681 | 4 | 1 | 1492.0 |
| 2007 Q3 | 2,208 | 0 | 0 | 0.0 |
| 2007 Q2 | 1,702 | 2 | 1 | 1175.1 |
| 2007 Q1 | 866 | 0 | 0 | 0.0 |
| 2006 Q4 | 1,841 | 3 | 0 | 1629.5 |
| 2006 Q3 | 1,934 | 0 | 0 | 0.0 |
| 2006 Q2 | 1,962 | 3 | 1 | 1529.1 |
| 2006 Q1 | 1,709 | 1 | 0 | 585.1 |
| 2005 Q4 | 2,169 | 0 | 0 | 0.0 |
| 2005 Q3 | 2,453 | 4 | 0 | 1630.7 |
| 2005 Q2 | 2,756 | 0 | 0 | 0.0 |
| 2005 Q1 | 2,217 | 0 | 0 | 0.0 |
| 2004 Q4 | 2,547 | 5 | 2 | 1963.1 |
| 2004 Q3 | 2,835 | 0 | 0 | 0.0 |
| 2004 Q2 | 2,689 | 2 | 2 | 743.8 |
| 2004 Q1 | 2,114 | 0 | 0 | 0.0 |
| 2003 Q4 | 1,992 | 3 | 0 | 1506.0 |
| 2003 Q3 | 2,927 | 0 | 0 | 0.0 |
| 2003 Q2 | 2,582 | 0 | 0 | 0.0 |
| 2003 Q1 | 2,276 | 4 | 0 | 1757.5 |
| 2002 Q4 | 1,974 | 5 | 1 | 2532.9 |
| 2002 Q3 | 2,212 | 0 | 0 | 0.0 |
| 2002 Q2 | 2,000 | 0 | 0 | 0.0 |
| 2002 Q1 | 1,685 | 1 | 0 | 593.5 |
| 2001 Q4 | 2,227 | 0 | 0 | 0.0 |
| 2001 Q3 | 2,544 | 5 | 3 | 1965.4 |
| 2001 Q2 | 1,916 | 0 | 0 | 0.0 |
| 2001 Q1 | 3,243 | 0 | 0 | 0.0 |
| 2000 Q4 | 2,327 | 0 | 0 | 0.0 |
| 2000 Q3 | 2,956 | 0 | 0 | 0.0 |
| 2000 Q2 | 2,690 | 0 | 0 | 0.0 |
| 2000 Q1 | 2,137 | 0 | 0 | 0.0 |
No fatalities recorded at this mine.