O & G PROSPECT QUARRY #3 has $6K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
1
Years on record
1984
Latest incident
Aug 1984
Compliance record
MSHA citations since 2001
35
citations
11
significant & substantial
$5,604
proposed penalties
$5,604
paid to date
100% of proposed penalties paid to date, a $0 gap.
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: 275 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
O & G PROSPECT QUARRY #3 has $6K in proposed MSHA penalties and $0 outstanding across 2 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.
$6K
proposed penalties
$6K
current assessed
$6K
paid to date
$0
outstanding
32 assessments are final orders; 2 contested dockets.
Of $2K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2025-07-07.
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.
10citations taken to the federal commission · 29% of citations on record
Stood as issued
8 · 80%
Vacated or withdrawn
2 · 20%
100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 3 decided S&S contests · industry: 79%
14%
Penalty reduction in decided contests
$2K proposed, $1K 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 2010-07-13.
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: 2025-07-08
22%
of limit-tested samples over the exposure limit
13
samples
9
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz102 over
Respirable dust, <.1mg3
Show the individual readings (13)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2010-05-19
Quartz, respirable, >1% Qtz
1.11
0.49
2.27
Laborer, Bullgang
2001-05-03
Quartz, respirable, >1% Qtz
0.26
0.26
1.00
Truck Driver
2025-07-08
Quartz, respirable, >1% Qtz
0.14
Jackhammer Operator
2025-07-08
Respirable dust, <.1mg
0
Backhoe Operator
2025-07-08
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-07-07
Quartz, respirable, >1% Qtz
0.19
1.22
0.16
Laborer, Bullgang
2010-05-19
Quartz, respirable, >1% Qtz
0.24
0.34
0.71
Laborer, Bullgang
2010-05-19
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-05-19
Quartz, respirable, >1% Qtz
0.2
0.62
0.32
Crusher Oper/Worker
2010-04-20
Quartz, respirable, >1% Qtz
0.28
0.4
0.70
Drill Helper
2005-08-18
Quartz, respirable, >1% Qtz
0.33
1.33
0.25
Drill Operator, Rotary Air
2001-05-03
Quartz, respirable, >1% Qtz
1.09
1.75
0.62
Crusher Oper/Worker
2001-05-03
Quartz, respirable, >1% Qtz
0.42
0.8
0.53
Truck Driver
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
6
2025
4
2014
1
2013
1
2012
1
2011
1
2010
2
2007
1
2006
5
2005
3
2004
3
2003
3
2002
2
2001
3
2000
3
Source: MSHA quarterly employment and production, updated weekly.
O & G PROSPECT QUARRY #3 sits in Naugatuck Valley Planning Region, Connecticut, where the Census mining category is 0.0% 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.
Naugatuck Valley Planning Region, Connecticut · Population 452,303
0.0%
Mining share of county employment
$86,365
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
501
0
0
0.0
2026 Q1
234
0
0
0.0
2025 Q3
850
1
0
1176.5
2025 Q2
685
0
0
0.0
2014 Q4
8
0
0
0.0
2014 Q3
582
0
0
0.0
2014 Q2
555
0
0
0.0
2014 Q1
464
0
0
0.0
Show 45 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2013 Q4
277
0
0
0.0
2013 Q3
7
0
0
0.0
2013 Q2
26
0
0
0.0
2013 Q1
0
0
0
2012 Q4
6
0
0
0.0
2012 Q3
0
0
0
2012 Q2
8
0
0
0.0
2012 Q1
78
1
0
12820.5
2011 Q4
18
0
0
0.0
2011 Q3
34
0
0
0.0
2011 Q2
48
0
0
0.0
2011 Q1
0
0
0
2010 Q4
358
0
0
0.0
2010 Q3
837
0
0
0.0
2010 Q2
880
2
1
2272.7
2007 Q2
0
0
0
2007 Q1
1
0
0
0.0
2006 Q4
977
0
0
0.0
2006 Q3
1,511
1
0
661.8
2006 Q2
1,599
0
0
0.0
2006 Q1
1
0
0
0.0
2005 Q4
1,252
0
0
0.0
2005 Q3
1,466
5
2
3410.6
2005 Q2
1,184
0
0
0.0
2005 Q1
1
0
0
0.0
2004 Q4
3,512
0
0
0.0
2004 Q3
6
2
0
333333.3
2004 Q2
22
0
0
0.0
2004 Q1
1
0
0
0.0
2003 Q4
39
0
0
0.0
2003 Q3
130
0
0
0.0
2003 Q2
138
2
0
14492.8
2003 Q1
898
0
0
0.0
2002 Q4
128
0
0
0.0
2002 Q3
217
0
0
0.0
2002 Q2
120
1
0
8333.3
2002 Q1
250
0
0
0.0
2001 Q4
107
0
0
0.0
2001 Q3
141
0
0
0.0
2001 Q2
156
6
3
38461.5
2001 Q1
955
0
0
0.0
2000 Q4
159
0
0
0.0
2000 Q3
126
0
0
0.0
2000 Q2
130
0
0
0.0
2000 Q1
207
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
1 on file
1984 · 1 incident
August 1, 1984CT · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)