Mining Incidents

Granite State Concrete Quarry: 47 MSHA citations Metal/Non-Metal

Milford, Hillsborough County, NH  ·  Intermittent
MSHA Mine ID: 2700430

Granite State Concrete Quarry has $6K in proposed MSHA penalties and $948 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
0
Years on record
Latest incident
Compliance record
MSHA citations since 2008
47
citations
5
significant & substantial
$6,057
proposed penalties
$5,109
paid to date
84% of proposed penalties paid to date, a $948 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2008
24
inspections on record
349
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: 349 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Granite State Concrete Quarry has $6K in proposed MSHA penalties and $948 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.
$6K
proposed penalties
$6K
current assessed
$5K
paid to date
$948
outstanding
47 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-02.
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.
10.6%
significant & substantial
2.1%
high negligence or reckless
10.6%
reasonably likely or greater
59.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 25.5% low, 72.3% moderate, 2.1% 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: 2021-09-28, 4 years ago
0%
of limit-tested samples over the exposure limit
8
samples
4
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz5
  • Respirable dust, <.1mg3
Show the individual readings (8)
Date Contaminant Concentration Limit Conc / limit Occupation
2021-09-28 Quartz, respirable, >1% Qtz 0.42 Crusher Oper/Worker
2021-09-28 Respirable dust, <.1mg 0 Truck Driver
2016-07-12 Quartz, respirable, >1% Qtz 0.14 0.72 0.19 Front-end Loader Operator
2016-07-12 Quartz, respirable, >1% Qtz 0.3 0.62 0.48 Truck Driver
2016-07-12 Respirable dust, <.1mg 0 Drill Operator, Rotary
2008-06-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2008-06-04 Quartz, respirable, >1% Qtz 0.16 0.84 0.19 Truck Driver
2008-06-04 Quartz, respirable, >1% Qtz 0.26 0.45 0.58 Crusher Oper/Worker
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
  1. Granite State Concrete Co. Inc 2008 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 4
2024 4
2023 4
2022 3
2021 3
2020 2
2019 2
2018 3
2017 5
2016 2
2015 4
2014 3
2013 4
2012 5
2011 2
2010 6
2009 2
2008 4
Source: MSHA quarterly employment and production, updated weekly.

Granite State Concrete Quarry sits in Hillsborough County, New Hampshire, 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.
Hillsborough County, New Hampshire · Population 424,732
0.0%
Mining share of county employment
$100,436
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 1,803 4 1 2218.5
2026 Q1 1,090 0 0 0.0
2025 Q4 2,316 0 0 0.0
2025 Q3 2,367 1 0 422.5
2025 Q2 1,716 0 0 0.0
2025 Q1 370 0 0 0.0
2024 Q4 339 0 0 0.0
2024 Q3 2,591 0 0 0.0
Show 63 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 2,419 3 0 1240.2
2024 Q1 661 0 0 0.0
2023 Q4 2,558 0 0 0.0
2023 Q3 2,152 0 0 0.0
2023 Q2 1,500 2 0 1333.3
2023 Q1 0 0 0
2022 Q4 1,316 0 0 0.0
2022 Q3 1,800 0 0 0.0
2022 Q2 1,585 1 0 630.9
2022 Q1 0 0 0
2021 Q4 875 0 0 0.0
2021 Q3 1,485 0 0 0.0
2021 Q2 1,200 3 0 2500.0
2021 Q1 0 0 0
2020 Q4 363 0 0 0.0
2020 Q3 595 2 0 3361.3
2020 Q2 0 0 0
2020 Q1 0 0 0
2019 Q4 0 0 0
2019 Q3 1,854 0 0 0.0
2019 Q2 863 8 1 9270.0
2019 Q1 0 0 0
2018 Q4 312 0 0 0.0
2018 Q3 1,378 0 0 0.0
2018 Q2 365 3 0 8219.2
2018 Q1 0 0 0
2017 Q4 630 0 0 0.0
2017 Q3 1,131 3 3 2652.5
2016 Q4 0 0 0
2016 Q3 2,446 1 0 408.8
2016 Q2 37 0 0 0.0
2016 Q1 0 0 0
2015 Q4 454 0 0 0.0
2015 Q3 504 1 0 1984.1
2015 Q2 303 0 0 0.0
2015 Q1 0 0 0
2014 Q4 534 0 0 0.0
2014 Q3 1,072 1 0 932.8
2014 Q2 0 0 0
2013 Q4 959 0 0 0.0
2013 Q3 835 2 0 2395.2
2013 Q2 0 0 0
2013 Q1 0 0 0
2012 Q4 402 0 0 0.0
2012 Q3 1,073 4 0 3727.9
2012 Q2 694 0 0 0.0
2012 Q1 0 0 0
2011 Q4 207 0 0 0.0
2011 Q3 171 0 0 0.0
2011 Q2 0 0 0
2011 Q1 0 0 0
2010 Q4 1,053 0 0 0.0
2010 Q3 717 0 0 0.0
2010 Q2 1,138 0 0 0.0
2010 Q1 0 0 0
2009 Q4 400 0 0 0.0
2009 Q3 1,079 0 0 0.0
2009 Q2 479 0 0 0.0
2009 Q1 0 0 0
2008 Q4 1,799 0 0 0.0
2008 Q3 2,400 5 0 2083.3
2008 Q2 1,855 3 0 1617.3
2008 Q1 0 0 0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.