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: 219 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Westford Quarry has $1K 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.
$1K
proposed penalties
$1K
current assessed
$1K
paid to date
$0
outstanding
13 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2012-07-11.
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.
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: 2011-04-26, 15 years ago
0%
of limit-tested samples over the exposure limit
5
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg4
Quartz, respirable, >1% Qtz1
Show the individual readings (5)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2011-04-26
Respirable dust, <.1mg
0
Front-end Loader Operator
2011-04-26
Respirable dust, <.1mg
0
Front-end Loader Operator
2011-04-26
Respirable dust, <.1mg
0
Crusher Oper/Worker
2004-05-06
Quartz, respirable, >1% Qtz
0.13
0.47
0.28
Crusher Oper/Worker
2004-05-06
Respirable dust, <.1mg
0
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2013
1
2012
3
2011
3
2010
3
2009
3
2008
4
2007
4
2006
4
2005
4
2004
4
2003
4
2002
4
2001
4
2000
4
Source: MSHA quarterly employment and production, updated weekly.
Westford Quarry sits in Middlesex County, Massachusetts, 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.
Middlesex County, Massachusetts · Population 1,622,896
0.0%
Mining share of county employment
$126,779
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
9:30 A DRIVER OF ONE TRUCK HAD PARKED HIS TRUCK TO BE LOADED. HE GOT OUT OF HIS TRUCK TO O OVER TO THE OTHER TRUCK. A[T] SOME TIME HE POSITIONED HIMSELF BEHIND THE OTHER TRUCK WHICH PROCEEDED TO BACK UP. THE VICTIM WAS RUN OVER BY THE TRUCK WHICH WAS BACKING UP.
Reportable incidents
3 on file (excluding fatalities above)
1993 · 1 incident
October 5, 1993MA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)