Masonville Stone Company · Fall from machine
When releasing pressure from radiator cap, antifreeze gushed out burning foot. Operator jumped from loader and cracked foot bone on landing.
MASONVILLE QUARRY Metal/Non-Metal
Masonville Stone Company
· Surface
Controlled by
Glenn E Southwick
Masonville,
Larimer County,
CO
·
Active
MSHA Mine ID: 0504013
MASONVILLE QUARRY has $58K in proposed MSHA penalties and $0 outstanding across 5 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 1
- Years on record
- 2007
- Latest incident
- Jul 2007
Compliance record
MSHA citations since 2001
130
citations
37
significant & substantial
$57,673
proposed penalties
$52,201
paid to date
91% of proposed penalties paid to date, a $5,472 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
61
inspections on record
700
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: 700 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
MASONVILLE QUARRY has $58K in proposed MSHA penalties and $0 outstanding across 5 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.$58K
proposed penalties
$52K
current assessed
$52K
paid to date
$0
outstanding
111 assessments are final orders; 5 contested dockets.
As of the most recent assessment on 2026-05-07.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also
the operator's enforcement record
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 |
|---|---|---|---|---|
| 2025 Q4 | 750 | 0 | 0 | 0.0 |
| 2025 Q3 | 900 | 0 | 0 | 0.0 |
| 2025 Q2 | 850 | 1 | 0 | 1176.5 |
| 2025 Q1 | 500 | 0 | 0 | 0.0 |
| 2024 Q4 | 750 | 4 | 0 | 5333.3 |
| 2024 Q3 | 750 | 0 | 0 | 0.0 |
| 2024 Q2 | 900 | 2 | 0 | 2222.2 |
| 2024 Q1 | 700 | 0 | 0 | 0.0 |
Show 96 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 900 | 4 | 0 | 4444.4 |
| 2023 Q3 | 930 | 0 | 0 | 0.0 |
| 2023 Q2 | 930 | 1 | 0 | 1075.3 |
| 2023 Q1 | 400 | 0 | 0 | 0.0 |
| 2022 Q4 | 760 | 0 | 0 | 0.0 |
| 2022 Q3 | 930 | 0 | 0 | 0.0 |
| 2022 Q2 | 940 | 2 | 0 | 2127.7 |
| 2022 Q1 | 930 | 2 | 0 | 2150.5 |
| 2021 Q4 | 875 | 0 | 0 | 0.0 |
| 2021 Q3 | 875 | 0 | 0 | 0.0 |
| 2021 Q2 | 915 | 3 | 0 | 3278.7 |
| 2021 Q1 | 810 | 2 | 1 | 2469.1 |
| 2020 Q4 | 1,115 | 0 | 0 | 0.0 |
| 2020 Q3 | 1,240 | 0 | 0 | 0.0 |
| 2020 Q2 | 1,115 | 1 | 0 | 896.9 |
| 2020 Q1 | 810 | 1 | 0 | 1234.6 |
| 2019 Q4 | 875 | 0 | 0 | 0.0 |
| 2019 Q3 | 1,050 | 0 | 0 | 0.0 |
| 2019 Q2 | 625 | 2 | 0 | 3200.0 |
| 2019 Q1 | 590 | 0 | 0 | 0.0 |
| 2018 Q4 | 875 | 0 | 0 | 0.0 |
| 2018 Q3 | 930 | 1 | 0 | 1075.3 |
| 2018 Q2 | 940 | 0 | 0 | 0.0 |
| 2018 Q1 | 750 | 0 | 0 | 0.0 |
| 2017 Q4 | 810 | 2 | 1 | 2469.1 |
| 2017 Q3 | 925 | 0 | 0 | 0.0 |
| 2017 Q2 | 950 | 0 | 0 | 0.0 |
| 2017 Q1 | 1,156 | 0 | 0 | 0.0 |
| 2016 Q4 | 1,520 | 0 | 0 | 0.0 |
| 2016 Q3 | 1,600 | 1 | 0 | 625.0 |
| 2016 Q2 | 1,500 | 0 | 0 | 0.0 |
| 2016 Q1 | 1,200 | 1 | 0 | 833.3 |
| 2015 Q4 | 1,050 | 0 | 0 | 0.0 |
| 2015 Q3 | 1,850 | 0 | 0 | 0.0 |
| 2015 Q2 | 1,800 | 0 | 0 | 0.0 |
| 2015 Q1 | 1,400 | 0 | 0 | 0.0 |
| 2014 Q4 | 1,100 | 0 | 0 | 0.0 |
| 2014 Q3 | 1,235 | 8 | 4 | 6477.7 |
| 2014 Q2 | 1,200 | 0 | 0 | 0.0 |
| 2014 Q1 | 700 | 1 | 0 | 1428.6 |
| 2013 Q4 | 845 | 0 | 0 | 0.0 |
| 2013 Q3 | 1,120 | 0 | 0 | 0.0 |
| 2013 Q2 | 1,300 | 0 | 0 | 0.0 |
| 2013 Q1 | 850 | 0 | 0 | 0.0 |
| 2012 Q4 | 650 | 2 | 0 | 3076.9 |
| 2012 Q3 | 1,700 | 9 | 4 | 5294.1 |
| 2012 Q2 | 1,400 | 0 | 0 | 0.0 |
| 2012 Q1 | 1,250 | 0 | 0 | 0.0 |
| 2011 Q4 | 900 | 0 | 0 | 0.0 |
| 2011 Q3 | 1,400 | 3 | 2 | 2142.9 |
| 2011 Q2 | 1,380 | 0 | 0 | 0.0 |
| 2011 Q1 | 1,420 | 0 | 0 | 0.0 |
| 2010 Q4 | 520 | 10 | 3 | 19230.8 |
| 2010 Q3 | 1,200 | 0 | 0 | 0.0 |
| 2010 Q2 | 1,200 | 0 | 0 | 0.0 |
| 2010 Q1 | 600 | 1 | 0 | 1666.7 |
| 2009 Q4 | 900 | 4 | 2 | 4444.4 |
| 2009 Q3 | 1,200 | 2 | 1 | 1666.7 |
| 2009 Q2 | 1,800 | 0 | 0 | 0.0 |
| 2009 Q1 | 1,550 | 0 | 0 | 0.0 |
| 2008 Q4 | 1,200 | 0 | 0 | 0.0 |
| 2008 Q3 | 2,150 | 0 | 0 | 0.0 |
| 2008 Q2 | 1,800 | 0 | 0 | 0.0 |
| 2008 Q1 | 1,190 | 0 | 0 | 0.0 |
| 2007 Q4 | 1,000 | 1 | 0 | 1000.0 |
| 2007 Q3 | 1,930 | 37 | 12 | 19171.0 |
| 2007 Q2 | 1,420 | 0 | 0 | 0.0 |
| 2007 Q1 | 2,040 | 0 | 0 | 0.0 |
| 2006 Q4 | 1,500 | 0 | 0 | 0.0 |
| 2006 Q3 | 1,800 | 0 | 0 | 0.0 |
| 2006 Q2 | 2,250 | 0 | 0 | 0.0 |
| 2006 Q1 | 1,500 | 0 | 0 | 0.0 |
| 2005 Q4 | 1,200 | 0 | 0 | 0.0 |
| 2005 Q3 | 2,250 | 0 | 0 | 0.0 |
| 2005 Q2 | 2,200 | 0 | 0 | 0.0 |
| 2005 Q1 | 1,750 | 0 | 0 | 0.0 |
| 2004 Q4 | 900 | 0 | 0 | 0.0 |
| 2004 Q3 | 1,900 | 0 | 0 | 0.0 |
| 2004 Q2 | 1,600 | 0 | 0 | 0.0 |
| 2004 Q1 | 2,200 | 3 | 0 | 1363.6 |
| 2003 Q4 | 1,340 | 7 | 2 | 5223.9 |
| 2003 Q3 | 2,700 | 3 | 0 | 1111.1 |
| 2003 Q2 | 2,500 | 0 | 0 | 0.0 |
| 2003 Q1 | 1,500 | 0 | 0 | 0.0 |
| 2002 Q4 | 1,080 | 0 | 0 | 0.0 |
| 2002 Q3 | 2,500 | 2 | 0 | 800.0 |
| 2002 Q2 | 2,800 | 0 | 0 | 0.0 |
| 2002 Q1 | 1,920 | 0 | 0 | 0.0 |
| 2001 Q4 | 1,600 | 0 | 0 | 0.0 |
| 2001 Q3 | 0 | 2 | 2 | |
| 2001 Q2 | 2,880 | 0 | 0 | 0.0 |
| 2001 Q1 | 2,800 | 0 | 0 | 0.0 |
| 2000 Q4 | 1,000 | 0 | 0 | 0.0 |
| 2000 Q3 | 480 | 0 | 0 | 0.0 |
| 2000 Q2 | 360 | 0 | 0 | 0.0 |
| 2000 Q1 | 1,500 | 0 | 0 | 0.0 |
No fatalities recorded at this mine.
Reportable incidents
1 on file2007 · 1 incident
For insurers, brokers, and safety consultants
The full compliance file on MASONVILLE QUARRY
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.