Cornerstone Materials LLC operator
Controlled by
Donald L Blaser
MSHA operator ID: 0083525
- Fatalities
- 0
- Total incidents
- 25
- Mines on record
- 2
- Years on record
- 2007–2012
Compliance record
MSHA citations since 2009
15
citations
6
significant & substantial
$1,981
proposed penalties
$1,981
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2008
15
inspections on record
156
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: 156 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
15 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2014-08-07.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- HANDLING OF MATERIALS 15 non-fatal
- HANDTOOLS (NONPOWERED) 8 non-fatal
- OTHER 1 non-fatal
- SLIP OR FALL OF PERSON 1 non-fatal
Incident timeline
2012
3
2011
7
2010
3
2009
5
2008
5
2007
2
Mines on record
- Mills AZ
- Santa Cruz AZ
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The full compliance file on Cornerstone Materials LLC
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.