Mission Valley Rock, LLC operator
Controlled by
Martin Marietta Materials Inc
MSHA operator ID: L36376
- Fatalities
- 0
- Total incidents
- 93
- Mines on record
- 1
- Years on record
- 1983–2025
Compliance record
MSHA citations since 2000
402
citations
99
significant & substantial
$224,933
proposed penalties
$215,816
paid to date
96% of proposed penalties paid to date, a $9,117 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
131
inspections on record
2,346
inspection hours
17.1
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.402 citations across 2,346 inspection hours.
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.$225K
proposed penalties
$216K
current assessed
$216K
paid to date
$0
outstanding
399 assessments are final orders; 7 contested dockets.
As of the most recent assessment on 2026-04-02.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- HANDLING OF MATERIALS 32 non-fatal
- SLIP OR FALL OF PERSON 16 non-fatal
- MACHINERY 14 non-fatal
- HANDTOOLS (NONPOWERED) 10 non-fatal
- POWERED HAULAGE 7 non-fatal
- OTHER 4 non-fatal
Incident timeline
2025
1
2022
1
2020
1
2017
2
2016
4
2013
1
2012
1
2011
2
2010
1
2008
1
2007
6
2006
2
2005
4
2004
3
2003
3
2002
4
2001
7
2000
6
1999
2
1998
5
1997
8
1996
7
1995
2
1994
5
1993
3
1992
3
1991
2
1990
1
1989
2
1987
1
1983
2
Mines on record
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The full compliance file on Mission Valley Rock, 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.