RRM Development Corporation; Mitsubishi Corp controller
MSHA controller ID: M11611
Watch this controller
Email me when a new MSHA incident is filed at any mine RRM Development Corporation; Mitsubishi Corp controls.
- Fatalities
- 0
- Total incidents
- 144
- Mines on record
- 12
- Years on record
- 1996–2026
Compliance record
MSHA citations since 2000
1,205
citations
315
significant & substantial
$503,414
proposed penalties
$451,521
paid to date
90% of proposed penalties paid to date, a $51,893 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
553
inspections on record
9,639
inspection hours
12.5
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.1,205 citations across 9,639 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.$503K
proposed penalties
$452K
current assessed
$452K
paid to date
$0
outstanding
1,183 assessments are final orders; 17 contested dockets.
As of the most recent assessment on 2026-03-04.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- HANDLING OF MATERIALS 34 non-fatal
- SLIP OR FALL OF PERSON 34 non-fatal
- HANDTOOLS (NONPOWERED) 23 non-fatal
- POWERED HAULAGE 20 non-fatal
- OTHER 11 non-fatal
- MACHINERY 9 non-fatal
Incident timeline
2026
3
2025
4
2024
7
2023
10
2022
8
2021
13
2020
10
2019
6
2018
8
2017
6
2016
4
2015
8
2014
1
2013
2
2012
1
2011
1
2010
1
2009
2
2007
1
2006
7
2005
1
2004
1
2003
3
2002
3
2001
5
2000
3
1999
9
1998
8
1997
6
1996
2
Operators under this controller
Mines on record
- Palmdale CA
- Cabazon CA
- Corona CA
- Rialto CA
- Jean Plant NV
- El Cajon Quarry CA
- Banning CA
- Redlands CA
- Lucerne Valley CA
- Star CA
- Barstow CA
- Ridgecrest Rock Plant CA
For insurers, brokers, and safety consultants
The full compliance file on RRM Development Corporation; Mitsubishi Corp
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.