Robertson's operator
Controlled by
RRM Development Corporation; Mitsubishi Corp
MSHA operator ID: L14361
Watch this operator
Email me when a new MSHA incident is filed at any Robertson's mine.
- Fatalities
- 0
- Total incidents
- 117
- Mines on record
- 10
- Years on record
- 2000–2026
Compliance record
MSHA citations since 2000
1,200
citations
312
significant & substantial
$503,240
proposed penalties
$451,347
paid to date
Source: MSHA violations data, updated weekly.
Top causes
- HANDLING OF MATERIALS 30 non-fatal
- SLIP OR FALL OF PERSON 30 non-fatal
- HANDTOOLS (NONPOWERED) 17 non-fatal
- POWERED HAULAGE 15 non-fatal
- OTHER 8 non-fatal
- MACHINERY 5 non-fatal
Incident timeline
2026
1
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
Mines on record
- Corona CA
- Rialto CA
- Cabazon CA
- Jean Plant NV
- El Cajon Quarry CA
- Banning CA
- Redlands CA
- Lucerne Valley CA
- Palmdale CA
- Star CA