On 6/17/25 employee provided a modified duty work status report from their personal doctor dated 6/12/25. On 4/25/25 employee reported a first aid from pain to their right arm while placing a wear liner into position. Employee self procured medical treatment, was diagnosed with a ruptured bicep, and restricted duty is being accommodated.
Superior - Twin OaksMetal/Nonmetal
Superior Ready Mix Concrete L.P. · Surface
Controlled by Vulcan Materials Company
San Marcos, San Diego County, CA · Active
MSHA Mine ID: 0405514
- Fatalities
- 0
- Total incidents
- 8
- Years on record
- 2005–2025
- Latest incident
- Apr 2025
No fatalities recorded at this mine.
Reportable incidents
8 on file2025 · 1 incident
Over-exertion in lifting objects
2024 · 1 incident
Fall from machine
Employee was getting on the loader and missed a step, falling backwards on their right arm/wrist.
2022 · 1 incident
2021 · 1 incident
Fall from machine
Employee slipped and fell climbing from ladder to the cone crusher, injuring lower back.
2009 · 1 incident
Over-exertion (Not Elsewhere Classified)
Employee was standing and stepped to the side and twisted his knee
2007 · 1 incident
Over-exertion (Not Elsewhere Classified)
sprain of hip and thigh due to normal activity, repetitive application of break on loader.
2006 · 1 incident
Over-exertion (Not Elsewhere Classified)
Uneven ground at base of ladder, employee stepped into a pothole.
2005 · 1 incident
Struck by... (Not Elsewhere Classified)
Employee was operating plant. A rock became lodged in a conveyor belt. Employee used a pry bar and hammer to dislodge rock. Hammer struck pry bar, pry bar struck employee's finger.