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Ridgecrest Rock Plant Metal/Non-Metal

Robertson's Ready Mix Ltd · Surface

Controlled by RRM Development Corporation; Mitsubishi Corp

InyoKern, Kern County, CA · Active

MSHA Mine ID: 0404163

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Email me when a new MSHA incident is filed at Ridgecrest Rock Plant.

Fatalities: 0
Total incidents: 3
Years on record: 2000–2004
Latest incident: Apr 2004

Compliance record

MSHA citations since 2000

citations

significant & substantial

$10,011

proposed penalties

$9,961

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Citations	S&S	Per 1M hrs
2025 Q4	1,585	0	0	0.0
2024 Q3	1,046	8	1	7648.2
2024 Q1	1,125	0	0	0.0
2023 Q4	1,185	0	0	0.0
2023 Q2	1,045	0	0	0.0
2022 Q4	405	0	0	0.0
2022 Q2	173	0	0	0.0
2010 Q1	633	0	0	0.0

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

Reportable incidents

3 on file

2004 · 1 incident

April 13, 2004 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON

Granite Construction Company · Fall down stairs

Employee tripped while walking up stairs (5) to office and strained his right knee, he has a history of knee problems and we have scheduled an MRI for a possible cartilage tear.

2002 · 1 incident

April 18, 2002 CA · Metal/Non-Metal weighman, scale person SLIP OR FALL OF PERSON

Granite Construction Company · Over-exertion (Not Elsewhere Classified)

EE HAD BEEN OPENING UPS FREIGHT BOXES AND SHE WENT IN TO THE NEXT ROOM TO GET SOME WATER, WHENSHE RETURNED SHE ATTEMPTED TO STEP OVER A BOX & FELL.

2000 · 1 incident

August 7, 2000 CA · Metal/Non-Metal mine manager, mine foreman, mine owner HANDTOOLS (NONPOWERED)

Cal-Ci-Co Rock Company Inc · Over-exertion in wielding or throwing objects

EMPLOYEE WAS USING A 16LB. SLEDGE HAMMER TO LOOSEN WEDGES ON CONE CRUSHER. HE HAD BEEN RUNNING AROCK BREAKER AND THE PAIN HAD REALLY GOTTEN WORSE.