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Data / Mines / Robertson's Ready Mix Ltd

Robertson's Ready Mix Ltd: 11 open mines, 136 MSHA citations

Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.

Robertson's Ready Mix Ltd (MSHA operator ID L14361) operates 11 open mines with 151 employees in California, Nevada, mostly construction sand and gravel. Since January 1, 2022 MSHA inspectors issued it 136 citations and orders with $54,549 in proposed penalties, and it reported 33 injury or illness cases. Data from MSHA, November 6, 2026.

The request: Watch Robertson's Ready Mix Ltd (MSHA operator ID L14361): each new citation, each accident report and each new mine. $10 of work on sign-up, no card.

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MSHA operator ID
L14361
Open mines
11
Employees at open mines
151
States
California, Nevada
Citations and orders since January 1, 2022
136
Significant and substantial
34 (25.0%)
Closure orders
6
High negligence or reckless
15
Proposed penalties
$54,549
Amount paid so far
$36,896
Inspections
147
Inspector hours on site
982
Citations per inspection
0.93 (all mines 2.30)
Accident reports
34
Injury and illness cases
33
Fatalities
0
Latest MSHA record
October 28, 2026

Open mines of Robertson's Ready Mix Ltd

Ranked by citations since January 1, 2022.

MineOperatorCountyMain commodityEmployeesCitations since 2022
El Cajon QuarryRobertson's Ready Mix LtdSan Diego County, CACrushed, broken granite529
Jean PlantRobertson's Ready Mix LtdClark County, NVConstruction sand and gravel1121
RedlandsRobertson's Ready Mix LtdSan Bernardino County, CAConstruction sand and gravel1218
Juniper FlatsRobertson's Ready Mix LtdRiverside County, CAConstruction sand and gravel616
CoronaRobertson's Ready Mix LtdRiverside County, CAConstruction sand and gravel2713
PalmdaleRobertson's Ready Mix LtdLos Angeles County, CAConstruction sand and gravel1011
BanningRobertson's Ready Mix LtdRiverside County, CAConstruction sand and gravel1410
Ridgecrest Rock PlantRobertson's Ready Mix LtdKern County, CAConstruction sand and gravel210
CabazonRobertson's Ready Mix LtdRiverside County, CAConstruction sand and gravel287
RialtoRobertson's Ready Mix LtdSan Bernardino County, CAConstruction sand and gravel284
Lucerne ValleyRobertson's Ready Mix LtdSan Bernardino County, CAConstruction sand and gravel83

Citations and injury cases by year

Calendar years since 2022; 2026 runs to the date of the MSHA files.

YearCitations and ordersSignificant and substantialProposed penaltiesInjury and illness cases
2022246$5,9137
20233616$28,64910
2024232$5,1757
2025365$5,8924
2026175$8,9205

Standards cited most at Robertson's Ready Mix Ltd

Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.

StandardWhat the part coversCitations
30 CFR 56.12004Surface metal and nonmetal mines13
30 CFR 56.14112Surface metal and nonmetal mines13
30 CFR 56.14100Surface metal and nonmetal mines11
30 CFR 56.14107Surface metal and nonmetal mines9
30 CFR 56.20003Surface metal and nonmetal mines8
30 CFR 56.12008Surface metal and nonmetal mines7
30 CFR 56.12002Surface metal and nonmetal mines6
30 CFR 56.12032Surface metal and nonmetal mines5
30 CFR 56.14101Surface metal and nonmetal mines4
30 CFR 46.7Training at sand, gravel and surface stone mines4
30 CFR 56.18002Surface metal and nonmetal mines4
30 CFR 56.14207Surface metal and nonmetal mines3
30 CFR 56.11001Surface metal and nonmetal mines3
30 CFR 56.14132Surface metal and nonmetal mines3
30 CFR 56.14105Surface metal and nonmetal mines3

Injury and illness cases at Robertson's Ready Mix Ltd

Accident reports by degree of injury, as the operator reported them to MSHA.

DegreeCases
Days away from work or restricted activity26
No lost time, or an occupational illness7

What the accident reports at Robertson's Ready Mix Ltd describe

Accident classification, as MSHA codes the circumstances that contributed most directly.

ClassificationReports
Handling of materials6
Handtools (nonpowered)6
Slip or fall of person6
Machinery5
Powered haulage3
Other3
Disorders (repeated trauma)2
Striking or bumping2
Stepping or kneeling on object1

Equipment named in accident reports at Robertson's Ready Mix Ltd

EquipmentReports
Hand tools (not powered)6
Ore haulage trucks - off highway trucks2
Welding machine2
Front-end loader2
Tugger1
Hand tools (powered)1
Shovel1

Commodities

Main commodityOpen mines
Construction sand and gravel10
Crushed, broken granite1

US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.