Data / Mines / California / Sand and gravel mines

Sand and gravel mines in California: 244 open mines

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

MSHA lists 244 open sand and gravel mines in California, run by 151 operators and employing 2,489 people. Since January 1, 2022 its inspectors issued 4,204 citations and orders there with $2,820,581 in proposed penalties, and operators reported 231 injury or illness cases, 2 of them fatal. The operators with the most open mines are CalMat Co; Robertson's Ready Mix Ltd; Granite Construction Company. Data from MSHA, November 6, 2026.

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Open mines

244

Operators

151

Employees

2,489

Active

173

Intermittent

65

Temporarily Idled

6

Mines run by individuals, counted and not listed

12

Citations and orders since January 1, 2022

4,204

Significant and substantial

829 (19.7%)

Closure orders

122

High negligence or reckless

325

Proposed penalties

$2,820,581

Amount paid so far

$1,838,887

Inspections

2,952

Inspector hours on site

18,276

Citations per inspection

1.42 (all mines 2.30)

Accident reports

239

Injury and illness cases

231

Fatalities

2

Latest MSHA record

November 5, 2026

Operators with the most open mines in California

Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.

Operators with the most citations in California

Citations and orders issued since January 1, 2022 at their open mines here.

Mines with the most citations

Open mines, ranked by citations and orders since January 1, 2022.

Main commodities

Citations and injury cases by year

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

Standards cited most at sand and gravel mines in California

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

Injury and illness cases at sand and gravel mines in California

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

What the accident reports at sand and gravel mines in California describe

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

Equipment named in accident reports at sand and gravel mines in California

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.