Data / Mines / Colorado / Sand and gravel mines

Sand and gravel mines in Colorado: 227 open mines

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

MSHA lists 227 open sand and gravel mines in Colorado, run by 118 operators and employing 1,006 people. Since January 1, 2022 its inspectors issued 2,532 citations and orders there with $973,806 in proposed penalties, and operators reported 84 injury or illness cases, 2 of them fatal. The operators with the most open mines are Oldcastle SW Group, Inc.; Arizona Materials; Martin Marietta Materials, Inc.. Data from MSHA, November 6, 2026.

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Open mines

227

Operators

118

Employees

1,006

Intermittent

110

Active

99

Temporarily Idled

17

New Mine

1

Mines run by individuals, counted and not listed

13

Citations and orders since January 1, 2022

2,532

Significant and substantial

494 (19.5%)

Closure orders

38

High negligence or reckless

294

Proposed penalties

$973,806

Amount paid so far

$856,984

Inspections

1,895

Inspector hours on site

11,001

Citations per inspection

1.34 (all mines 2.30)

Accident reports

85

Injury and illness cases

84

Fatalities

2

Latest MSHA record

November 5, 2026

Operators with the most open mines in Colorado

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

Operators with the most citations in Colorado

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 Colorado

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 Colorado

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

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

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

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

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.