Data / Mines / Arizona / Navajo County
Mines in Navajo County, Arizona: 10 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 10 open mines in Navajo County, Arizona, run by 6 operators and employing 117 people. Since January 1, 2022 its inspectors issued 207 citations and orders there with $106,201 in proposed penalties, and operators reported 11 injury or illness cases. The operators with the most open mines are Perkins Cinders Inc; Brimhall Sand & Rock & Building Materials; W W Clyde & Co.. Data from MSHA, November 6, 2026.
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- Open mines
- 10
- Operators
- 6
- Employees
- 117
- Active
- 7
- NonProducing
- 1
- Intermittent
- 1
- Temporarily Idled
- 1
- Citations and orders since January 1, 2022
- 207
- Significant and substantial
- 52 (25.1%)
- Closure orders
- 7
- High negligence or reckless
- 40
- Proposed penalties
- $106,201
- Amount paid so far
- $85,362
- Inspections
- 106
- Inspector hours on site
- 860
- Citations per inspection
- 1.95 (all mines 2.30)
- Accident reports
- 11
- Injury and illness cases
- 11
- Fatalities
- 0
- Latest MSHA record
- September 15, 2026
Operators with the most open mines in Navajo County, Arizona
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Perkins Cinders Inc | 3 | 15 | 24 | $4,965 | 3 |
| Brimhall Sand & Rock & Building Materials | 2 | 33 | 79 | $44,063 | 1 |
| W W Clyde & Co. | 2 | 18 | 60 | $49,465 | 4 |
| Peabody Western Coal Company | 1 | 40 | 32 | $5,799 | 3 |
| Dyna Rock LLC | 1 | 5 | 7 | $1,181 | 0 |
| Western Materials, LLC | 1 | 6 | 5 | $728 | 0 |
Operators with the most citations in Navajo County, Arizona
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Brimhall Sand & Rock & Building Materials | 2 | 33 | 79 | $44,063 | 1 |
| W W Clyde & Co. | 2 | 18 | 60 | $49,465 | 4 |
| Peabody Western Coal Company | 1 | 40 | 32 | $5,799 | 3 |
| Perkins Cinders Inc | 3 | 15 | 24 | $4,965 | 3 |
| Dyna Rock LLC | 1 | 5 | 7 | $1,181 | 0 |
| Western Materials, LLC | 1 | 6 | 5 | $728 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Decker Pit | Brimhall Sand & Rock & Building Materials | Navajo County, AZ | Construction sand and gravel | 23 | 68 |
| Crushing Plant | W W Clyde & Co. | Navajo County, AZ | Construction sand and gravel | 14 | 37 |
| Kayenta Mine | Peabody Western Coal Company | Navajo County, AZ | Coal (bituminous) | 40 | 32 |
| Thunder Material Source | W W Clyde & Co. | Navajo County, AZ | Construction sand and gravel | 4 | 23 |
| Aztec Plant | Perkins Cinders Inc | Navajo County, AZ | Construction sand and gravel | 6 | 13 |
| Hardluck Quarry | Brimhall Sand & Rock & Building Materials | Navajo County, AZ | Crushed, broken stone | 10 | 11 |
| Owens Pit | Perkins Cinders Inc | Navajo County, AZ | Crushed, broken stone | 9 | 11 |
| Minnetonka Pit | Dyna Rock LLC | Navajo County, AZ | Construction sand and gravel | 5 | 7 |
| Western Materials Site #1 | Western Materials, LLC | Navajo County, AZ | Construction sand and gravel | 6 | 5 |
| Cooley Knoll Pit | Perkins Cinders Inc | Navajo County, AZ | Construction sand and gravel | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 7 | 70% |
| Crushed, broken stone | 2 | 20% |
| Coal (bituminous) | 1 | 10% |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 25 | 7 | $4,860 | 0 |
| 2023 | 53 | 8 | $8,995 | 3 |
| 2024 | 73 | 22 | $55,928 | 3 |
| 2025 | 38 | 11 | $29,512 | 5 |
| 2026 | 18 | 4 | $6,906 | 0 |
Standards cited most at mines in Navajo County, Arizona
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 20 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 16 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 15 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 9 |
| 30 CFR 77.1110 | Surface coal mines, safety | 8 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.23002 | Surface metal and nonmetal mines | 4 |
| 30 CFR 77.1606 | Surface coal mines, safety | 4 |
| 30 CFR 77.404 | Surface coal mines, safety | 4 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 4 |
Injury and illness cases at mines in Navajo County, Arizona
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 9 |
| No lost time, or an occupational illness | 2 |
What the accident reports at mines in Navajo County, Arizona describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 3 |
| Handtools (nonpowered) | 3 |
| Handling of materials | 2 |
| Powered haulage | 2 |
| Machinery | 1 |
Equipment named in accident reports at mines in Navajo County, Arizona
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 3 |
| Trucks | 2 |
| Hand tools (powered) | 1 |
| Raw coal storage | 1 |
| Forklift | 1 |
| Front-end loader | 1 |
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.