Data / Mines / Arizona / Maricopa County
Mines in Maricopa County, Arizona: 72 open mines
MSHA lists 72 open mines in Maricopa County, Arizona, run by 30 operators and employing 569 people. Since January 1, 2022 its inspectors issued 1,063 citations and orders there with $416,318 in proposed penalties, and operators reported 68 injury or illness cases. The operators with the most open mines are Superstition Crushing L.L.C.; CalMat Co; Custom Landscape Materials LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 72
- Operators
- 30
- Employees
- 569
- Active
- 37
- Intermittent
- 18
- Temporarily Idled
- 10
- New Mine
- 6
- NonProducing
- 1
- Mines run by individuals, counted and not listed
- 10
- Citations and orders since January 1, 2022
- 1,063
- Significant and substantial
- 208 (19.6%)
- Closure orders
- 16
- High negligence or reckless
- 79
- Proposed penalties
- $416,318
- Amount paid so far
- $304,560
- Inspections
- 642
- Inspector hours on site
- 3,542
- Citations per inspection
- 1.66 (all mines 2.30)
- Accident reports
- 71
- Injury and illness cases
- 68
- Fatalities
- 0
- Latest MSHA record
- November 2, 2026
Operators with the most open mines in Maricopa County, Arizona
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
Operators with the most citations in Maricopa County, Arizona
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.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Turner North T2 | Custom Landscape Materials LLC | Maricopa County, AZ | Construction sand and gravel | 7 | 60 |
| Hillside Plant | Kilauea Crushers Inc | Maricopa County, AZ | Crushed, broken stone | 8 | 57 |
| Picacho Plant | Kilauea Crushers Inc | Maricopa County, AZ | Crushed, broken granite | 20 | 56 |
| The Ridge | Kilauea Crushers Inc | Maricopa County, AZ | Construction sand and gravel | 25 | 49 |
| Big Horn Mine | Custom Landscape Materials LLC | Maricopa County, AZ | Crushed, broken stone | 8 | 39 |
| Jackrabbit Aggregates | CalPortland Company | Maricopa County, AZ | Construction sand and gravel | 15 | 31 |
| West Side Pit | M.R. Tanner Mining, Inc. | Maricopa County, AZ | Construction sand and gravel | 11 | 31 |
| Armco | Arizona Native Aggregate | Maricopa County, AZ | Sand, common | 15 | 30 |
| 1016 Peoria | Arcosa Aggregates West, LLC. | Maricopa County, AZ | Construction sand and gravel | 10 | 30 |
| Fort McDowell Yavapai Materials-Plt1 #1 | Fort Mc Dowell Yavapai Materials | Maricopa County, AZ | Construction sand and gravel | 9 | 29 |
| Phoenix | West Coast Sand & Gravel, Inc. | Maricopa County, AZ | Construction sand and gravel | 5 | 28 |
| Mine #2 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 5 | 27 |
| Pit #1 43RD Ave | Arizona Materials | Maricopa County, AZ | Construction sand and gravel | 14 | 26 |
| 0screening Plant & Shop | A & a Materials Inc | Maricopa County, AZ | Construction sand and gravel | 7 | 26 |
| Plant 1 | Desert Aggregates | Maricopa County, AZ | Construction sand and gravel | 23 | 25 |
| D41 | Western Aggregates L.L.C. | Maricopa County, AZ | Construction sand and gravel | 13 | 24 |
| Maxus02 | Maxus Construction Materials LLC | Maricopa County, AZ | Construction sand and gravel | 4 | 24 |
| West Broadway | CalMat Co | Maricopa County, AZ | Construction sand and gravel | 39 | 23 |
| Mine #7 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 6 | 23 |
| KB-1 | Custom Landscape Materials LLC | Maricopa County, AZ | Crushed, broken stone | 4 | 23 |
| Plant 1 Avondale | Arizona Materials | Maricopa County, AZ | Construction sand and gravel | 10 | 21 |
| Mine #3 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 4 | 21 |
| Belmont Pit | Custom Landscape Materials LLC | Maricopa County, AZ | Sand, common | 3 | 21 |
| Mesa Mine | Red Mountain Mining, Inc. | Maricopa County, AZ | Crushed, broken granite | 7 | 19 |
| Fort McDowell Yavapai Materials-Plt #3 | Fort Mc Dowell Yavapai Materials | Maricopa County, AZ | Construction sand and gravel | 6 | 19 |
| Maxus1 | Maxus Construction Materials LLC | Maricopa County, AZ | Construction sand and gravel | 6 | 17 |
| Vulture Mine | Vulture Peak Holding LLC | Maricopa County, AZ | Gold ore | 10 | 16 |
| New River Plant | CalPortland Company | Maricopa County, AZ | Construction sand and gravel | 11 | 15 |
| 1014 Eagle Mountain Quarry | Arcosa Aggregates West, LLC. | Maricopa County, AZ | Construction sand and gravel | 6 | 14 |
| Fisher Industries Plant 11 | Fisher Sand & Gravel Company | Maricopa County, AZ | Construction sand and gravel | 6 | 14 |
| Cemex-19th Ave | Cemex Construction Materials South LLC | Maricopa County, AZ | Construction sand and gravel | 29 | 12 |
| Madison Granite Pit | Madison Granite Supply Inc | Maricopa County, AZ | Crushed, broken granite | 17 | 12 |
| Dby Mining Buckeye Pit | Dby Mining, LLC | Maricopa County, AZ | Construction sand and gravel | 6 | 12 |
| Mine #10 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 0 | 12 |
| A B C Sand & Rock Inc | A B C Sand & Rock Inc | Maricopa County, AZ | Construction sand and gravel | 9 | 11 |
| Agg #1 | Premier Materials Group LLC | Maricopa County, AZ | Sand, common | 5 | 8 |
| Mine #1 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 3 | 8 |
| Mine #11 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 3 | 8 |
| 1046 Shaw | Arcosa Aggregates West, LLC. | Maricopa County, AZ | Construction sand and gravel | 4 | 7 |
| Avondale Plant | CalMat Co | Maricopa County, AZ | Construction sand and gravel | 0 | 7 |
| Pair a Dice | Premier Materials Group LLC | Maricopa County, AZ | Construction sand and gravel | 3 | 6 |
| Mine #4 | Superstition Crushing L.L.C. | Maricopa County, AZ | Construction sand and gravel | 0 | 6 |
| West Plant | CalMat Co | Maricopa County, AZ | Construction sand and gravel | 28 | 5 |
| Cemex, West Valley | Cemex Construction Materials South LLC | Maricopa County, AZ | Construction sand and gravel | 16 | 5 |
| 1015 Northern | Arcosa Aggregates West, LLC. | Maricopa County, AZ | Construction sand and gravel | 4 | 5 |
| Maxus04 | Maxus Construction Materials LLC | Maricopa County, AZ | Sand, common | 4 | 5 |
| Fisher Industries Plant #39 | Fisher Sand & Gravel Company | Maricopa County, AZ | Crushed, broken stone | 2 | 5 |
| Sun City Plant | CalMat Co | Maricopa County, AZ | Construction sand and gravel | 22 | 4 |
| Val Vista, Citrus Grove 150 | CalMat Co | Maricopa County, AZ | Construction sand and gravel | 6 | 4 |
| Buckeye Plant | Arizona Materials | Maricopa County, AZ | Construction sand and gravel | 0 | 4 |
| Premier Materials Group -1350 | Premier Materials Group LLC | Maricopa County, AZ | Sand, common | 4 | 3 |
| Plant 2 | Onyx Crushing AZ LLC | Maricopa County, AZ | Sand, common | 3 | 3 |
| 1051 Sun City Plant | Arcosa Aggregates West, LLC. | Maricopa County, AZ | Construction sand and gravel | 6 | 2 |
| Fisher Industries Plant #35 | Fisher Sand & Gravel Company | Maricopa County, AZ | Construction sand and gravel | 0 | 2 |
| CEMEX-Buckeye Ranch | Cemex Construction Materials South LLC | Maricopa County, AZ | Construction sand and gravel | 8 | 0 |
| Hassayampa Plant #46 | Martin Marietta Arizona, LLC | Maricopa County, AZ | Construction sand and gravel | 4 | 0 |
| Gila 240 | CalMat Co | Maricopa County, AZ | Construction sand and gravel | 0 | 0 |
| Smithco Portable | Smithco Ent Inc | Maricopa County, AZ | Construction sand and gravel | 0 | 0 |
| Portable Crusher No. 5 | Rango Inc. | Maricopa County, AZ | Sand, common | 0 | 0 |
| Portable Crusher No. 6 | Rango Inc. | Maricopa County, AZ | Sand, common | 0 | 0 |
| Highway 85 | CalMat Co | Maricopa County, AZ | Not stated | 0 | 0 |
| NR-1 | Custom Landscape Materials LLC | Maricopa County, AZ | Not stated | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 50 | 69.4% |
| Sand, common | 8 | 11.1% |
| Crushed, broken stone | 5 | 6.9% |
| Crushed, broken granite | 3 | 4.2% |
| Gold ore | 1 | 1.4% |
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 | 236 | 42 | $57,970 | 12 |
| 2023 | 291 | 62 | $121,511 | 17 |
| 2024 | 183 | 29 | $76,919 | 16 |
| 2025 | 175 | 45 | $86,075 | 10 |
| 2026 | 178 | 30 | $73,843 | 13 |
Standards cited most at mines in Maricopa 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 | 157 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 102 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 62 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 57 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 52 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 49 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 37 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 32 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 31 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 29 |
| 30 CFR 47.41 | Hazard communication | 24 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 22 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 21 |
Injury and illness cases at mines in Maricopa County, Arizona
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 53 |
| No lost time, or an occupational illness | 15 |
What the accident reports at mines in Maricopa County, Arizona describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 18 |
| Slip or fall of person | 18 |
| Handtools (nonpowered) | 14 |
| Machinery | 6 |
| Powered haulage | 5 |
| Other | 3 |
| Striking or bumping | 2 |
| Stepping or kneeling on object | 2 |
| Entrapment | 1 |
| Disorders (physical agents) | 1 |
Equipment named in accident reports at mines in Maricopa County, Arizona
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 14 |
| Front-end loader | 5 |
| Trucks | 4 |
| Ore haulage trucks - off highway trucks | 4 |
| Forklift | 3 |
| Hand tools (powered) | 3 |
| Shovel | 2 |
| Crusher | 2 |
| Screen | 1 |
| Bulldozer | 1 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. 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.