Data / Mines / Arizona / Coolidge Plant
Coolidge Plant, Pinal County, Arizona: 12 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Coolidge Plant is an active construction sand and gravel surface mine in Pinal County, Arizona, operated by Premier Materials Coolidge LLC with 9 employees on MSHA's record (mine ID 0203471). Since January 1, 2022 MSHA inspectors issued 12 citations and orders there with $1,523 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Coolidge Plant (MSHA mine ID 0203471) in Pinal County, Arizona: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0203471
- Status
- Active since March 12, 2026
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Pinal County, Arizona
- Nearest town
- Coolidge
- Operator
- Premier Materials Coolidge LLC
- Employees
- 9
- MSHA field office
- Mesa South AZ Field Office
- Citations and orders since January 1, 2022
- 12
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 2
- High negligence or reckless
- 1
- Proposed penalties
- $1,523
- Amount paid so far
- $1,523
- Inspections
- 10
- Inspector hours on site
- 43
- Citations per inspection
- 1.20 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- September 30, 2026
- Citations issued to contractors here
- 2 ($302 proposed)
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 |
|---|---|---|---|---|
| 2024 | 1 | 0 | $147 | 0 |
| 2025 | 4 | 0 | $470 | 0 |
| 2026 | 7 | 0 | $906 | 0 |
Standards cited most at Coolidge Plant
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 50.10 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 50.12 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.13011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.23003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.8 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14206 | Surface metal and nonmetal mines | 1 |
Other open mines in Pinal County, Arizona
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Crusher #1 | Rock Pros USA | Pinal County, AZ | Crushed, broken stone | 5 | 76 |
| Resolution Mine | Resolution Copper Mining LLC | Pinal County, AZ | Copper ore | 180 | 49 |
| Superior | Rock Pros USA | Pinal County, AZ | Crushed, broken granite | 14 | 39 |
| Fisher Industries Plant 3 | Fisher Sand & Gravel Company | Pinal County, AZ | Construction sand and gravel | 3 | 34 |
| Broccoli | Rock Pros USA | Pinal County, AZ | Construction sand and gravel | 2 | 32 |
| Reymert Mine | Gila Rock Products, LLC | Pinal County, AZ | Construction sand and gravel | 10 | 30 |
| Mine #8 | Superstition Crushing L.L.C. | Pinal County, AZ | Construction sand and gravel | 3 | 30 |
| Maricopa Pit | Gila River Sand & Gravel Corporation | Pinal County, AZ | Construction sand and gravel | 60 | 29 |
| P & P Materials LLC | P & P Materials LLC | Pinal County, AZ | Construction sand and gravel | 8 | 28 |
| Desert Queen | Desert Queen Quarry LLC | Pinal County, AZ | Lime | 4 | 28 |
| 1013 Coolidge | Arcosa Aggregates West, LLC. | Pinal County, AZ | Construction sand and gravel | 0 | 24 |
| Maxus3 | Maxus Construction Materials LLC | Pinal County, AZ | Construction sand and gravel | 4 | 19 |
| Santan Pit | Gila River Sand & Gravel Corporation | Pinal County, AZ | Construction sand and gravel | 83 | 17 |
| Omya Arizona | Omya Inc | Pinal County, AZ | Crushed, broken marble | 28 | 17 |
| Queen Creek Pit | M.R. Tanner Mining, Inc. | Pinal County, AZ | Construction sand and gravel | 4 | 16 |
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.