Data / Mines / Arizona / Hillside Plant
Hillside Plant, Maricopa County, Arizona: 57 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Hillside Plant is an intermittent crushed, broken stone surface mine in Maricopa County, Arizona, operated by Kilauea Crushers Inc with 8 employees on MSHA's record (mine ID 0203116). Since January 1, 2022 MSHA inspectors issued 57 citations and orders there with $57,385 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Hillside Plant (MSHA mine ID 0203116) in Maricopa County, Arizona: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0203116
- Status
- Intermittent since October 24, 2025
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Maricopa County, Arizona
- Nearest town
- Morristown
- Operator
- Kilauea Crushers Inc
- Employees
- 8
- MSHA field office
- Mesa North AZ Field Office
- Citations and orders since January 1, 2022
- 57
- Significant and substantial
- 15 (26.3%)
- Closure orders
- 1
- High negligence or reckless
- 2
- Proposed penalties
- $57,385
- Amount paid so far
- $39,208
- Inspections
- 14
- Inspector hours on site
- 74
- Citations per inspection
- 4.07 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- March 20, 2026
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 | 6 | $9,784 | 0 |
| 2023 | 27 | 9 | $45,869 | 0 |
| 2024 | 1 | 0 | $280 | 0 |
| 2025 | 4 | 0 | $1,452 | 0 |
Standards cited most at Hillside 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 56.14107 | Surface metal and nonmetal mines | 17 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.44 | Hazard communication | 1 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12016 | Surface metal and nonmetal mines | 1 |
Other open mines in Maricopa County, Arizona
| 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 |
| 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 |
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.