Data / Mines / Arizona / West Side Pit
West Side Pit, Maricopa County, Arizona: 31 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
West Side Pit is an active construction sand and gravel surface mine in Maricopa County, Arizona, operated by M.R. Tanner Mining, Inc. with 11 employees on MSHA's record (mine ID 0203107). Since January 1, 2022 MSHA inspectors issued 31 citations and orders there with $19,325 in proposed penalties, and 2 accident reports were filed there, with 1 injury or illness case.
The request: Watch West Side Pit (MSHA mine ID 0203107) 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
- 0203107
- Status
- Active since October 1, 2011
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Maricopa County, Arizona
- Nearest town
- Glendale
- Operator
- M.R. Tanner Mining, Inc.
- Employees
- 11
- MSHA field office
- Mesa North AZ Field Office
- Citations and orders since January 1, 2022
- 31
- Significant and substantial
- 10 (32.3%)
- Closure orders
- 5
- High negligence or reckless
- 7
- Proposed penalties
- $19,325
- Amount paid so far
- $19,325
- Inspections
- 17
- Inspector hours on site
- 104
- Citations per inspection
- 1.82 (all mines 2.30)
- Accident reports
- 2
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- June 5, 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 | 6 | 4 | $10,054 | 0 |
| 2023 | 13 | 2 | $4,846 | 0 |
| 2024 | 10 | 4 | $4,123 | 1 |
| 2026 | 2 | 0 | $302 | 0 |
Standards cited most at West Side Pit
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 56.20003 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.4603 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14109 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.13021 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4531 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14131 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.8 | Training at sand, gravel and surface stone mines | 1 |
Injury and illness cases at West Side Pit
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at West Side Pit describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 1 |
| Entrapment | 1 |
Equipment named in accident reports at West Side Pit
| Equipment | Reports |
|---|---|
| Bulldozer | 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 |
| 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 |
| 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.