Data / Mines / Arizona / Spencer Material (Hayhook)
Spencer Material (Hayhook): 10 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Spencer Material (Hayhook) is a temporarily idled construction sand and gravel surface mine in Pima County, Arizona, operated by Spencer Construction with 0 employees on MSHA's record (mine ID 0203460). Since January 1, 2022 MSHA inspectors issued 10 citations and orders there with $1,728 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Spencer Material (Hayhook) (MSHA mine ID 0203460) in Pima County, Arizona: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0203460
- Status
- Temporarily Idled since September 22, 2026
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Pima County, Arizona
- Nearest town
- Tucson
- Operator
- Spencer Construction
- Employees
- 0
- MSHA field office
- Mesa South AZ Field Office
- Citations and orders since January 1, 2022
- 10
- Significant and substantial
- 2 (20.0%)
- Closure orders
- 1
- High negligence or reckless
- 1
- Proposed penalties
- $1,728
- Amount paid so far
- $1,728
- Inspections
- 7
- Inspector hours on site
- 12
- Citations per inspection
- 1.43 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- September 22, 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 |
|---|---|---|---|---|
| 2024 | 10 | 2 | $1,728 | 0 |
Standards cited most at Spencer Material (Hayhook)
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 56.14110 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 45.4 | Part 45 | 1 |
| 30 CFR 56.9100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.8 | Training at sand, gravel and surface stone mines | 1 |
Other open mines in Pima County, Arizona
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Mission/san Xavier/eisenhower | Asarco LLC, a Delaware Limited Liability Company | Pima County, AZ | Copper ore | 447 | 256 |
| Rillito Plant | CalPortland Company | Pima County, AZ | Cement | 150 | 58 |
| Silver Bell | Rock Pros USA | Pima County, AZ | Dimension stone | 3 | 46 |
| Silver Bell Mining LLC | Asarco LLC, a Delaware Limited Liability Company | Pima County, AZ | Copper ore | 182 | 38 |
| Tanks Wilmot Landfill | Outlaw Excavating LLC | Pima County, AZ | Construction sand and gravel | 2 | 37 |
| Santa Rita Plan | Cimbar Resources | Pima County, AZ | Crushed, broken limestone | 17 | 19 |
| Marana Plant | CalMat Co | Pima County, AZ | Construction sand and gravel | 14 | 19 |
| Swan Pit | Granite Construction Company | Pima County, AZ | Construction sand and gravel | 17 | 16 |
| Amrize Sand Crusher #2 | Aggregate Industries SWR, Inc. | Pima County, AZ | Construction sand and gravel | 4 | 13 |
| Orange Grove | CalPortland Company | Pima County, AZ | Construction sand and gravel | 16 | 11 |
| Rillito Quarry | CalPortland Company | Pima County, AZ | Crushed, broken stone | 23 | 10 |
| Copper World LLC | Copper World | Pima County, AZ | Copper ore | 52 | 9 |
| River Road Plant | Churchman Sand and Gravel LLC | Pima County, AZ | Construction sand and gravel | 4 | 9 |
| Twin Peaks Aggregate | CalPortland Company | Pima County, AZ | Construction sand and gravel | 6 | 7 |
| Fraguita Mill Site | GoodMark Capital Group Inc. | Pima County, AZ | Gold ore | 4 | 5 |
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.