Data / Mines / Massachusetts / Onyx Sterling Pit
Onyx Sterling Pit: 48 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Onyx Sterling Pit is an active crushed, broken stone surface mine in Worcester County, Massachusetts, operated by Onyx Corporation with 6 employees on MSHA's record (mine ID 1901284). Since January 1, 2022 MSHA inspectors issued 48 citations and orders there with $265,323 in proposed penalties, and 4 accident reports were filed there, with 4 injury or illness cases, 1 of them fatal.
The request: Watch Onyx Sterling Pit (MSHA mine ID 1901284) in Worcester County, Massachusetts: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 1901284
- Status
- Active since March 11, 2021
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Worcester County, Massachusetts
- Nearest town
- Sterling
- Operator
- Onyx Corporation
- Employees
- 6
- MSHA field office
- Portsmouth NH Field Office
- Citations and orders since January 1, 2022
- 48
- Significant and substantial
- 13 (27.1%)
- Closure orders
- 4
- High negligence or reckless
- 2
- Proposed penalties
- $265,323
- Amount paid so far
- $70,709
- Inspections
- 19
- Inspector hours on site
- 286
- Citations per inspection
- 2.53 (all mines 2.30)
- Accident reports
- 4
- Injury and illness cases
- 4
- Fatalities
- 1
- Latest MSHA record
- October 28, 2026
- Citations issued to contractors here
- 1 ($346 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 |
|---|---|---|---|---|
| 2022 | 4 | 0 | $734 | 0 |
| 2023 | 8 | 0 | $1,192 | 0 |
| 2024 | 28 | 10 | $18,129 | 1 |
| 2025 | 5 | 3 | $245,117 | 0 |
| 2026 | 3 | 0 | $151 | 3 |
Standards cited most at Onyx Sterling 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 56.9300 | Surface metal and nonmetal mines | 6 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 5 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.3200 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9301 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14103 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.8 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.5 | Training at sand, gravel and surface stone mines | 1 |
Injury and illness cases at Onyx Sterling Pit
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Fatality | 1 |
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 1 |
What the accident reports at Onyx Sterling Pit describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Falling/sliding/rolling materials | 1 |
| Slip or fall of person | 1 |
| Handling of materials | 1 |
| Fall of face/rib/pillar/side/highwall | 1 |
Equipment named in accident reports at Onyx Sterling Pit
| Equipment | Reports |
|---|---|
| Crusher | 1 |
| Shovel | 1 |
Other open mines in Worcester County, Massachusetts
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Worcester Sand & Stone | Worcester Sand & Stone | Worcester County, MA | Crushed, broken traprock | 17 | 57 |
| Keating Quarry and Mill | P J Keating Company | Worcester County, MA | Crushed, broken traprock | 28 | 43 |
| Milford Stone Company | Milford Quarry Corporation | Worcester County, MA | Construction sand and gravel | 1 | 40 |
| Ashworth Gravel and Stone | Eastland Partners Inc | Worcester County, MA | Construction sand and gravel | 9 | 31 |
| Blackstone Plant | Kimball Sand Company Inc | Worcester County, MA | Crushed, broken limestone | 9 | 30 |
| Northboro Plant | Kimball Sand Company Inc | Worcester County, MA | Construction sand and gravel | 8 | 23 |
| Portable Crusher #5 | Fay & Wright Excavating Inc | Worcester County, MA | Crushed, broken stone | 3 | 21 |
| Rawson Materials, Plant 9 | Rawson Materials | Worcester County, MA | Crushed, broken stone | 6 | 20 |
| Century Perkins | Century Aggregates Inc | Worcester County, MA | Crushed, broken traprock | 8 | 16 |
| Otter River Pit & Plant | W J Graves Construction Company Inc | Worcester County, MA | Construction sand and gravel | 5 | 15 |
| Dauphinais Concrete | Dauphinais Concrete | Worcester County, MA | Construction sand and gravel | 6 | 12 |
| Portable Plant | W J Graves Construction Company Inc | Worcester County, MA | Construction sand and gravel | 2 | 11 |
| Rawson Materials Plant # 10 | Rawson Materials | Worcester County, MA | Construction sand and gravel | 9 | 10 |
| R J Mc Donald Inc | R J Mc Donald Inc | Worcester County, MA | Construction sand and gravel | 1 | 10 |
| WBP Pit | Powell Stone & Gravel | Worcester County, MA | Construction sand and gravel | 2 | 9 |
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.