Data / Mines / California / G3 Enterprises Byron Plant
G3 Enterprises Byron Plant: 44 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
G3 Enterprises Byron Plant is an active construction sand and gravel surface mine in Contra Costa County, California, operated by G3 Enterprises, Inc. with 21 employees on MSHA's record (mine ID 0401949). Since January 1, 2022 MSHA inspectors issued 44 citations and orders there with $14,106 in proposed penalties, and 4 accident reports were filed there, with 4 injury or illness cases.
The request: Watch G3 Enterprises Byron Plant (MSHA mine ID 0401949) in Contra Costa County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0401949
- Status
- Active since September 17, 1974
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Contra Costa County, California
- Nearest town
- Byron
- Operator
- G3 Enterprises, Inc.
- Employees
- 21
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 44
- Significant and substantial
- 3 (6.8%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $14,106
- Amount paid so far
- $13,804
- Inspections
- 20
- Inspector hours on site
- 98
- Citations per inspection
- 2.20 (all mines 2.30)
- Accident reports
- 4
- Injury and illness cases
- 4
- Fatalities
- 0
- Latest MSHA record
- August 21, 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 | 3 | 0 | $872 | 1 |
| 2023 | 5 | 0 | $1,672 | 1 |
| 2024 | 25 | 1 | $5,789 | 0 |
| 2025 | 9 | 2 | $5,471 | 1 |
| 2026 | 2 | 0 | $302 | 1 |
Standards cited most at G3 Enterprises Byron 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 | 12 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14109 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12034 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4130 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12020 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at G3 Enterprises Byron Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 3 |
| No lost time, or an occupational illness | 1 |
What the accident reports at G3 Enterprises Byron Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 1 |
| Slip or fall of person | 1 |
| Handtools (nonpowered) | 1 |
| Poisoning (toxic materials) | 1 |
Equipment named in accident reports at G3 Enterprises Byron Plant
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Hand tools (not powered) | 1 |
Other open mines in Contra Costa County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Clayton Aggregates | Martin Marietta Northern California Aggregates,LLC | Contra Costa County, CA | Crushed, broken stone | 15 | 15 |
| Clayton Plant | Cemex Construction Materials Pacific, LLC | Contra Costa County, CA | Crushed, broken stone | 14 | 15 |
| Kellog Creek Aggregates Inc | Kellog Creek Aggregates Inc | Contra Costa County, CA | Construction sand and gravel | 5 | 4 |
| Sand Merchant | Foss Maritime Company | Contra Costa County, CA | Sand, common | 12 | 2 |
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.