Data / Mines / California / Lake Herman Quarry
Lake Herman Quarry: 14 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Lake Herman Quarry is an active crushed, broken stone surface mine in Solano County, California, operated by CalMat Co with 68 employees on MSHA's record (mine ID 0400726). Since January 1, 2022 MSHA inspectors issued 14 citations and orders there with $2,459 in proposed penalties, and 3 accident reports were filed there, with 2 injury or illness cases.
The request: Watch Lake Herman Quarry (MSHA mine ID 0400726) in Solano County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0400726
- Status
- Active since August 20, 1974
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Solano County, California
- Nearest town
- Vallejo
- Operator
- CalMat Co
- Parent company
- Vulcan Materials Company
- Employees
- 68
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 14
- Significant and substantial
- 1 (7.1%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $2,459
- Amount paid so far
- $2,459
- Inspections
- 14
- Inspector hours on site
- 98
- Citations per inspection
- 1.00 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 2
- Fatalities
- 0
- Latest MSHA record
- July 20, 2026
- Citations issued to contractors here
- 1 ($151 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 | 3 | 1 | $829 | 0 |
| 2023 | 6 | 0 | $858 | 0 |
| 2024 | 0 | 0 | $0 | 2 |
| 2025 | 2 | 0 | $319 | 0 |
| 2026 | 3 | 0 | $453 | 0 |
Standards cited most at Lake Herman Quarry
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 | 2 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.7 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14105 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16003 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Lake Herman Quarry
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
What the accident reports at Lake Herman Quarry describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Other | 1 |
| Slip or fall of person | 1 |
| Machinery | 1 |
Equipment named in accident reports at Lake Herman Quarry
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Shovel | 1 |
Other open mines in Solano County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Lind Marine Incorporated | Lind Marine Incorporated | Solano County, CA | Misc. nonmetallic mnls. | 3 | 23 |
| Decker Island | Dutra Materials | Solano County, CA | Construction sand and gravel | 8 | 11 |
| State Pit | Asta Construction Company Inc | Solano County, CA | Construction sand and gravel | 3 | 4 |
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.