Key Takeaway
Lake Herman Quarry is a active surface mine producing Stone, located in Vallejo, Solano County, CA. It has 100 violations on record (14 S&S) and $84K in proposed penalties. Operated by CalMat Co.
Lake Herman Quarry
Operator: CalMat Co
Controller: Vulcan Materials Company
Location: Vallejo, Solano County, CA
Employees: 68
Recent Violations
View all 100 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 05/28/2025 | 47.41(a)(1) | Non-S&S | ModNegligence | $151 |
| 05/28/2025 | 46.7(a) | Non-S&S | ModNegligence | $168 |
| 08/29/2023 | 56.20003(a) | Non-S&S | ModNegligence | $143 |
| 08/29/2023 | 56.16003 | Non-S&S | ModNegligence | $143 |
| 08/29/2023 | 56.9300(b) | Non-S&S | ModNegligence | $143 |
| 08/11/2023 | 56.14207 | Non-S&S | LowNegligence | $143 |
| 08/10/2023 | 56.14105 | Non-S&S | LowNegligence | $143 |
| 08/10/2023 | 56.14107(a) | Non-S&S | LowNegligence | $143 |
| 03/08/2022 | 56.14112(b) | Non-S&S | ModNegligence | $133 |
| 03/07/2022 | 56.20011 | S&S | ModNegligence | $563 |
| 03/07/2022 | 56.20003(a) | Non-S&S | ModNegligence | $133 |
| 11/22/2021 | Non-S&S | $0 | ||
| 06/02/2021 | 56.13001 | Non-S&S | ModNegligence | $125 |
| 05/27/2021 | 56.11001 | Non-S&S | ModNegligence | $125 |
| 05/27/2021 | 56.11017 | Non-S&S | ModNegligence | $125 |
| 05/27/2021 | 56.12004 | Non-S&S | ModNegligence | $125 |
| 05/27/2021 | 56.14110 | Non-S&S | ModNegligence | $125 |
| 05/26/2021 | 56.6132(a)(3) | Non-S&S | ModNegligence | $125 |
| 05/26/2021 | 56.6132(a)(4) | Non-S&S | ModNegligence | $125 |
| 05/26/2021 | 56.6101(b) | Non-S&S | ModNegligence | $125 |
Accidents & Injuries
View all 48 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 09/30/2024 | MACHINERY | DYS AWY FRM WRK & RESTRCTD ACT | 29d lost, 123d restricted |
| 04/09/2024 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 9d restricted |
| 01/19/2023 | OTHER | INJURIES DUE TO NATURAL CAUSES | 52d lost |
| 11/22/2021 | FIRE | ACCIDENT ONLY | None |
| 03/15/2021 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 39d lost, 12d restricted |
| 12/15/2020 | POWERED HAULAGE | DYS AWY FRM WRK & RESTRCTD ACT | 9d lost, 5d restricted |
| 01/29/2020 | MACHINERY | DAYS RESTRICTED ACTIVITY ONLY | 17d restricted |
| 07/03/2019 | POWERED HAULAGE | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/13/2019 | OTHER | DYS AWY FRM WRK & RESTRCTD ACT | 1d lost, 44d restricted |
| 12/06/2018 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 1d lost |
Inspections
View all 70 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 10/01/2025 | 10/02/2025 | 22.75 | 1 |
| 07/10/2025 | 07/10/2025 | 4.50 | 1 |
| 05/27/2025 | 05/28/2025 | 14.25 | 1 |
| 01/30/2025 | 01/30/2025 | 6.50 | 1 |
| 07/30/2024 | 07/30/2024 | 6.00 | 1 |
| 02/12/2024 | 02/15/2024 | 12.00 | 1 |
| 08/29/2023 | 08/29/2023 | 10.25 | 1 |
| 08/10/2023 | 08/11/2023 | 16.00 | 2 |
| 01/19/2023 | 01/23/2023 | 17.75 | 1 |
| 09/13/2022 | 09/13/2022 | 10.75 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Lake Herman Quarry have?
Lake Herman Quarry has 100 MSHA violations on record, of which 14 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $84K.
What type of mine is Lake Herman Quarry?
Lake Herman Quarry is a Surface mine producing Stone, located in Vallejo, Solano County, CA. It currently has 68 employees.
Has anyone been injured or killed at Lake Herman Quarry?
According to MSHA records, Lake Herman Quarry has 48 reported accident/injury records and 1 fatalities on file.
Who operates Lake Herman Quarry?
Lake Herman Quarry is operated by CalMat Co and controlled by Vulcan Materials Company. MSHA Mine ID: 0400726.