Key Takeaway
Permanente Cement Plant & Quarry is a temporarily idled facility mine producing Stone, located in Cupertino, Santa Clara County, CA. It has 1,698 violations on record (346 S&S) and $2.8M in proposed penalties. Operated by Lehigh Southwest Cement Co..
Permanente Cement Plant & Quarry
Operator: Lehigh Southwest Cement Co.
Controller: Heidelberg Materials AG
Location: Cupertino, Santa Clara County, CA
Recent Violations
View all 1,698 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 10/23/2024 | 56.14101(a)(3) | Non-S&S | ModNegligence | $147 |
| 10/23/2024 | 56.14100(b) | Non-S&S | ModNegligence | $147 |
| 04/25/2024 | 50.30(a) | Non-S&S | LowNegligence | $147 |
| 02/08/2024 | 56.12018 | Non-S&S | ModNegligence | $147 |
| 02/08/2024 | 56.11001 | Non-S&S | ModNegligence | $204 |
| 02/08/2024 | 56.12032 | Non-S&S | LowNegligence | $147 |
| 02/08/2024 | 46.5 | S&S | ModNegligence | $504 |
| 02/07/2024 | 50.30(a) | Non-S&S | LowNegligence | $147 |
| 02/06/2024 | 56.20010 | Non-S&S | ModNegligence | $204 |
| 09/27/2023 | 56.14211(c) | S&S | LowNegligence | $346 |
| 09/27/2023 | 56.14211(c) | S&S | LowNegligence | $346 |
| 06/07/2023 | 56.20013 | Non-S&S | LowNegligence | $143 |
| 06/07/2023 | 56.12030 | S&S | ModNegligence | $439 |
| 06/07/2023 | 56.12020 | Non-S&S | ModNegligence | $198 |
| 06/07/2023 | 56.20010 | Non-S&S | LowNegligence | $143 |
| 03/14/2023 | 46.6 | Non-S&S | ModNegligence | $1,006 |
| 03/14/2023 | 56.14115(b) | Non-S&S | LowNegligence | $182 |
| 09/08/2022 | 56.20010 | Non-S&S | ModNegligence | $840 |
| 02/08/2022 | 56.4201(a)(2) | Non-S&S | ModNegligence | $407 |
| 01/16/2022 | 50.30(a) | Non-S&S | LowNegligence | $133 |
Accidents & Injuries
View all 197 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 09/27/2023 | FALLING/SLIDING/ROLLING MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 88d lost, 52d restricted |
| 02/08/2023 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 55d restricted |
| 02/16/2020 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 340d lost |
| 02/11/2020 | ELECTRICAL | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/07/2019 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/04/2019 | FIRE | ACCIDENT ONLY | None |
| 12/30/2017 | POWERED HAULAGE | FATALITY | Fatal |
| 12/01/2017 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/25/2017 | STRIKING OR BUMPING | DAYS RESTRICTED ACTIVITY ONLY | 80d restricted |
| 10/03/2017 | POWERED HAULAGE | DYS AWY FRM WRK & RESTRCTD ACT | 23d lost, 56d restricted |
Inspections
View all 218 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 08/13/2025 | 08/13/2025 | 5.00 | 1 |
| 06/17/2025 | 06/18/2025 | 2.00 | 1 |
| 03/27/2025 | 03/27/2025 | 5.75 | 1 |
| 11/06/2024 | 11/07/2024 | 4.50 | 1 |
| 10/23/2024 | 10/24/2024 | 13.75 | 1 |
| 08/23/2024 | 08/26/2024 | 0.50 | 1 |
| 05/03/2024 | 05/03/2024 | 7.50 | 1 |
| 03/25/2024 | 03/26/2024 | 5.00 | 1 |
| 02/28/2024 | 02/28/2024 | 7.25 | 1 |
| 02/07/2024 | 02/08/2024 | 18.75 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Permanente Cement Plant & Quarry have?
Permanente Cement Plant & Quarry has 1698 MSHA violations on record, of which 346 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $2.8M.
What type of mine is Permanente Cement Plant & Quarry?
Permanente Cement Plant & Quarry is a Facility mine producing Stone, located in Cupertino, Santa Clara County, CA. It currently has 0 employees.
Has anyone been injured or killed at Permanente Cement Plant & Quarry?
According to MSHA records, Permanente Cement Plant & Quarry has 197 reported accident/injury records and 1 fatalities on file.
Who operates Permanente Cement Plant & Quarry?
Permanente Cement Plant & Quarry is operated by Lehigh Southwest Cement Co. and controlled by Heidelberg Materials AG. MSHA Mine ID: 0404075.