Key Takeaway
Whale Rock Quarry is a active surface mine producing Stone, located in Cayucos, San Luis Obispo County, CA. It has 76 violations on record (20 S&S) and $10K in proposed penalties. Operated by Negranti & Sons.
Whale Rock Quarry
Operator: Negranti & Sons
Controller: Nicholas E Negranti
Location: Cayucos, San Luis Obispo County, CA
Employees: 5
Recent Violations
View all 76 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 06/04/2025 | 56.14107(a) | S&S | LowNegligence | $151 |
| 07/24/2024 | 56.14130(g) | S&S | LowNegligence | $172 |
| 07/24/2024 | 56.14107(a) | Non-S&S | LowNegligence | $147 |
| 05/16/2023 | 56.12004 | Non-S&S | ModNegligence | $143 |
| 05/16/2023 | 56.14206(b) | Non-S&S | ModNegligence | $143 |
| 01/04/2023 | 56.4603(b) | Non-S&S | LowNegligence | $252 |
| 01/04/2023 | 56.4101 | Non-S&S | ModNegligence | $558 |
| 04/07/2022 | 56.9300(a) | Non-S&S | ModNegligence | $133 |
| 04/07/2022 | 56.12008 | Non-S&S | LowNegligence | $133 |
| 01/25/2022 | 56.14207 | Non-S&S | ModNegligence | $133 |
| 08/11/2021 | 56.14107(a) | S&S | ModNegligence | $328 |
| 08/11/2021 | 56.11027 | S&S | ModNegligence | $328 |
| 08/11/2021 | 56.14107(a) | Non-S&S | ModNegligence | $125 |
| 08/11/2021 | 56.14107(a) | Non-S&S | ModNegligence | $125 |
| 08/11/2021 | 56.9301 | S&S | ModNegligence | $328 |
| 08/11/2021 | 56.14207 | Non-S&S | ModNegligence | $125 |
| 08/11/2021 | 56.11027 | Non-S&S | LowNegligence | $125 |
| 10/16/2020 | 50.30(a) | Non-S&S | LowNegligence | $125 |
| 09/01/2020 | 56.12025 | Non-S&S | ModNegligence | $123 |
| 03/11/2020 | 56.12028 | Non-S&S | ModNegligence | $123 |
Accidents & Injuries
View all 1 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 03/30/2016 | MACHINERY | DAYS RESTRICTED ACTIVITY ONLY | 1d restricted |
Inspections
View all 50 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 06/03/2025 | 06/05/2025 | 32.00 | 1 |
| 11/21/2024 | 11/21/2024 | 17.00 | 1 |
| 07/30/2024 | 07/30/2024 | 3.00 | 1 |
| 07/24/2024 | 07/24/2024 | 6.50 | 1 |
| 02/15/2024 | 02/15/2024 | 14.25 | 1 |
| 05/15/2023 | 05/16/2023 | 17.00 | 1 |
| 01/03/2023 | 01/05/2023 | 27.00 | 1 |
| 04/06/2022 | 04/08/2022 | 18.50 | 1 |
| 01/24/2022 | 01/25/2022 | 14.00 | 1 |
| 08/11/2021 | 08/19/2021 | 18.75 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Whale Rock Quarry have?
Whale Rock Quarry has 76 MSHA violations on record, of which 20 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $10K.
What type of mine is Whale Rock Quarry?
Whale Rock Quarry is a Surface mine producing Stone, located in Cayucos, San Luis Obispo County, CA. It currently has 5 employees.
Has anyone been injured or killed at Whale Rock Quarry?
According to MSHA records, Whale Rock Quarry has 1 reported accident/injury records and 0 fatalities on file.
Who operates Whale Rock Quarry?
Whale Rock Quarry is operated by Negranti & Sons and controlled by Nicholas E Negranti. MSHA Mine ID: 0404635.