Sunol Aggregates
Active
Surface
SandAndGravel
Operator: Mission Valley Rock, LLC
Controller: Martin Marietta Materials Inc
Location: sunol, Alameda County, CA
Employees: 19
387
Violations
90
S&S Violations
50
Accidents
$223K
Penalties
Recent Violations
View all 387 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 10/22/2025 | 56.12004 | Non-S&S | LowNegligence | $818 |
| 06/02/2025 | 56.4201(a)(2) | Non-S&S | LowNegligence | $245 |
| 01/22/2025 | 56.12032 | Non-S&S | ModNegligence | $1,818 |
| 01/22/2025 | 56.14107(a) | Non-S&S | ModNegligence | $1,818 |
| 01/22/2025 | 56.14107(a) | Non-S&S | ModNegligence | $818 |
| 01/22/2025 | 56.12004 | Non-S&S | LowNegligence | $818 |
| 01/22/2025 | 56.14107(a) | Non-S&S | ModNegligence | $818 |
| 01/21/2025 | 56.12032 | Non-S&S | ModNegligence | $1,818 |
| 01/21/2025 | 56.20003(a) | Non-S&S | ModNegligence | $549 |
| 01/21/2025 | 56.20003(a) | Non-S&S | ModNegligence | $549 |
| 01/21/2025 | 56.12032 | S&S | ModNegligence | $9,004 |
| 01/21/2025 | 56.14107(a) | Non-S&S | ModNegligence | $818 |
| 06/05/2024 | 56.11001 | Non-S&S | ModNegligence | $239 |
| 06/05/2024 | 56.11027 | Non-S&S | ModNegligence | $239 |
| 06/05/2024 | 56.12032 | Non-S&S | LowNegligence | $147 |
| 06/05/2024 | 56.18002(b) | Non-S&S | ModNegligence | $147 |
| 06/05/2024 | 46.9 | Non-S&S | LowNegligence | $147 |
| 05/30/2024 | 56.14107(a) | S&S | ModNegligence | $535 |
| 05/30/2024 | 56.11002 | Non-S&S | ModNegligence | $147 |
| 05/29/2024 | 56.14109 | Non-S&S | ModNegligence | $147 |
Accidents & Injuries
View all 50 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 06/17/2025 | OTHER | INJURIES DUE TO NATURAL CAUSES | None |
| 09/13/2022 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 02/06/2020 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 40d restricted |
| 09/12/2017 | OTHER | DAYS RESTRICTED ACTIVITY ONLY | 20d restricted |
| 06/29/2017 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 2d restricted |
| 11/01/2016 | MACHINERY | DAYS AWAY FROM WORK ONLY | 63d lost |
| 11/01/2016 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 164d lost |
| 04/22/2016 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 42d restricted |
| 02/16/2016 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 74d lost, 29d restricted |
| 08/27/2013 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 100 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/28/2026 | 01/29/2026 | 9.75 | 1 |
| 10/22/2025 | 10/28/2025 | 23.75 | 1 |
| 08/21/2025 | 08/21/2025 | 4.75 | 1 |
| 07/21/2025 | 07/22/2025 | 14.50 | 1 |
| 07/21/2025 | 07/22/2025 | 12.00 | 1 |
| 06/02/2025 | 06/04/2025 | 17.50 | 1 |
| 01/21/2025 | 01/23/2025 | 26.50 | 1 |
| 07/15/2024 | 07/15/2024 | 2.25 | 1 |
| 06/17/2024 | 06/18/2024 | 4.50 | 1 |
| 05/28/2024 | 06/06/2024 | 45.25 | 1 |
Mine Details
MSHA Mine ID0401859
Mine TypeSurface
StatusActive
CommoditySandAndGravel
SIC DescriptionConstruction Sand and Gravel
Employees19
Days/Week5.0
Hours/Shift1.0
Coordinates37.5758330, -121.8802780
Nearest Townsunol
Related Mines
Eliot Plant
Pleasanton, Alameda County, CA
540 violations
Active
Pleasanton Plant
PLEASANTON, Alameda County, CA
309 violations
Active
DeSilva Gates Aggregates
SUNOL, Alameda County, CA
242 violations
Active
Tidewater Oakland Marine Aggregate
Oakland, Alameda County, CA
58 violations
Active
Sheridan Quarry
Fremont, Alameda County, CA
55 violations
Active
DQA Dumbarton Quarry
Fremont, Alameda County, CA
30 violations
Abandoned
San Francisco Sand
San Francisco, San Francisco County, CA
28 violations
Abandoned
DQA La Vista Quarry
Hayward, Alameda County, CA
27 violations
Abandoned
Frequently Asked Questions
How many MSHA violations does Sunol Aggregates have?
Sunol Aggregates has 387 MSHA violations on record, of which 90 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $223K.
What type of mine is Sunol Aggregates?
Sunol Aggregates is a Surface mine producing SandAndGravel, located in sunol, Alameda County, CA. It currently has 19 employees.
Has anyone been injured or killed at Sunol Aggregates?
According to MSHA records, Sunol Aggregates has 50 reported accident/injury records and 0 fatalities on file.
Who operates Sunol Aggregates?
Sunol Aggregates is operated by Mission Valley Rock, LLC and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 0401859.