Key Takeaway

Azusa Rock is a active surface mine producing Stone, located in irwindale, Los Angeles County, CA. It has 55 violations on record (9 S&S) and $39K in proposed penalties. Operated by CalMat Co.

Azusa Rock

Active Surface Stone

Operator: CalMat Co

Controller: Vulcan Materials Company

Location: irwindale, Los Angeles County, CA

Employees: 12

55
Violations
9
S&S Violations
7
Accidents
$39K
Penalties

Recent Violations

View all 55 →
Date Section S&S Negligence Penalty
03/10/2025 56.16001 Non-S&S LowNegligence $151
03/10/2025 56.14132(a) S&S ModNegligence $818
01/04/2024 46.11(b)(6) S&S LowNegligence $397
10/16/2023 50.30(a) Non-S&S HighNegligence $147
07/16/2023 50.30(a) Non-S&S HighNegligence $147
04/16/2023 50.30(a) Non-S&S HighNegligence $143
01/16/2023 50.30(a) Non-S&S HighNegligence $143
10/16/2022 50.30(a) Non-S&S HighNegligence $143
03/27/2019 56.12004 Non-S&S ModNegligence $121
03/27/2019 46.11(b)(3) S&S ModNegligence $11,041
12/12/2017 56.14107(a) Non-S&S HighNegligence $2,487
08/10/2016 50.30(a) Non-S&S ModNegligence $235
12/10/2015 56.4200(b)(2) Non-S&S LowNegligence $362
04/14/2015 56.14107(a) Non-S&S ModNegligence $540
07/16/2014 50.30(a) Non-S&S LowNegligence $100
12/31/2013 56.14100(c) S&S LowNegligence $5,503
12/31/2013 56.14132(b)(1)(i) S&S LowNegligence $12,248
12/31/2013 56.14107(a) Non-S&S ModNegligence $100
03/17/2011 56.1000 Non-S&S LowNegligence $100
04/13/2010 56.4201(a)(1) Non-S&S ModNegligence $100

Accidents & Injuries

View all 7 →
Date Classification Injury Days Lost
03/26/2023 HANDLING OF MATERIALS DAYS RESTRICTED ACTIVITY ONLY 35d restricted
07/16/2018 POWERED HAULAGE NO DYS AWY FRM WRK,NO RSTR ACT None
07/10/2014 HANDTOOLS (NONPOWERED) NO DYS AWY FRM WRK,NO RSTR ACT None
07/08/2014 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 23d restricted
10/10/2002 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 5d restricted
08/17/2001 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 1d lost, 2d restricted
08/16/2000 DISORDERS (REPEATED TRAUMA) OCCUPATNAL ILLNESS NOT DEG 1-6 24d lost, 75d restricted

Inspections

View all 57 →
Begin End Hours Inspectors
11/04/2025 11/12/2025 45.00 1
04/29/2025 04/29/2025 10.00 1
03/10/2025 03/10/2025 11.50 1
05/15/2024 05/16/2024 26.00 1
01/03/2024 01/05/2024 22.25 1
07/05/2023 07/06/2023 13.50 1
05/17/2023 05/17/2023 3.00 1
10/05/2022 10/07/2022 20.50 1
06/27/2022 06/29/2022 31.75 1
11/01/2021 11/03/2021 18.00 1

Mine Details

MSHA Mine ID0404674
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Stone NEC
Employees12
Days/Week5.0
Hours/Shift8.0
Coordinates34.1561110, -117.9247220
Nearest Townirwindale

Frequently Asked Questions

How many MSHA violations does Azusa Rock have?

Azusa Rock has 55 MSHA violations on record, of which 9 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $39K.

What type of mine is Azusa Rock?

Azusa Rock is a Surface mine producing Stone, located in irwindale, Los Angeles County, CA. It currently has 12 employees.

Has anyone been injured or killed at Azusa Rock?

According to MSHA records, Azusa Rock has 7 reported accident/injury records and 0 fatalities on file.

Who operates Azusa Rock?

Azusa Rock is operated by CalMat Co and controlled by Vulcan Materials Company. MSHA Mine ID: 0404674.