Key Takeaway

Riverside Operation is a active facility mine producing Nonmetal, located in Riverside, Riverside County, CA. It has 31 violations on record (9 S&S) and $4K in proposed penalties. Operated by Riverside Milling Company, LLC.

Riverside Operation

Active Facility Nonmetal

Operator: Riverside Milling Company, LLC

Controller: P W Gillibrand Company Inc

Location: Riverside, Riverside County, CA

Employees: 4

31
Violations
9
S&S Violations
2
Accidents
$4K
Penalties

Recent Violations

View all 31 →
Date Section S&S Negligence Penalty
01/16/2023 50.30(a) Non-S&S HighNegligence $143
10/27/2015 56.12032 Non-S&S ModNegligence $100
07/01/2015 56.12030 Non-S&S ModNegligence $100
02/26/2013 56.20011 Non-S&S ModNegligence $100
01/04/2012 56.4402 Non-S&S ModNegligence $100
01/04/2012 56.14112(a)(1) S&S ModNegligence $207
11/24/2009 56.14112(b) S&S ModNegligence $807
06/30/2009 56.12026 Non-S&S LowNegligence $100
02/18/2009 56.12028 S&S ModNegligence $460
02/18/2009 56.14100(b) Non-S&S ModNegligence $100
02/17/2009 56.14107(a) Non-S&S ModNegligence $100
02/17/2009 56.12008 Non-S&S ModNegligence $100
05/29/2008 56.15004 S&S ModNegligence $207
10/17/2007 56.12004 Non-S&S ModNegligence $100
10/17/2007 56.12025 S&S ModNegligence $425
10/17/2007 56.12018 Non-S&S ModNegligence $100
10/16/2007 56.14112(a)(1) Non-S&S ModNegligence $100
05/22/2006 56.12004 Non-S&S ModNegligence $60
10/25/2004 Non-S&S $0
10/25/2004 56.15005 S&S ModNegligence $207

Accidents & Injuries

View all 2 →
Date Classification Injury Days Lost
09/14/2011 DUST DISEASE OF LUNGS OCCUPATNAL ILLNESS NOT DEG 1-6 None
02/07/2011 HANDTOOLS (NONPOWERED) DAYS AWAY FROM WORK ONLY 315d lost

Inspections

View all 58 →
Begin End Hours Inspectors
11/03/2025 11/05/2025 24.25 1
07/02/2025 07/02/2025 5.00 1
03/10/2025 03/10/2025 3.00 1
07/30/2024 07/30/2024 9.75 1
02/15/2024 02/15/2024 8.00 1
08/30/2023 08/30/2023 1.25 1
08/29/2023 08/30/2023 12.00 1
10/26/2022 10/26/2022 12.00 1
07/08/2022 07/08/2022 6.00 1
01/13/2022 01/14/2022 10.25 1

Mine Details

MSHA Mine ID0404263
Mine TypeFacility
StatusActive
CommodityNonmetal
SIC DescriptionGround Silica
Employees4
Days/Week5.0
Hours/Shift8.0
Coordinates34.0169440, -117.3961110
Nearest TownRiverside

Frequently Asked Questions

How many MSHA violations does Riverside Operation have?

Riverside Operation has 31 MSHA violations on record, of which 9 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $4K.

What type of mine is Riverside Operation?

Riverside Operation is a Facility mine producing Nonmetal, located in Riverside, Riverside County, CA. It currently has 4 employees.

Has anyone been injured or killed at Riverside Operation?

According to MSHA records, Riverside Operation has 2 reported accident/injury records and 0 fatalities on file.

Who operates Riverside Operation?

Riverside Operation is operated by Riverside Milling Company, LLC and controlled by P W Gillibrand Company Inc. MSHA Mine ID: 0404263.