MINNESOTA MINING AND MANUFACTURING COMPANY
18750 MINNESOTA ROAD, CORONA, CA 92881
Having inspection records is common for businesses in regulated industries. Data and methodology
Inspection records
Jan 12, 2023#346435985Jan 12, 2023Planned (H) · Complete scope, Safety#346435985$7504 viol.4 violations$750 in penalties
Inspection #346435985
Dates
- Opened
- Jan 12, 2023
- Closing Conference Date
- Mar 6, 2023
- Final Order
- May 2, 2023
- Closed
- Jun 6, 2023
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 75
Violations and Penalties
- Total Violations
- 4
- Violation Types
- 4 other-than-serious
- Initial Penalties
- $750
- Penalties on Record
- $750
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (4 of 4 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 1670(B)(19) Personal Fall Arrest Systems, Personal Fall Restraint Systems and Positioning Devices | Other | 1 | 1 | $375 | $375 | Apr 4, 2023 | - | May 2, 2023 |
| 01002 | 7030(B) Conveyors | Other | 1 | 1 | $375 | $375 | Apr 4, 2023 | - | May 2, 2023 |
| 01003 | 4845(B) General Precautions | Other | 1 | 2 | $0 | $0 | Apr 4, 2023 | - | May 2, 2023 |
| 01004 | 4839(A)(8) Hose | Other | 1 | 2 | $0 | $0 | Apr 4, 2023 | - | May 2, 2023 |
Oct 12, 2020#344969332Oct 12, 2020Planned (H) · Complete scope, Safety#344969332$1,6354 viol.4 violations$1,635 in penalties
Inspection #344969332
Dates
- Opened
- Oct 12, 2020
- Closing Conference Date
- Mar 29, 2021
- Final Order
- Apr 28, 2021
- Closed
- May 4, 2021
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 74
Violations and Penalties
- Total Violations
- 4
- Violation Types
- 4 other-than-serious
- Initial Penalties
- $1,635
- Penalties on Record
- $1,635
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (4 of 4 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 2340.16 Work Space About Electric Equipment OSHA citation code: 23400016 C | Other | 1 | 2 | $210 | $210 | Apr 30, 2021 | - | Apr 28, 2021 |
| 01002 | 4650(E) Storage, Handling, and Use of Cylinders | Other | 3 | 2 | $475 | $475 | Apr 23, 2021 | - | Apr 28, 2021 |
| 01003 | 4650(F) Storage, Handling, and Use of Cylinders | Other | 1 | 2 | $475 | $475 | Apr 23, 2021 | - | Apr 28, 2021 |
| 01004 | 4650(H) Storage, Handling, and Use of Cylinders | Other | 1 | 2 | $475 | $475 | Apr 23, 2021 | - | Apr 28, 2021 |
Aug 10, 2020#344946454Aug 10, 2020Complaint (B) · No Inspection scope, Safety#344946454$00 viol.0 violations$0 in penalties
Inspection #344946454
Dates
- Opened
- Aug 10, 2020
- Closing Conference Date
- Sep 29, 2020
- Closed
- Oct 1, 2020
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 65
- Related Activity
- 1 complaint
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Complaint Inspection: This inspection record is categorized as a complaint inspection in the DOL OSHA enforcement data. OSHA can open complaint-driven inspections after receiving safety or health complaints from workers or their representatives.
Apr 10, 2019#343927570Apr 10, 2019Planned (H) · Complete scope, Safety#343927570$1,2003 viol.3 violations$1,200 in penalties
Inspection #343927570
Dates
- Opened
- Apr 10, 2019
- Closing Conference Date
- Apr 25, 2019
- Final Order
- May 20, 2019
- Closed
- Jun 3, 2019
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 74
Violations and Penalties
- Total Violations
- 3
- Violation Types
- 3 other-than-serious
- Initial Penalties
- $1,200
- Penalties on Record
- $1,200
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (3 of 3 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 4649(D) Construction and Marking of Cylinders | Other | 1 | 1 | $300 | $300 | May 15, 2019 | - | May 20, 2019 |
| 01002 | 4650(D) Storage, Handling, and Use of Cylinders | Other | 1 | 3 | $300 | $300 | - | May 20, 2019 | |
| 01003 | 4851(E)(2) Arc Welding and Cutting | Other | 1 | 3 | $600 | $600 | - | May 20, 2019 |
May 30, 2018#343193363May 30, 2018Planned (H) · Complete scope, Safety#343193363$18,45012 viol.12 violations$18,450 in penalties
Inspection #343193363
Dates
- Opened
- May 30, 2018
- Closing Conference Date
- Nov 26, 2018
- Contested
- Jan 18, 2019
- Final Order
- Jun 12, 2019
- Closed
- Aug 26, 2019
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 57
Violations and Penalties
- Total Violations
- 12
- Violation Types
- 1 serious, 11 other-than-serious
- Initial Penalties
- $33,050
- Penalties on Record
- $18,450
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (5 of 12 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01002 | 3314(G)(2)(A) The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including Lockout/Tagout | Other | 1 | 1 | $1,000 | $0 | Dec 6, 2018 | Jan 18, 2019 | Jun 12, 2019 |
| 01003 | 3328(D) Machinery and Equipment | Other | 2 | 2 | $300 | $300 | Dec 4, 2018 | - | Dec 20, 2018 |
| 01004 | 3702(K) Transporting Employees | Other | 1 | 1 | $300 | $300 | Nov 29, 2018 | - | Dec 20, 2018 |
| 01005 | 5045(E)(3) Wire Rope Slings | Other | 1 | 1 | $450 | $450 | Nov 29, 2018 | - | Dec 20, 2018 |
| 01006 | 5048(I)(3) Synthetic Web Slings | Other | 1 | 1 | $450 | $450 | Nov 29, 2018 | - | Dec 20, 2018 |
Showing the 5 violations listed first by citation identifier. This inspection has 12 total violations documented in the U.S. Department of Labor OSHA enforcement database. The complete violation list is available at enforcedata.dol.gov.
May 15, 2017#342330156May 15, 2017Planned (H) · Complete scope, Safety#342330156$6003 viol.3 violations$600 in penalties
Inspection #342330156
Dates
- Opened
- May 15, 2017
- Closing Conference Date
- Jun 12, 2017
- Final Order
- Jul 12, 2017
- Closed
- Jul 17, 2017
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 73
Violations and Penalties
- Total Violations
- 3
- Violation Types
- 3 other-than-serious
- Initial Penalties
- $600
- Penalties on Record
- $600
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (3 of 3 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3212(A)(2)(A) Floor Openings, Floor Holes, Skylights and Roofs | Other | 2 | 1 | $225 | $225 | - | Jul 12, 2017 | |
| 01002 | 5A0001 General Duty Clause, Section 5(a)(1) | Other | 1 | 1 | $225 | $225 | - | Jul 12, 2017 | |
| 01003 | 3277(F) Fixed Ladders | Other | 1 | 1 | $150 | $150 | - | Jul 12, 2017 |
Mar 29, 2016#341367613Mar 29, 2016Planned (H) · Complete scope, Safety#341367613$6003 viol.3 violations$600 in penalties
Inspection #341367613
Dates
- Opened
- Mar 29, 2016
- Closing Conference Date
- Jul 25, 2016
- Contested
- Aug 12, 2016
- Final Order
- Sep 20, 2017
- Closed
- Nov 6, 2017
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 75
Violations and Penalties
- Total Violations
- 3
- Violation Types
- 3 other-than-serious
- Initial Penalties
- $5,775
- Penalties on Record
- $600
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (3 of 3 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3273(A) Working Area | Other | 1 | 1 | $225 | $0 | - | Aug 22, 2017 | |
| 01002 | 3366(A) Washing Facilities | Other | 2 | 2 | $150 | $0 | Aug 12, 2016 | Aug 12, 2016 | Sep 20, 2017 |
| 02001 | 3210(A) Guardrails at Elevated Locations | Other | 1 | 1 | $5,400 | $600 | Aug 12, 2016 | Sep 20, 2017 |
Dec 18, 2014#340148667Dec 18, 2014Planned (H) · Complete scope, Safety#340148667$3001 viol.1 violation$300 in penalties
Inspection #340148667
Dates
- Opened
- Dec 18, 2014
- Closing Conference Date
- Jan 13, 2015
- Final Order
- Feb 13, 2015
- Closed
- Jan 29, 2016
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 74
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $300
- Penalties on Record
- $300
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 2340.22 Identification of Equipment OSHA citation code: 23400022 C | Other | 2 | 1 | $300 | $300 | Feb 3, 2015 | - | Feb 13, 2015 |
Jul 11, 2012#315983023Jul 11, 2012Planned (H) · Complete scope, Safety#315983023$2251 viol.1 violation$225 in penalties
Inspection #315983023
Dates
- Opened
- Jul 11, 2012
- Closing Conference Date
- Jul 19, 2012
- Closed
- Sep 13, 2012
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 90
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $225
- Penalties on Record
- $225
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- 212313 Crushed and Broken Granite Mining and Quarrying
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3212 Floor Openings, Floor Holes, Skylights and Roofs OSHA citation code: 3212 A02 | Other | 1 | 1 | $225 | $225 | Jul 25, 2012 | - | - |
Apr 24, 2001#126049055Apr 24, 2001Planned (H) · Complete scope, Safety#126049055$3752 viol.2 violations$375 in penalties
Inspection #126049055
Dates
- Opened
- Apr 24, 2001
- Closing Conference Date
- Apr 27, 2001
- Closed
- Jun 5, 2001
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 120
Violations and Penalties
- Total Violations
- 2
- Violation Types
- 2 other-than-serious
- Initial Penalties
- $375
- Penalties on Record
- $375
- Site Address
- 18750 Minnesota Road, Corona, CA 92881
- Industry
- Not classified in OSHA's inspection record.
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (2 of 2 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 7010 Loading, Hauling, and Dumping--General OSHA citation code: 7010 A | Other | 1 | 2 | $225 | $225 | May 30, 2001 | - | - |
| 01002 | 7055 Fire Prevention and Control OSHA citation code: 7055 K | Other | 4 | 1 | $150 | $150 | May 23, 2001 | - | - |
Penalty amounts may differ from final amounts after settlement or judicial review. How to read these records
About these records
A company page groups inspections with the same normalized employer name, city and state; it is not a legal-entity identifier (how pages are grouped).
This page displays public OSHA enforcement data. Status text follows the DOL inspection record first and may include citation-level context when the inspection feed and citation records are out of sync. Penalty amounts shown reflect the latest penalty amounts on record in the DOL database and may differ from initial assessments or final amounts. This is not an official OSHA resource.
OSHA's public enforcement data does not publish a "guilty" or "not guilty" field for inspections. The closest outcome fields available are the citation counts, penalty amounts, contest dates, final-order dates, and the inspection close date shown on this page. How to interpret these status fields. How initial and current penalties are recorded.
OSHA may publish multiple citation rows in the same inspection with the same standard and penalty fields. Separate rows can still differ in OSHA metadata such as citation identifier, recorded instance count, exposed workers, or gravity value. Contest and Final Order columns show citation-level dates from OSHA's enforcement record. A dash means OSHA's record does not currently show that activity for the citation.
Understanding These Penalties
The maximum penalty for a serious violation in 2025 is $16,550 per violation. For willful violations, the range is $11,823 to $165,514. The current penalty column shows the latest amount on record in OSHA's database for each citation. When the current penalty differs from the initial penalty, OSHA's records show that the amount changed during the enforcement process, but this page does not determine the specific reason for each change. Penalty amounts are set by OSHA and adjusted annually for inflation.
10 inspections, 2001 to 2023. Each row is one inspection; point at or tap a row for its dates and totals.
Source: DOL OSHA enforcement data (inspections and violations), linked via activity_nr (exact government key).
Penalty changes: Amounts shown reflect what OSHA's enforcement record publishes. The reason for any change is not stated unless OSHA's record explicitly says so.
Short cases: When a case closed soon after it opened, the closed marker is drawn slightly to the right so both markers stay visible. Each row's card shows the exact dates.