Mason City Plant
MSHA mine ID 1300095 · Cerro Gordo County, IA
- Operator
- Heidelberg Materials US Cement LLC
- Controller
- Heidelberg Materials AG
- Mine status
- Active since May 15, 1974
- Mine type
- Facility
- Primary commodity
- Cement
- Citations issued
- Dec 2, 2024 to Sep 28, 2026
Past 24 months at a glance
- Inspections
- 20
- Citations and orders
- 312
- Marked S&S by MSHA
- 62
- Assessed penalties
- $1,128,634
311 of 312 citations have an MSHA assessment so far, first proposed at $1,190,291. 0 are marked contested.
Citations by standard
The 30 CFR section MSHA cited, most cited first.
| Standard | Citations | Assessed |
|---|---|---|
| 56.20003(a) | 51 | $530,968 |
| 56.4102 | 26 | $50,234 |
| 56.14100(b) | 23 | $18,894 |
| 56.12004 | 19 | $96,386 |
| 56.14112(b) | 14 | $171,006 |
| 56.4201(a)(1) | 12 | $7,379 |
| 56.12032 | 10 | $19,509 |
| 56.11001 | 9 | $18,179 |
| 56.14107(a) | 9 | $40,360 |
| 56.11012 | 7 | $24,503 |
| 56.12019 | 7 | $5,377 |
| 56.14100(c) | 7 | $6,920 |
| 56.12018 | 6 | $7,825 |
| 56.14207 | 6 | $3,671 |
| 56.20011 | 6 | $4,587 |
| 56.4104(b) | 6 | $6,812 |
| 47.41(a) | 5 | $2,740 |
| 56.12028 | 5 | $5,255 |
| 56.20003(b) | 5 | $21,727 |
| 47.44(b) | 4 | $2,659 |
| 56.14112(a)(1) | 4 | $1,946 |
| 56.4201(b) | 4 | $2,449 |
| 56.5001(a)/56.5005 | 4 | $3,472 |
| 56.12008 | 3 | $2,502 |
| 56.14101(a)(2) | 3 | $1,343 |
Latest citations
| Issued | Assessed |
|---|---|
| Sep 28, 2026 No. 5114792 50.20(b) | Not yet assessed |
| Sep 4, 2026 No. 5220769 56.5001(a)/56.5005 | $1,219 Printed |
| Sep 4, 2026 No. 5220768 56.5001(a)/56.5005 | $1,219 Printed |
| Aug 26, 2026 No. 9763369 56.20003(a) | $2,133 Printed |
| Aug 26, 2026 No. 5220759 56.4201(a)(1) | $1,219 Printed |
| Aug 25, 2026 No. 5220758 56.20003(a) | $2,133 Printed |
| Aug 25, 2026 No. 5220757 56.20003(a) | $2,133 Printed |
| Aug 25, 2026 No. 5220756 56.20003(a) | $2,133 Printed |
| Aug 25, 2026 No. 5220755 56.20003(a) | $2,133 Printed |
| Aug 25, 2026 No. 5220754 56.14112(b) | $313 Printed |
| Aug 25, 2026 No. 5220753 56.20003(a) | $15,768 Printed |
| Aug 20, 2026 No. 9763367 56.14100(b) | $432 Printed |
| Aug 20, 2026 No. 9763366 56.14130(g) | $151 Closed |
| Aug 20, 2026 No. 9763365 56.14205 | $151 Printed |
| Aug 20, 2026 No. 5220752 56.4601 | $432 Printed |
| Aug 20, 2026 No. 5220751 56.14100(b) | $193 Printed |
| Aug 20, 2026 No. 5220750 56.20003(a) | $549 Printed |
| Aug 20, 2026 No. 5220749 56.12032 | $432 Printed |
| Aug 20, 2026 No. 5220748 56.14112(a)(1) | $288 Printed |
| Aug 20, 2026 No. 5220747 56.14112(a)(1) | $959 Printed |
| Aug 20, 2026 No. 5220746 56.20003(a) | $20,047 Printed |
| Aug 20, 2026 No. 5220745 56.20003(a) | $20,047 Printed |
| Aug 20, 2026 No. 5220744 56.14112(a)(1) | $432 Printed |
| Aug 20, 2026 No. 5220743 56.20003(a) | $20,047 Printed |
| Aug 20, 2026 No. 5220742 56.14112(a)(2) | $432 Printed |
Latest inspections
Compliance Follow-up Inspection
Event F04D3FF
Sep 28, 2026 to Sep 30, 2026
Regular Safety and Health Inspection
Event F02A784
Aug 3, 2026 to Sep 1, 2026
Compliance Follow-up Inspection
Event F03C246
May 5, 2026 to May 6, 2026
Non-Fatal Accident Investigation
Event F03F349
Apr 14, 2026 to May 26, 2026
103 (g) Written Notification Hazard Complaint Inspectio
Event F03F348
Apr 13, 2026 to Apr 16, 2026
Compliance Follow-up Inspection
Event F03C235
Apr 6, 2026
Compliance Follow-up Inspection
Event F02AF90
Mar 23, 2026 to Mar 25, 2026
Spot Inspection
Event F0370A0
Mar 12, 2026 to Mar 17, 2026
Verbal Hazard Complaint Inspections
Event F03709F
Mar 12, 2026 to Mar 17, 2026
Compliance Follow-up Inspection
Event F02AF86
Mar 3, 2026
Get an alert when MSHA cites Mason City Plant again
MineCitation checks MSHA data every day and emails new citations, S&S violations, penalties and ownership changes in the states and mine types you choose.
About this record
These figures come from public Mine Safety and Health Administration (MSHA) open government data on mines, inspections, violations and assessed violations. MineCitation copies them as published and does not add findings of its own.
A citation records a condition an MSHA inspector found. Operators can contest citations and penalties, and amounts can change after review. MineCitation is not legal advice.
See something that does not match MSHA's records? Email support@minecitation.com with the mine ID and we will check it against the source data.