MINE DETAILS
Patterson Mine and Mill
MSHA MINE ID3100274
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Patterson Mine and Mill35.25861, -81.34694Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
15,357reported employee hours
Tons per hour
0.00production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 3,452 | 0.00 | 7 | 1/1 mines reporting |
| 2025 Q2 | 0 | 3,325 | 0.00 | 6 | 1/1 mines reporting |
| 2025 Q3 | 0 | 2,411 | 0.00 | 6 | 1/1 mines reporting |
| 2025 Q4 | 0 | 1,771 | 0.00 | 6 | 1/1 mines reporting |
| 2026 Q1 | 0 | 2,059 | 0.00 | 6 | 1/1 mines reporting |
| 2026 Q2 | 0 | 2,339 | 0.00 | 7 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
61 significant & substantial (S&S)
Accident records
20 records classified as fatality
Proposed penalties · USD
849.005 of 6 violations with amounts
On-site inspection hours
39.506 inspections · 6 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 1 | 0 | 151.00 | 0 | 0 | 1 | 7.5 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 1 | 1.0 |
| 2025-Q3 | 0 | 0 | — | 0 | 0 | 1 | 0.5 |
| 2025-Q4 | 1 | 0 | — | 2 | 0 | 1 | 9.8 |
| 2026-Q1 | 4 | 1 | 698.00 | 0 | 0 | 1 | 17.3 |
| 2026-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q3 | 0 | 0 | — | 0 | 0 | 1 | 3.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
| Section | Violations | S&S |
|---|---|---|
| 30 CFR 56.12028Testing grounding systems. | 2 | 0 |
| 30 CFR 41.12Changes; notification by operator. | 1 | 0 |
| 30 CFR 56.12032Inspection and cover plates. | 1 | 0 |
| 30 CFR 56.20003Housekeeping. | 1 | 1 |
| Not reported | 1 | 0 |
Safety activity
Regular Safety and Health Inspection · 3.5 on-site hours
56.20003(a) · S&S · $245.00 proposed
56.12028 · $151.00 proposed
56.12032 · $151.00 proposed
56.12028 · $151.00 proposed
Regular Safety and Health Inspection · 17.3 on-site hours
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
A compressed system was installed. While energizing with compressed air, an air leak occurred in the piping. The failure caused the piping and the receiver tank to collapse. While escaping the area, an employee was struck in the back by a manlift, causing them to fall. During the fall, they struck their head and sustained a head laceration that required stitches.
EXPLODING VESSELS UNDER PRESSURE · DAYS AWAY FROM WORK ONLY
Accident narrative
Incident occurred while installing a new pressurized air system.
Non-Fatal Accident Investigation · 9.8 on-site hours
Description not reported
Special Emphasis Programs · 0.5 on-site hours
Regular Safety and Health Inspection · 1.0 on-site hours
41.12 · $151.00 proposed
Regular Safety and Health Inspection · 7.5 on-site hours
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
OWNERSHIP
Operator and controller history
Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.
—
Imerys S AcontrolsImerys Mica Kings Mountain Inc.operatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274—
General Chemical Industrial Products InccontrolsImerys Mica Kings Mountain Inc.operatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274—
Lhoist GroupcontrolsFranklin Industrial MineralsoperatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274—
Zemex CorpcontrolsKings Mountain Mining LLCoperatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274—
Oglebay Norton CompanycontrolsOglebay Norton Specialty MineraloperatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274—
Franklin Industries InccontrolsFranklin Industrial MineralsoperatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274—
Matthew A Ferro JrcontrolsKmg Minerals IncoperatesPatterson Mine and Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 3100274Other historical summaries · source-specific periods
RECORD SUMMARY
Production, safety and enforcement
These summaries use the periods stated on each card, independently of the reporting period above.
01 / SAFETYwatch
Accidents and injuries
6 historical accident/injury rows; 0 coded fatalities and 246 lost days across the published record.
ACCIDENT + INJURY RECORD4 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
31 violation rows across the full record; 7 carry an S&S flag and $3,880 appears in current assessed amounts.
ENFORCEMENT ACTIVITY10 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
19 personal. 1 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
OCCUPATIONAL EXPOSURE19 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
2K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
3 contested-violation rows, 3 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE6 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions06 / CONTRACTORScontext
Contractors
Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
ENTITY-LEVEL CONTEXT1 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
62 inspection events and 633 published inspection hours across the historical record.
OVERSIGHT COVERAGE16 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 12 silica records across the mine’s published history.
Personal silica samples · concentration / limit
Quarterly mean · published C/E ratio
— No eligible measurements. * Quarter in progress. Means describe the available samples, not average exposure across the mine.
Quartz % is the sample’s quartz content; µg/m³ is its reported concentration. Personal C/E is the ratio to the limit published with that sample. Personal and area concentration units and void status are not specified in those source files.
| Date / sample | Dataset / analyte | Occupation / area | Measurement | Sample status | Published action |
|---|---|---|---|---|---|
| 000000202600242600 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Bagging Operator | 0.85× published limitConcentration: 0000.64 · limit: 0000.75Source unit unspecified | Not reported | NO ACTIONInspection F02C233 |
| 000000202600242700 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Dry Screen Plant Operator | 0.83× published limitConcentration: 0000.55 · limit: 0000.66Source unit unspecified | Not reported | NO ACTIONInspection F02C233 |
Sources and interpretation
- Coal means use numeric concentrations from samples marked not voided, excluding control/invalid sample types and dates after the snapshot. Missing values remain null; reported zeroes remain zero.
- Quarterly means describe available samples, not mine-wide or worker-average exposure. Quarters with no eligible measurements remain empty; the current quarter is partial.
- Personal C/E is MSHA's published concentration-to-limit ratio. A value above 1 is not by itself a citation or a determination under the 2024 silica rule. Personal and area files do not publish a void-status field.
- Area records include bulk-dust analyses and are kept separate from personal exposure results. Their concentration units are not specified in the source dictionary.
- Missing samples do not establish safe conditions. Coal quartz percentage and concentration are separate measures. No compliance threshold is inferred for coal samples.
Coal quartz field definitions ↗Metal/nonmetal personal field definitions ↗Metal/nonmetal area field definitions ↗
EIA + TITLE 30
EIA production and cited regulations
EIA annual figures are reported separately from MSHA. Regulation links use the current eCFR snapshot.
Not present in the 2024 EIA coal workbook.
This can mean the operation is non-coal, inactive for the annual period, or outside the EIA-7A reporting population.
30 CFR 56.20003Housekeeping.1 recent row ↗30 CFR 56.12028Testing grounding systems.2 recent rows ↗30 CFR 56.12032Inspection and cover plates.2 recent rows ↗30 CFR 41.12Changes; notification by operator.1 recent row ↗30 CFR 56.12018Identification of power switches.1 recent row ↗30 CFR 56.14207Parking procedures for unattended equipment.2 recent rows ↗30 CFR 56.12025Grounding circuit enclosures.1 recent row ↗30 CFR 56.12006Distribution boxes.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
508950556.20003(a)S&S
508950456.12028Citation
508950356.12032Citation
508950256.12028Citation
4045979—Order
982233741.12Citation
963842356.12018Citation
963842256.14207Citation
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgForklift Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgBagging Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzKiln/Dryer Operator
C/E: 00.00Concentration: 0003.70 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
14 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors6Mar 4, 2000—Dec 23, 2025mine-keyed
Addresses of Recordidentity · logistics1Oct 20, 2014—Oct 20, 2014mine-keyed
Assessed Violationscompliance · legal30Oct 5, 2000—Jan 22, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal3Jun 21, 2010—Jun 8, 2011mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal—No published rowsabsent / not applicable
Contested Violationscompliance · legal3Nov 28, 2007—Feb 17, 2010mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety88Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety24Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance7Jan 1, 1950—Nov 28, 2007mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance144Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance28Not published—Not publishedmine-keyed
Inspectionssafety · compliance62Apr 3, 2000—Sep 10, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety—No published rowsabsent / not applicable
Metal and Nonmetal Personal Health Sampleshealth · safety19Jan 23, 2002—Jan 22, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal31Oct 5, 2000—Jan 22, 2026mine-keyed
107(a) Orders Issuedsafety · compliance—No published rowsabsent / not applicable
NOTES
Limitations
- Contractor production is entity-level and is never represented as mine-attributable.
- Missing rows can mean no event, publication delay, identity mismatch, or inapplicability.