MINE DETAILS
MERCER STONE PLANT
MSHA MINE ID4602793
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- MERCER STONE PLANT37.30333, -81.06639Open 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
73,416reported 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 | 16,401 | 0.00 | 32 | 1/1 mines reporting |
| 2025 Q2 | 0 | 15,030 | 0.00 | 29 | 1/1 mines reporting |
| 2025 Q3 | 0 | 11,881 | 0.00 | 23 | 1/1 mines reporting |
| 2025 Q4 | 0 | 12,029 | 0.00 | 23 | 1/1 mines reporting |
| 2026 Q1 | 0 | 7,257 | 0.00 | 14 | 1/1 mines reporting |
| 2026 Q2 | 0 | 10,818 | 0.00 | 20 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
113 significant & substantial (S&S)
Accident records
30 records classified as fatality
Proposed penalties · USD
1,927.0010 of 11 violations with amounts
On-site inspection hours
137.256 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 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q2 | 7 | 0 | 1,272.00 | 1 | 0 | 2 | 34.5 |
| 2025-Q3 | 0 | 0 | — | 0 | 0 | 1 | 1.3 |
| 2025-Q4 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q1 | 3 | 2 | 410.00 | 2 | 0 | 2 | 71.5 |
| 2026-Q2 | 1 | 1 | 245.00 | 0 | 0 | 1 | 30.0 |
| 2026-Q3 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
56.20001 · S&S · $245.00 proposed
Regular Safety and Health Inspection · 30.0 on-site hours
56.9101 · S&S · $245.00 proposed
56.14101(a)(3) · S&S · $165.00 proposed
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
Contract truck driver was loaded at the Agg Plant and while descending the hill to the scales, lost EE's brakes, jumped out of the dump truck receiving facial injuries and the truck continued down the road driverless through two berms before finally coming to rest a third berm.
Non-Fatal Accident Investigation · 25.8 on-site hours
Description not reported
Regular Safety and Health Inspection · 45.8 on-site hours
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Employee was being transported to the west pit by a supervisor when they stepped out of the truck and slipped on ice and landed on right hip and right elbow. After onsite evaluation it was determined to take them to the ER for imaging to ensure no further injuries. Employee was diagnosed with a strained shoulder, put on restricted duty and instructed to follow-up with an ortho.
Special Emphasis Programs · 1.3 on-site hours
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Crew was changing belt on BC-8 when the roll of belt being suspended by the boom truck shifted while pulling the belt and crushed little finger on right hand between the roll and the handrail of the man lift they was working from.
103 (g) Written Notification Hazard Complaint Inspectio · 2.5 on-site hours
56.5005 · $366.00 proposed
56.12008 · $151.00 proposed
47.31(a) · $151.00 proposed
56.16005 · $151.00 proposed
Regular Safety and Health Inspection · 32.0 on-site hours
56.14132(b)(1)(i) · $151.00 proposed
56.14100(b) · $151.00 proposed
56.14132(b)(1)(i) · $151.00 proposed
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.
—
Boxley Materials CocontrolsAppalachian Aggregates, LLCoperatesMERCER STONE PLANT
msha-controller-operator-history · controller/operator co-tenure derived on mine 4602793—
CRH PLCcontrolsAppalachian Aggregates, LLCoperatesMERCER STONE PLANT
msha-controller-operator-history · controller/operator co-tenure derived on mine 4602793—
C Mike Hunter Jr et alcontrolsPounding Mill Quarry CorpoperatesMERCER STONE PLANT
msha-controller-operator-history · controller/operator co-tenure derived on mine 4602793—
William C Hunter et alcontrolsPounding Mill Quarry CorpoperatesMERCER STONE PLANT
msha-controller-operator-history · controller/operator co-tenure derived on mine 4602793—
V N GreencontrolsMercer Crushed StoneoperatesMERCER STONE PLANT
msha-controller-operator-history · controller/operator co-tenure derived on mine 4602793Other 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
57 historical accident/injury rows; 0 coded fatalities and 1,384 lost days across the published record.
ACCIDENT + INJURY RECORD8 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
273 violation rows across the full record; 65 carry an S&S flag and $102,510 appears in current assessed amounts.
ENFORCEMENT ACTIVITY56 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
75 personal. 0 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 EXPOSURE75 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
11K employee hours and 20 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
4 contested-violation rows, 5 civil-penalty docket/decision rows, and 8 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE17 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 CONTEXT20 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
100 inspection events and 3K published inspection hours across the historical record.
OVERSIGHT COVERAGE19 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 23 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 |
|---|---|---|---|---|---|
| 000000202601758600 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Front-end Loader Operator | 0× published limitConcentration: 0000.16 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F01509B |
| 000000202601758700 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Truck Driver | 0× published limitConcentration: 0000.13 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F01509B |
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 56.20001Intoxicating beverages and narcotics.1 recent row ↗30 CFR 56.9101Operating speeds and control of equipment.1 recent row ↗30 CFR 56.14101Brakes.2 recent rows ↗30 CFR 56.5005Control of exposure to airborne contaminants.1 recent row ↗30 CFR 56.12008Insulation and fittings for power wires and cables.1 recent row ↗30 CFR 47.31Requirement for a HazCom program.1 recent row ↗30 CFR 56.16005Securing gas cylinders.1 recent row ↗30 CFR 56.14132Horns and backup alarms.2 recent rows ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
984347656.20001S&S
984346856.9101S&S
984346756.14101(a)(3)S&S
9843466—Order
502444256.5005Citation
502444156.12008Citation
502444047.31(a)Citation
502443956.16005Citation
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Nuisance dust, respirable, <1% QtzDry Screen Plant Operator
C/E: 00.01Concentration: 0000.14 · limit: 0010.00Source unit unspecified
Respirable dust, <.1mgDry Screen Plant Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzRotary Bucket Ex. Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzDry Screen Plant Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzDry Screen Plant Operator
C/E: 00.00Concentration: 0000.56 · limit: 0000.00Source unit unspecified
Nuisance dust, respirable, <1% QtzDry Screen Plant Operator
C/E: 00.05Concentration: 0000.46 · limit: 0010.00Source unit unspecified
Respirable dust, <.1mgForklift Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
15 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors57Jul 27, 2000—Mar 3, 2026mine-keyed
Addresses of Recordidentity · logistics1May 9, 1978—May 9, 1978mine-keyed
Assessed Violationscompliance · legal270Aug 17, 2000—Apr 8, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal5Nov 14, 2002—May 14, 2024mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal8Mar 27, 2008—Jun 25, 2018mine-keyed
Contested Violationscompliance · legal4Apr 6, 2011—Jul 26, 2023mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety3,844Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety865Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance5Jan 1, 1950—Jul 17, 2018mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance318Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance100Aug 17, 2000—Apr 1, 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 · safety75Feb 13, 2001—Apr 27, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal273Aug 17, 2000—Apr 8, 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.