MINE DETAILS
Underground Black River Operation
MSHA MINE ID1500062
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Underground Black River Operation38.83028, -84.29194Open 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
734,469reported 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 | 119,701 | 0.00 | 199 | 1/1 mines reporting |
| 2025 Q2 | 0 | 119,347 | 0.00 | 201 | 1/1 mines reporting |
| 2025 Q3 | 0 | 120,544 | 0.00 | 200 | 1/1 mines reporting |
| 2025 Q4 | 0 | 121,506 | 0.00 | 207 | 1/1 mines reporting |
| 2026 Q1 | 0 | 127,516 | 0.00 | 203 | 1/1 mines reporting |
| 2026 Q2 | 0 | 125,855 | 0.00 | 204 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
15240 significant & substantial (S&S)
Accident records
190 records classified as fatality
Proposed penalties · USD
72,110.00150 of 152 violations with amounts
On-site inspection hours
916.7516 inspections · 16 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 | 21 | 8 | 11,350.00 | 2 | 0 | 2 | 140.0 |
| 2025-Q2 | 25 | 10 | 11,754.00 | 3 | 0 | 3 | 175.3 |
| 2025-Q3 | 18 | 3 | 6,128.00 | 4 | 0 | 2 | 122.8 |
| 2025-Q4 | 20 | 6 | 11,688.00 | 2 | 0 | 2 | 87.0 |
| 2026-Q1 | 24 | 4 | 13,689.00 | 6 | 0 | 2 | 112.3 |
| 2026-Q2 | 17 | 4 | 10,727.00 | 1 | 0 | 2 | 164.5 |
| 2026-Q3 | 27 | 5 | 6,774.00 | 1 | 0 | 3 | 115.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Spot Inspection · 4.5 on-site hours
STEPPING OR KNEELING ON OBJECT · DAYS AWAY FROM WORK ONLY
Accident narrative
EE stepped on a piece of large kiln feed stone and felt pain in their left knee. This incident happened while exiting a surface haul truck.
Verbal Hazard Complaint Inspections · 5.8 on-site hours
57.11001 · S&S · $1,431.00 proposed
57.13021 · $151.00 proposed
57.12028 · $151.00 proposed
57.17001 · $151.00 proposed
57.14107(b) · S&S · $883.00 proposed
57.14100(b) · $151.00 proposed
57.11008 · $151.00 proposed
57.14112(a)(1) · S&S · $398.00 proposed
57.12032 · S&S · $267.00 proposed
57.20008(a) · $151.00 proposed
57.14103(b) · $151.00 proposed
57.14112(b) · S&S · $398.00 proposed
57.11001 · $226.00 proposed
57.4530 · $151.00 proposed
57.12028 · $151.00 proposed
57.14107(a) · $151.00 proposed
57.12028 · $151.00 proposed
57.20003(a) · $151.00 proposed
57.4502(c) · $151.00 proposed
57.12004 · $151.00 proposed
57.14103(b) · $151.00 proposed
57.20003(a) · $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.
—
Carmeuse Holding SAcontrolsCarmeuse Lime and Stone IncoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
Carmeuse Holding SAcontrolsCarmeuse Lime and Stone IncoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
Lafarge SAcontrolsCarmeuse Lime and Stone IncoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
Carmeuse Holding SAcontrolsCarmeuse LimeoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
Carmeuse Holding SAcontrolsDravo Lime IncoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
Lafarge SAcontrolsDravo Lime IncoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
Dravo CorpcontrolsDravo Lime CompanyoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062—
LTV CorpcontrolsBlack River Lime CompanyoperatesUnderground Black River Operation
msha-controller-operator-history · controller/operator co-tenure derived on mine 1500062Other 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
204 historical accident/injury rows; 1 coded fatalities and 2,929 lost days across the published record.
ACCIDENT + INJURY RECORD55 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
1,185 violation rows across the full record; 363 carry an S&S flag and $673,555 appears in current assessed amounts.
ENFORCEMENT ACTIVITY488 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
418 personal; 22 area. 27 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 EXPOSURE440 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
126K employee hours and 204 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
41 contested-violation rows, 41 civil-penalty docket/decision rows, and 15 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE97 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 CONTEXT14 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
257 inspection events and 12K published inspection hours across the historical record.
OVERSIGHT COVERAGE41 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 2 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 |
|---|---|---|---|---|---|
| No silica records match these filters. Missing samples do not establish safe conditions. | |||||
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 57.11001Safe access.1 recent row ↗30 CFR 57.13021High-pressure hose connections.1 recent row ↗30 CFR 57.12028Testing grounding systems.1 recent row ↗30 CFR 57.17001Illumination of surface working areas.1 recent row ↗30 CFR 57.14107Moving machine parts.1 recent row ↗30 CFR 57.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 57.11008Restricted clearance.1 recent row ↗30 CFR 57.14112Construction and maintenance of guards.2 recent rows ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
824291357.11001S&S
508368457.13021Citation
508368357.12028Citation
508368257.17001Citation
508368157.14107(b)S&S
508368057.14100(b)Citation
508367957.11008Citation
508367857.14112(a)(1)S&S
Coal dust, noise and other contaminants. Silica records above ↑
TC from EC @ 160Scaling (mechanical)
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Scaling (mechanical)
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONScaling (mechanical)
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Scaling (mechanical)
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Drill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Drill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONDrill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Drill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors204Feb 3, 2000—Sep 18, 2026mine-keyed
Addresses of Recordidentity · logistics1Mar 5, 1979—Mar 5, 1979mine-keyed
Assessed Violationscompliance · legal1,165Jan 25, 2000—Sep 1, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal41Aug 10, 2006—Oct 13, 2022mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal15Dec 18, 2001—May 13, 2026mine-keyed
Contested Violationscompliance · legal41Mar 24, 2005—May 4, 2022mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety2,216Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety453Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance8Jan 1, 1950—Mar 17, 2003mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance340Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance82Not published—Not publishedmine-keyed
Inspectionssafety · compliance257Jan 25, 2000—Sep 23, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety22Aug 20, 2009—Jun 30, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety418Jun 12, 2001—Jun 30, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal1,185Jan 25, 2000—Sep 1, 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.