MINE DETAILS
Lone Star Quarry & Mill
MSHA MINE ID2300134
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Lone Star Quarry & Mill37.31944, -89.53806Open 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
629,593reported 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 | 114,479 | 0.00 | 204 | 1/1 mines reporting |
| 2025 Q2 | 0 | 101,726 | 0.00 | 200 | 1/1 mines reporting |
| 2025 Q3 | 0 | 103,266 | 0.00 | 197 | 1/1 mines reporting |
| 2025 Q4 | 0 | 101,976 | 0.00 | 197 | 1/1 mines reporting |
| 2026 Q1 | 0 | 107,576 | 0.00 | 192 | 1/1 mines reporting |
| 2026 Q2 | 0 | 100,570 | 0.00 | 193 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
4114 significant & substantial (S&S)
Accident records
60 records classified as fatality
Proposed penalties · USD
168,679.0040 of 41 violations with amounts
On-site inspection hours
258.5010 inspections · 10 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 | 2 | 0 | 1,551.00 | 0 | 0 | 1 | 12.0 |
| 2025-Q2 | 20 | 11 | 151,857.00 | 0 | 0 | 4 | 81.5 |
| 2025-Q3 | 0 | 0 | — | 0 | 0 | 1 | 8.0 |
| 2025-Q4 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2026-Q1 | 9 | 2 | 7,863.00 | 2 | 0 | 1 | 68.8 |
| 2026-Q2 | 9 | 1 | 7,408.00 | 1 | 0 | 2 | 76.3 |
| 2026-Q3 | 1 | 0 | — | 2 | 0 | 1 | 12.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
EXPLODING VESSELS UNDER PRESSURE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was using CO2 to dislodge a chunk of material in the preheater tower. When the shot went off, it dislodged a small port door, which contacted the employee's left elbow. This caused a small laceration.
Spot Inspection · 12.0 on-site hours
56.20003(a)
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was driving a concrete mixer truck approx. 15-18 mph on the plant road toward the river shop. The driver's side front steer tire blew out causing the truck to immediately pull to the left and struck an abandoned fix support structure. This caused the employee to strike the steering wheel, resulting in laceration that required sutures.
HANDLING OF MATERIALS · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
EE started cleaning the tower at the throat. EE went to close the lower west door and some material came out of the port onto EE's gloved right hand. This caused a burn on EE's right hand.
56.14100(b) · $697.00 proposed
56.14112(a)(1) · $193.00 proposed
56.14100(b) · $642.00 proposed
56.12002 · $193.00 proposed
56.20003(a) · S&S · $3,736.00 proposed
56.12028 · $151.00 proposed
56.14107(a) · $288.00 proposed
56.14100(b) · $549.00 proposed
56.14100(b) · $959.00 proposed
Regular Safety and Health Inspection · 71.8 on-site hours
Verbal Hazard Complaint Inspections · 4.5 on-site hours
56.12008 · $151.00 proposed
56.12030 · S&S · $1,818.00 proposed
56.12004 · S&S · $2,312.00 proposed
56.14112(a)(1) · $151.00 proposed
56.12028 · $151.00 proposed
56.12008 · $151.00 proposed
56.12002 · $267.00 proposed
56.20003(a) · $1,431.00 proposed
Regular Safety and Health Inspection · 68.8 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.
—
Buzzi S p AcontrolsBuzzi Unicem USAoperatesLone Star Quarry & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300134—
Dyckerhoff AGcontrolsBuzzi Unicem USAoperatesLone Star Quarry & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300134—
Lone Star Industries InccontrolsLone Star Industries IncoperatesLone Star Quarry & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300134—
Gulf + Western Industries InccontrolsMarquette Cement Manufacturing CompanyoperatesLone Star Quarry & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300134Other 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
247 historical accident/injury rows; 3 coded fatalities and 4,621 lost days across the published record.
ACCIDENT + INJURY RECORD27 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
649 violation rows across the full record; 130 carry an S&S flag and $399,431 appears in current assessed amounts.
ENFORCEMENT ACTIVITY210 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
112 personal. 9 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 EXPOSURE112 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
101K employee hours and 193 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
113 contested-violation rows, 110 civil-penalty docket/decision rows, and 25 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE248 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 CONTEXT33 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
165 inspection events and 8K published inspection hours across the historical record.
OVERSIGHT COVERAGE37 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 27 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 56.20003Housekeeping.2 recent rows ↗30 CFR 56.14100Safety defects; examination, correction and records.4 recent rows ↗30 CFR 56.14112Construction and maintenance of guards.1 recent row ↗30 CFR 56.12002Controls and switches.1 recent row ↗30 CFR 56.12028Testing grounding systems.1 recent row ↗30 CFR 56.14107Moving machine parts.1 recent row ↗30 CFR 56.12008Insulation and fittings for power wires and cables.1 recent row ↗30 CFR 56.12030Correction of dangerous conditions.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
501175256.20003(a)Citation
501171956.14100(b)Citation
501171856.14112(a)(1)Citation
501171756.14100(b)Citation
501171656.12002Citation
501171556.20003(a)S&S
501171456.12028Citation
501171356.14107(a)Citation
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
Respirable dust, <.1mgUtility Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgUtility Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 00.22Concentration: 0002.18 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 00.24Concentration: 0002.40 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 00.99Concentration: 0009.90 · limit: 0010.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
15 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors247Jan 13, 2000—Sep 15, 2026mine-keyed
Addresses of Recordidentity · logistics1May 20, 1974—May 20, 1974mine-keyed
Assessed Violationscompliance · legal637Feb 24, 2000—Jun 1, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal110Apr 26, 2001—May 29, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal25Mar 22, 2000—Mar 31, 2026mine-keyed
Contested Violationscompliance · legal113Dec 13, 2005—Jun 25, 2025mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety4,053Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety848Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance4Jan 1, 1950—Oct 4, 1999mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance318Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance165Feb 23, 2000—Sep 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 · safety112Aug 1, 2001—Jun 2, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal649Feb 24, 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.