MSHA DATABASEMSHA records · 16 contributing sources · snapshot Oct 18, 2026

MINE DETAILS

Louisville Plant Quarry & Mill

ActiveFacilityCement
MSHA MINE ID2500002
LOCATIONCass, NE
PUBLIC RECORD10,687 linked rows

LOCATION

Mine location

1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-18Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

245

36 significant & substantial (S&S)

  1. 2025 Q10
  2. 2025 Q2111
  3. 2025 Q30
  4. 2025 Q40
  5. 2026 Q124
  6. 2026 Q2108
  7. 2026 Q32
  8. 2026 Q4 *0

Accident records

13

0 records classified as fatality

  1. 2025 Q11
  2. 2025 Q25
  3. 2025 Q31
  4. 2025 Q41
  5. 2026 Q10
  6. 2026 Q21
  7. 2026 Q34
  8. 2026 Q4 *0

Proposed penalties · USD

338,977.00

242 of 245 violations with amounts

  1. 2025 Q1—
  2. 2025 Q268,751
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q124,475
  6. 2026 Q2245,751
  7. 2026 Q3—
  8. 2026 Q4 *—

On-site inspection hours

713.50

13 inspections · 13 with hours

  1. 2025 Q1—
  2. 2025 Q2264.00
  3. 2025 Q314.50
  4. 2025 Q43.00
  5. 2026 Q190.75
  6. 2026 Q2325.75
  7. 2026 Q315.50
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q100—100—
2025-Q21111468,751.00502264.0
2025-Q300—10314.5
2025-Q400—1013.0
2026-Q124324,475.0000190.8
2026-Q210818245,751.00102325.8
2026-Q321—40415.5
2026-Q4 *00—000—

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

Safety activity

  1. accident220262650005

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee reported pain and feeling a pop in the left side of EE's chest when EE was stretched out trying to align a pipe fitting.

  2. accident220262430060

    MACHINERY · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was investigating the preheat tower pressures and dusting when they opened a port and pressure blew hot kiln feed dust into face and eyes resulting in abrasions and thermal burn in both eyes.

  3. accident220262090009

    DISORDERS (PHYSICAL AGENTS) · OCCUPATNAL ILLNESS NOT DEG 1-6

    Accident narrative

    Employee was climbing the stairs on the preheat tower and called over the radio to a co-worker that they needed to rest and felt dizzy. When the co-worker arrived, the employee was lying on the floor unconscious. Employee was brought conscious by a few shakes and hydrated and took to emergency room for check. They was diagnosed with heat syncope.

  4. accident220261980010

    DISORDERS (PHYSICAL AGENTS) · OCCUPATNAL ILLNESS NOT DEG 1-6

    Accident narrative

    Employee fainted while working in the blend silos. A co-worker found the employee on the floor. The employee was seen by the co-worker just a few minutes earlier. The employee was diagnosed with heat syncope and administered IV fluids.

  5. accident220261540006

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    While walking down the shop stairs the employee felt and heard a pop in EE's knee causing pain and trouble putting weight on. Employee was prescribed medication for swelling and a knee brace resulting in a reportable injury.

  6. accident220253170518

    STRIKING OR BUMPING · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee cut their left forearm with a razor blade stuck in a pallet resulting in 4 stitches.

  7. accident220252060013

    HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee reported pain in right wrist while using a spade shovel to clean built up material in the tracks of the dozer. While chipping the material the spade hit some very hard material and sprained their right wrist. Employee was given a splint and physical therapy as treatment.

  8. accident220251540012

    HANDTOOLS (NONPOWERED) · PERM TOT OR PERM PRTL DISABLTY

    Accident narrative

    While positioning a feeder for install with three other miners the employee pinched right middle finger when unhooking a chain hoist hook and the feeder moved unexpectedly. The pinch removed the tissue from the tip of the finger. The result was an partial amputation of the tip of the right middle finger performed at the ER.

  9. accident220251910016

    SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT

    Accident narrative

    Coming out of a trailer the employee tripped on the top step and fell to the ground on their right shoulder. The fall was 3 steps high and approximately 3 1/2 feet. This became a lost time incident when the employee received surgery on 7/2/2025 for a rotator cuff tear.

  10. accident220251360007

    MACHINERY · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was removing an aqua ammonia (19% ammonia) spray lance. The tip of the spray was plugged up and pressure built in the closed, locked out line. When the connection was broke loose the residual line material blew out into the area contacting EE's face and eyes. Employee was monitored and prescribed medication for EE's eyes.

  11. accident220251360002

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee got material/dust in EE's right eye when EE was pulling apart a hose connection. When the hose broke apart loose material was thrown up into the employees face/eye. The employee was prescribed antibiotic eye drops making this a reportable injury.

  12. accident220251360004

    MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee was helping to remove an aqua ammonia (19% ammonia) spray lance. The tip of the spray was plugged up and pressure built in the closed, locked out line. When the connection was broke loose the residual line material blew out into the area contacting EE's head and EE inhaled some vapor causing irritation. Employee was monitored and prescribed an inhaler for the irritation.

  13. accident220250510012

    HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was using a pipe wrench to break a rotary feeder free. EE was unable to break it free by hand. EE then used EE's body weight by standing on the wrench. EE slipped off and the impact to the flooring caused pain in EE's left knee.

Safety sources and definitions

MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-18.

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.

CURRENT HIERARCHYCRH PLC → Ash Grove Cement Company → Louisville Plant Quarry & Mill
HISTORY RECORDS25 relationships
INTERVAL CHECKPASScontroller/operator overlap
—

CRH PLCcontrolsAsh Grove Cement CompanyoperatesLouisville Plant Quarry & Mill

msha-controller-operator-history · controller/operator co-tenure derived on mine 2500002
—

Ash Grove Cement CompanycontrolsAsh Grove Cement CompanyoperatesLouisville Plant Quarry & Mill

msha-controller-operator-history · controller/operator co-tenure derived on mine 2500002
Other 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

228 historical accident/injury rows; 0 coded fatalities and 1,530 lost days across the published record.

ACCIDENT + INJURY RECORD32 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

1,535 violation rows across the full record; 273 carry an S&S flag and $981,988 appears in current assessed amounts.

ENFORCEMENT ACTIVITY546 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

245 personal; 8 area. 15 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 EXPOSURE253 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

76K employee hours and 126 summed average employees across reported subunits in the latest published quarter.

2026-Q20 tons
mine-production-quarterlymine-production-yearly
05 / LEGALwatch

Contests, conferences and decisions

408 contested-violation rows, 408 civil-penalty docket/decision rows, and 25 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE841 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions
06 / 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 CONTEXT48 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

140 inspection events and 9K published inspection hours across the historical record.

OVERSIGHT COVERAGE42 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records30 coal · 2 personal · 1 area
Sample status0 not voided0 voided · 3 status not reported
Personal samples with C/E > 122 published ratios · not a citation count
2026 · May 1, 2026–May 1, 2026
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished action
000000202601823974Metal/nonmetal areaQUARTZ (BULK DUST)SF ORE PROCESSINGC/E not reportedConcentration: 0000.0000Source unit unspecifiedNot reportedNO ACTIONInspection F016E82
000000202601823400Metal/nonmetal personalQuartz, respirable, >1% QtzLaborer, Bullgang7.38× published limitConcentration: 0004.28 · limit: 0000.58Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F016E82
000000202601823600Metal/nonmetal personalQuartz, respirable, >1% QtzCleanup Man13.51× published limitConcentration: 0007.43 · limit: 0000.55Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F016E82
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.

RECENT PUBLIC RECORDS

Recent violations and samples

Latest records retained for inspection; aggregates above use the full source history.

VIOLATIONS12 latest shown
504279756.20003(a)S&S
998972650.20-1Citation
504276856.14207Citation
504276756.14207Citation
504253156.5001(a)/56.5005S&S
504253056.5001(a)/56.5005S&S
504295856.12028S&S
504252956.12001S&S
OTHER HEALTH SAMPLES8 latest shown

Coal dust, noise and other contaminants. Silica records above ↑

Unlisted Particulate, respirable, <1% QtzKiln/Dryer Operator
C/E: 00.00Concentration: 1762.83 · limit: 0000.00Source unit unspecified
Nuisance dust, total, <1% QtzUtility Man
C/E: 00.09Concentration: 0000.87 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzUtility Man
C/E: 00.21Concentration: 0002.10 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzUtility Man
C/E: 00.37Concentration: 0003.70 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzUtility Man
C/E: 00.35Concentration: 0003.52 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzUtility Man
C/E: 00.35Concentration: 0003.54 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 00.49Concentration: 0004.86 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 00.77Concentration: 0007.69 · limit: 0010.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

16 datasets contain linked records. Missing datasets are listed below.

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors228Feb 2, 2000—Sep 10, 2026mine-keyed
Addresses of Recordidentity · logistics1Feb 17, 2015—Feb 17, 2015mine-keyed
Assessed Violationscompliance · legal1,521Mar 1, 2000—May 14, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal408Oct 25, 2006—May 15, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal25Jun 13, 2000—Mar 11, 2025mine-keyed
Contested Violationscompliance · legal408Mar 15, 2006—May 12, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety4,711Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety1,055Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance2Jan 1, 1950—Jan 1, 1950mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance318Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance140Feb 29, 2000—Sep 21, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety8Aug 21, 2024—May 1, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety245Mar 22, 2001—May 1, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal1,535Mar 1, 2000—Sep 9, 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.