MINE DETAILS
Kerford Limestone Company
MSHA MINE ID2501126
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Kerford Limestone Company40.87222, -96.18944Open 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
274,946reported 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 | 43,476 | 0.00 | 77 | 1/1 mines reporting |
| 2025 Q2 | 0 | 46,139 | 0.00 | 77 | 1/1 mines reporting |
| 2025 Q3 | 0 | 44,112 | 0.00 | 78 | 1/1 mines reporting |
| 2025 Q4 | 0 | 45,592 | 0.00 | 78 | 1/1 mines reporting |
| 2026 Q1 | 0 | 47,299 | 0.00 | 78 | 1/1 mines reporting |
| 2026 Q2 | 0 | 48,328 | 0.00 | 77 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
261 significant & substantial (S&S)
Accident records
40 records classified as fatality
Proposed penalties · USD
5,498.0026 of 26 violations with amounts
On-site inspection hours
351.759 inspections · 9 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 | 7 | 0 | 2,257.00 | 0 | 0 | 2 | 41.0 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 1 | 44.0 |
| 2025-Q3 | 3 | 0 | 453.00 | 1 | 0 | 1 | 50.5 |
| 2025-Q4 | 8 | 1 | 1,580.00 | 2 | 0 | 1 | 31.0 |
| 2026-Q1 | 3 | 0 | 453.00 | 1 | 0 | 2 | 67.3 |
| 2026-Q2 | 4 | 0 | 604.00 | 0 | 0 | 1 | 82.5 |
| 2026-Q3 | 1 | 0 | 151.00 | 0 | 0 | 1 | 35.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
57.14100(b) · $151.00 proposed
Regular Safety and Health Inspection · 35.5 on-site hours
57.12028 · $151.00 proposed
57.14115(b) · $151.00 proposed
57.11001 · $151.00 proposed
57.12032 · $151.00 proposed
Regular Safety and Health Inspection · 82.5 on-site hours
57.12008 · $151.00 proposed
47.41(a) · $151.00 proposed
57.12008 · $151.00 proposed
Regular Safety and Health Inspection · 60.5 on-site hours
EXPLOSIVES AND BREAKING AGENTS · ACCIDENT ONLY
Accident narrative
An employee was operating a CAT 982M loader to clean out scaling material from a heading underground. On the last load out the bucket made contact with a blasting cap that had not detonated when the heading was shot. There was no damage to the loader and no injury.
Non-Injury Accident Investigation · 6.8 on-site hours
57.14100(c) · $151.00 proposed
57.14100(b) · $209.00 proposed
57.4102 · $151.00 proposed
57.9300(a) · S&S · $465.00 proposed
57.14213(a) · $151.00 proposed
57.4101 · $151.00 proposed
57.14107(a) · $151.00 proposed
57.3200 · $151.00 proposed
Regular Safety and Health Inspection · 31.0 on-site hours
POWERED HAULAGE · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Employee running loader underground and claimed they were jerked side to side due to the abrupt transitions in the roads. They noticed possible hernia on 11/26/25 and reported to management on 11/29/25. Employee was seen by a physician on 12/1/25 and placed on light duty.
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was unloading a haul truck at a stockpile. The truck bed raised about 4 feet then stopped and would not go any further. When the driver switched the dump switch to neutral to lower the box, the box dropped with no hydraulic cushion. When the box made contact with the frame it shook the truck. After the incident the employee complained of soreness in thei back and neck.
57.12068 · $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.
—
Constructors Inc (NE)controlsKerford Limestone CompanyoperatesKerford Limestone Company
msha-controller-operator-history · controller/operator co-tenure derived on mine 2501126Other 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
65 historical accident/injury rows; 0 coded fatalities and 1,125 lost days across the published record.
ACCIDENT + INJURY RECORD15 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
720 violation rows across the full record; 149 carry an S&S flag and $222,548 appears in current assessed amounts.
ENFORCEMENT ACTIVITY110 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
329 personal; 25 area. 19 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 EXPOSURE354 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
48K employee hours and 77 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
384 contested-violation rows, 389 civil-penalty docket/decision rows, and 32 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE805 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 CONTEXT9 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
196 inspection events and 9K published inspection hours across the historical record.
OVERSIGHT COVERAGE35 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 14 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 57.14100Safety defects; examination, correction and records.3 recent rows ↗30 CFR 57.12028Testing grounding systems.1 recent row ↗30 CFR 57.14115Stationary grinding machines.1 recent row ↗30 CFR 57.11001Safe access.1 recent row ↗30 CFR 57.12032Inspection and cover plates.1 recent row ↗30 CFR 57.12008Insulation and fittings for power wires and cables.2 recent rows ↗30 CFR 47.41Requirement for container labels.1 recent row ↗30 CFR 57.4102Spillage and leakage.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
504771857.14100(b)Citation
505598057.12028Citation
505597957.14115(b)Citation
521104857.11001Citation
505597857.12032Citation
505384057.12008Citation
505596947.41(a)Citation
505383957.12008Citation
Coal dust, noise and other contaminants. Silica records above ↑
Unlisted Particulate, total, <1% QtzSupervisor, Co. Official
C/E: 00.00Concentration: 0001.47 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzUtility Man
C/E: 00.00Concentration: 0004.65 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzUtility Man
C/E: 00.00Concentration: 0003.98 · limit: 0000.00Source unit unspecified
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, Jumbo Perc.
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 · contractors65Jun 30, 2000—Feb 11, 2026mine-keyed
Addresses of Recordidentity · logistics1Oct 1, 1991—Oct 1, 1991mine-keyed
Assessed Violationscompliance · legal706Feb 29, 2000—Jul 20, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal389Jan 21, 2004—Sep 2, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal32Jul 6, 2000—Mar 25, 2026mine-keyed
Contested Violationscompliance · legal384Sep 18, 2007—Feb 11, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety1,319Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety291Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance1Feb 1, 1991—Feb 1, 1991mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance424Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance108Not published—Not publishedmine-keyed
Inspectionssafety · compliance196Feb 29, 2000—Jul 18, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety25Sep 9, 2009—Feb 18, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety329Jun 6, 2001—May 21, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal720Feb 29, 2000—Jul 20, 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.