MINE DETAILS
Apex Quarry and Plant
MSHA MINE ID2600081
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Apex Quarry and Plant36.35722, -114.91028Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-17. MSHA quarterly production and employment reports.
Coal production
—reported short tons
Hours worked
—reported employee hours
Tons per hour
—production ÷ 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 | — | — | — | — | No report |
| 2025 Q2 | — | — | — | — | No report |
| 2025 Q3 | — | — | — | — | No report |
| 2025 Q4 | — | — | — | — | No report |
| 2026 Q1 | — | — | — | — | No report |
| 2026 Q2 | — | — | — | — | No report |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-17
Violations
320 significant & substantial (S&S)
Accident records
40 records classified as fatality
Proposed penalties · USD
12,074.0032 of 32 violations with amounts
On-site inspection hours
169.505 inspections · 5 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 | 8 | 0 | 4,539.00 | 0 | 0 | 1 | 29.5 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q3 | 6 | 0 | 1,021.00 | 1 | 0 | 1 | 28.0 |
| 2025-Q4 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q1 | 11 | 0 | 5,129.00 | 2 | 0 | 1 | 50.3 |
| 2026-Q2 | 7 | 0 | 1,385.00 | 0 | 0 | 2 | 61.8 |
| 2026-Q3 | 0 | 0 | — | 1 | 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
STRIKING OR BUMPING · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
IW exited the cab of the haul truck and hit their head on the truck's headache rack. This caused a laceration to the top of IW head which required staples to close.
56.12028 · $151.00 proposed
56.12030 · $151.00 proposed
56.12004 · $151.00 proposed
56.11002 · $151.00 proposed
56.12028 · $465.00 proposed
Regular Safety and Health Inspection · 44.5 on-site hours
103 (g) Written Notification Hazard Complaint Inspectio · 17.3 on-site hours
56.9300(a) · $151.00 proposed
56.14100(b) · $165.00 proposed
SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EE was coming down from the loader when EE thought EE was on the last step of the ladder and fell on EE's right side injuring EE's right wrist. Weather conditions were very windy that day.
56.12008 · $755.00 proposed
56.12002 · $151.00 proposed
56.12008 · $755.00 proposed
56.3131 · $755.00 proposed
47.51 · $151.00 proposed
56.12018 · $366.00 proposed
56.14107(a) · $549.00 proposed
56.20003(a) · $366.00 proposed
56.20003(a) · $366.00 proposed
56.14107(a) · $549.00 proposed
56.16005 · $366.00 proposed
Regular Safety and Health Inspection · 50.3 on-site hours
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee (EE) was walking around a pilar to collect tools for a job when EE's feet slipped out from under EE and EE fell to the ground on EE's left shoulder. EE was seen at the clinic and diagnosed with a left shoulder strain and a left knee strain and released with restrictions
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Employee was walking in the work area when EE tripped and fell over a pipe that was in EE's path of travel.
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-17.
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.
—
Martin Marietta Materials InccontrolsMartin Marietta Materials, Inc.operatesApex Quarry and Plant
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600081—
Lhoist GroupcontrolsLhoist North America of Arizona Inc.operatesApex Quarry and Plant
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600081—
Chemical Lime CompanycontrolsLhoist North America of Arizona Inc.operatesApex Quarry and Plant
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600081—
Cimenteries Cbr CementbedrijvencontrolsGenstar Lime CompanyoperatesApex Quarry and Plant
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600081—
Flintkote CompanycontrolsFlintkote CompanyoperatesApex Quarry and Plant
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600081Other 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
151 historical accident/injury rows; 1 coded fatalities and 1,288 lost days across the published record.
ACCIDENT + INJURY RECORD13 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
845 violation rows across the full record; 145 carry an S&S flag and $464,341 appears in current assessed amounts.
ENFORCEMENT ACTIVITY124 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
39 personal; 5 area. 4 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 EXPOSURE44 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
50K employee hours and 87 summed average employees across reported subunits in the latest published quarter.
2002-Q40 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
58 contested-violation rows, 59 civil-penalty docket/decision rows, and 57 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE174 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 CONTEXT41 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
133 inspection events and 5K published inspection hours across the historical record.
OVERSIGHT COVERAGE16 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 17, 2026. 4 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 56.12028Testing grounding systems.2 recent rows ↗30 CFR 56.12030Correction of dangerous conditions.1 recent row ↗30 CFR 56.12004Electrical conductors.1 recent row ↗30 CFR 56.11002Handrails and toeboards.1 recent row ↗30 CFR 56.9300Berms or guardrails.1 recent row ↗30 CFR 56.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 56.12008Insulation and fittings for power wires and cables.2 recent rows ↗30 CFR 56.12002Controls and switches.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
510383356.12028Citation
510383256.12030Citation
510800456.12004Citation
510383156.11002Citation
510376256.12028Citation
510376156.9300(a)Citation
510383056.14100(b)Citation
510325456.12008Citation
Coal dust, noise and other contaminants. Silica records above ↑
Nuisance dust, respirable, <1% QtzLaborer, Bullgang
C/E: 00.07Concentration: 0000.66 · limit: 0010.00Source unit unspecified
Nuisance dust, respirable, <1% QtzLaborer, Bullgang
C/E: 00.05Concentration: 0000.46 · limit: 0010.00Source unit unspecified
Nuisance dust, respirable, <1% QtzCleanup Man
C/E: 00.06Concentration: 0000.60 · limit: 0010.00Source unit unspecified
Nuisance dust, respirable, <1% QtzCleanup Man
C/E: 00.05Concentration: 0000.45 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzLaborer, Bullgang
C/E: 00.01Concentration: 0000.14 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzLaborer, Bullgang
C/E: 00.06Concentration: 0000.56 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 02.14Concentration: 0021.44 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzCleanup Man
C/E: 01.32Concentration: 0013.21 · 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 · contractors151Jan 12, 2000—Aug 3, 2026mine-keyed
Addresses of Recordidentity · logistics1Mar 9, 2009—Mar 9, 2009mine-keyed
Assessed Violationscompliance · legal832Jun 1, 2001—Jun 3, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal59Aug 22, 2003—Dec 20, 2017mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal57Jul 11, 2001—Apr 16, 2015mine-keyed
Contested Violationscompliance · legal58Sep 5, 2007—Nov 22, 2016mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety5,278Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety1,021Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance5Jan 1, 1950—Sep 15, 2026mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance33Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance133Jun 1, 2001—Jun 1, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety5Aug 24, 2009—Jul 7, 2016mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety39Jun 6, 2001—Jun 8, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal845Jun 1, 2001—Jun 3, 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.