MINE DETAILS
Hannibal Underground
MSHA MINE ID2302434
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Hannibal Underground39.68194, -91.31278Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
502,108reported 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 | 86,318 | 0.00 | 140 | 1/1 mines reporting |
| 2025 Q2 | 0 | 86,318 | 0.00 | 140 | 1/1 mines reporting |
| 2025 Q3 | 0 | 86,318 | 0.00 | 140 | 1/1 mines reporting |
| 2025 Q4 | 0 | 86,318 | 0.00 | 140 | 1/1 mines reporting |
| 2026 Q1 | 0 | 79,612 | 0.00 | 140 | 1/1 mines reporting |
| 2026 Q2 | 0 | 77,224 | 0.00 | 140 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
19250 significant & substantial (S&S)
Accident records
60 records classified as fatality
Proposed penalties · USD
134,771.00182 of 192 violations with amounts
On-site inspection hours
923.5020 inspections · 20 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 | 22 | 5 | 16,399.00 | 0 | 0 | 3 | 129.8 |
| 2025-Q2 | 15 | 1 | 6,948.00 | 0 | 0 | 1 | 66.8 |
| 2025-Q3 | 43 | 7 | 23,307.00 | 1 | 0 | 6 | 208.3 |
| 2025-Q4 | 15 | 2 | 9,990.00 | 0 | 0 | 2 | 78.8 |
| 2026-Q1 | 20 | 6 | 18,390.00 | 2 | 0 | 2 | 121.8 |
| 2026-Q2 | 45 | 16 | 30,337.00 | 3 | 0 | 3 | 151.5 |
| 2026-Q3 | 25 | 11 | 29,400.00 | 0 | 0 | 2 | 132.3 |
| 2026-Q4 * | 7 | 2 | — | 0 | 0 | 1 | 34.5 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
56.11001 · S&S · $959.00 proposed
56.12008 · $432.00 proposed
56.17001 · $151.00 proposed
56.20011 · $432.00 proposed
56.9315 · $432.00 proposed
56.3200 · S&S · $642.00 proposed
57.18002(a) · S&S · $2,133.00 proposed
57.20003(a)
57.16005 · $151.00 proposed
57.14112(b) · $193.00 proposed
56.12028 · $151.00 proposed
56.14100(b) · S&S · $1,126.00 proposed
56.20003(a) · $151.00 proposed
56.4201(a) · $151.00 proposed
56.20003(a) · $151.00 proposed
56.20003(a) · S&S · $755.00 proposed
56.20003(a) · $151.00 proposed
57.20003(a) · S&S · $1,866.00 proposed
57.4102 · $151.00 proposed
57.11001 · S&S · $6,540.00 proposed
57.20003(a) · $1,126.00 proposed
56.11001 · S&S · $755.00 proposed
56.12028 · $226.00 proposed
56.4104(a) · S&S · $755.00 proposed
56.14107(a) · S&S · $2,503.00 proposed
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.
—
Quikrete Holdings Inc.controlsContinental Cement Company, LLCoperatesHannibal Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2302434—
Summit Materials LLCcontrolsContinental Cement Company, LLCoperatesHannibal Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2302434—
Continental Cement Holding CompanycontrolsContinental Cement Company, LLCoperatesHannibal Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2302434Other 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
98 historical accident/injury rows; 0 coded fatalities and 697 lost days across the published record.
ACCIDENT + INJURY RECORD30 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
1,608 violation rows across the full record; 346 carry an S&S flag and $1,445,216 appears in current assessed amounts.
ENFORCEMENT ACTIVITY910 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
302 personal; 30 area. 31 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 EXPOSURE332 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
77K employee hours and 140 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
187 contested-violation rows, 187 civil-penalty docket/decision rows, and 109 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE483 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 CONTEXT39 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
168 inspection events and 11K published inspection hours across the historical record.
OVERSIGHT COVERAGE79 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 18, 2026. 13 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 |
|---|---|---|---|---|---|
| 000000202601904300 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Utility Man | 0× published limitConcentration: 0000.58 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F03B8F2 |
| 000000202600163900 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Miner, Drift | 0× published limitConcentration: 0000.28 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F023A6F |
| 000000202600115200 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Utility Man | 0× published limitConcentration: 0000.21 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F023A6F |
| 000000202600115300 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Utility Man | 0× published limitConcentration: 0000.85 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F023A6F |
| 000000202600115500 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Cleanup Man | 0× published limitConcentration: 0000.25 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F023A6F |
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 47.44Temporary, portable containers.1 recent row ↗30 CFR 57.4100Smoking and use of open flames.1 recent row ↗30 CFR 57.14100Safety defects; examination, correction and records.2 recent rows ↗30 CFR 57.11001Safe access.4 recent rows ↗30 CFR 57.20003Housekeeping.3 recent rows ↗30 CFR 57.4201Inspection.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
978896947.44(b)Citation
978896857.4100(b)Citation
978896757.14100(b)Citation
978896657.11001Citation
978896557.11001S&S
978896457.20003(b)S&S
978896357.4201(a)(1)Citation
501513657.20003(a)S&S
Coal dust, noise and other contaminants. Silica records above ↑
Nuisance dust, respirable, <1% QtzUtility Man
C/E: 00.27Concentration: 0002.73 · limit: 0010.00Source unit unspecified
TC from EC @ 160Truck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Truck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Truck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Front-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Front-end Loader Operator
C/E: 00.33Concentration: 0052.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors98Apr 24, 2012—Jun 29, 2026mine-keyed
Addresses of Recordidentity · logistics1Oct 1, 2013—Oct 1, 2013mine-keyed
Assessed Violationscompliance · legal1,575Aug 29, 2012—Jul 22, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal187Apr 24, 2014—Aug 3, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal109Apr 12, 2019—Apr 1, 2026mine-keyed
Contested Violationscompliance · legal187Aug 13, 2013—Oct 20, 2025mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety3,973Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety856Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance3May 11, 2012—May 11, 2012mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance210Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance54Not published—Not publishedmine-keyed
Inspectionssafety · compliance168Aug 28, 2012—Oct 5, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety30Apr 22, 2021—Apr 21, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety302Apr 17, 2013—May 5, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal1,608Aug 29, 2012—Oct 8, 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.