MINE DETAILS
Weeping Water Mine
MSHA MINE ID2500998
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Weeping Water Mine40.87111, -96.12083Open 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
321,910reported 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 | 55,634 | 0.00 | 96 | 1/1 mines reporting |
| 2025 Q2 | 0 | 60,911 | 0.00 | 92 | 1/1 mines reporting |
| 2025 Q3 | 0 | 42,352 | 0.00 | 98 | 1/1 mines reporting |
| 2025 Q4 | 0 | 49,901 | 0.00 | 99 | 1/1 mines reporting |
| 2026 Q1 | 0 | 55,453 | 0.00 | 98 | 1/1 mines reporting |
| 2026 Q2 | 0 | 57,659 | 0.00 | 95 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
253 significant & substantial (S&S)
Accident records
60 records classified as fatality
Proposed penalties · USD
5,370.0023 of 25 violations with amounts
On-site inspection hours
416.0013 inspections · 13 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 | 1 | 0 | 151.00 | 1 | 0 | 2 | 45.0 |
| 2025-Q2 | 3 | 0 | 453.00 | 0 | 0 | 2 | 66.0 |
| 2025-Q3 | 1 | 0 | 193.00 | 0 | 0 | 2 | 60.8 |
| 2025-Q4 | 5 | 0 | 1,125.00 | 1 | 0 | 1 | 26.5 |
| 2026-Q1 | 8 | 2 | 2,491.00 | 1 | 0 | 3 | 84.3 |
| 2026-Q2 | 5 | 0 | 641.00 | 1 | 0 | 1 | 82.3 |
| 2026-Q3 | 2 | 1 | 316.00 | 2 | 0 | 2 | 51.3 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Compliance Follow-up Inspection · 11.3 on-site hours
57.14100(b) · S&S · $165.00 proposed
57.12008 · $151.00 proposed
Regular Safety and Health Inspection · 40.0 on-site hours
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner injured bicep while reinstalling guard. Accident became reportable when surgery was performed on the injury.
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner injured their bicep when lifting dehumidifier box. Became reportable at time of surgery on 8/18/2026
57.5001(a)/.5005
57.5001(a)/57.5005
57.14100(b) · $151.00 proposed
57.4130(b) · $245.00 proposed
57.20020 · $245.00 proposed
Regular Safety and Health Inspection · 82.3 on-site hours
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner injured EE's left elbow when a shelving unit tipped away from the wall. Became reportable on 6-29-26 when miner had surgery
Verbal Hazard Complaint Inspections · 2.0 on-site hours
Verbal Hazard Complaint Inspections · 3.0 on-site hours
57.4761(a)(2)(ii) · S&S · $1,219.00 proposed
57.14100(b) · $151.00 proposed
57.14201(b) · $151.00 proposed
57.14107(a) · $151.00 proposed
57.14110 · S&S · $366.00 proposed
57.14107(a) · $151.00 proposed
57.11002 · $151.00 proposed
57.14101(a)(3) · $151.00 proposed
Regular Safety and Health Inspection · 79.3 on-site hours
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner injured EE's knee while working on a slurry pipe. Injury became reportable on 6-11-26 when surgery was performed to repair a torn meniscus.
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.
—
Martin Marietta Materials InccontrolsMartin Marietta Materials IncoperatesWeeping Water Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2500998—
Martin Marietta Materials InccontrolsMartin Marietta AggregatesoperatesWeeping Water Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2500998Other 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
76 historical accident/injury rows; 1 coded fatalities and 1,355 lost days across the published record.
ACCIDENT + INJURY RECORD20 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
869 violation rows across the full record; 194 carry an S&S flag and $560,564 appears in current assessed amounts.
ENFORCEMENT ACTIVITY166 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
316 personal; 25 area. 38 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 EXPOSURE341 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
58K employee hours and 95 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
108 contested-violation rows, 118 civil-penalty docket/decision rows, and 57 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE283 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 CONTEXT43 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
266 inspection events and 10K published inspection hours across the historical record.
OVERSIGHT COVERAGE54 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 53 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 |
|---|---|---|---|---|---|
| 000000202602258900 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Utility Man | 0× published limitConcentration: 0000.38 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F036722 |
| 000000202600556000 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Bobcat Operator | 1× published limitConcentration: 0002.55 · limit: 0002.56Source unit unspecified | Not reported | NO ACTIONInspection F027253 |
| 000000202600538200 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Truck Driver | 0× published limitConcentration: 0000.35 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F027253 |
| 000000202600538300 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Utility Man | 0.32× published limitConcentration: 0000.58 · limit: 0001.79Source unit unspecified | Not reported | NO ACTIONInspection F027253 |
| 000000202600538400 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Scaling (mechanical) | 0× published limitConcentration: 0000.19 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F027253 |
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 57.12008Insulation and fittings for power wires and cables.1 recent row ↗30 CFR 57.5001Exposure limits for airborne contaminants.2 recent rows ↗30 CFR 57.4130Surface electric substations and liquid storage facilities.1 recent row ↗30 CFR 57.20020Unattended mine openings.1 recent row ↗30 CFR 57.4761Underground shops.1 recent row ↗30 CFR 57.14201Conveyor start-up warnings.1 recent row ↗30 CFR 57.14107Moving machine parts.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
504771757.14100(b)S&S
504771657.12008Citation
505599557.5001(a)/.5005Citation
505599457.5001(a)/57.5005Citation
505598357.14100(b)Citation
505598257.4130(b)Citation
505598157.20020Citation
505596657.4761(a)(2)(ii)S&S
Coal dust, noise and other contaminants. Silica records above ↑
Nuisance dust, total, <1% QtzSampler, Dust
C/E: 00.44Concentration: 0004.40 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzUtility Man
C/E: 00.48Concentration: 0004.79 · limit: 0010.00Source unit unspecified
TC from EC @ 160Utility Man
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Utility Man
C/E: 00.56Concentration: 0089.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONUtility Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Utility Man
C/E: 00.42Concentration: 0067.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Scoop-Tram Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Scoop-Tram Operator
C/E: 00.59Concentration: 0095.00 · 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 · contractors76May 22, 2000—Jul 9, 2026mine-keyed
Addresses of Recordidentity · logistics1Mar 12, 1984—Mar 12, 1984mine-keyed
Assessed Violationscompliance · legal851Feb 8, 2000—Jul 16, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal118Aug 1, 2001—Jan 20, 2022mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal57Jan 2, 2001—Nov 5, 2024mine-keyed
Contested Violationscompliance · legal108Aug 31, 2010—Jun 2, 2021mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety6,891Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety1,546Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance2Jun 1, 1981—May 19, 2005mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance424Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance108Not published—Not publishedmine-keyed
Inspectionssafety · compliance266Feb 7, 2000—Jul 20, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety25Sep 2, 2009—May 27, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety316Dec 7, 2000—Jul 21, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal869Feb 8, 2000—Jul 16, 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.