MINE DETAILS
HOCKLEY MINE
MSHA MINE ID4102478
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- HOCKLEY MINE29.96472, -95.83889Open 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
187,489reported 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 | 31,608 | 0.00 | 65 | 1/1 mines reporting |
| 2025 Q2 | 0 | 31,256 | 0.00 | 62 | 1/1 mines reporting |
| 2025 Q3 | 0 | 31,640 | 0.00 | 60 | 1/1 mines reporting |
| 2025 Q4 | 0 | 29,757 | 0.00 | 60 | 1/1 mines reporting |
| 2026 Q1 | 0 | 31,600 | 0.00 | 56 | 1/1 mines reporting |
| 2026 Q2 | 0 | 31,628 | 0.00 | 57 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
293 significant & substantial (S&S)
Accident records
50 records classified as fatality
Proposed penalties · USD
5,242.0028 of 29 violations with amounts
On-site inspection hours
218.757 inspections · 7 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 | 11 | 2 | 1,996.00 | 2 | 0 | 1 | 43.3 |
| 2025-Q2 | 3 | 0 | 453.00 | 1 | 0 | 1 | 34.3 |
| 2025-Q3 | 5 | 0 | 772.00 | 0 | 0 | 1 | 33.3 |
| 2025-Q4 | 4 | 1 | 1,150.00 | 0 | 0 | 1 | 26.0 |
| 2026-Q1 | 3 | 0 | 453.00 | 0 | 0 | 1 | 22.8 |
| 2026-Q2 | 2 | 0 | 418.00 | 0 | 0 | 1 | 24.8 |
| 2026-Q3 | 1 | 0 | — | 2 | 0 | 1 | 34.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee was walking around a work table in the shop and their right foot slipped resulting in the employee falling onto the left knee. Resulted in a fracture on the patella
HOISTING · ACCIDENT ONLY
Accident narrative
Hoistman went to dump the skip and thought EE wasn't up very far and decided to go down to see on the camera if the skip was full. Lowered the skip and the door was partially opened and caught on a cross member and broke it.
57.4101
Regular Safety and Health Inspection · 34.5 on-site hours
57.20003(c) · $209.00 proposed
57.3200 · $209.00 proposed
Regular Safety and Health Inspection · 24.8 on-site hours
57.12028 · $151.00 proposed
57.12028 · $151.00 proposed
57.14116(a) · $151.00 proposed
Regular Safety and Health Inspection · 22.8 on-site hours
57.12025 · $151.00 proposed
57.12025 · $151.00 proposed
57.20003(a) · S&S · $697.00 proposed
57.12023 · $151.00 proposed
Regular Safety and Health Inspection · 26.0 on-site hours
57.11012 · $151.00 proposed
56.14107(a) · $151.00 proposed
47.41(a) · $151.00 proposed
48.7(a) · $168.00 proposed
Regular Safety and Health Inspection · 33.3 on-site hours
56.14100(c) · $151.00 proposed
HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY
Accident narrative
Hand Scaling on JLG rock fell and struck employee.
56.4201(a)(2) · $151.00 proposed
47.41(a) · $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.
—
Texas United CorpcontrolsUnited Salt Hockley, LLCoperatesHOCKLEY MINE
msha-controller-operator-history · controller/operator co-tenure derived on mine 4102478—
Texas United CorpcontrolsUnited Salt CorporationoperatesHOCKLEY MINE
msha-controller-operator-history · controller/operator co-tenure derived on mine 4102478Other 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
73 historical accident/injury rows; 1 coded fatalities and 453 lost days across the published record.
ACCIDENT + INJURY RECORD14 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
577 violation rows across the full record; 121 carry an S&S flag and $202,987 appears in current assessed amounts.
ENFORCEMENT ACTIVITY126 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
125 personal; 8 area. 0 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 EXPOSURE133 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
32K employee hours and 57 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
157 contested-violation rows, 156 civil-penalty docket/decision rows, and 35 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE348 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 CONTEXT3 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
162 inspection events and 7K published inspection hours across the historical record.
OVERSIGHT COVERAGE28 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 1 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 57.4101Warning signs.1 recent row ↗30 CFR 57.20003Housekeeping.2 recent rows ↗30 CFR 57.3200Correction of hazardous conditions.1 recent row ↗30 CFR 57.12028Testing grounding systems.2 recent rows ↗30 CFR 57.14116Hand-held power tools.1 recent row ↗30 CFR 57.12025Grounding circuit enclosures.2 recent rows ↗30 CFR 57.12023Guarding electrical connections and resistor grids.1 recent row ↗30 CFR 57.11012Protection for openings around travelways.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
500553457.4101Citation
517463657.20003(c)Citation
517463557.3200Citation
500096357.12028Citation
500096257.12028Citation
500096157.14116(a)Citation
500094357.12025Citation
500094257.12025Citation
Coal dust, noise and other contaminants. Silica records above ↑
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: 00.88Concentration: 0140.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Front-end Loader Operator
C/E: 00.66Concentration: 0105.00 · limit: 0160.00Source unit unspecified
Unlisted Particulate, total, <1% QtzPipe Fitter/Millright/Plumber
C/E: 00.00Concentration: 0000.44 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzFront-end Loader Operator
C/E: 00.00Concentration: 0001.22 · limit: 0000.00Source unit unspecified
Unlisted Particulate, total, <1% QtzScreen/Scalper Operator
C/E: 00.00Concentration: 0009.90 · limit: 0000.00Source unit unspecified
TC from EC @ 160Truck Driver
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 · contractors73Apr 25, 2000—Sep 15, 2026mine-keyed
Addresses of Recordidentity · logistics1Aug 28, 1978—Aug 28, 1978mine-keyed
Assessed Violationscompliance · legal568Aug 9, 2000—May 12, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal156Apr 25, 2011—May 26, 2020mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal35Sep 21, 2001—Jul 28, 2025mine-keyed
Contested Violationscompliance · legal157Dec 8, 2009—Dec 11, 2019mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety241Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety48Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance2Jan 1, 1950—Jan 1, 2014mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance423Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance108Not published—Not publishedmine-keyed
Inspectionssafety · compliance162Feb 22, 2000—Sep 8, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety8Jun 15, 2022—May 13, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety125Nov 15, 2001—May 13, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal577Aug 9, 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.