MINE DETAILS
Keenesburg #2
MSHA MINE ID0505159
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Keenesburg #240.10131, -104.49237Open 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
463,855reported 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 | 72,564 | 0.00 | 127 | 1/1 mines reporting |
| 2025 Q2 | 0 | 80,180 | 0.00 | 133 | 1/1 mines reporting |
| 2025 Q3 | 0 | 82,695 | 0.00 | 135 | 1/1 mines reporting |
| 2025 Q4 | 0 | 77,426 | 0.00 | 132 | 1/1 mines reporting |
| 2026 Q1 | 0 | 75,365 | 0.00 | 130 | 1/1 mines reporting |
| 2026 Q2 | 0 | 75,625 | 0.00 | 129 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
82 significant & substantial (S&S)
Accident records
40 records classified as fatality
Proposed penalties · USD
1,233.007 of 8 violations with amounts
On-site inspection hours
69.755 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 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q2 | 2 | 0 | 316.00 | 2 | 0 | 1 | 23.3 |
| 2025-Q3 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q4 | 0 | 0 | — | 0 | 0 | 1 | 22.0 |
| 2026-Q1 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2026-Q2 | 5 | 1 | 604.00 | 1 | 0 | 1 | 20.0 |
| 2026-Q3 | 1 | 1 | 313.00 | 0 | 0 | 2 | 4.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Spot Inspection · 1.0 on-site hours
56.9101 · S&S · $313.00 proposed
103 (g) Written Notification Hazard Complaint Inspectio · 3.5 on-site hours
56.14107(a) · $151.00 proposed
56.12032 · $151.00 proposed
56.12032 · $151.00 proposed
56.12004 · S&S
Regular Safety and Health Inspection · 20.0 on-site hours
56.14100(b) · $151.00 proposed
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Driver and Passenger (IE). Both employees were wearing seat belts when traveling in a Polaris UTV. Took a corner too sharp, turned UTV onto it's side on concrete surface. Passenger sustained elbow laceration.
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was attempting to break frozen material on grizzly feeder using a 10lbs sledgehammer. When swinging the hammer, employee caught EE's right index finger. Resulted in laceration requiring 10 sutures. Employee was wearing gloves.
Regular Safety and Health Inspection · 22.0 on-site hours
POWERED HAULAGE · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Employee was driving Dingo, backed into a metal post & caught their left foot between post & equipment. EE fell to the right, landed on cement, causing a small contusion on right elbow. EE pulled themselves up, hit the Forward controller & equipment moved, releasing foot. Removed their boot, found their ankle bleeding. Was taken in to be seen. No ligament or tendons damaged.
56.14130(g) · $151.00 proposed
Regular Safety and Health Inspection · 23.3 on-site hours
56.12032 · $165.00 proposed
MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
The employee was using a hammer drill with a chipping bit to chip out concrete. The bit attached to the hammer drill got stuck in the concrete and while the employee was trying to free the stuck bit from the concrete the hammer drill kicked back and hit them in the nose. After visiting the doctor it was determined that the employee had a small fracture to their nose.
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.
—
Jamie Patterson et alcontrolsColorado Sand CompanyoperatesKeenesburg #2
msha-controller-operator-history · controller/operator co-tenure derived on mine 0505159—
Dave Patterson et alcontrolsColorado Sand CompanyoperatesKeenesburg #2
msha-controller-operator-history · controller/operator co-tenure derived on mine 0505159Other 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
8 historical accident/injury rows; 0 coded fatalities and 2 lost days across the published record.
ACCIDENT + INJURY RECORD8 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
46 violation rows across the full record; 6 carry an S&S flag and $7,988 appears in current assessed amounts.
ENFORCEMENT ACTIVITY46 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
22 personal. 1 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 EXPOSURE22 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
76K employee hours and 129 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALneutral
Contests, conferences and decisions
0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE0 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 CONTEXT5 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
14 inspection events and 314 published inspection hours across the historical record.
OVERSIGHT COVERAGE14 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 6 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 56.9101Operating speeds and control of equipment.1 recent row ↗30 CFR 56.14107Moving machine parts.1 recent row ↗30 CFR 56.12032Inspection and cover plates.3 recent rows ↗30 CFR 56.12004Electrical conductors.1 recent row ↗30 CFR 56.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 56.14130Roll-over protective structures (ROPS) and seat belts.1 recent row ↗30 CFR 56.14112Construction and maintenance of guards.1 recent row ↗30 CFR 56.4104Combustible waste.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
505841356.9101S&S
972829156.14107(a)Citation
972829056.12032Citation
972828956.12032Citation
972828856.12004S&S
972828756.14100(b)Citation
982970056.14130(g)Citation
982969956.12032Citation
Coal dust, noise and other contaminants. Silica records above ↑
Zinc oxide fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0010.00Source unit unspecified
Vanadium fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0050.00Source unit unspecified
Nickel fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0003.00Source unit unspecified
Molybdenum fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0020.00Source unit unspecified
Manganese fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0005.00Source unit unspecified
Magnesium oxide fumesWelder, etc.
C/E: 00.00Concentration: 0000.09 · limit: 0020.00Source unit unspecified
Lead fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0450.00Source unit unspecified
Iron oxide fumesWelder, etc.
C/E: 00.00Concentration: 0000.00 · limit: 0020.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
12 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors8Mar 29, 2023—May 17, 2026mine-keyed
Addresses of Recordidentity · logistics1Jan 9, 2024—Jan 9, 2024mine-keyed
Assessed Violationscompliance · legal45Jul 10, 2023—Jul 16, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal—No published rowsabsent / not applicable
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal—No published rowsabsent / not applicable
Contested Violationscompliance · legal—No published rowsabsent / not applicable
Contractor Employment and Production — Quarterlycontractors · production · safety688Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety166Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance2Oct 24, 2022—Oct 24, 2022mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance30Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance10Not published—Not publishedmine-keyed
Inspectionssafety · compliance14Jul 10, 2023—Jul 16, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety—No published rowsabsent / not applicable
Metal and Nonmetal Personal Health Sampleshealth · safety22Jan 18, 2024—Jun 12, 2025mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal46Jul 10, 2023—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.