Coal production
0reported short tons
ACTIVE / CONTROLLER PORTFOLIO
Dunn Investment Company
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA CONTROLLER ID0169081
MINE PORTFOLIO
4 of 4 mines and facilities
2025-01-01 – 2026-10-13. Active records; production reporting is not required.
Material, method and type filters apply to this table. The portfolio’s status applies to the entire page. GEM fields describe their own release, not the selected MSHA year.
| Mine | Location / type | Coal · short tons | Hours worked | Violations | Accident records | On-site inspection hours |
|---|---|---|---|---|---|---|
| Dunn Construction Company0103347 · Active6/8 quarters reported | Elmore, ALSurface · MSHA: Crushed, Broken Granite | 0 | 63,035 | 2 | 0 | 12.3 |
| Hard Rock Sand and Gravel1601553 · Active6/8 quarters reported | Washington, LASurface · MSHA: Construction Sand and Gravel | 0 | 24,742 | 14 | 0 | 31.0 |
| MMC Materials, Inc.2200478 · Active6/8 quarters reported | Lafayette, MSSurface · MSHA: Construction Sand and Gravel | 0 | 13,235 | 0 | 0 | 27.8 |
| RockCo Mining LLC-Batesville2200817 · Active6/8 quarters reported | Panola, MSSurface · MSHA: Sand, Industrial NEC | 0 | 48,273 | 9 | 0 | 25.0 |
Production and hours sum available quarterly reports. — means unavailable; zero safety records means none in the selected imported period. Ownership reflects the current MSHA record.
LOCATION
Portfolio map
4 of 4 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Dunn Construction Company32.73444, -86.26972Open map ↗
- Hard Rock Sand and Gravel30.99028, -90.12417Open map ↗
- MMC Materials, Inc.34.38472, -89.49861Open map ↗
- RockCo Mining LLC-Batesville34.24389, -89.87500Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. All 4 mines listed under this controller were checked; 4 have reports in the available quarters. Totals use current ownership.
Hours worked
149,285reported 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 | 25,033 | 0.00 | 46 | 4/4 mines reporting |
| 2025 Q2 | 0 | 21,797 | 0.00 | 42 | 4/4 mines reporting |
| 2025 Q3 | 0 | 21,269 | 0.00 | 49 | 4/4 mines reporting |
| 2025 Q4 | 0 | 24,761 | 0.00 | 44 | 4/4 mines reporting |
| 2026 Q1 | 0 | 26,516 | 0.00 | 50 | 4/4 mines reporting |
| 2026 Q2 | 0 | 29,909 | 0.00 | 53 | 4/4 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
2513 significant & substantial (S&S)
Accident records
00 records classified as fatality
Proposed penalties · USD
20,138.0020 of 25 violations with amounts
On-site inspection hours
96.0020 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 | 1 | 1 | 1,219.00 | 0 | 0 | 2 | 5.5 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 2 | 11.3 |
| 2025-Q3 | 5 | 3 | 7,747.00 | 0 | 0 | 2 | 15.0 |
| 2025-Q4 | 7 | 2 | 2,945.00 | 0 | 0 | 3 | 15.3 |
| 2026-Q1 | 1 | 1 | 151.00 | 0 | 0 | 3 | 10.3 |
| 2026-Q2 | 4 | 2 | 4,903.00 | 0 | 0 | 1 | 7.3 |
| 2026-Q3 | 6 | 3 | 3,173.00 | 0 | 0 | 5 | 13.5 |
| 2026-Q4 * | 1 | 1 | — | 0 | 0 | 2 | 18.0 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- RockCo Mining LLC-Batesville · 2200817
Regular Safety and Health Inspection · 4.5 on-site hours
- RockCo Mining LLC-Batesville · 2200817
56.14132(a) · S&S
- MMC Materials, Inc. · 2200478
Regular Safety and Health Inspection · 13.5 on-site hours
- RockCo Mining LLC-Batesville · 2200817
103 (g) Written Notification Hazard Complaint Inspectio · 0.0 on-site hours
- RockCo Mining LLC-Batesville · 2200817
Spot Inspection · 0.0 on-site hours
- RockCo Mining LLC-Batesville · 2200817
56.14211(b)
- RockCo Mining LLC-Batesville · 2200817
56.14112(b) · S&S
- RockCo Mining LLC-Batesville · 2200817
56.12016 · S&S
- Dunn Construction Company · 0103347
Regular Safety and Health Inspection · 0.0 on-site hours
- Dunn Construction Company · 0103347
56.14107(a)
- RockCo Mining LLC-Batesville · 2200817
Regular Safety and Health Inspection · 9.3 on-site hours
- RockCo Mining LLC-Batesville · 2200817
56.12028 · $151.00 proposed
- RockCo Mining LLC-Batesville · 2200817
56.14100(c) · S&S · $3,022.00 proposed
- MMC Materials, Inc. · 2200478
Regular Safety and Health Inspection · 4.3 on-site hours
- Hard Rock Sand and Gravel · 1601553
56.14100(b) · S&S · $1,037.00 proposed
- Hard Rock Sand and Gravel · 1601553
Regular Safety and Health Inspection · 7.3 on-site hours
- Hard Rock Sand and Gravel · 1601553
56.14100(b) · $209.00 proposed
- Hard Rock Sand and Gravel · 1601553
56.4104(b) · $209.00 proposed
- Hard Rock Sand and Gravel · 1601553
56.9300(b) · S&S · $3,448.00 proposed
- MMC Materials, Inc. · 2200478
Regular Safety and Health Inspection · 3.0 on-site hours
- Hard Rock Sand and Gravel · 1601553
103 (g) Written Notification Hazard Complaint Inspectio · 3.3 on-site hours
- Dunn Construction Company · 0103347
Regular Safety and Health Inspection · 4.0 on-site hours
- Dunn Construction Company · 0103347
56.9300(b) · S&S · $151.00 proposed
- RockCo Mining LLC-Batesville · 2200817
Compliance Follow-up Inspection · 0.0 on-site hours
- Hard Rock Sand and Gravel · 1601553
Regular Safety and Health Inspection · 7.0 on-site hours
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.
SELECTED PORTFOLIO
3 linked operators.
Relationships reflect the selected mine status and current MSHA controller/operator fields.