Coal production
0reported short tons
ACTIVE / OPERATOR PORTFOLIO
Halquist Stone Company
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA OPERATOR IDL00976
MINE PORTFOLIO
8 of 8 mines and facilities
2025-01-01 – 2026-10-18. 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 |
|---|---|---|---|---|---|---|
| Fond du Lac Stone Quarry4703530 · Active6/8 quarters reported | Fond Du Lac, WISurface · MSHA: Dimension Limestone | 0 | 15,194 | 0 | 0 | 12.3 |
| Halquist Stone Company Cawley's Quarry4703291 · Active6/8 quarters reported | Waukesha, WISurface · MSHA: Crushed, Broken Limestone NEC | 0 | 6,874 | 1 | 1 | 15.3 |
| Halquist Stone Company - Chilton Quarry4703139 · Active6/8 quarters reported | Calumet, WISurface · MSHA: Crushed, Broken Limestone NEC | 0 | 92,894 | 0 | 2 | 15.8 |
| Halquist Stone Company-Fond duLac Quarry4703138 · Active6/8 quarters reported | Dodge, WISurface · MSHA: Crushed, Broken Limestone NEC | 0 | 53,620 | 1 | 2 | 26.3 |
| Halquist Stone Company-Ideal Quarry4701255 · Active6/8 quarters reported | Waukesha, WISurface · MSHA: Crushed, Broken Limestone NEC | 0 | 11,858 | 0 | 0 | 10.3 |
| Halquist Stone Company-Lannon Quarry4700218 · Active6/8 quarters reported | Waukesha, WISurface · MSHA: Crushed, Broken Limestone NEC | 0 | 6,511 | 0 | 0 | 18.0 |
| Hamilton Quarry4703664 · Active6/8 quarters reported | Fond Du Lac, WISurface · MSHA: Dimension Limestone | 0 | 111,728 | 2 | 3 | 23.8 |
| North Lake Pit4700942 · Active6/8 quarters reported | Waukesha, WISurface · MSHA: Construction Sand and Gravel | 0 | 16,204 | 6 | 0 | 29.0 |
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
8 of 8 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Fond du Lac Stone Quarry43.79194, -88.46944Open map ↗
- Halquist Stone Company Cawley's Quarry43.14833, -88.16333Open map ↗
- Halquist Stone Company - Chilton Quarry43.97000, -88.19250Open map ↗
- Halquist Stone Company-Fond duLac Quarry43.58750, -88.53139Open map ↗
- Halquist Stone Company-Ideal Quarry43.14361, -88.18306Open map ↗
- Halquist Stone Company-Lannon Quarry43.14833, -88.15500Open map ↗
- Hamilton Quarry43.69972, -88.44000Open map ↗
- North Lake Pit43.16611, -88.36417Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. All 8 mines listed under this operator were checked; 8 have reports in the available quarters. Totals use current ownership.
Hours worked
314,883reported 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 | 38,981 | 0.00 | 92 | 8/8 mines reporting |
| 2025 Q2 | 0 | 58,395 | 0.00 | 95 | 8/8 mines reporting |
| 2025 Q3 | 0 | 57,964 | 0.00 | 103 | 8/8 mines reporting |
| 2025 Q4 | 0 | 56,435 | 0.00 | 97 | 8/8 mines reporting |
| 2026 Q1 | 0 | 43,585 | 0.00 | 96 | 8/8 mines reporting |
| 2026 Q2 | 0 | 59,523 | 0.00 | 101 | 8/8 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
101 significant & substantial (S&S)
Accident records
80 records classified as fatality
Proposed penalties · USD
2,056.0010 of 10 violations with amounts
On-site inspection hours
150.5026 inspections · 26 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 | 0 | 0 | 1 | 5.3 |
| 2025-Q2 | 0 | 0 | — | 2 | 0 | 4 | 15.3 |
| 2025-Q3 | 3 | 0 | 453.00 | 1 | 0 | 5 | 31.5 |
| 2025-Q4 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q1 | 6 | 1 | 1,452.00 | 4 | 0 | 9 | 58.5 |
| 2026-Q2 | 0 | 0 | — | 1 | 0 | 2 | 13.8 |
| 2026-Q3 | 0 | 0 | — | 0 | 0 | 5 | 26.3 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Hamilton Quarry · 4703664
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was splitting stone with hammer and chisel. The Chisel slipped in EE's hand, and EE accidentally struck EE's thumb with the hammer.
- Halquist Stone Company-Fond duLac Quarry · 4703138
FALLING/SLIDING/ROLLING MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was inspecting engine bay on loader. Shocks on engine bay door loader failed. Overhead door fell and hit EE on top of the head.
- Halquist Stone Company-Lannon Quarry · 4700218
Spot Inspection · 7.8 on-site hours
- Hamilton Quarry · 4703664
Regular Safety and Health Inspection · 2.0 on-site hours
- Halquist Stone Company-Fond duLac Quarry · 4703138
HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY
Accident narrative
EE chiseling pieces off standing stone, piece of stone fell towards loader and EE attempted to hold it up by pulling towards them causing a back strain
- Halquist Stone Company - Chilton Quarry · 4703139
Regular Safety and Health Inspection · 3.0 on-site hours
- Halquist Stone Company-Fond duLac Quarry · 4703138
Regular Safety and Health Inspection · 8.3 on-site hours
- North Lake Pit · 4700942
56.12004 · $151.00 proposed
- North Lake Pit · 4700942
47.44(b) · $151.00 proposed
- North Lake Pit · 4700942
56.14107(a) · $151.00 proposed
- North Lake Pit · 4700942
Regular Safety and Health Inspection · 10.5 on-site hours
- Hamilton Quarry · 4703664
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EE pushing stone off forks onto a pallet and felt abdomen pain.
- Fond du Lac Stone Quarry · 4703530
Regular Safety and Health Inspection · 2.3 on-site hours
- Halquist Stone Company-Lannon Quarry · 4700218
Regular Safety and Health Inspection · 3.3 on-site hours
- Hamilton Quarry · 4703664
HANDLING OF MATERIALS · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
EE lifting stone in quarry, stone shifted and pinched finger between stone and quarry floor.
- Halquist Stone Company-Ideal Quarry · 4701255
Regular Safety and Health Inspection · 5.0 on-site hours
- Halquist Stone Company Cawley's Quarry · 4703291
Regular Safety and Health Inspection · 4.8 on-site hours
- Halquist Stone Company-Fond duLac Quarry · 4703138
Regular Safety and Health Inspection · 5.3 on-site hours
- Halquist Stone Company-Fond duLac Quarry · 4703138
56.12004 · $151.00 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.
SELECTED PORTFOLIO
1 linked controller.
Relationships reflect the selected mine status and current MSHA controller/operator fields.