Heidelberg Materials AG safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Verbal Hazard Complaint Inspections
Mitchell Plant · 12000631.5 on-site hours reported
Procedures during repairs or maintenance.
Thunder Mountain Quarry · 450112730 CFR 56.14105 · Significant and substantial (S&S) · $755.00 proposed penalty
Machinery
Mason City Plant · 1300095No dys awy frm wrk,no rstr act
Accident narrative
Employee was using an air lance with 90 psi air to clear a chute plug in the #4 Finish Mill feed chute. The employee lost grip causing the air lance to hit them in the mouth. They initially declined medical attention. On 10/24/2025, they requested to be seen at the emergency room due to mouth pain.
Verbal Hazard Complaint Inspections
Sandusky Quarry · 33001515.5 on-site hours reported
Regular Safety and Health Inspection
PIKETON SAND & GRAVEL · 330263312.0 on-site hours reported
Construction and maintenance of guards.
Gardner Quarry · 310187130 CFR 56.14112(b) · $151.00 proposed penalty
Electrical conductors.
Gardner Quarry · 310187130 CFR 56.12004 · $226.00 proposed penalty
Housekeeping.
PIKETON SAND & GRAVEL · 330263330 CFR 56.20003(a) · $151.00 proposed penalty
Construction and maintenance of guards.
PIKETON SAND & GRAVEL · 330263330 CFR 56.14112(b) · $151.00 proposed penalty
Construction and maintenance of guards.
Milton Plant · 360014130 CFR 56.14112(b) · Significant and substantial (S&S) · $288.00 proposed penalty
Handrails and toeboards.
Milton Plant · 360014130 CFR 56.11002 · $193.00 proposed penalty
Electrical conductors.
Montoursville Sand & Gravel · 360415230 CFR 56.12004 · $151.00 proposed penalty
Regular Safety and Health Inspection
UPTON QUARRY · 150004538.3 on-site hours reported
Regular Safety and Health Inspection
Gardner Quarry · 310187123.8 on-site hours reported
Regular Safety and Health Inspection
Milton Plant · 360014118.3 on-site hours reported
Requirement for container labels.
Heidelberg Materials Little River Plant · 030154130 CFR 47.41(a) · $151.00 proposed penalty
Insulation and fittings for power wires and cables.
Heidelberg Materials Little River Plant · 030154130 CFR 56.12008 · $151.00 proposed penalty
Changes; notification by operator.
McQuiston Mine · 361027330 CFR 41.12 · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
JEFFERSON QUARRY · 380023330 CFR 50.30(a) · $151.00 proposed penalty
Inspection and cover plates.
Lewisville Pit · 450329330 CFR 56.12032 · $151.00 proposed penalty
Regular Safety and Health Inspection
Heidelberg Materials Little River Plant · 030154126.5 on-site hours reported
Regular Safety and Health Inspection
Montoursville Sand & Gravel · 360415214.3 on-site hours reported
Regular Safety and Health Inspection
McQuiston Mine · 361027313.8 on-site hours reported
Regular Safety and Health Inspection
JEFFERSON QUARRY · 380023319.0 on-site hours reported
Regular Safety and Health Inspection
Thunder Mountain Quarry · 45011272.5 on-site hours reported
Sources and definitions
MSHA Violations (issue date), Accidents (accident date) and Inspections (begin date).
Violation titles use current CFR headings to identify the cited rule; they are not the inspector’s account of what happened.
Status is from the current MSHA Mines snapshot, not the selected reporting period. Closed records can retain their last reported controller/operator.
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.