Mark T Thorson safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Mine Idle Activity
Mark Sand & Gravel Co. Quarry · 21037070.0 on-site hours reported
Regular Safety and Health Inspection
Plant 12 · 21026455.5 on-site hours reported
Compliance Follow-up Inspection
Plant 2 · 21036600.8 on-site hours reported
Regular Safety and Health Inspection
Plant 2 · 21036604.8 on-site hours reported
Construction and maintenance of guards.
Plant 2 · 210366030 CFR 56.14112(b) · Significant and substantial (S&S) · $366.00 proposed penalty
Horns and backup alarms.
Plant 2 · 210366030 CFR 56.14132(a) · $151.00 proposed penalty
Roll-over protective structures (ROPS) and seat belts.
Plant 2 · 210366030 CFR 56.14130(g) · Significant and substantial (S&S) · $165.00 proposed penalty
Berms or guardrails.
Plant 2 · 210366030 CFR 56.9300(b) · Significant and substantial (S&S) · $151.00 proposed penalty
Safety defects; examination, correction and records.
Plant 2 · 210366030 CFR 56.14100(c) · $151.00 proposed penalty
Handrails and toeboards.
Plant 2 · 210366030 CFR 56.11002 · Significant and substantial (S&S) · $151.00 proposed penalty
Safety belts and lines.
Plant 2 · 210366030 CFR 56.15005 · Significant and substantial (S&S) · $366.00 proposed penalty
Regular Safety and Health Inspection
Portable Wash Plant · 21037044.0 on-site hours reported
Regular Safety and Health Inspection
Underwood Wash Plant · 21008574.3 on-site hours reported
Protection of power conductors from mobile equipment.
Underwood Wash Plant · 210085730 CFR 56.12005 · $151.00 proposed penalty
Regular Safety and Health Inspection
Plant 4 · 21026416.5 on-site hours reported
Regular Safety and Health Inspection
PLANT 3 · 32007007.5 on-site hours reported
Regular Safety and Health Inspection
Portable Crusher -101 · 32008055.0 on-site hours reported
Moving machine parts.
Plant 4 · 210264130 CFR 56.14107(a) · $151.00 proposed penalty
Moving machine parts.
PLANT 3 · 320070030 CFR 56.14107(a) · Significant and substantial (S&S) · $366.00 proposed penalty
Regular Safety and Health Inspection
Wipperman Pit & Plant · 32002611.8 on-site hours reported
Examination of working places.
Plant-6 · 210314530 CFR 56.18002(a) · $151.00 proposed penalty
Identification of power switches.
Plant-6 · 210314530 CFR 56.12018 · $151.00 proposed penalty
Testing grounding systems.
Plant-6 · 210314530 CFR 56.12028 · $151.00 proposed penalty
Splices and repairs of power cables.
Plant-6 · 210314530 CFR 56.12013(b) · $151.00 proposed penalty
Closure of valves.
Plant-6 · 210314530 CFR 56.4603(b) · $151.00 proposed penalty
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.