Thunder Stone Quarry LLC safety activity
MSHA violations, accident reports and inspections.
Safety activity
Regular Safety and Health Inspection
7.3 on-site hours reported
Construction and maintenance of guards.
30 CFR 56.14112(b) · Significant and substantial (S&S)
Identification of power switches.
30 CFR 56.12018
Construction and maintenance of guards.
30 CFR 56.14112(b)
Access to stationary electrical equipment or switchgear.
30 CFR 56.12019
Identification of power switches.
30 CFR 56.12018
Safe access.
30 CFR 56.11001
Housekeeping.
30 CFR 56.20003(a)
Handrails and toeboards.
30 CFR 56.11002
Berms or guardrails.
30 CFR 56.9300(a) · Significant and substantial (S&S)
Circuit overload protection.
30 CFR 56.12001 · $336.00 proposed penalty
Handrails and toeboards.
30 CFR 56.11002 · $226.00 proposed penalty
Construction and maintenance of guards.
30 CFR 56.14112(a)(1) · $336.00 proposed penalty
Construction and maintenance of guards.
30 CFR 56.14112(a)(1) · $336.00 proposed penalty
Construction and maintenance of guards.
30 CFR 56.14112(a)(1) · $336.00 proposed penalty
Regular Safety and Health Inspection
2.8 on-site hours reported
Compliance Follow-up Inspection
0.5 on-site hours reported
Compliance Follow-up Inspection
1.0 on-site hours reported
Regular Safety and Health Inspection
20.8 on-site hours reported
Safety defects; examination, correction and records.
30 CFR 56.14100(b) · $226.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 56.14100(b) · $226.00 proposed penalty
Construction and maintenance of guards.
30 CFR 56.14112(a)(1) · $336.00 proposed penalty
Electrical conductors.
30 CFR 56.12004 · $226.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 56.14100(b) · $226.00 proposed penalty
Barricades and warning signs.
30 CFR 56.20011 · $226.00 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.
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.