Superior Plant Metal/Non-Metal

Thumb Aggregate Sales LLC · Surface

Controlled by Charles E Stringer

Cass City, Tuscola County, MI · Intermittent

MSHA Mine ID: 2003275

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Compliance record

MSHA citations since 2004

114

citations

significant & substantial

$24,754

proposed penalties

$23,630

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Citations	S&S	Per 1M hrs
2025 Q4	152	0	0	0.0
2025 Q3	556	0	0	0.0
2025 Q2	795	0	0	0.0
2025 Q1	245	0	0	0.0
2024 Q4	488	6	1	12295.1
2024 Q3	555	0	0	0.0
2024 Q2	759	0	0	0.0
2024 Q1	180	0	0	0.0

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

1 on file

February 13, 2023 MI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS

Thumb Aggregate Sales LLC · Caught in, under or between a moving and a stationary object

Mine Operator locked. The bottom of the conveyor, went underneath, and the conveyor tipped