New Miami Plant Metal/Non-Metal

Martin Marietta Materials Inc · Surface

Willamsdale, Butler County, OH · Active

MSHA Mine ID: 3304383

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Compliance record

MSHA citations since 2024

citations

significant & substantial

$164

proposed penalties

$164

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	Per 1M hrs
2025 Q4	2,271	0	0.0
2025 Q3	2,773	0	0.0
2025 Q2	3,051	0	0.0
2025 Q1	2,095	0	0.0
2024 Q4	2,416	0	0.0
2024 Q2	3,231	1	309.5
2024 Q1	1,184	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

April 11, 2024 OH · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS

Martin Marietta Materials Inc · Over-exertion in lifting objects

Employee was shoveling material into a bucket and strained lower back