Plant #79 Metal/Non-Metal

Milestone Materials Division of Mathy Construction · Surface

Controlled by Mathy Construction Company

Sparta, Monroe County, WI · Intermittent

MSHA Mine ID: 4703610

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Compliance record

MSHA citations since 2011

citations

significant & substantial

$737

proposed penalties

$737

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Per 1M hrs
2025 Q4	1,369	0.0
2025 Q1	1	0.0
2024 Q3	1,396	0.0
2024 Q2	0
2023 Q4	1,055	0.0
2023 Q2	1,681	0.0
2023 Q1	20	0.0
2022 Q4	1,524	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

August 31, 2023 WI · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)

Milestone Materials Division of Mathy Construction · Caught in, under or between a moving and a stationary object

Finger was pinched when wrench slipped resulting in a laceration to the left index finger tip. Took 6 stitches to close wound.