Key Takeaway

Plant 21 is a intermittent surface mine producing Stone, located in Neillsville, WI, Clark County, WI. It has 149 violations on record (41 S&S) and $39K in proposed penalties. Operated by Milestone Materials.

Plant 21

Intermittent Surface Stone

Operator: Milestone Materials

Controller: Mathy Construction Company

Location: Neillsville, WI, Clark County, WI

Employees: 2

149
Violations
41
S&S Violations
1
Accidents
$39K
Penalties

Recent Violations

View all 149 →
Date Section S&S Negligence Penalty
08/07/2025 50.30(a) Non-S&S ModNegligence $151
11/28/2023 56.11001 S&S ModNegligence $155
08/01/2023 56.20003(a) Non-S&S ModNegligence $143
08/01/2023 56.4201(a)(1) Non-S&S ModNegligence $143
08/01/2023 56.14132(a) Non-S&S ModNegligence $143
10/06/2021 56.12032 Non-S&S LowNegligence $125
10/06/2021 56.12008 Non-S&S LowNegligence $125
10/06/2021 56.4102 Non-S&S LowNegligence $125
10/06/2021 56.14107(a) Non-S&S ModNegligence $125
10/06/2021 56.14100(c) S&S ModNegligence $125
10/06/2021 56.12004 Non-S&S LowNegligence $125
10/05/2021 56.14105 Non-S&S LowNegligence $125
10/05/2021 56.14100(b) Non-S&S LowNegligence $125
10/05/2021 56.14100(c) Non-S&S LowNegligence $125
10/05/2021 56.14100(d) Non-S&S ModNegligence $125
05/04/2021 50.30(a) Non-S&S ModNegligence $125
05/03/2021 56.11012 S&S ModNegligence $125
05/03/2021 56.14107(a) Non-S&S ModNegligence $125
05/03/2021 56.12032 Non-S&S ModNegligence $125
04/28/2020 56.12004 Non-S&S ModNegligence $123

Accidents & Injuries

View all 1 →
Date Classification Injury Days Lost
07/09/2019 SLIP OR FALL OF PERSON DYS AWY FRM WRK & RESTRCTD ACT 23d lost, 33d restricted

Inspections

View all 44 →
Begin End Hours Inspectors
08/06/2025 08/07/2025 9.75 1
11/28/2023 11/28/2023 27.25 1
08/07/2023 08/07/2023 5.00 1
08/01/2023 08/01/2023 6.50 1
06/27/2022 06/27/2022 5.75 1
03/21/2022 03/21/2022 3.25 1
10/05/2021 10/14/2021 36.75 1
09/28/2021 09/28/2021 9.00 1
05/03/2021 05/04/2021 14.75 1
05/05/2020 05/05/2020 5.25 1

Mine Details

MSHA Mine ID4703395
Mine TypeSurface
StatusIntermittent
CommodityStone
SIC DescriptionCrushed, Broken Limestone NEC
Employees2
Days/Week5.0
Hours/Shift10.0
Coordinates44.5600000, -90.5961110
Nearest TownNeillsville, WI

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Frequently Asked Questions

How many MSHA violations does Plant 21 have?

Plant 21 has 149 MSHA violations on record, of which 41 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $39K.

What type of mine is Plant 21?

Plant 21 is a Surface mine producing Stone, located in Neillsville, WI, Clark County, WI. It currently has 2 employees.

Has anyone been injured or killed at Plant 21?

According to MSHA records, Plant 21 has 1 reported accident/injury records and 0 fatalities on file.

Who operates Plant 21?

Plant 21 is operated by Milestone Materials and controlled by Mathy Construction Company. MSHA Mine ID: 4703395.