Data / Mines / Wisconsin / Plant 21
Plant 21, Clark County, Wisconsin: 6 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Plant 21 is an intermittent crushed, broken limestone surface mine in Clark County, Wisconsin, operated by River City Stone Division Of Mathy Construction Co with 2 employees on MSHA's record (mine ID 4703395). Since January 1, 2022 MSHA inspectors issued 6 citations and orders there with $886 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Plant 21 (MSHA mine ID 4703395) in Clark County, Wisconsin: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4703395
- Status
- Intermittent since March 31, 2020
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Clark County, Wisconsin
- Nearest town
- Neillsville, WI
- Operator
- River City Stone Division Of Mathy Construction Co
- Parent company
- Mathy Construction Company
- Employees
- 2
- MSHA field office
- Marquette MI Field Office
- Citations and orders since January 1, 2022
- 6
- Significant and substantial
- 1 (16.7%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $886
- Amount paid so far
- $886
- Inspections
- 8
- Inspector hours on site
- 39
- Citations per inspection
- 0.75 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- October 14, 2026
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2023 | 4 | 1 | $584 | 0 |
| 2025 | 1 | 0 | $151 | 0 |
| 2026 | 1 | 0 | $151 | 0 |
Standards cited most at Plant 21
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 46.11 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
Other open mines in Clark County, Wisconsin
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Plant 22 | River City Stone Division Of Mathy Construction Co | Clark County, WI | Crushed, broken limestone | 0 | 6 |
| Stripping/Restoration #1 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 4 | 5 |
| Pine Valley | Scott Construction Inc | Clark County, WI | Construction sand and gravel | 2 | 4 |
| Portable Crusher #4 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 7 | 3 |
| Portable Crusher #1 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 5 | 3 |
| Portable Crusher #3 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 3 | 2 |
| Portable Crusher # 2 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 3 | 1 |
| Stripping/Restoring# 2 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 2 | 1 |
| Plant #90 | River City Stone Division Of Mathy Construction Co | Clark County, WI | Construction sand and gravel | 6 | 0 |
| Plant 52 | River City Stone Division Of Mathy Construction Co | Clark County, WI | Crushed, broken limestone | 2 | 0 |
| Wash Plant #2 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 1 | 0 |
| Plant #89 | River City Stone Division Of Mathy Construction Co | Clark County, WI | Construction sand and gravel | 1 | 0 |
| Wash Plant #3 | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 1 | 0 |
| Portable Screening | Haas Sons Inc | Clark County, WI | Construction sand and gravel | 1 | 0 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.