Data / Mines / Yahara Materials Inc
Yahara Materials Inc: 14 open mines, 66 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Yahara Materials Inc (MSHA operator ID L00965) operates 14 open mines with 54 employees in Wisconsin, mostly crushed, broken limestone. Since January 1, 2022 MSHA inspectors issued it 66 citations and orders with $10,254 in proposed penalties, and it reported no injury or illness cases. Data from MSHA, November 6, 2026.
The request: Watch Yahara Materials Inc (MSHA operator ID L00965): each new citation, each accident report and each new mine. $10 of work on sign-up, no card.
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- MSHA operator ID
- L00965
- Open mines
- 14
- Employees at open mines
- 54
- States
- Wisconsin
- Citations and orders since January 1, 2022
- 66
- Significant and substantial
- 7 (10.6%)
- Closure orders
- 0
- High negligence or reckless
- 8
- Proposed penalties
- $10,254
- Amount paid so far
- $10,254
- Inspections
- 95
- Inspector hours on site
- 228
- Citations per inspection
- 0.69 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- October 22, 2026
Open mines of Yahara Materials Inc
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Unit No 1 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 10 |
| Unit No. 14 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 8 |
| Unit No. 16 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 6 |
| Unit No. 3 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 5 |
| Unit No. 5 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 5 |
| Unit No. 7 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 5 |
| Unit No. 12 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 5 |
| Unit No. 19 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 4 |
| Plant #20 | Yahara Materials Inc | Dane County, WI | Construction sand and gravel | 2 | 4 |
| Unit No. 23 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 4 |
| Unit No. 2 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 3 |
| Unit No. 6 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 3 |
| Unit No. 21 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 28 | 2 |
| Unit No. 22 | Yahara Materials Inc | Dane County, WI | Crushed, broken limestone | 2 | 2 |
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 |
|---|---|---|---|---|
| 2022 | 19 | 2 | $2,527 | 0 |
| 2023 | 12 | 2 | $2,122 | 0 |
| 2024 | 13 | 2 | $2,121 | 0 |
| 2025 | 9 | 1 | $2,427 | 0 |
| 2026 | 13 | 0 | $1,057 | 0 |
Standards cited most at Yahara Materials Inc
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 56.14107 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 4 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 3 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.3131 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12023 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.15001 | Surface metal and nonmetal mines | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Crushed, broken limestone | 13 |
| Construction sand and gravel | 1 |
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.