Data / Mines / Wisconsin / Green Lake County
Mines in Green Lake County, Wisconsin: 10 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 10 open mines in Green Lake County, Wisconsin, run by 7 operators and employing 29 people. Since January 1, 2022 its inspectors issued 53 citations and orders there with $7,234 in proposed penalties, and operators reported no injury or illness cases. The operators with the most open mines are Kopplin & Kinas Company Inc; Ridge Stone Products Inc; Sam Gaastra & Sons Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 10
- Operators
- 7
- Employees
- 29
- Intermittent
- 9
- Active
- 1
- Citations and orders since January 1, 2022
- 53
- Significant and substantial
- 7 (13.2%)
- Closure orders
- 0
- High negligence or reckless
- 6
- Proposed penalties
- $7,234
- Amount paid so far
- $6,781
- Inspections
- 55
- Inspector hours on site
- 319
- Citations per inspection
- 0.96 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- September 22, 2026
Operators with the most open mines in Green Lake County, Wisconsin
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Kopplin & Kinas Company Inc | 3 | 6 | 16 | $2,380 | 0 |
| Ridge Stone Products Inc | 2 | 3 | 15 | $1,468 | 0 |
| Sam Gaastra & Sons Inc | 1 | 2 | 9 | $1,529 | 0 |
| A F Gelhar Company Inc | 1 | 12 | 7 | $991 | 0 |
| Carew Concrete & Supply Company Inc | 1 | 2 | 5 | $715 | 0 |
| Michels Construction, Inc. | 1 | 2 | 1 | $151 | 0 |
| Quality Aggregate | 1 | 2 | 0 | $0 | 0 |
Operators with the most citations in Green Lake County, Wisconsin
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Kopplin & Kinas Company Inc | 3 | 6 | 16 | $2,380 | 0 |
| Ridge Stone Products Inc | 2 | 3 | 15 | $1,468 | 0 |
| Sam Gaastra & Sons Inc | 1 | 2 | 9 | $1,529 | 0 |
| A F Gelhar Company Inc | 1 | 12 | 7 | $991 | 0 |
| Carew Concrete & Supply Company Inc | 1 | 2 | 5 | $715 | 0 |
| Michels Construction, Inc. | 1 | 2 | 1 | $151 | 0 |
| Quality Aggregate | 1 | 2 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Plant 1 | Kopplin & Kinas Company Inc | Green Lake County, WI | Construction sand and gravel | 3 | 10 |
| Portable Plant #1 | Sam Gaastra & Sons Inc | Green Lake County, WI | Crushed, broken limestone | 2 | 9 |
| RSP, Lime Plant | Ridge Stone Products Inc | Green Lake County, WI | Lime | 2 | 9 |
| Markesan Plant | A F Gelhar Company Inc | Green Lake County, WI | Construction sand and gravel | 12 | 7 |
| RSP-Sand Plant | Ridge Stone Products Inc | Green Lake County, WI | Construction sand and gravel | 1 | 6 |
| Portable Crushing Plant #2 | Carew Concrete & Supply Company Inc | Green Lake County, WI | Crushed, broken limestone | 2 | 5 |
| Power Screen 1700 | Kopplin & Kinas Company Inc | Green Lake County, WI | Construction sand and gravel | 1 | 4 |
| Wash Plant | Kopplin & Kinas Company Inc | Green Lake County, WI | Construction sand and gravel | 2 | 2 |
| Manchester | Michels Construction, Inc. | Green Lake County, WI | Construction sand and gravel | 2 | 1 |
| Portable | Quality Aggregate | Green Lake County, WI | Construction sand and gravel | 2 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 7 | 70% |
| Crushed, broken limestone | 2 | 20% |
| Lime | 1 | 10% |
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 | 4 | 0 | $532 | 0 |
| 2023 | 10 | 2 | $1,430 | 0 |
| 2024 | 20 | 4 | $2,856 | 0 |
| 2025 | 16 | 1 | $1,963 | 0 |
| 2026 | 3 | 0 | $453 | 0 |
Standards cited most at mines in Green Lake County, Wisconsin
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 50.30 | Reporting of accidents, injuries and illnesses | 11 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.1000 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.44 | Hazard communication | 2 |
| 30 CFR 56.14211 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.3131 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4102 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4130 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
What the accident reports at mines in Green Lake County, Wisconsin describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Fire | 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.