Data / Mines / Wisconsin / Markesan Plant
Markesan Plant: 7 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Markesan Plant is an active construction sand and gravel surface mine in Green Lake County, Wisconsin, operated by A F Gelhar Company Inc with 12 employees on MSHA's record (mine ID 4701964). Since January 1, 2022 MSHA inspectors issued 7 citations and orders there with $991 in proposed penalties, and 1 accident report was filed there, with no injury or illness cases.
The request: Watch Markesan Plant (MSHA mine ID 4701964) in Green Lake County, Wisconsin: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4701964
- Status
- Active since April 22, 1987
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Green Lake County, Wisconsin
- Nearest town
- Markesan, WI
- Operator
- A F Gelhar Company Inc
- Employees
- 12
- MSHA field office
- Peru IL Field Office
- Citations and orders since January 1, 2022
- 7
- Significant and substantial
- 1 (14.3%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $991
- Amount paid so far
- $991
- Inspections
- 9
- Inspector hours on site
- 152
- Citations per inspection
- 0.78 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- June 29, 2026
- Citations issued to contractors here
- 7 ($1,037 proposed)
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 | 1 | 0 | $133 | 0 |
| 2023 | 6 | 1 | $858 | 0 |
Standards cited most at Markesan Plant
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 56.14132 | 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 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
What the accident reports at Markesan Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Fire | 1 |
Other open mines in Green Lake County, Wisconsin
| 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 |
| 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 |
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.