Data / Mines / Wisconsin / Plant #79
Plant #79, Monroe County, Wisconsin: 0 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Plant #79 is an intermittent construction sand and gravel surface mine in Monroe County, Wisconsin, operated by River City Stone Division Of Mathy Construction Co with 1 employee on MSHA's record (mine ID 4703610). Since January 1, 2022 MSHA inspectors issued 0 citations and orders there with $0 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Plant #79 (MSHA mine ID 4703610) in Monroe County, Wisconsin: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4703610
- Status
- Intermittent since June 22, 2011
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Monroe County, Wisconsin
- Nearest town
- Sparta
- Operator
- River City Stone Division Of Mathy Construction Co
- Parent company
- Mathy Construction Company
- Employees
- 1
- MSHA field office
- Peru IL Field Office
- Citations and orders since January 1, 2022
- 0
- Inspections
- 7
- Inspector hours on site
- 28
- Citations per inspection
- 0.00 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- March 24, 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 | 0 | 0 | $0 | 1 |
Injury and illness cases at Plant #79
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| No lost time, or an occupational illness | 1 |
What the accident reports at Plant #79 describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handtools (nonpowered) | 1 |
Equipment named in accident reports at Plant #79
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 1 |
Other open mines in Monroe County, Wisconsin
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Tunnel City | Iron Oak Sand LLC | Monroe County, WI | Construction sand and gravel | 12 | 55 |
| Smart Sand, Inc. | Smart Sand, Inc | Monroe County, WI | Sand, industrial | 50 | 31 |
| HC Wyeville Mine | HC Wyeville Operating LLC | Monroe County, WI | Sand, industrial | 30 | 23 |
| Sparta, WI Plant | U.S. Silica Energy Company | Monroe County, WI | Sand, industrial | 2 | 7 |
| Gerke Plant #1 | Gerke Excavating Inc | Monroe County, WI | Crushed, broken limestone | 1 | 7 |
| Mack Quarry | Brooks Excavating LLC | Monroe County, WI | Sand, common | 2 | 6 |
| Gerke Plant #6 | Gerke Excavating Inc | Monroe County, WI | Crushed, broken limestone | 3 | 5 |
| Plant #32 | River City Stone Division Of Mathy Construction Co | Monroe County, WI | Crushed, broken limestone | 8 | 4 |
| Gerke Plant #3 | Gerke Excavating Inc | Monroe County, WI | Crushed, broken limestone | 4 | 4 |
| Sparta Plant | Carri Scharf Materials | Monroe County, WI | Sand, industrial | 3 | 3 |
| Gerke Plant #4 | Gerke Excavating Inc | Monroe County, WI | Crushed, broken limestone | 3 | 2 |
| Gerke Plant #7 | Gerke Excavating Inc | Monroe County, WI | Crushed, broken limestone | 3 | 2 |
| Plant # 21 | Gerke Excavating Inc | Monroe County, WI | Construction sand and gravel | 2 | 1 |
| Gerke Plant #22 | Gerke Excavating Inc | Monroe County, WI | Crushed, broken limestone | 2 | 0 |
| Gerke Plant #24 | Gerke Excavating Inc | Monroe County, WI | Sand, common | 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.