Tunnel City
Active
Surface
SandAndGravel
Operator: Iron Oak Sand LLC
Controller: Iron Oak Energy Solutions LLC
Location: Tunnel City, Monroe County, WI
Employees: 12
165
Violations
28
S&S Violations
44
Accidents
$41K
Penalties
Recent Violations
View all 165 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 03/03/2026 | 56.12004 | Non-S&S | LowNegligence | $0 |
| 12/09/2025 | 56.4101 | Non-S&S | ModNegligence | $151 |
| 12/03/2025 | 56.14100(b) | Non-S&S | LowNegligence | $151 |
| 04/16/2025 | 56.12018 | Non-S&S | ModNegligence | $151 |
| 04/16/2025 | 56.12018 | Non-S&S | ModNegligence | $151 |
| 04/16/2025 | 56.12032 | Non-S&S | LowNegligence | $151 |
| 01/28/2025 | 56.9101 | S&S | LowNegligence | $1,126 |
| 11/06/2024 | 56.12032 | Non-S&S | ModNegligence | $151 |
| 10/30/2024 | 47.44(b) | Non-S&S | ModNegligence | $151 |
| 10/29/2024 | 56.9300(a) | Non-S&S | ModNegligence | $151 |
| 10/29/2024 | 56.12023 | Non-S&S | ModNegligence | $151 |
| 08/29/2024 | 50.30(a) | Non-S&S | HighNegligence | $147 |
| 08/29/2024 | 56.14100(b) | Non-S&S | ModNegligence | $172 |
| 08/29/2024 | 56.12032 | Non-S&S | ModNegligence | $172 |
| 08/28/2024 | 56.12018 | Non-S&S | ModNegligence | $147 |
| 08/27/2024 | 56.14100(c) | Non-S&S | ModNegligence | $147 |
| 08/27/2024 | 56.4102 | Non-S&S | ModNegligence | $147 |
| 08/27/2024 | 56.16001 | Non-S&S | ModNegligence | $147 |
| 08/27/2024 | 56.14100(c) | Non-S&S | LowNegligence | $147 |
| 08/27/2024 | 56.14100(c) | Non-S&S | LowNegligence | $147 |
Accidents & Injuries
View all 44 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 10/29/2025 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 09/07/2025 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/03/2025 | MACHINERY | DAYS RESTRICTED ACTIVITY ONLY | 27d restricted |
| 09/01/2024 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 28d lost, 33d restricted |
| 08/02/2024 | POWERED HAULAGE | DAYS RESTRICTED ACTIVITY ONLY | 3d restricted |
| 06/19/2024 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 10d lost, 66d restricted |
| 12/21/2023 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 1d lost |
| 07/18/2023 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 29d lost, 130d restricted |
| 04/13/2023 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/24/2023 | OTHER | INJURIES DUE TO NATURAL CAUSES | None |
Inspections
View all 49 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/02/2026 | 0.00 | 0 | |
| 12/01/2025 | 12/11/2025 | 67.75 | 1 |
| 04/17/2025 | 04/17/2025 | 1.00 | 1 |
| 04/14/2025 | 04/18/2025 | 52.50 | 1 |
| 01/27/2025 | 01/29/2025 | 12.50 | 1 |
| 12/04/2024 | 12/04/2024 | 14.25 | 1 |
| 10/29/2024 | 11/07/2024 | 54.25 | 1 |
| 09/12/2024 | 09/12/2024 | 10.50 | 1 |
| 08/26/2024 | 08/30/2024 | 102.00 | 2 |
| 01/16/2024 | 01/24/2024 | 69.75 | 1 |
Mine Details
MSHA Mine ID4703699
Mine TypeSurface
StatusActive
CommoditySandAndGravel
SIC DescriptionConstruction Sand and Gravel
Employees12
Days/Week5.0
Hours/Shift8.0
Coordinates44.0083330, -90.5669440
Nearest TownTunnel City
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Frequently Asked Questions
How many MSHA violations does Tunnel City have?
Tunnel City has 165 MSHA violations on record, of which 28 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $41K.
What type of mine is Tunnel City?
Tunnel City is a Surface mine producing SandAndGravel, located in Tunnel City, Monroe County, WI. It currently has 12 employees.
Has anyone been injured or killed at Tunnel City?
According to MSHA records, Tunnel City has 44 reported accident/injury records and 0 fatalities on file.
Who operates Tunnel City?
Tunnel City is operated by Iron Oak Sand LLC and controlled by Iron Oak Energy Solutions LLC. MSHA Mine ID: 4703699.