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

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.