Key Takeaway

Warren Quarry is a active surface mine producing Stone, located in Warren, Carbon County, MT. It has 133 violations on record (23 S&S) and $18K in proposed penalties. Operated by Montana Limestone Company.

Warren Quarry

Active Surface Stone

Operator: Montana Limestone Company

Controller: Basin Electric Power Cooperative

Location: Warren, Carbon County, MT

Employees: 17

133
Violations
23
S&S Violations
22
Accidents
$18K
Penalties

Recent Violations

View all 133 →
Date Section S&S Negligence Penalty
12/16/2025 56.15001 Non-S&S LowNegligence $151
08/12/2025 56.4201(a)(2) Non-S&S LowNegligence $151
10/23/2024 56.12002 Non-S&S ModNegligence $147
08/28/2024 47.44(b) Non-S&S ModNegligence $147
08/28/2024 56.12028 Non-S&S ModNegligence $147
08/28/2024 56.12018 Non-S&S ModNegligence $147
03/12/2024 56.14207 Non-S&S ModNegligence $147
03/12/2024 56.14107(a) S&S ModNegligence $204
03/12/2024 56.11001 S&S ModNegligence $147
03/12/2024 56.14107(a) Non-S&S ModNegligence $147
03/12/2024 56.12032 Non-S&S ModNegligence $147
03/12/2024 56.14107(a) Non-S&S ModNegligence $147
08/10/2022 56.12004 Non-S&S ModNegligence $133
08/09/2022 56.9300(b) S&S ModNegligence $183
02/02/2022 56.11001 S&S ModNegligence $407
08/25/2021 56.16009 Non-S&S LowNegligence $125
01/13/2021 56.11012 Non-S&S ModNegligence $125
10/25/2017 56.14101(a)(2) S&S LowNegligence $116
10/25/2017 56.4201(a)(2) Non-S&S LowNegligence $116
02/28/2017 56.20003(a) Non-S&S ModNegligence $116

Accidents & Injuries

View all 22 →
Date Classification Injury Days Lost
09/27/2022 SLIP OR FALL OF PERSON DAYS AWAY FROM WORK ONLY 14d lost
01/27/2022 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 1d lost, 4d restricted
08/29/2019 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY 12d lost
07/30/2019 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 91d lost, 36d restricted
12/19/2018 ALL OTHER OCCUPATIONAL ILLNESSES OCCUPATNAL ILLNESS NOT DEG 1-6 None
06/01/2018 SLIP OR FALL OF PERSON NO DYS AWY FRM WRK,NO RSTR ACT None
05/08/2018 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 222d lost, 33d restricted
02/20/2018 SLIP OR FALL OF PERSON NO DYS AWY FRM WRK,NO RSTR ACT None
01/19/2018 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 178d lost, 17d restricted
03/07/2017 SLIP OR FALL OF PERSON DAYS AWAY FROM WORK ONLY 5d lost

Inspections

View all 61 →
Begin End Hours Inspectors
12/16/2025 12/19/2025 30.50 1
08/11/2025 08/12/2025 20.00 1
10/23/2024 10/24/2024 20.50 1
08/27/2024 08/28/2024 19.25 1
03/11/2024 03/14/2024 43.00 1
07/19/2023 07/21/2023 19.25 1
03/08/2023 03/09/2023 28.50 2
08/09/2022 08/11/2022 30.75 2
01/31/2022 02/03/2022 21.50 1
08/25/2021 08/25/2021 11.50 1

Mine Details

MSHA Mine ID2402306
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Limestone NEC
Employees17
Days/Week5.0
Hours/Shift10.0
Coordinates45.0663890, -108.6716670
Nearest TownWarren

Frequently Asked Questions

How many MSHA violations does Warren Quarry have?

Warren Quarry has 133 MSHA violations on record, of which 23 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $18K.

What type of mine is Warren Quarry?

Warren Quarry is a Surface mine producing Stone, located in Warren, Carbon County, MT. It currently has 17 employees.

Has anyone been injured or killed at Warren Quarry?

According to MSHA records, Warren Quarry has 22 reported accident/injury records and 0 fatalities on file.

Who operates Warren Quarry?

Warren Quarry is operated by Montana Limestone Company and controlled by Basin Electric Power Cooperative. MSHA Mine ID: 2402306.