Key Takeaway
Barnhart Quarry is a active surface mine producing Stone, located in Barnhart, Jefferson County, MO. It has 111 violations on record (23 S&S) and $21K in proposed penalties. Operated by New Frontier Materials Operations Alpha, LLC.
Barnhart Quarry
Operator: New Frontier Materials Operations Alpha, LLC
Controller: RWNIH-OP Holdings LLC; PEPI Capital, L.P.; 42 North Resources Partners I
Location: Barnhart, Jefferson County, MO
Employees: 32
Recent Violations
View all 111 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/19/2026 | 56.15005 | S&S | ModNegligence | $0 |
| 02/19/2026 | 56.15001 | Non-S&S | ModNegligence | $0 |
| 02/18/2026 | 56.14100(b) | Non-S&S | ModNegligence | $0 |
| 08/19/2025 | 56.9300(a) | S&S | ModNegligence | $0 |
| 08/19/2025 | 56.14100(b) | Non-S&S | ModNegligence | $151 |
| 08/19/2025 | 56.14100(b) | Non-S&S | ModNegligence | $151 |
| 02/25/2025 | 56.4201(a)(1) | Non-S&S | ModNegligence | $209 |
| 02/25/2025 | 56.14100(b) | Non-S&S | ModNegligence | $209 |
| 06/05/2024 | 56.14107(a) | Non-S&S | ModNegligence | $147 |
| 06/05/2024 | 56.12008 | Non-S&S | ModNegligence | $147 |
| 06/05/2024 | 56.14107(a) | Non-S&S | ModNegligence | $147 |
| 06/05/2024 | 56.14112(a)(1) | Non-S&S | ModNegligence | $147 |
| 06/05/2024 | 56.14107(a) | S&S | ModNegligence | $305 |
| 06/05/2024 | 56.12004 | Non-S&S | ModNegligence | $147 |
| 02/15/2024 | 56.14112(a) | Non-S&S | ModNegligence | $147 |
| 02/15/2024 | 56.14112(b) | Non-S&S | ModNegligence | $147 |
| 02/15/2024 | 56.20003(a) | Non-S&S | ModNegligence | $147 |
| 02/13/2024 | 56.12004 | Non-S&S | ModNegligence | $147 |
| 02/13/2024 | 56.12004 | Non-S&S | ModNegligence | $147 |
| 02/13/2024 | 56.14100(b) | Non-S&S | ModNegligence | $147 |
Accidents & Injuries
View all 8 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 09/24/2024 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 64d restricted |
| 02/27/2024 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 36d restricted |
| 04/22/2022 | MACHINERY | DAYS AWAY FROM WORK ONLY | 5d lost |
| 11/03/2021 | POWERED HAULAGE | DYS AWY FRM WRK & RESTRCTD ACT | 209d lost, 20d restricted |
| 06/02/2021 | POWERED HAULAGE | DYS AWY FRM WRK & RESTRCTD ACT | 25d lost, 17d restricted |
| 03/15/2019 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 2d lost |
| 11/20/2018 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 22d lost, 22d restricted |
| 04/30/2015 | MACHINERY | DAYS AWAY FROM WORK ONLY | 1d lost |
Inspections
View all 37 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/18/2026 | 02/24/2026 | 28.25 | 1 |
| 08/19/2025 | 08/22/2025 | 27.75 | 1 |
| 02/25/2025 | 02/25/2025 | 11.75 | 1 |
| 06/04/2024 | 06/06/2024 | 18.50 | 1 |
| 05/22/2024 | 05/22/2024 | 1.50 | 1 |
| 02/12/2024 | 02/16/2024 | 30.50 | 1 |
| 06/06/2023 | 06/07/2023 | 26.00 | 1 |
| 05/17/2023 | 05/17/2023 | 1.25 | 1 |
| 11/29/2022 | 11/30/2022 | 28.00 | 1 |
| 08/03/2022 | 08/05/2022 | 25.50 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Barnhart Quarry have?
Barnhart Quarry has 111 MSHA violations on record, of which 23 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $21K.
What type of mine is Barnhart Quarry?
Barnhart Quarry is a Surface mine producing Stone, located in Barnhart, Jefferson County, MO. It currently has 32 employees.
Has anyone been injured or killed at Barnhart Quarry?
According to MSHA records, Barnhart Quarry has 8 reported accident/injury records and 0 fatalities on file.
Who operates Barnhart Quarry?
Barnhart Quarry is operated by New Frontier Materials Operations Alpha, LLC and controlled by RWNIH-OP Holdings LLC; PEPI Capital, L.P.; 42 North Resources Partners I. MSHA Mine ID: 2302469.