Key Takeaway

Denniston Quarry is a active surface mine producing Stone, located in Monroe, Monroe County, MI. It has 40 violations on record (4 S&S) and $5K in proposed penalties. Operated by Michigan Materials and Aggregates Company.

Denniston Quarry

Active Surface Stone

Operator: Michigan Materials and Aggregates Company

Controller: CRH PLC

Location: Monroe, Monroe County, MI

Employees: 27

40
Violations
4
S&S Violations
9
Accidents
$5K
Penalties

Recent Violations

View all 40 →
Date Section S&S Negligence Penalty
08/12/2025 56.12068 Non-S&S LowNegligence $151
05/08/2024 56.14107(a) Non-S&S LowNegligence $147
05/08/2024 50.30(a) Non-S&S LowNegligence $147
02/27/2024 56.11001 Non-S&S LowNegligence $147
06/15/2022 56.16006 Non-S&S ModNegligence $133
06/15/2022 56.14101(a)(3) Non-S&S ModNegligence $133
11/03/2020 56.14132(b)(1) Non-S&S LowNegligence $123
09/05/2018 56.9300(b) Non-S&S ModNegligence $118
09/05/2018 46.3(b) Non-S&S ModNegligence $118
02/12/2018 56.16005 Non-S&S ModNegligence $118
08/02/2017 56.12002 Non-S&S ModNegligence $116
08/02/2017 56.20003(a) Non-S&S ModNegligence $116
08/02/2017 56.14130(c) Non-S&S ModNegligence $116
08/02/2017 56.20010 Non-S&S LowNegligence $148
08/01/2017 58.620 S&S ModNegligence $173
03/23/2017 56.12047 Non-S&S ModNegligence $148
03/22/2017 56.9300(a) Non-S&S ModNegligence $116
05/02/2016 56.4201(a)(2) Non-S&S ModNegligence $100
04/27/2016 56.4101 Non-S&S ModNegligence $100
04/26/2016 56.9300(a) S&S ModNegligence $162

Accidents & Injuries

View all 9 →
Date Classification Injury Days Lost
03/18/2015 HANDTOOLS (NONPOWERED) NO DYS AWY FRM WRK,NO RSTR ACT None
07/30/2014 OTHER INJURIES INVOLVNG NONEMPLOYEES None
07/03/2007 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY 17d lost
10/13/2004 HANDLING OF MATERIALS NO DYS AWY FRM WRK,NO RSTR ACT None
05/07/2004 SLIP OR FALL OF PERSON NO DYS AWY FRM WRK,NO RSTR ACT None
02/26/2004 MACHINERY DAYS RESTRICTED ACTIVITY ONLY 2d restricted
10/06/2003 NO VALUE FOUND NO DYS AWY FRM WRK,NO RSTR ACT None
08/13/2003 HANDTOOLS (NONPOWERED) DAYS RESTRICTED ACTIVITY ONLY 2d restricted
10/04/2000 OTHER NO DYS AWY FRM WRK,NO RSTR ACT None

Inspections

View all 51 →
Begin End Hours Inspectors
02/12/2026 02/12/2026 11.50 1
08/11/2025 08/12/2025 16.25 1
03/05/2025 03/06/2025 11.50 1
01/23/2025 01/23/2025 3.50 1
05/08/2024 05/09/2024 32.25 1
02/26/2024 02/28/2024 26.50 1
08/09/2023 08/09/2023 11.25 1
03/01/2023 03/02/2023 15.00 1
06/15/2022 06/15/2022 9.50 1
03/09/2022 03/09/2022 5.00 1

Mine Details

MSHA Mine ID2002934
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Limestone NEC
Employees27
Days/Week5.0
Hours/Shift10.0
Coordinates41.8950000, -83.4330560
Nearest TownMonroe

Frequently Asked Questions

How many MSHA violations does Denniston Quarry have?

Denniston Quarry has 40 MSHA violations on record, of which 4 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $5K.

What type of mine is Denniston Quarry?

Denniston Quarry is a Surface mine producing Stone, located in Monroe, Monroe County, MI. It currently has 27 employees.

Has anyone been injured or killed at Denniston Quarry?

According to MSHA records, Denniston Quarry has 9 reported accident/injury records and 0 fatalities on file.

Who operates Denniston Quarry?

Denniston Quarry is operated by Michigan Materials and Aggregates Company and controlled by CRH PLC. MSHA Mine ID: 2002934.