Key Takeaway

Sioux Rock Quarry is a intermittent surface mine producing SandAndGravel, located in Comfery, Brown County, MN. It has 7 violations on record (0 S&S) and $598 in proposed penalties. Operated by Martin Marietta Materials Inc..

Sioux Rock Quarry

Intermittent Surface SandAndGravel

Operator: Martin Marietta Materials Inc.

Controller: Martin Marietta Materials Inc

Location: Comfery, Brown County, MN

Employees: 2

7
Violations
0
S&S Violations
1
Accidents
$598
Penalties

Recent Violations

View all 7 →
Date Section S&S Negligence Penalty
05/07/2018 56.12004 Non-S&S ModNegligence $118
03/26/2013 56.1000 Non-S&S ModNegligence $100
07/14/2009 56.14107(a) Non-S&S LowNegligence $100
07/14/2009 56.12028 Non-S&S LowNegligence $100
08/02/2005 56.14107(a) Non-S&S HighNegligence $60
08/02/2005 56.4101 Non-S&S HighNegligence $60
08/02/2005 56.14107(a) Non-S&S HighNegligence $60

Accidents & Injuries

View all 1 →
Date Classification Injury Days Lost
01/05/2015 DISORDERS (REPEATED TRAUMA) OCCUPATNAL ILLNESS NOT DEG 1-6 None

Inspections

View all 23 →
Begin End Hours Inspectors
09/22/2025 09/23/2025 21.50 1
09/30/2020 09/30/2020 1.50 1
08/06/2020 08/06/2020 3.25 1
03/25/2019 03/25/2019 6.50 1
05/23/2018 05/23/2018 6.75 1
05/07/2018 05/07/2018 7.25 1
07/12/2017 07/12/2017 5.25 1
07/25/2016 07/26/2016 5.25 1
11/04/2014 11/05/2014 14.50 1
09/09/2014 09/09/2014 3.25 1

Mine Details

MSHA Mine ID2103504
Mine TypeSurface
StatusIntermittent
CommoditySandAndGravel
SIC DescriptionConstruction Sand and Gravel
Employees2
Days/Week5.0
Hours/Shift8.0
Coordinates44.0850000, -93.0602780
Nearest TownComfery

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Frequently Asked Questions

How many MSHA violations does Sioux Rock Quarry have?

Sioux Rock Quarry has 7 MSHA violations on record, of which 0 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $598.

What type of mine is Sioux Rock Quarry?

Sioux Rock Quarry is a Surface mine producing SandAndGravel, located in Comfery, Brown County, MN. It currently has 2 employees.

Has anyone been injured or killed at Sioux Rock Quarry?

According to MSHA records, Sioux Rock Quarry has 1 reported accident/injury records and 0 fatalities on file.

Who operates Sioux Rock Quarry?

Sioux Rock Quarry is operated by Martin Marietta Materials Inc. and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 2103504.