Key Takeaway

Penrose Ranch Gravel Pit is a active surface mine producing SandAndGravel, located in Florence, Fremont County, CO. It has 124 violations on record (25 S&S) and $37K in proposed penalties. Operated by Martin Marietta Materials Inc..

Penrose Ranch Gravel Pit

Active Surface SandAndGravel

Operator: Martin Marietta Materials Inc.

Controller: Martin Marietta Materials Inc

Location: Florence, Fremont County, CO

Employees: 11

124
Violations
25
S&S Violations
1
Accidents
$37K
Penalties

Recent Violations

View all 124 →
Date Section S&S Negligence Penalty
11/06/2025 56.12008 Non-S&S ModNegligence $193
11/06/2025 56.14100(b) Non-S&S ModNegligence $151
04/15/2025 56.14132(b)(1) Non-S&S ModNegligence $151
04/15/2025 56.14101(a)(2) Non-S&S ModNegligence $151
07/12/2024 56.14101(a)(3) Non-S&S LowNegligence $147
07/12/2024 56.16005 Non-S&S ModNegligence $204
07/11/2024 56.12004 Non-S&S ModNegligence $204
02/27/2024 56.12004 Non-S&S ModNegligence $147
02/22/2023 56.20003(a) Non-S&S LowNegligence $143
02/22/2023 46.5(a) Non-S&S HighNegligence $182
11/02/2021 56.16005 Non-S&S ModNegligence $125
11/02/2021 56.4101 Non-S&S ModNegligence $125
11/02/2021 46.9(c)(4) Non-S&S ModNegligence $125
04/07/2021 46.3(b)(4) Non-S&S LowNegligence $125
02/17/2021 56.12004 Non-S&S ModNegligence $146
02/16/2021 56.4101 Non-S&S ModNegligence $125
06/24/2020 56.14107(a) Non-S&S ModNegligence $123
06/23/2020 56.16009 Non-S&S LowNegligence $123
06/23/2020 56.14201(b) Non-S&S LowNegligence $123
06/23/2020 56.14107(a) Non-S&S ModNegligence $123

Accidents & Injuries

View all 1 →
Date Classification Injury Days Lost
11/15/2016 STEPPING OR KNEELING ON OBJECT DYS AWY FRM WRK & RESTRCTD ACT 2d lost, 16d restricted

Inspections

View all 58 →
Begin End Hours Inspectors
11/06/2025 11/12/2025 20.00 1
04/14/2025 04/17/2025 22.50 1
01/06/2025 01/07/2025 17.00 1
07/11/2024 07/12/2024 17.50 1
05/22/2024 05/22/2024 1.25 1
02/27/2024 02/28/2024 26.00 1
07/18/2023 07/18/2023 8.00 1
02/21/2023 02/22/2023 22.25 1
06/02/2022 06/06/2022 22.75 1
03/22/2022 03/23/2022 16.00 1

Mine Details

MSHA Mine ID0504509
Mine TypeSurface
StatusActive
CommoditySandAndGravel
SIC DescriptionConstruction Sand and Gravel
Employees11
Days/Week5.0
Hours/Shift11.0
Coordinates38.3538890, -105.0302780
Nearest TownFlorence

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Frequently Asked Questions

How many MSHA violations does Penrose Ranch Gravel Pit have?

Penrose Ranch Gravel Pit has 124 MSHA violations on record, of which 25 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $37K.

What type of mine is Penrose Ranch Gravel Pit?

Penrose Ranch Gravel Pit is a Surface mine producing SandAndGravel, located in Florence, Fremont County, CO. It currently has 11 employees.

Has anyone been injured or killed at Penrose Ranch Gravel Pit?

According to MSHA records, Penrose Ranch Gravel Pit has 1 reported accident/injury records and 0 fatalities on file.

Who operates Penrose Ranch Gravel Pit?

Penrose Ranch Gravel Pit is operated by Martin Marietta Materials Inc. and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 0504509.