Key Takeaway

Spec Agg Quarry is a active surface mine producing Stone, located in Golden, Jefferson County, CO. It has 113 violations on record (17 S&S) and $20K in proposed penalties. Operated by Martin Marietta Materials.

Spec Agg Quarry

Active Surface Stone

Operator: Martin Marietta Materials

Controller: Martin Marietta Materials Inc

Location: Golden, Jefferson County, CO

Employees: 32

113
Violations
17
S&S Violations
46
Accidents
$20K
Penalties

Recent Violations

View all 113 →
Date Section S&S Negligence Penalty
12/08/2025 56.9300(d)(1) Non-S&S HighNegligence $366
10/07/2025 56.12004 Non-S&S LowNegligence $151
06/05/2025 56.14101(a)(3) Non-S&S LowNegligence $151
02/18/2025 56.14207 S&S HighNegligence $1,219
02/13/2025 56.12025 Non-S&S ModNegligence $151
03/18/2024 56.4104(b) Non-S&S ModNegligence $147
03/13/2024 56.14101(a)(2) Non-S&S ModNegligence $239
03/13/2024 56.12028 Non-S&S ModNegligence $147
03/13/2024 47.41(a)(1) Non-S&S ModNegligence $147
08/21/2023 56.12004 Non-S&S ModNegligence $232
08/21/2023 56.12004 Non-S&S ModNegligence $232
03/20/2023 56.12004 Non-S&S ModNegligence $143
03/15/2023 56.14115(b) Non-S&S ModNegligence $143
06/17/2022 46.5(a) S&S ModNegligence $148
06/16/2022 46.12(a)(2) S&S LowNegligence $1,358
08/04/2021 47.44(b) Non-S&S ModNegligence $125
08/04/2021 46.9(a) Non-S&S ModNegligence $125
08/03/2021 56.11012 Non-S&S ModNegligence $125
08/03/2021 56.14110 Non-S&S ModNegligence $125
08/03/2021 56.14107(a) Non-S&S ModNegligence $125

Accidents & Injuries

View all 46 →
Date Classification Injury Days Lost
04/08/2025 HANDLING OF MATERIALS NO DYS AWY FRM WRK,NO RSTR ACT None
12/10/2024 SLIP OR FALL OF PERSON NO DYS AWY FRM WRK,NO RSTR ACT None
08/06/2024 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 49d restricted
12/02/2023 HANDTOOLS (NONPOWERED) DYS AWY FRM WRK & RESTRCTD ACT None
10/13/2023 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 7d restricted
08/29/2023 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 21d restricted
01/01/2021 HANDLING OF MATERIALS NO DYS AWY FRM WRK,NO RSTR ACT None
07/31/2019 MACHINERY NO DYS AWY FRM WRK,NO RSTR ACT None
06/26/2019 HANDLING OF MATERIALS DAYS RESTRICTED ACTIVITY ONLY 4d restricted
02/25/2019 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 5d restricted

Inspections

View all 77 →
Begin End Hours Inspectors
02/09/2026 02/09/2026 7.00 1
12/08/2025 12/08/2025 7.00 1
10/06/2025 10/08/2025 35.50 1
09/02/2025 09/02/2025 5.75 1
07/10/2025 07/10/2025 2.00 1
06/24/2025 06/24/2025 3.75 1
06/04/2025 06/05/2025 14.50 1
02/13/2025 02/20/2025 34.25 1
01/03/2025 01/03/2025 4.25 1
11/13/2024 11/13/2024 3.50 1

Mine Details

MSHA Mine ID0500860
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Sandstone
Employees32
Days/Week6.0
Hours/Shift16.0
Coordinates39.7077780, -105.2069440
Nearest TownGolden

Frequently Asked Questions

How many MSHA violations does Spec Agg Quarry have?

Spec Agg Quarry has 113 MSHA violations on record, of which 17 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $20K.

What type of mine is Spec Agg Quarry?

Spec Agg Quarry is a Surface mine producing Stone, located in Golden, Jefferson County, CO. It currently has 32 employees.

Has anyone been injured or killed at Spec Agg Quarry?

According to MSHA records, Spec Agg Quarry has 46 reported accident/injury records and 0 fatalities on file.

Who operates Spec Agg Quarry?

Spec Agg Quarry is operated by Martin Marietta Materials and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 0500860.