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
Operator: Martin Marietta Materials
Controller: Martin Marietta Materials Inc
Location: Golden, Jefferson County, CO
Employees: 32
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
Related Mines
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.