Granite Canyon Quarry
Active
Surface
Stone
Operator: Martin Marietta Materials
Controller: Martin Marietta Materials Inc
Location: Granite Canyon, Laramie County, WY
Employees: 42
218
Violations
41
S&S Violations
28
Accidents
$62K
Penalties
Recent Violations
View all 218 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 10/29/2025 | 56.16005 | Non-S&S | ModNegligence | $245 |
| 10/23/2025 | 56.14205 | Non-S&S | ModNegligence | $245 |
| 10/21/2025 | 56.14130(i) | Non-S&S | ModNegligence | $1,431 |
| 08/19/2025 | 56.14107(a) | Non-S&S | ModNegligence | $151 |
| 08/19/2025 | 56.14201(b) | S&S | ModNegligence | $549 |
| 08/19/2025 | 56.12018 | Non-S&S | ModNegligence | $245 |
| 08/13/2025 | 56.12023 | S&S | ModNegligence | $1,219 |
| 08/13/2025 | 56.4500 | Non-S&S | ModNegligence | $151 |
| 08/12/2025 | 56.14207 | Non-S&S | ModNegligence | $151 |
| 08/12/2025 | 56.4101 | Non-S&S | ModNegligence | $151 |
| 08/12/2025 | 56.14132(a) | Non-S&S | ModNegligence | $151 |
| 10/16/2024 | 56.12004 | Non-S&S | ModNegligence | $147 |
| 10/15/2024 | 56.11002 | Non-S&S | ModNegligence | $239 |
| 10/09/2024 | 56.14107(a) | Non-S&S | ModNegligence | $147 |
| 10/08/2024 | 56.18002(b) | Non-S&S | ModNegligence | $147 |
| 10/08/2024 | 56.11002 | Non-S&S | ModNegligence | $147 |
| 10/07/2024 | 56.11002 | Non-S&S | ModNegligence | $147 |
| 04/11/2024 | 56.4601 | Non-S&S | ModNegligence | $147 |
| 11/21/2023 | 56.14112(a)(1) | Non-S&S | ModNegligence | $143 |
| 11/21/2023 | 56.11001 | Non-S&S | ModNegligence | $143 |
Accidents & Injuries
View all 28 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 10/23/2022 | HANDLING OF MATERIALS | ALL OTHER CASES (INCL 1ST AID) | None |
| 09/26/2022 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 2d lost, 49d restricted |
| 06/22/2022 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 04/06/2022 | OTHER | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 12/17/2021 | HANDLING OF MATERIALS | PERM TOT OR PERM PRTL DISABLTY | 161d lost, 21d restricted |
| 01/27/2020 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 5d restricted |
| 11/18/2019 | POWERED HAULAGE | DAYS AWAY FROM WORK ONLY | 177d lost |
| 08/29/2019 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 7d restricted |
| 07/10/2019 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 21d restricted |
| 07/07/2019 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 5d restricted |
Inspections
View all 69 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 10/21/2025 | 10/29/2025 | 58.75 | 1 |
| 08/12/2025 | 08/19/2025 | 49.25 | 2 |
| 07/29/2025 | 07/29/2025 | 15.00 | 1 |
| 10/07/2024 | 10/21/2024 | 66.00 | 1 |
| 05/22/2024 | 05/22/2024 | 3.00 | 1 |
| 04/10/2024 | 04/15/2024 | 24.25 | 1 |
| 11/21/2023 | 11/22/2023 | 21.00 | 1 |
| 08/15/2023 | 08/17/2023 | 29.25 | 1 |
| 03/13/2023 | 03/16/2023 | 36.25 | 1 |
| 09/22/2022 | 09/23/2022 | 13.00 | 1 |
Mine Details
MSHA Mine ID4800018
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Granite
Employees42
Days/Week5.0
Hours/Shift10.0
Coordinates41.1011110, -105.1733330
Nearest TownGranite Canyon
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Frequently Asked Questions
How many MSHA violations does Granite Canyon Quarry have?
Granite Canyon Quarry has 218 MSHA violations on record, of which 41 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $62K.
What type of mine is Granite Canyon Quarry?
Granite Canyon Quarry is a Surface mine producing Stone, located in Granite Canyon, Laramie County, WY. It currently has 42 employees.
Has anyone been injured or killed at Granite Canyon Quarry?
According to MSHA records, Granite Canyon Quarry has 28 reported accident/injury records and 0 fatalities on file.
Who operates Granite Canyon Quarry?
Granite Canyon Quarry is operated by Martin Marietta Materials and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 4800018.