N R Hamm Quarry LLC · Fall onto or against objects
Employee was attempting to rotate a conveyor tail pulley with a bar; the bar slipped from pulley causing employee to lunge forward hitting EE's chin on the side of conveyor frame.
Olathe Quarry Metal/Non-Metal
Martin Marietta Materials, Inc.
· Surface
Controlled by
Martin Marietta Materials Inc
Olathe,
Johnson County,
KS
·
Active
MSHA Mine ID: 1401704
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- Fatalities
- 0
- Total incidents
- 4
- Years on record
- 2014–2026
- Latest incident
- Feb 2026
Compliance record
MSHA citations since 2009
68
citations
13
significant & substantial
$22,559
proposed penalties
$18,995
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 7,537 | 0 | 0 | 0.0 |
| 2025 Q3 | 12,517 | 0 | 0 | 0.0 |
| 2025 Q2 | 9,428 | 0 | 0 | 0.0 |
| 2025 Q1 | 6 | 0 | 0 | 0.0 |
| 2024 Q4 | 6,786 | 0 | 0 | 0.0 |
| 2024 Q3 | 2,602 | 0 | 0 | 0.0 |
| 2023 Q4 | 10,287 | 5 | 0 | 486.1 |
| 2023 Q3 | 1,616 | 0 | 0 | 0.0 |
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.
Reportable incidents
4 on file2026 · 1 incident
2021 · 1 incident
October 7, 2021
KS · Metal/Non-Metal
blaster, shooter, shotfirer, explosive worker, powder gang/monkey
HANDLING OF MATERIALS
N R Hamm Quarry LLC · Over-exertion in lifting objects
We had two shots today. Halfway through the 2nd shot, I was moving the hose over some drill cutting piles and I felt pain in my scrotum. I went to the ER to be examined by a Dr. After receiving an ultrasound and CT scan, I was told I have 2 Inguinal Hernias that will require surgery to fix.
2019 · 1 incident
January 8, 2019
KS · Metal/Non-Metal
laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman
SLIP OR FALL OF PERSON
N R Hamm Quarry LLC · Over-exertion (Not Elsewhere Classified)
Slipped and lost balance causing employee to stumble backwards and twist ankle.
2014 · 1 incident
August 2, 2014
KS · Metal/Non-Metal
utility man, shift tech, service/dump truck operator
SLIP OR FALL OF PERSON
APAC-Kansas, Inc. · Fall to the walkway or working surface
Employee was using a pry bar on a lodged rock in a pulley when it come loose. The employee fell back on his left leg causing injury to the ankle.