O'BRIEN ROCK COMPANY INC
SAINT PAUL, KS
06/22/1993
72
Power Units
58
Drivers
Current
as of today
Active · 72 power units · 58 drivers · Saint Paul, KS
2026
~Apr 2026
Officer change
DWAYNE O'BRIEN, MICHAEL O'BRIEN → DWAYNE O'BRIEN, KYLE O'BRIEN
Mar 16, 2026
MCS-150 biennial update filed
Reported mileage: 1,089,317 (2025)
Reported power units: 72
Reported drivers: 58
Reported trailers: 18
2024
Jun 10, 2024
MCS-150 biennial update filed
Reported mileage: 864,449 (2023)
Reported power units: 69 → 72
Reported drivers: 54 → 58
Reported trailers: 18
~Mar 2024
Email changed
obrienreadymix@gmail.com → megan@obrienreadymix.com
2023
Jun 16, 2023
MCS-150 biennial update filed
Reported mileage: 775,080 (2021)
Reported power units: 70 → 69
Reported drivers: 54
2022
Jun 8, 2022
MCS-150 biennial update filed
Reported mileage: 775,080 (2021)
Reported power units: 66 → 70
Reported drivers: 54
Jan 28, 2022
MCS-150 biennial update filed
Reported mileage: 661,985 (2021)
Reported power units: 72 → 66
Reported drivers: 50 → 54
2021
Apr 26, 2021
MCS-150 biennial update filed
Reported mileage: 285,268 (2018)
Reported power units: 65 → 72
Reported drivers: 50
2020
Oct 26, 2020
MCS-150 biennial update filed
Reported mileage: 285,268 (2018)
Reported power units: 65
Reported drivers: 50
2006
May 26, 2006
Safety rating: Satisfactory
1993
Jun 22, 1993
DOT registered
Company registered with the FMCSA.