WASTE CONNECTIONS OF WYOMING INC
dba KEIFFER SANITATION
CASPER, WY
01/13/1999
41
Power Units
25
Drivers
Current
as of today
Active · 41 power units · 25 drivers · Casper, WY
2026
Jan 28, 2026
MCS-150 biennial update filed
Reported mileage: 580,000 (2025)
Reported power units: 41
Reported drivers: 22 → 25
~Jan 2026
Officer change
SHAWN MANDEL → MARK CERESA, BRANDON LEONARD
Jan 23, 2026
MCS-150 biennial update filed
Reported mileage: 580,000 (2025)
Reported power units: 38 → 41
Reported drivers: 22
2024
Jan 17, 2024
MCS-150 biennial update filed
Reported mileage: 440,000 (2023)
Reported power units: 38
Reported drivers: 25 → 22
2022
Mar 21, 2022
MCS-150 biennial update filed
Reported mileage: 440,000 (2021)
Reported power units: 38
Reported drivers: 25
2020
Nov 5, 2020
MCS-150 biennial update filed
Reported mileage: 438,746 (2019)
Reported power units: 38
Reported drivers: 25
1999
Jan 13, 1999
DOT registered
Company registered with the FMCSA.