Carrier profile · USDOT 2114900 · MC-807519 · Updated Aug 20, 2026

Trefethen & Company LLC

DBA BADER AND OLSON CADOGAN TATE SEATTLE

6 power unitsavg 5 yrLocal · 2 statesSEATTLE, WA88/100
CARRIER ACTIVEMC-807519 ACTIVE
Verified linkstrefethenco.comFMCSA SAFER

Operations & Lanes

Where this carrier actually runs, revealed by roadside-inspection geography over the last 24 months — not where they claim to operate, shown as state-level inspection density.

Operating footprint· revealed by roadside-inspection geography

Operating radiusLocal
revealed
States observed2
US states
Inspections · 24 mo6
WA busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base
SEATTLE, WA
3430 E MARGINAL WAY S
Top corridor
WA
WA 5 · WY 1
Density
fewermore
Shade = roadside inspections, last 24 mo.

State activity ranking· all 2 states · trailing 24 mo

Roadside inspections by state · TREFETHEN & COMPANY LLC · trailing 24 months
StateCoverageInspections
WAWashingtonHQ5
WYWyoming1