Carrier profile · USDOT 3355483 · MC-1073091 · Updated Jun 13, 2026

CORNERSTONE PLUMBING LLC

1 power unitSPOKANE VALLEY, WA50/100
AUTHORITY STATUS UNKNOWNMC-1073091 STATUS UNKNOWN
Verified linksFMCSA 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.

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

Home base
SPOKANE VALLEY, WA
703 S PROGRESS RD
Density
fewermore
Shade = roadside inspections, last 24 mo.