Carrier profile · USDOT 1396146 · Updated Jun 13, 2026
SIERRA INSULATION CO INC
11 power unitsLocal · 1 statesAUBURN, CA100/100
AUTHORITY STATUS UNKNOWN
Identity & Federal
The official FMCSA identity — legal name, DBA, addresses, contact, officers, and registration — alongside the daily-captured federal-record activity feed, monitored daily by Vektor.
Location
- Physical address
- 2025 AIRPARK CT STE 50, AUBURN, CA, 95602
- Operation
- Interstate
Contact
- Phone
- (530) 889-2186
- Fax
- (530) 889-2199
- Web domain
- sierrainsulationco.com
Registration
- Officers
- Tim Williams · Corey Williams
- USDOT / docket
- 1396146
- First registered
- Jul 18, 2005
- Last MCS-150
- Apr 16, 2026 · 250,000 mi (2024)
- FMCSA safety rating
- Not rated
- Recordable crash rate
- 0.00
- D-U-N-S
- —
Fleet (self-reported · MCS-150)
—CDL drivers
MCS-150 filing history· biennial-update cadence
Per-filing MCS-150 history (each biennial update + the fleet/mileage it reported) is being captured from the daily federal feed and will appear here as we capture the full history.
Federal record activity· monitored daily by Vektor
No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.