Carrier profile · USDOT 1883548 · Updated Jun 13, 2026
DAVID S WILLIAMSON
DBA UNITED SEED ASSOCIATES
1 power unitsVIBORG, SD50/100
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
- 211 N MAPLE ST, VIBORG, SD, 57070
- Operation
- Interstate
Contact
- Phone
- (605) 766-5110
- Cell
- (605) 366-5558
- Fax
- (605) 766-4491
- dwstauff@iw.net
- Web domain
- iw.net
Registration
- Officer
- David Williamson
- USDOT / docket
- 1883548
- First registered
- Apr 29, 2009
- Last MCS-150
- Aug 30, 2024 · 27,540 mi (2023)
- 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.