Carrier profile · USDOT 2590148 · Updated Aug 20, 2026
Dewayne Kolb
DBA SEVEN DIAMOND CONSTRUCTION
1 power unitDUBLIN, TX50/100
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
- 827 PRESTON LN, DUBLIN, TX, 76446
- Mailing address
- PO BOX 331, DUBLIN, TX, 76446
- Operation
- Interstate
Contact
- Phone
- (325) 660-3449
Registration
- Officer
- Dewayne Kolb
- USDOT / docket
- 2590148
- First registered
- Mar 17, 2015
- Last MCS-150
- Jun 21, 2018 · 20,000 mi (2018)
- FMCSA safety rating
- Not rated
- D-U-N-S
- —
Fleet (self-reported · MCS-150)
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.