Sources: census record as of October 19, 2026; authority and insurance from FMCSA L&I, checked October 4, 2026; inspections and crashes from FMCSA SMS, checked October 4, 2026.
Quick answer
Cornerstone Excavating LLC is an interstate motor carrier in Saginaw, Texas (USDOT 4345337) with active operating authority and a self-reported fleet of 2 power units.
Key takeaways
USDOT 4345337 is registered to Cornerstone Excavating LLC, an interstate carrier based in Saginaw, TX.
MC docket number on file: MC-1810221.
Operating authority status: authorized (Common), with $1M BIPD insurance on file.
Self-reported fleet size: 2 power units and 2 drivers (FMCSA MCS-150 self-report; sanitized for plausibility).
Registered cargo types include building materials / construction, dry bulk, utility.
2 of 4Vehicle inspections with an out-of-service orderToo few inspections for a meaningful rate
0 of 4Driver inspections with an out-of-service orderToo few inspections for a meaningful rate
1Crashes on file0 fatalities · 1 injury reported
Source: FMCSA Safety Measurement System, roadside inspections and crashes over a ~24-month window, checked October 4, 2026. An out-of-service rate is the share of inspections in which a vehicle or driver was placed out of service. With few inspections, one result moves the rate a lot. FMCSA crash records include crashes regardless of fault. None of these figures is a safety rating. The official Satisfactory/Conditional/Unsatisfactory safety rating is issued separately. See SAFER.
About Cornerstone Excavating LLC
Cornerstone Excavating LLC is an interstate motor carrier based in Saginaw, Texas, registered with the FMCSA under USDOT 4345337. It holds active operating authority (MC-1810221), with $1M of BIPD insurance on file. The carrier self-reports a fleet of 2 power units and 2 drivers. Registered cargo includes building materials / construction, dry bulk, utility. Its most recent MCS-150 filing reported 89,632 mi (2025).
Before you work with this carrier
Confirm the safety rating. Authority and insurance are shown or linked above. Open the SAFER snapshot for the official safety rating and out-of-service status.
Verify insurance is current. Coverage on file can lapse; confirm active BIPD/cargo before tendering a load.
Match authority to the work. For-hire loads need active operating authority. A USDOT number alone isn't enough.