MAINLINE UNDERGROUND CORPORATION

USDOT 4270233 · Brighton, CO · Underwriter-grade risk snapshot

Operating statusActive

Lead priorityUnknown

Fleet5 power units · 5 drivers (5 trucks)

OperationC · PRIVATE PROPERTY

Current insurer—

Crashes / Inspections (24 mo)0 / 4

	Vehicle	Driver
This carrier	50.0% (2/4)	0.0% (0/4)
National average	22.3%	6.7%

⚠️ Above national average. Carriers with high OOS rates face premium surcharges and are more likely to shop for new insurance.

Address599 S MAIN ST
BRIGHTON CO 80601-3044

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Power units5

Drivers5 (5 CDL)

MCS-150 mileage95,000 (2024)

MCS-150 filedMar 3, 2025

HazmatN

Total inspections4

Out-of-service3

Vehicle OOS rate75.0%

Driver OOS rate0.0%

Total violations6

OOS violations0

Total crashes0

Fatal crashes0

Injuries0

Insurance agent? MAINLINE UNDERGROUND CORPORATION — get the full CO lead list.

Data as of Thu Oct 15 2026 00:00:00 GMT+0000 (Coordinated Universal Time). Source: FMCSA public filings, refreshed daily by Insight Carrier.