Carrier profile · USDOT 4270233 · Updated Jul 18, 2026

MAINLINE UNDERGROUND CORPORATION

5 power unitsLocal · 1 statesBRIGHTON, CO50/100

AUTHORITY STATUS UNKNOWN

Observed fleet · trailing 24 mo daily

5Power units

4 observed · MCS-150

4Trailers seen

Decoded · vPIC

7.9Avg age (yr)

2004–2024 · vPIC

Call dispatch(720) 980-1466 Email dispatchmichelle.salas@szt-ml.com

Click to see how we scored it

Load decision · FMCSA snapshot · Jul 18, 2026

Limited record

Not enough federal record to assess. Verify authority and insurance directly.

Not enough inspection history to rate

Watch · 1

Not enough inspection history to rate4 federal roadside inspections in the last 24 months. FMCSA itself will not score a carrier's vehicle or driver record on fewer than 5, and neither will we — verify authority, insurance and references directly before tendering.

In good standing · 0

Nothing flagged.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo

50.0

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo

50.0

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Small fleet

5 power units. Brokers price each fleet type apart.

Fleet age vs peersDecoding

—

Not yet decoded

Identity stabilityStable

2 yr unchanged

Same registration since 2024 — no chameleon / reincarnation signal.

Safety

4 inspections · 24 mo · vs national benchmarks

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 50.0%24-mo cumulative

050%nat'l 22.26%

Driver OOS 0.0%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 4 vehicle and 4 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

50.0% · latest 6-mo window

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. More resolved windows are needed to establish a trend. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24-mo monthly · vehicle / driver level · any-OOS overlay

4 inspections · 24 mo · busiest month Mar '25 · 2

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections over 24 months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Expected band

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.4 / unit·yr

thin signalabundant signal

Roadside-inspection volume is about what you'd expect for a 5-unit fleet — enough signal to read the safety record, though not a heavy sample.

Registered power units: 5
Inspections · 24 mo: 4
Annualized: ≈2 / yr
Coverage: ≈0.4 inspections / unit · yr

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

393.100 Cargo securement (general)Vehicle Maintenance2 · 2 OOS
393.9 Inoperative required lampsVehicle Maintenance2 · 0 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance2 · 0 OOS
392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving1 · 0 OOS
393.43 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 1 OOS
393.81 HornVehicle Maintenance1 · 0 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & insurance

Can they legally + adequately haul your load?

Insurance continuity· insurer · policy · lapses

No insurance filing history on record.

This timeline is the FMCSA filing history, and it ends at the most recent superseded filing — current policy status is not tracked here. Request a certificate of insurance to confirm active coverage before tendering.

Explore full authority & insurance record

Equipment & fleet

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 5
Observed power (24 mo): 4
Trailers (towed): 4

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & lanes

Revealed by inspection density across 1 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusLocal

revealed

States observed

US states

Inspections · 24 mo

CO busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

BRIGHTON, CO

599 S MAIN ST

Top corridor

CO 4

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & fraud

Affiliated entities & reincarnation signals · for review, not a verdict

No shared-VIN flow in the last 12 months

None of this carrier's trucks were inspected under another USDOT in the last 12 months — any shared equipment is historical, not active.

Show all-time history (1 truck · 1 carriers)

Across all inspections on record: USDOT 2813392

Shares a registration email domain with other carriers

@szt-ml.com — 3 carriers: USDOT 2936159 USDOT 4206658

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Shared w/ other carriers

Registered and roadside-observed capacity are broadly consistent.

Explore the carrier network & VIN cross-links

Identity & contact

FMCSA census + L&I dossier

Location

Physical address: 599 S MAIN ST, BRIGHTON, CO, 80601-3044
Operation: Intrastate (Non-Hazmat)

Contact

Phone: (720) 980-1466
Email: michelle.salas@szt-ml.com
Web domain: szt-ml.com

Registration

Officer: Michelle Salas
USDOT / docket: 4270233
First registered: Jul 19, 2024
Last MCS-150: Mar 3, 2025 · 95,000 mi (2024)
FMCSA safety rating: Not rated
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

95,000

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

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.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

No verified reviews yet

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Verification summaryAuthority, insurance, safety and identity facts for MAINLINE UNDERGROUND CORPORATION.

MAINLINE UNDERGROUND CORPORATION (USDOT 4270233) is unrated by Vektor because the carrier's FMCSA record does not contain enough evidence for a safety score as of Jul 18, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Jul 18, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Jul 18, 2026.

Its vehicle out-of-service rate was 50.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jul 18, 2026.

The carrier received 4 roadside inspections in the last 24 months — 4 vehicle-level and 4 driver-level — across 1 state, according to FMCSA roadside-inspection data refreshed Jul 18, 2026.

The carrier has 0 reportable crashes in the last 24 months and 0 fatal crashes across the full FMCSA crash record available as of Jul 18, 2026.

It reports 5 power units and 5 drivers in its most recent MCS-150 filing dated Mar 3, 2025.

It has no FMCSA-assigned safety rating in the federal record refreshed Jul 18, 2026.

Frequently asked

What is MAINLINE UNDERGROUND CORPORATION's USDOT number?

MAINLINE UNDERGROUND CORPORATION's USDOT number is 4270233.

Is MAINLINE UNDERGROUND CORPORATION authorized to operate?

As of 2026-07-18, MAINLINE UNDERGROUND CORPORATION is active in the FMCSA register.

What is MAINLINE UNDERGROUND CORPORATION's safety record?

MAINLINE UNDERGROUND CORPORATION has a 50.0% vehicle out-of-service rate (national average 22.26%) across 4 roadside inspections, with 0 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor does not assign this carrier a safety score: 4 federal roadside inspections in the last 24 months. FMCSA itself will not score a carrier's vehicle or driver record on fewer than 5, and neither will we — verify authority, insurance and references directly before tendering.