Carrier profile · USDOT 1511513 · Updated Jun 13, 2026

STEWART BUILDERS INC

DBA KEYSTONE CONCRETE

30 power unitsavg 7 yrLocal · 1 statesHOUSTON, TX74/100

AUTHORITY STATUS UNKNOWN

Observed fleet · trailing 24 mo daily

30Power units

7 observed · MCS-150

3Trailers seen

Decoded · vPIC

7.0Avg age (yr)

2004–2024 · vPIC

Call dispatch(713) 983-8002 Email dispatchKCPDOT@KEYSTONECONCRETE.COM

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Load decision · FMCSA snapshot · Jun 13, 2026

Review before loading

Operating, but with flags a broker should weigh before tendering freight.

Established 20 yearsVehicle out-of-service rate well above average

Watch · 2

Vehicle out-of-service rate well above average44.4% of vehicle inspections were placed out of service vs the 22.26% national average.Fatal crash on record1 crash(es) involving a fatality are on this carrier's record.

In good standing · 1

Established 20 yearsOperating authority has been on file since 2006.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo44.4%

▲ 22.26% nat'l

Crashes · fatal

3 in 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo44.4%

▲ 22.26% nat'l

Crashes · fatal

3 in 24 mo

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

Fleet typeIdentity

Asset-based

30 power units. Brokers price each fleet type apart.

Fleet age vs peersTypical

7 yr

Model years 2004–2024 · peer benchmark unavailable.

Identity stabilityStable

20 yr unchanged

Same registration since 2006 — no chameleon / reincarnation signal.

Safety

11 inspections · 24 mo · vs national benchmarks

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

Vehicle OOS 44.4%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 — 9 vehicle and 10 driver inspections over 24 months.

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

16.7% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 45.8 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

11 inspections in the charted months · busiest month Oct '24 · 1

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar 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.

Thin coverage

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.2 / unit·yr

thin signalabundant signal

Few roadside inspections for a 30-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.

Registered power units: 30
Inspections · 24 mo: 11
Annualized: ≈6 / yr
Coverage: ≈0.2 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.

393.75 Tires (defective / underinflated / worn)Vehicle Maintenance7 · 3 OOS
392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving4 · 0 OOS
393.130 Cargo securement — heavy vehicles/equipmentVehicle Maintenance4 · 2 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance2 · 0 OOS
393.50 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 0 OOS
396.5 Oil and/or grease leakVehicle Maintenance1 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance1 · 0 OOS
396.17 Periodic (annual) inspectionVehicle Maintenance1 · 0 OOS
393.110 Cargo securement — number of tiedownsVehicle Maintenance1 · 1 OOS
393.78 Windshield wipersVehicle 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): 30
Observed power (24 mo): 7
Trailers (towed): 3

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

Fleet age· model years · decoded VINs

7.0 yr

Average age

2024

Newest model yr

2004

Oldest model yr

30.0%

VINs decoded

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

TX busiest

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

Home base

HOUSTON, TX

23000 NW LAKE DRIVE

Top corridor

TX 11

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

Shares a registration email domain with other carriers

@keystoneconcrete.com — 2 carriers: USDOT 2046351

Shares a company officer with other carriers

mark stewart — 17 carriers: USDOT 134519 USDOT 844172 USDOT 1029796 USDOT 1483548 USDOT 1936734 USDOT 1943543 USDOT 2004099 USDOT 2029426

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.

Explore the carrier network & VIN cross-links

Identity & contact

FMCSA census + L&I dossier

Location

Physical address: 23000 NW LAKE DRIVE, HOUSTON, TX, 77095-5344
Operation: Intrastate (Non-Hazmat)

Contact

Phone: (713) 983-8002
Cell: (281) 932-5549
Fax: (713) 983-8845
Email: kcpdot@keystoneconcrete.com
Web domain: keystoneconcrete.com

Registration

Officers: Mark Stewart · Bradley Stewart
USDOT / docket: 1511513
First registered: Jun 7, 2006
Last MCS-150: Mar 28, 2025 · 241,334 mi (2024)
FMCSA safety rating: Not rated
Recordable crash rate: 0.00
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

241,334

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

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Verification summaryAuthority, insurance, safety and identity facts for STEWART BUILDERS INC.

STEWART BUILDERS INC (USDOT 1511513) has a Vektor safety score of 74/100 and a Review before loading verdict, from the carrier's FMCSA record refreshed Jun 13, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Jun 13, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Jun 13, 2026.

Its vehicle out-of-service rate was 44.4% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier received 11 roadside inspections in the last 24 months — 9 vehicle-level and 10 driver-level — across 1 state, according to FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier has 3 reportable crashes in the last 24 months and 1 fatal crash across the full FMCSA crash record available as of Jun 13, 2026.

It reports 30 power units and 29 drivers in its most recent MCS-150 filing dated Mar 28, 2025.

It has no FMCSA-assigned safety rating in the federal record refreshed Jun 13, 2026.

Frequently asked

What is STEWART BUILDERS INC's USDOT number?

STEWART BUILDERS INC's USDOT number is 1511513.

Is STEWART BUILDERS INC authorized to operate?

As of Jun 13, 2026, STEWART BUILDERS INC is active in the FMCSA register.

What is STEWART BUILDERS INC's safety record?

STEWART BUILDERS INC has a 44.4% vehicle out-of-service rate (national average 22.26%) across 13 roadside inspections, with 3 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor's computed risk score is 74/100 (tier: review).