9 of your 50 roadside inspections in the last 24 months ended with an out-of-service order, most recently Texas on October 1.
Your latest, Colorado on October 8, had 3 violations, none out of service.
Your MCS-150 lists 56 trucks and 55 drivers.
Every violation on this list stays on your FMCSA record for 24 months and counts toward the scores FMCSA uses to choose carriers for an investigation. The investigator asks for the files behind each one.
G4 TANK LINES LLC is a mid-size fleet motor carrier based in DENVER, Colorado (USDOT #4013855). As of October 24, 2026, it holds a Not Rated FMCSA safety rating and a FileFlo Carrier Intelligence Score of 59/100 (Elevated Risk), based on 50 recent inspection(s) and 81 recorded violation(s) in public FMCSA data.
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Turn on free alerts59/100 Elevated Risk
| Category | Score | Max |
|---|---|---|
| Safety Rating | 22 | 30 |
| Inspection Pass Rate | 15 | 20 |
| Out-of-Service Rate (vs FMCSA national avg) | 13 | 15 |
| CSA BASIC percentiles | Not measured | n/a |
Three public FMCSA components, scored by FileFlo. CSA BASIC percentiles are not in FMCSA's public data, so they are shown as not measured.
FMCSA's licensing record shows MC1512057, motor property common carrier authority, granted on June 14, 2023.
G4 TANK LINES LLC is a mid-size fleet operating out of DENVER, Colorado with USDOT number 4013855. The company operates 56 power units and has no published FMCSA safety rating (most active carriers are unrated unless they have undergone a compliance review). Based on our analysis of federal safety data, G4 TANK LINES LLC has a FileFlo Carrier Intelligence Score (CIS) of 59/100, classified as Elevated Risk.
G4 TANK LINES LLC has undergone 50 recorded DOT inspections. The vehicle out-of-service rate is 18.0%, which is below the national average of 20.72%, suggesting solid vehicle maintenance practices.
The public FMCSA record for G4 TANK LINES LLC carries 81 recorded violations, and the most recent inspection on file is dated October 8, 2026. Across 50 recorded inspections, the record carries 0 driver out-of-service violations and 15 vehicle out-of-service violations.
A recorded violation is what an inspector wrote down at the roadside. It is not a penalty, and it is not an amount owed: FMCSA assesses civil penalties only after a compliance review classifies specific cited violations. The step that changes this record is the document behind each line, so the next move is to see which records an investigator would ask for and which of them exist today.
The Carrier Intelligence Score is FileFlo's own summary of three public FMCSA components for G4 TANK LINES LLC: the safety rating, the inspection pass rate and the out-of-service rate against the national average. It is not an FMCSA score, and FMCSA does not use it to choose carriers for an investigation. 59 out of 100 falls in FileFlo's Elevated Risk band.
G4 TANK LINES LLC is classified by FMCSA as an interstate carrier.
The carrier holds an Authorized For Hire classification, meaning it transports cargo or passengers for compensation under FMCSA operating authority and is subject to MC-number requirements at 49 CFR Part 365.
G4 TANK LINES LLC is flagged in FMCSA Census as a hazardous materials carrier (HM indicator: Y). Hazmat carriers are subject to additional regulations under 49 CFR Subchapter C, including HM-126 reporting, HM-232 security planning, and the Hazmat Cargo Tank Annual Inspection requirement (49 CFR 180.407). Hazmat violations carry their own, higher penalty schedule, separate from the general FMCSA schedule.
Operational range per MCS-150 filing: interstate within 100 miles (short-haul, 55 drivers). The 100-mile boundary matters because drivers operating within a 100-air-mile radius qualify for the short-haul exception under 49 CFR 395.1(e)(1), which removes the requirement to maintain RODS for the day.
Self-reported MCS-150 annual mileage: 1,871,200 miles. MCS-150 mileage feeds the FMCSA SafeStat exposure denominator: drastically understated mileage can artificially inflate CSA BASIC percentile scores by reducing the per-mile exposure baseline. Updates are required every 24 months under 49 CFR 390.19.
Owned equipment per the FMCSA Census filing: 56 tractors, 67 trailers. Owned-vs-leased equipment matters for compliance documentation, owned trailers require the carrier to retain annual inspection certificates under 49 CFR 396.17, while leased trailers shift that documentation responsibility to the lease agreement.
The carrier reports 55 CDL-holding drivers on file. Each CDL driver must have a current Driver Qualification File (DQF) maintained per 49 CFR 391.51, including a Medical Examiner's Certificate, an annual MVR review, and a record of road-test results.
The FMCSA Motor Carrier Management Information System (MCMIS) crash dataset records 1 crash event involving G4 TANK LINES LLC in the available reporting window. Of these, 0 involved a fatality, 1 involved a reported injury, and 1 resulted in a tow-away. 1 event meets the federal-recordable threshold under 49 CFR 390.5 (fatality, injury treated away from the scene, OR tow-away of any vehicle).
Most recent recorded event: I-80 MP 204.42, RAWLINS, WY on August 28, 2026.
Inspections cluster geographically across Texas (22), Colorado (10), Montana (6). The concentration in Texas is consistent with the carrier's primary lanes and tends to correlate with which state DOT inspector teams G4 TANK LINES LLC's drivers encounter most often at roadside checkpoints.
Across the 50 recorded inspections, G4 TANK LINES LLC's 18.0% vehicle out-of-service rate sits slightly below the FMCSA 2024 national average of 20.72%. The 0.0% driver out-of-service rate sits materially below the 2024 national average of 5.51%.
Your last out-of-service was 23 days ago.
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| Date | State | Driver OOS | Vehicle OOS | Next step |
|---|---|---|---|---|
| 2026-10-08 | CO | 0 | 0 | Audit check |
| 2026-10-05 | UT | 0 | 0 | Audit check |
| 2026-10-01 | TX | 0 | 1 | Audit check |
| 2026-09-18 | CO | 0 | 0 | Audit check |
| 2026-09-01 | LA | 0 | 0 | Audit check |
| 2026-08-31 | CO | 0 | 0 | Audit check |
| 2026-08-17 | TX | 0 | 0 | Audit check |
| 2026-08-12 | OK | 0 | 0 | Audit check |
| 2026-08-09 | TX | 0 | 0 | Audit check |
| 2026-07-31 | CO | 0 | 0 | Audit check |
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G4 TANK LINES LLC (USDOT #4013855) does not currently carry a published FMCSA safety rating. A "Not Rated" status is common for carriers that have never had a compliance review: it is not a negative finding. FileFlo scores the carrier at 59/100 (Elevated Risk) from the public inspection and out-of-service data that is available.
Per its most recent FMCSA MCS-150 filing, G4 TANK LINES LLC operates 56 power unit(s) and 55 driver(s), classifying it as a mid-size fleet. Fleet counts are self-reported to FMCSA and can lag a carrier's current operation.
G4 TANK LINES LLC is registered with the FMCSA at a physical address in DENVER, Colorado, under USDOT number 4013855.
FileFlo shows 50 recent DOT inspection(s) and 81 recorded violation(s) for G4 TANK LINES LLC (USDOT #4013855), sourced from FMCSA public records and the Socrata transportation datasets. The inspection table on this page lists dates, states, and out-of-service counts.
G4 TANK LINES LLC scores 59/100 (Elevated Risk) on FileFlo's Carrier Intelligence Score. The score normalizes three public FMCSA components (safety rating, inspection pass rate, and out-of-service rate versus the national average) into one 0-100 surface. CSA SMS BASIC percentiles are not published in FMCSA's public data and are excluded rather than estimated.
The 49 CFR sections a DOT compliance review actually checks, plain-English:
Compliance terms: CSA score · out-of-service order · hours of service · driver qualification file. See DOT compliance software & document management →
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Data sourced from FMCSA public records and the Socrata transportation dataset. Last updated: October 24, 2026. Information may not reflect the carrier's current status. Dispute this record · Claim this profile