Portzen Construction Inc is an active interstate carrier based in Dubuque, IA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 72 | 0 | 0 |
| Tractors | 3 | 0 | 0 |
| Trailers | 38 | 0 | 0 |
| Total Power Units | 75 | ||
Distinct vehicles · 24 mo
vs 75 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 44% | 83% | Around peer average |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 83% | 96% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 72% | 89% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 1 | — | 6.67% |
| Vehicle | 0 | 4 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 18 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Aug 20, 2026 | IA | STRAIGHT TRUCK | 2 | 0 |
| Jan 15, 2026 | WI | STRAIGHT TRUCK | 1 | 1 |
| Jan 2, 2026 | WI | STRAIGHT TRUCK | 4 | 2 |
| Aug 13, 2025 | WI | TRUCK TRACTOR | 2 |
Rowley Interstate Transportation Company Inc
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Tri-State Transportation Corporation
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Dubuque Community Schools
No alertsDubuque, IA · 84 units
Tschiggfrie Excavating Company
No alertsDubuque, IA · 87 units
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 4 | 0.23 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 8 | 6.35 | — |
| Driver Fitness | 2 | 0.26 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 2 states. Top state WI accounts for 76% of activity. Activity outside home state (IA): 76%.
| 4 |
| Unsafe Driving | 9 | 5 | 0 |
| Driver Fitness | 4 | 1 | 2 |
| 0 |
| Aug 6, 2025 | WI | STRAIGHT TRUCK | 1 | 0 |
| Jun 16, 2025 | WI | STRAIGHT TRUCK | 3 | 0 |
| Jun 13, 2025 | WI | STRAIGHT TRUCK | 2 | 1 |
| May 14, 2025 | WI | STRAIGHT TRUCK | 0 | 0 |
| Nov 20, 2024 | WI | STRAIGHT TRUCK | 3 | 1 |
| Nov 18, 2024 | WI | TRUCK TRACTOR | 2 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Aug 20, 2026 | 39381H | Horn - Inoperative or defective | Vehicle Maintenance | — |
| Aug 20, 2026 | 39617CPI | Operating a CMV without documentation of a periodic inspection | Vehicle Maintenance | — |
| Jan 15, 2026 | 39343DB | Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly | Vehicle Maintenance | Yes |
| Jan 2, 2026 | 39343DB | Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly | Vehicle Maintenance | Yes |
| Jan 2, 2026 | 39370DCDTSDNS | Coupling - Full Trailer safety devices not attached/not able to be secured | Vehicle Maintenance | Yes |
| Jan 2, 2026 | 3939ALIL | Lighting - Identification lamp(s) inoperative | Vehicle Maintenance | — |
| Jan 2, 2026 | 39617CPI | Operating a CMV without documentation of a periodic inspection | Vehicle Maintenance | — |
| Aug 13, 2025 | 39355EB | Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1 1998 | Vehicle Maintenance | — |
| Aug 13, 2025 | 3939ALIL | Lighting - Identification lamp(s) inoperative | Vehicle Maintenance | — |
| Aug 6, 2025 | 3939ALSML | Lighting - Side marker lamp(s) inoperative | Vehicle Maintenance | — |