Portzen Construction Inc
USDOT 459139 · MC-307464 · Dubuque, Iowa · Interstate for-hire carrier · 50–99 power units
Portzen Construction Inc is a corporation based in Dubuque, Iowa, registered with the FMCSA as an interstate carrier (private property, authorized for hire). It reports 75 power units and 120 drivers, which ranks it #87 by fleet size among 165 active for-hire carriers with 50+ power units headquartered in Iowa. In the 24 months to Sep 24, 2026 its trucks were inspected 11 times – about 0.1 inspections per power unit. 30.0% of vehicle inspections and 9.1% of driver inspections ended with an out-of-service order, against 20.5% and 3.3% for carriers of the same size nationally. FMCSA records no reportable crashes for this carrier in the last 24 months. Its registered cargo types are general freight, building materials, machinery, large objects, passengers, construction.
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Registration and contact
| Legal name | Portzen Construction Inc |
|---|---|
| DBA name | — |
| USDOT number | 459139 |
| Operating authority (docket) | MC-307464 |
| Entity type | Private Property, Authorized for Hire |
| Operation | Interstate |
| Business type | Corporation |
| Physical address | 205 Stone Valley Drive, Dubuque, IA 52003 |
| Phone | (563) 557-7642 |
| First registered | Sep 24, 1991 |
| Last MCS-150 update | May 28, 2025 |
| Hazmat carrier | No |
Check live authority, insurance and out-of-service status: FMCSA SAFER snapshot for USDOT 459139.
Fleet and drivers
| Equipment | Owned | Term-leased | Trip-leased |
|---|---|---|---|
| Straight trucks | 72 | 0 | 0 |
| Truck tractors | 3 | 0 | 0 |
| Trailers | 38 | 0 | 0 |
- 1.60 drivers per power unit (national median for 50+ unit fleets: 0.99) – suggests team driving, slip-seating or multiple shifts.
- 12.7 trailers per tractor – a drop-and-hook style trailer pool.
- 1,760,000 miles reported for 2024 – about 23,467 miles per power unit vs a 38,151 median for 50–99-unit fleets.
- 100% of listed equipment is owned rather than leased.
- 30 CDL drivers; 40 drivers operate interstate beyond 100 miles, 0 within 100 miles.
Safety record
Roadside inspections Sep 25, 2024 – Sep 24, 2026; crashes Nov 1, 2024 – Oct 31, 2026. Benchmarks: 50–99-unit for-hire carriers nationally (5,500) and Iowa carriers with 50+ units (165).
| Measure | Portzen Construction Inc | Same size, US | IA average | |
|---|---|---|---|---|
| Small sample: fewer than 20 vehicle or driver inspections, so rates can swing a lot with one inspection. | ||||
| Vehicle out-of-service rate | 30.0% | 20.5% | 19.3% | 47% higher than average |
| Driver out-of-service rate | 9.1% | 3.3% | 1.3% | 173% higher than average |
| Crashes per 100 power units | 0.0 | 4.8 | 4.7 | none recorded |
| Inspections | 11 | 11 with a driver check, 10 with a vehicle check, 21 BASIC violations recorded | ||
| FMCSA safety rating | Not rated – most carriers have never had a compliance review; this is not a negative finding. | |||
Cargo carried
Less common in this directory: passengers (178 of 5,000 carriers).
Similar carriers in Iowa
Closest fleet size and cargo mix among Iowa carriers in this directory.
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| National Concrete Cutting Inc USDOT 1367983 | Council Bluffs | 75 | 63 | 14 | 14.3% | 0 |
| QC Properties LLC USDOT 2456619 | Bettendorf | 75 | 56 | 20 | 42.9% | 2 |
| Tschiggfrie Excavating Company USDOT 402330 | Dubuque | 87 | 41 | 20 | 37.5% | 0 |
| Aspro Inc USDOT 744093 | Waterloo | 79 | 120 | 10 | 100.0% | 0 |
| Norris Asphalt Paving Company LC USDOT 295636 | Ottumwa | 76 | 69 | 17 | 66.7% | 2 |
| Schrader Excavating and Grading Company USDOT 1718149 | Walford | 72 | 18 | 11 | 42.9% | 0 |
Other carriers near Dubuque
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Hirschbach Motor Lines LLC USDOT 65769 | Dubuque | 2,948 | 2,556 | 4,201 | 23.4% | 204 |
| Foodliner Inc USDOT 46257 | Dubuque | 1,226 | 1,153 | 847 | 10.8% | 80 |
| Quest Liner Inc USDOT 1609038 | Dubuque | 344 | 239 | 524 | 11.1% | 24 |
| Art Pape Transfer Inc USDOT 1674 | Dubuque | 340 | 310 | 323 | 28.9% | 25 |
| Simon's Trucking Inc USDOT 164492 | Farley | 129 | 100 | 132 | 5.5% | 3 |
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FAQ
What is the USDOT number of Portzen Construction Inc?
Portzen Construction Inc is registered with USDOT number 459139 and operating authority MC-307464.
How many trucks does Portzen Construction Inc have?
It reports 75 power units (3 tractors, 72 straight trucks) and 38 trailers, with 120 drivers, on its last MCS-150 update (May 28, 2025).
Where is Portzen Construction Inc located?
Its registered physical address is in Dubuque, Iowa 52003.
What is the out-of-service rate of Portzen Construction Inc?
Over 24 months, 30.0% of vehicle inspections and 9.1% of driver inspections resulted in an out-of-service order (same-size national average: 20.5% vehicle, 3.3% driver).
Source: FMCSA Company Census File, SMS inspection file and Crash File (data.transportation.gov), refreshed 2026-11-04. Figures are as reported to FMCSA and may lag. How we calculate these numbers. Spotted an error? Carriers update their record with FMCSA via the MCS-150 form; see corrections.