4TH ST
Carrying 4TH ST over US 34
2.1 mi. E of Jct. U.S. 61, Des Moines, Iowa
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 4TH ST
The 4TH ST bridge in Des Moines, Iowa carries 4TH ST over US 34. It was built in 1970, making it 56 years old today. The structure is built primarily of prestressed concrete. Daily traffic averages 17,400 vehicles, placing it in the heavily-trafficked tier of Iowa bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. All reported major components score above the Poor range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 4TH ST compares
Live comparison across Iowa.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1970
- Material
- Prestressed Concrete
- Avg Daily Traffic
- 17,400 vehicles/day
- Structure Number
- 000000000602945
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether 4TH ST is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare 4TH ST against other structures in Des Moines and across Iowa. Iowa bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for 4TH ST?
4TH ST in Des Moines, Iowa on the FHWA's 0–9 scale.
How often is 4TH ST inspected?
4TH ST's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 17,400 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 4TH ST is currently shown as unrated condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for 4TH ST?
An inventory load rating is not recorded for 4TH ST.
Who is responsible for maintaining 4TH ST?
Ownership is not specified for 4TH ST in the NBI.
How old is 4TH ST and does age affect safety?
4TH ST was built in 1970, making it 56 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.