IH USH51-IH39 NB
Carrying IH USH51-IH39 NB over CTH O
4.7M E JCT STH 23 TO W, Marquette, Wisconsin
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: IH USH51-IH39 NB
The IH USH51-IH39 NB bridge in Marquette, Wisconsin carries IH USH51-IH39 NB over CTH O. It was built in 1983, making it 43 years old today. The structure is built primarily of concrete continuous. Daily traffic averages 980 vehicles, placing it in the lower-traffic tier of Wisconsin bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. No reported major component scores in the Poor range under the current federal condition thresholds.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How IH USH51-IH39 NB compares
Live comparison across Wisconsin.
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 How the historical reference is calculated.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
- 1983
- Material
- Concrete Continuous
- Avg Daily Traffic
- 980 vehicles/day
- Structure Number
- B39001700000000
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 IH USH51-IH39 NB 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 IH USH51-IH39 NB against other structures in Marquette and across Wisconsin. Wisconsin 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 IH USH51-IH39 NB?
IH USH51-IH39 NB in Marquette, Wisconsin on the FHWA's 0–9 scale.
How often is IH USH51-IH39 NB inspected?
IH USH51-IH39 NB'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 980 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IH USH51-IH39 NB 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 IH USH51-IH39 NB?
An inventory load rating is not recorded for IH USH51-IH39 NB.
Who is responsible for maintaining IH USH51-IH39 NB?
Ownership is not specified for IH USH51-IH39 NB in the NBI.
How old is IH USH51-IH39 NB and does age affect safety?
IH USH51-IH39 NB was built in 1983, making it 43 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.