IH USH 51-IH 39 NB
Carrying IH USH 51-IH 39 NB over LITTLE EAU CLAIRE RIVER
0.7M N JCT CTH DB TO E, Portage, Wisconsin
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: IH USH 51-IH 39 NB
The IH USH 51-IH 39 NB bridge in Portage, Wisconsin carries IH USH 51-IH 39 NB over LITTLE EAU CLAIRE RIVER. It was built in 1972, making it 54 years old today. It was last reconstructed in 2007, extending its service life. The structure is built primarily of prestressed concrete continuous and spans 2 sections, stretching 45.9 meters (151 feet) end to end. Daily traffic averages 11,400 vehicles, placing it in the heavily-trafficked tier of Wisconsin bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 6/9, substructure at 7/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 27.5 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How IH USH 51-IH 39 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 How the historical reference is calculated.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
- 1972
- Last Reconstructed
- 2007
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 2
- Structure Length
- 45.9 m (151 ft)
- Deck Width
- 13.2 m (43 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 11,400 vehicles/day
- Structure Number
- B49005900000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
This page shows what the last federal inspection recorded, not whether IH USH 51-IH 39 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 USH 51-IH 39 NB against other structures in Portage 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 USH 51-IH 39 NB?
IH USH 51-IH 39 NB in Portage, Wisconsin has a deck rating of 7/9, superstructure rating of 6/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is IH USH 51-IH 39 NB inspected?
IH USH 51-IH 39 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 11,400 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IH USH 51-IH 39 NB is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for IH USH 51-IH 39 NB?
IH USH 51-IH 39 NB has an NBI inventory load rating of 27.5 metric tons.
Who is responsible for maintaining IH USH 51-IH 39 NB?
IH USH 51-IH 39 NB is owned and maintained by State Highway Agency.
How old is IH USH 51-IH 39 NB and does age affect safety?
IH USH 51-IH 39 NB was built in 1972, making it 54 years old and last reconstructed in 2007.
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.