CTH DB
Carrying CTH DB over LITTLE EAU CLAIRE RIVER
0.7M N JCT USH 51, Portage, Wisconsin
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: CTH DB
The CTH DB bridge in Portage, Wisconsin carries CTH DB over LITTLE EAU CLAIRE RIVER. It was built in 1942, making it 84 years old today. It was last reconstructed in 1998, extending its service life. The structure is built primarily of prestressed concrete continuous and spans 3 sections, stretching 51.1 meters (168 feet) end to end. Daily traffic averages 473 vehicles, placing it in the lower-traffic tier of Wisconsin bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 8/9, substructure at 6/9. 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 34.0 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How CTH DB 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 How the historical reference is calculated.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
- 1942
- Last Reconstructed
- 1998
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 51.1 m (168 ft)
- Deck Width
- 10.4 m (34 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 473 vehicles/day
- Structure Number
- B49074000000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) is in good condition (8/9), showing no significant deterioration.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether CTH DB 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 CTH DB 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 CTH DB?
CTH DB in Portage, Wisconsin has a deck rating of 7/9, superstructure rating of 8/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is CTH DB inspected?
CTH DB'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 473 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CTH DB 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 CTH DB?
CTH DB has an NBI inventory load rating of 34.0 metric tons.
Who is responsible for maintaining CTH DB?
CTH DB is owned and maintained by County Highway Agency.
How old is CTH DB and does age affect safety?
CTH DB was built in 1942, making it 84 years old and last reconstructed in 1998.
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.