CTH FF
Carrying CTH FF over TURTLE RIVER
5.5M S JCT USH 51, Iron, Wisconsin
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: CTH FF
The CTH FF bridge in Iron, Wisconsin carries CTH FF over TURTLE RIVER. It was built in 1967, making it 59 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 21.9 meters (72 feet) end to end. Daily traffic averages 780 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 4/9, superstructure at 8/9, substructure at 7/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order. Its NBI inventory load rating is 17.8 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How CTH FF 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 How the historical reference is calculated.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
- 1967
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 21.9 m (72 ft)
- Deck Width
- 10.0 m (33 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 780 vehicles/day
- Structure Number
- B26000300000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The superstructure (beams and supports above the deck) is in good condition (8/9), showing no significant deterioration.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
CTH FF is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare CTH FF against other structures in Iron 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 FF?
CTH FF in Iron, Wisconsin has a deck rating of 4/9, superstructure rating of 8/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is CTH FF inspected?
CTH FF'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 780 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CTH FF is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for CTH FF?
CTH FF has an NBI inventory load rating of 17.8 metric tons.
Who is responsible for maintaining CTH FF?
CTH FF is owned and maintained by County Highway Agency.
How old is CTH FF and does age affect safety?
CTH FF was built in 1967, making it 59 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.