CTH A
Carrying CTH A over UNION PACIFIC RR
1.0M W JCT STH 73, Columbia, Wisconsin
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: CTH A
The CTH A bridge in Columbia, Wisconsin carries CTH A over UNION PACIFIC RR. It was built in 1910, making it 116 years old today. The structure is built primarily of wood or timber and spans 8 sections, stretching 34.1 meters (112 feet) end to end. Daily traffic averages 197 vehicles, placing it in the lower-traffic tier of Wisconsin bridges. It is owned and maintained by Railroad.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 5/9, substructure at 2/9. The weakest component sits in critical condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 3.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How CTH A 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 How the historical reference is calculated.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
- 1910
- Material
- Wood or Timber
- Number of Spans
- 8
- Structure Length
- 34.1 m (112 ft)
- Deck Width
- 8.0 m (26 ft)
- Owner
- Railroad
- Avg Daily Traffic
- 197 vehicles/day
- Structure Number
- P11003300000000
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 fair condition (5/9), with minor deterioration that may require routine maintenance.
- • At 2/9, the substructure (piers and abutments) is in critical shape, with severe wear requiring urgent action.
How to read this record
CTH A 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 A against other structures in Columbia 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 A?
CTH A in Columbia, Wisconsin has a deck rating of 4/9, superstructure rating of 5/9, and substructure rating of 2/9 on the FHWA's 0–9 scale.
How often is CTH A inspected?
CTH A'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 197 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CTH A 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 A?
CTH A has an NBI inventory load rating of 3.2 metric tons.
Who is responsible for maintaining CTH A?
CTH A is owned and maintained by Railroad.
How old is CTH A and does age affect safety?
CTH A was built in 1910, making it 116 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.