STH 27 SB
Carrying STH 27 SB over IH 90
9.5M E JCT STH 162 TO N, Monroe, Wisconsin
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: STH 27 SB
The STH 27 SB bridge in Monroe, Wisconsin carries STH 27 SB over IH 90. It was built in 1968, making it 58 years old today. The structure is built primarily of steel continuous. Daily traffic averages 19,300 vehicles, placing it in the heavily-trafficked 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 STH 27 SB 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 How the historical reference is calculated.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
- 1968
- Material
- Steel Continuous
- Avg Daily Traffic
- 19,300 vehicles/day
- Structure Number
- B41012300000000
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 STH 27 SB 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 STH 27 SB against other structures in Monroe 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 STH 27 SB?
STH 27 SB in Monroe, Wisconsin on the FHWA's 0–9 scale.
How often is STH 27 SB inspected?
STH 27 SB'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 19,300 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. STH 27 SB 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 STH 27 SB?
An inventory load rating is not recorded for STH 27 SB.
Who is responsible for maintaining STH 27 SB?
Ownership is not specified for STH 27 SB in the NBI.
How old is STH 27 SB and does age affect safety?
STH 27 SB was built in 1968, making it 58 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.