LRD TROUT BROOK RD
Carrying LRD TROUT BROOK RD over WILLOW RIVER
1.3M N JCT CTH A, St. Croix, Wisconsin
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
LRD TROUT BROOK RD in St. Croix, Wisconsin sits above 1% of rated Wisconsin bridges on inventory load rating (13 t), while its 1975 build year is earlier than 70% of St. Croix's recorded-year cohort (298 bridges).
LRD TROUT BROOK RD in St. Croix, Wisconsin is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1975, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure WI:P55014600000000
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · DECK-LED · LOCAL-ADT · LIGHT-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- DECK-LED Deck-led
- LOCAL-ADT Local ADT
- LIGHT-LOAD Light load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: LRD TROUT BROOK RD
The LRD TROUT BROOK RD bridge in St. Croix, Wisconsin carries LRD TROUT BROOK RD over WILLOW RIVER. It was built in 1975, making it 51 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 33.1 meters (109 feet) end to end. Daily traffic averages 920 vehicles, placing it in the lower-traffic tier of Wisconsin bridges. It is owned and maintained by Town/Township Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 6/9, substructure at 5/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How LRD TROUT BROOK RD compares
Age against the county: built in 1975, earlier than 208 of St. Croix's 298 bridges with a recorded construction year (70%), against a county median build year of 1990. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Wisconsin bridges with a recorded inventory load rating (14,446 rated).
LRD TROUT BROOK RD vs every rated Wisconsin bridge
Inventory load rating (metric tons), FHWA NBI, this state
13 Top 99% higher than 1% of 14,446 bridges
rated Wisconsin bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
St. Croix inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 298 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1975
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 33.1 m (109 ft)
- Deck Width
- 9.6 m (31 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 920 vehicles/day
- Structure Number
- P55014600000000
Condition Analysis
- • The deck (driving surface) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 5/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
LRD TROUT BROOK RD 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 LRD TROUT BROOK RD against other structures in St. Croix 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 LRD TROUT BROOK RD?
LRD TROUT BROOK RD in St. Croix, Wisconsin has a deck rating of 4/9, superstructure rating of 6/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is LRD TROUT BROOK RD inspected?
LRD TROUT BROOK RD'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 920 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. LRD TROUT BROOK RD 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 LRD TROUT BROOK RD?
LRD TROUT BROOK RD has an NBI inventory load rating of 13.0 metric tons.
Who is responsible for maintaining LRD TROUT BROOK RD?
LRD TROUT BROOK RD is owned and maintained by Town/Township Highway Agency.
How old is LRD TROUT BROOK RD and does age affect safety?
LRD TROUT BROOK RD was built in 1975, making it 51 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.
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Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.