450 SO.ST. TOWN RD
Carrying 450 SO.ST. TOWN RD over CORINNE CANAL
350 E. 450 S. FIELDING, Box Elder, Utah
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
450 SO.ST. TOWN RD in Box Elder, Utah sits above 37% of rated Utah bridges on inventory load rating (30 t), while its 1940 build year is earlier than 92% of Box Elder's recorded-year cohort (184 bridges).
450 SO.ST. TOWN RD in Box Elder, Utah is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1940, 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 UT:003028C
PRE-1950 · STEEL · MULTI-SPAN · SUB-LED · TRACE-ADT · STANDARD-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- STEEL Steel
- MULTI-SPAN 2 spans
- SUB-LED Substructure-led
- TRACE-ADT Trace ADT
- STANDARD-LOAD Standard 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: 450 SO.ST. TOWN RD
The 450 SO.ST. TOWN RD bridge in Box Elder, Utah carries 450 SO.ST. TOWN RD over CORINNE CANAL. It was built in 1940, making it 86 years old today. It was last reconstructed in 1990, extending its service life. The structure is built primarily of steel and spans 2 sections, stretching 7.8 meters (26 feet) end to end. Daily traffic averages 13 vehicles, placing it in the lower-traffic tier of Utah bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 5/9, substructure at 4/9. 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.
How 450 SO.ST. TOWN RD compares
Age against the county: built in 1940, earlier than 170 of Box Elder's 184 bridges with a recorded construction year (92%), against a county median build year of 1976. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Utah bridges with a recorded inventory load rating (3,113 of 3,125 rated).
450 SO.ST. TOWN RD vs every rated Utah bridge
Inventory load rating (metric tons), FHWA NBI, this state
30 Top 63% higher than 37% of 3,113 bridges
rated Utah 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.
Box Elder inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 184 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
- 1940
- Last Reconstructed
- 1990
- Material
- Steel
- Number of Spans
- 2
- Structure Length
- 7.8 m (26 ft)
- Deck Width
- 4.9 m (16 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 13 vehicles/day
- Structure Number
- 003028C
Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear on file for this vintage.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
450 SO.ST. TOWN 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 450 SO.ST. TOWN RD against other structures in Box Elder and across Utah. Utah 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 450 SO.ST. TOWN RD?
450 SO.ST. TOWN RD in Box Elder, Utah has a deck rating of 6/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is 450 SO.ST. TOWN RD inspected?
450 SO.ST. TOWN 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 13 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 450 SO.ST. TOWN 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 450 SO.ST. TOWN RD?
450 SO.ST. TOWN RD has an NBI inventory load rating of 30.1 metric tons.
Who is responsible for maintaining 450 SO.ST. TOWN RD?
450 SO.ST. TOWN RD is owned and maintained by County Highway Agency.
How old is 450 SO.ST. TOWN RD and does age affect safety?
450 SO.ST. TOWN RD was built in 1940, making it 86 years old and last reconstructed in 1990.
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.
Share this inspection record
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.