12400 South
Carrying 12400 South over I-15 (SR-15) NBL & S
2.1 MI NO OF SANTAQUIN, Utah, Utah
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 12400 South
The 12400 South bridge in Utah, Utah carries 12400 South over I-15 (SR-15) NBL & S. It was built in 1967, making it 59 years old today. The structure is built primarily of concrete continuous. Daily traffic averages 33,710 vehicles, placing it in the heavily-trafficked tier of Utah bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. All reported major components score above the Poor range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 12400 South compares
Live comparison across Utah.
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 How the historical reference is calculated.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
- Concrete Continuous
- Avg Daily Traffic
- 33,710 vehicles/day
- Structure Number
- 0D 749
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 12400 South 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 12400 South against other structures in Utah 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 12400 South?
12400 South in Utah, Utah on the FHWA's 0–9 scale.
How often is 12400 South inspected?
12400 South'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 33,710 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 12400 South 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 12400 South?
An inventory load rating is not recorded for 12400 South.
Who is responsible for maintaining 12400 South?
Ownership is not specified for 12400 South in the NBI.
How old is 12400 South and does age affect safety?
12400 South 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.