100 SOUTH
Carrying 100 SOUTH over BLACKSMITH FORK RIVER
290 W. 100 S., MILLVILLE, Cache, Utah
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 100 SOUTH
The 100 SOUTH bridge in Cache, Utah carries 100 SOUTH over BLACKSMITH FORK RIVER. It was built in 1930, making it 96 years old today. It was last reconstructed in 1950, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 11.6 meters (38 feet) end to end. Daily traffic averages 378 vehicles, placing it in the lower-traffic tier of Utah bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 5/9, substructure at 5/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 22.0 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 100 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 How the historical reference is calculated.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
- 1930
- Last Reconstructed
- 1950
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 11.6 m (38 ft)
- Deck Width
- 8.2 m (27 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 378 vehicles/day
- Structure Number
- 005010D
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether 100 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 100 SOUTH against other structures in Cache 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 100 SOUTH?
100 SOUTH in Cache, Utah has a deck rating of 6/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is 100 SOUTH inspected?
100 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 378 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 100 SOUTH is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for 100 SOUTH?
100 SOUTH has an NBI inventory load rating of 22.0 metric tons.
Who is responsible for maintaining 100 SOUTH?
100 SOUTH is owned and maintained by City/Municipal Highway Agency.
How old is 100 SOUTH and does age affect safety?
100 SOUTH was built in 1930, making it 96 years old and last reconstructed in 1950.
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.