US 31 SB
Carrying US 31 SB over BIG PIPE CREEK
00.11 N SR 218, Miami, Indiana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: US 31 SB
The US 31 SB bridge in Miami, Indiana carries US 31 SB over BIG PIPE CREEK. It was built in 1972, making it 54 years old today. It was last reconstructed in 2009, extending its service life. The structure is built primarily of steel continuous and spans 3 sections, stretching 70.3 meters (231 feet) end to end. Daily traffic averages 11,773 vehicles, placing it in the heavily-trafficked tier of Indiana bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range. Its NBI inventory load rating is 43.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How US 31 SB compares
Live comparison across Indiana.
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 How the historical reference is calculated.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
- 1972
- Last Reconstructed
- 2009
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 70.3 m (231 ft)
- Deck Width
- 13.3 m (44 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 11,773 vehicles/day
- Structure Number
- 009870
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in good condition (8/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
How to read this record
This page shows what the last federal inspection recorded, not whether US 31 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 US 31 SB against other structures in Miami and across Indiana. Indiana 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 US 31 SB?
US 31 SB in Miami, Indiana has a deck rating of 8/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is US 31 SB inspected?
US 31 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 11,773 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US 31 SB is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for US 31 SB?
US 31 SB has an NBI inventory load rating of 43.4 metric tons.
Who is responsible for maintaining US 31 SB?
US 31 SB is owned and maintained by State Highway Agency.
How old is US 31 SB and does age affect safety?
US 31 SB was built in 1972, making it 54 years old and last reconstructed in 2009.
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.