South Irma Blvd
Carrying South Irma Blvd over BAYOU FRANCOIS
0.5 Mi N of LA 939, Ascension, Louisiana
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
South Irma Blvd in Ascension, Louisiana sits above 55% of rated Louisiana bridges on inventory load rating (33 t), while its 2003 build year is earlier than 10% of Ascension's recorded-year cohort (216 bridges).
South Irma Blvd in Ascension, Louisiana is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2003, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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 LA:610330139905471
POST-2000 · CONCRETE · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-GOOD
- POST-2000 2000+
- CONCRETE Concrete
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-GOOD Good
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: South Irma Blvd
The South Irma Blvd bridge in Ascension, Louisiana carries South Irma Blvd over BAYOU FRANCOIS. It was built in 2003, making it 23 years old today. The structure is built primarily of concrete and spans 4 sections, stretching 24.4 meters (80 feet) end to end. Daily traffic averages 1,200 vehicles, placing it in the moderately-trafficked tier of Louisiana bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How South Irma Blvd compares
Age against the county: built in 2003, earlier than 21 of Ascension's 216 bridges with a recorded construction year (10%), against a county median build year of 1977. This is one of the newer structures in its county.
Live comparison across Louisiana bridges with a recorded inventory load rating (12,682 of 12,698 rated).
South Irma Blvd vs every rated Louisiana bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 45% higher than 55% of 12,682 bridges
rated Louisiana 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.
Ascension inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 216 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
- 2003
- Material
- Concrete
- Number of Spans
- 4
- Structure Length
- 24.4 m (80 ft)
- Deck Width
- 8.0 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,200 vehicles/day
- Structure Number
- 610330139905471
Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • 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.
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 South Irma Blvd 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 South Irma Blvd against other structures in Ascension and across Louisiana. Louisiana 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 South Irma Blvd?
South Irma Blvd in Ascension, Louisiana has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is South Irma Blvd inspected?
South Irma Blvd'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 1,200 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. South Irma Blvd 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 South Irma Blvd?
South Irma Blvd has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining South Irma Blvd?
South Irma Blvd is owned and maintained by County Highway Agency.
How old is South Irma Blvd and does age affect safety?
South Irma Blvd was built in 2003, making it 23 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.
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.