OAK HARBOR BLVD
Carrying OAK HARBOR BLVD over I-10
1.0M N LAKE PONTCHARTRAIN, St. Tammany, Louisiana
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
OAK HARBOR BLVD in St. Tammany, Louisiana sits above 42% of rated Louisiana bridges on inventory load rating (32 t), while its 1989 build year is earlier than 26% of St. Tammany's recorded-year cohort (360 bridges).
OAK HARBOR BLVD in St. Tammany, Louisiana is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1989, 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:625204501801001
LATE-CENTURY · PRESTRESS · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-GOOD
- LATE-CENTURY 1980–1999
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 13 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: OAK HARBOR BLVD
The OAK HARBOR BLVD bridge in St. Tammany, Louisiana carries OAK HARBOR BLVD over I-10. It was built in 1989, making it 37 years old today. The structure is built primarily of prestressed concrete and spans 13 sections, stretching 345.9 meters (1135 feet) end to end. Daily traffic averages 8,602 vehicles, placing it in the moderately-trafficked tier of Louisiana bridges. It is owned and maintained by State 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. No reported major component scores in the Poor range under the current federal condition thresholds.
How OAK HARBOR BLVD compares
Age against the county: built in 1989, earlier than 93 of St. Tammany's 360 bridges with a recorded construction year (26%), against a county median build year of 1974. 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).
OAK HARBOR BLVD vs every rated Louisiana bridge
Inventory load rating (metric tons), FHWA NBI, this state
32 Top 58% higher than 42% 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.
St. Tammany inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 360 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
- 1989
- Material
- Prestressed Concrete
- Number of Spans
- 13
- Structure Length
- 345.9 m (1135 ft)
- Deck Width
- 27.0 m (89 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 8,602 vehicles/day
- Structure Number
- 625204501801001
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 OAK HARBOR 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 OAK HARBOR BLVD against other structures in St. Tammany 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 OAK HARBOR BLVD?
OAK HARBOR BLVD in St. Tammany, 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 OAK HARBOR BLVD inspected?
OAK HARBOR 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 8,602 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. OAK HARBOR 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 OAK HARBOR BLVD?
OAK HARBOR BLVD has an NBI inventory load rating of 31.8 metric tons.
Who is responsible for maintaining OAK HARBOR BLVD?
OAK HARBOR BLVD is owned and maintained by State Highway Agency.
How old is OAK HARBOR BLVD and does age affect safety?
OAK HARBOR BLVD was built in 1989, making it 37 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.