WEST 15TH STREET
Carrying WEST 15TH STREET over RATTLESNAKE BRANCH
1.0 MILE W OF LA 21, St. Tammany, Louisiana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: WEST 15TH STREET
The WEST 15TH STREET bridge in St. Tammany, Louisiana carries WEST 15TH STREET over RATTLESNAKE BRANCH. It was built in 2017, making it 9 years old today. The structure is built primarily of concrete and spans 4 sections, stretching 13.7 meters (45 feet) end to end. Daily traffic averages 122 vehicles, placing it in the lower-traffic tier of Louisiana bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show culvert at 8/9. The weakest component sits in good condition. All reported major components score above the Poor range. Its NBI inventory load rating is 32.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How WEST 15TH STREET compares
Live comparison across Louisiana.
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 How the historical reference is calculated.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
- 2017
- Material
- Concrete
- Number of Spans
- 4
- Structure Length
- 13.7 m (45 ft)
- Deck Width
- 19.2 m (63 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 122 vehicles/day
- Structure Number
- 625200000620336
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 WEST 15TH STREET 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 WEST 15TH STREET 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 WEST 15TH STREET?
WEST 15TH STREET in St. Tammany, Louisiana on the FHWA's 0–9 scale.
How often is WEST 15TH STREET inspected?
WEST 15TH STREET'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 122 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. WEST 15TH STREET 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 WEST 15TH STREET?
WEST 15TH STREET has an NBI inventory load rating of 32.4 metric tons.
Who is responsible for maintaining WEST 15TH STREET?
WEST 15TH STREET is owned and maintained by City/Municipal Highway Agency.
How old is WEST 15TH STREET and does age affect safety?
WEST 15TH STREET was built in 2017, making it 9 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.