18TH AVE SOUTH
Carrying 18TH AVE SOUTH over CLAM BAYOU
140FT W of 42ND STREET S, Pinellas, Florida
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 18TH AVE SOUTH
The 18TH AVE SOUTH bridge in Pinellas, Florida carries 18TH AVE SOUTH over CLAM BAYOU. It was built in 1990, making it 36 years old today. The structure is built primarily of concrete and spans 2 sections, stretching 6.6 meters (22 feet) end to end. Daily traffic averages 5,800 vehicles, placing it in the moderately-trafficked tier of Florida bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range. Its NBI inventory load rating is 55.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 18TH AVE SOUTH compares
Live comparison across Florida.
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 How the historical reference is calculated.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
- 1990
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 6.6 m (22 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 5,800 vehicles/day
- Structure Number
- 157133
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 18TH AVE 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 18TH AVE SOUTH against other structures in Pinellas and across Florida. Florida 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 18TH AVE SOUTH?
18TH AVE SOUTH in Pinellas, Florida on the FHWA's 0–9 scale.
How often is 18TH AVE SOUTH inspected?
18TH AVE 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 5,800 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 18TH AVE 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 18TH AVE SOUTH?
18TH AVE SOUTH has an NBI inventory load rating of 55.2 metric tons.
Who is responsible for maintaining 18TH AVE SOUTH?
18TH AVE SOUTH is owned and maintained by City/Municipal Highway Agency.
How old is 18TH AVE SOUTH and does age affect safety?
18TH AVE SOUTH was built in 1990, making it 36 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.