I-4WB TO I-275SB
Carrying I-4WB TO I-275SB over NEBRASKA AVENUE(SR-45)
AT I-4 & I-275 JUNCTION, Hillsborough, Florida
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I-4WB TO I-275SB in Hillsborough, Florida sits above 35% of rated Florida bridges on inventory load rating (34 t), while its 1963 build year is earlier than 88% of Hillsborough's recorded-year cohort (840 bridges).
I-4WB TO I-275SB in Hillsborough, Florida is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1963, 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 FL:100145
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · TIED-CTRL · HEAVY-ADT · STANDARD-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- HEAVY-ADT Heavy 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: I-4WB TO I-275SB
The I-4WB TO I-275SB bridge in Hillsborough, Florida carries I-4WB TO I-275SB over NEBRASKA AVENUE(SR-45). It was built in 1963, making it 63 years old today. It was last reconstructed in 2005, extending its service life. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 51.7 meters (170 feet) end to end. Daily traffic averages 57,000 vehicles, placing it in the heavily-trafficked tier of Florida 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. All reported major components score above the Poor range.
How I-4WB TO I-275SB compares
Age against the county: built in 1963, earlier than 743 of Hillsborough's 840 bridges with a recorded construction year (88%), against a county median build year of 1984. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Florida bridges with a recorded inventory load rating (13,032 of 13,036 rated).
I-4WB TO I-275SB vs every rated Florida bridge
Inventory load rating (metric tons), FHWA NBI, this state
34 Top 65% higher than 35% of 13,032 bridges
rated Florida 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.
Hillsborough inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 840 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
- 1963
- Last Reconstructed
- 2005
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 51.7 m (170 ft)
- Deck Width
- 24.3 m (80 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 57,000 vehicles/day
- Structure Number
- 100145
Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
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 I-4WB TO I-275SB 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 I-4WB TO I-275SB against other structures in Hillsborough 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 I-4WB TO I-275SB?
I-4WB TO I-275SB in Hillsborough, Florida 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 I-4WB TO I-275SB inspected?
I-4WB TO I-275SB'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 57,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I-4WB TO I-275SB 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 I-4WB TO I-275SB?
I-4WB TO I-275SB has an NBI inventory load rating of 33.5 metric tons.
Who is responsible for maintaining I-4WB TO I-275SB?
I-4WB TO I-275SB is owned and maintained by State Highway Agency.
How old is I-4WB TO I-275SB and does age affect safety?
I-4WB TO I-275SB was built in 1963, making it 63 years old and last reconstructed in 2005.
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.