I85NBL,US15N
Carrying I85NBL,US15N over NEUSE RIVER/FALLS LAKE
4.0 MI.S.JCT.NC56, Durham, North Carolina
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: I85NBL,US15N
The I85NBL,US15N bridge in Durham, North Carolina carries I85NBL,US15N over NEUSE RIVER/FALLS LAKE. It was built in 1969, making it 57 years old today. The structure is built primarily of prestressed concrete and spans 10 sections, stretching 141.7 meters (465 feet) end to end. Daily traffic averages 25,750 vehicles, placing it in the heavily-trafficked tier of North Carolina bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 4/9, substructure at 5/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 41.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How I85NBL,US15N compares
Live comparison across North Carolina.
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 How the historical reference is calculated.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
- 1969
- Material
- Prestressed Concrete
- Number of Spans
- 10
- Structure Length
- 141.7 m (465 ft)
- Deck Width
- 12.8 m (42 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 25,750 vehicles/day
- Structure Number
- 000000000630226
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
- • The substructure (piers and abutments) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
How to read this record
I85NBL,US15N is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare I85NBL,US15N against other structures in Durham and across North Carolina. North Carolina 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 I85NBL,US15N?
I85NBL,US15N in Durham, North Carolina has a deck rating of 6/9, superstructure rating of 4/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is I85NBL,US15N inspected?
I85NBL,US15N'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 25,750 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I85NBL,US15N is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for I85NBL,US15N?
I85NBL,US15N has an NBI inventory load rating of 41.7 metric tons.
Who is responsible for maintaining I85NBL,US15N?
I85NBL,US15N is owned and maintained by State Highway Agency.
How old is I85NBL,US15N and does age affect safety?
I85NBL,US15N was built in 1969, making it 57 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.