I - 459 SOUTH
Carrying I - 459 SOUTH over CAHABA RIVER
I459 * CAHABA RIVER, Jefferson, Alabama
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I - 459 SOUTH in Jefferson, Alabama sits above 59% of rated Alabama bridges on inventory load rating (37 t), while its 1981 build year is earlier than 31% of Jefferson's recorded-year cohort (1,068 bridges).
I - 459 SOUTH in Jefferson, Alabama is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1981, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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 AL:012493
LATE-CENTURY · STEEL · LONG-SPAN-RUN · SUB-LED · HEAVY-ADT · STANDARD-LOAD · CAT-POOR
- LATE-CENTURY 1980–1999
- STEEL Steel
- LONG-SPAN-RUN 4 spans
- SUB-LED Substructure-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
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 - 459 SOUTH
The I - 459 SOUTH bridge in Jefferson, Alabama carries I - 459 SOUTH over CAHABA RIVER. It was built in 1981, making it 45 years old today. The structure is built primarily of steel continuous and spans 4 sections, stretching 193.9 meters (636 feet) end to end. Daily traffic averages 99,312 vehicles, placing it in the heavily-trafficked tier of Alabama bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 4/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How I - 459 SOUTH compares
Age against the county: built in 1981, earlier than 331 of Jefferson's 1,068 bridges with a recorded construction year (31%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across Alabama bridges with a recorded inventory load rating (16,191 of 16,205 rated).
I - 459 SOUTH vs every rated Alabama bridge
Inventory load rating (metric tons), FHWA NBI, this state
37 Top 41% higher than 59% of 16,191 bridges
rated Alabama 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.
Jefferson inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 1,068 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
- 1981
- Material
- Steel Continuous
- Number of Spans
- 4
- Structure Length
- 193.9 m (636 ft)
- Deck Width
- 17.9 m (59 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 99,312 vehicles/day
- Structure Number
- 012493
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) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear on file for this vintage.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
I - 459 SOUTH 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 I - 459 SOUTH against other structures in Jefferson and across Alabama. Alabama 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 - 459 SOUTH?
I - 459 SOUTH in Jefferson, Alabama has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is I - 459 SOUTH inspected?
I - 459 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 99,312 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I - 459 SOUTH 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 I - 459 SOUTH?
I - 459 SOUTH has an NBI inventory load rating of 37.1 metric tons.
Who is responsible for maintaining I - 459 SOUTH?
I - 459 SOUTH is owned and maintained by State Highway Agency.
How old is I - 459 SOUTH and does age affect safety?
I - 459 SOUTH was built in 1981, making it 45 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.