46TH AVE DR
Carrying 46TH AVE DR over DRAINAGE DITCH
E OF 16 ST SOUTHPARK, Rock Island, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
46TH AVE DR in Rock Island, Illinois is rated Poor in the FHWA's 2024 National Bridge Inventory.
Built in 1973, 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 IL:081605500000000
INTERSTATE-ERA · STEEL · SINGLE-SPAN · DECK-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- SINGLE-SPAN Single span
- DECK-LED Deck-led
- ARTERIAL-ADT Arterial 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.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: 46TH AVE DR
The 46TH AVE DR bridge in Rock Island, Illinois carries 46TH AVE DR over DRAINAGE DITCH. It was built in 1973, making it 53 years old today. The structure is built primarily of steel and spans 1 section, stretching 18.6 meters (61 feet) end to end. Daily traffic averages 1,600 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by Private.
The latest FHWA inspection places the weakest component in poor condition (see the full component ratings below). A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How 46TH AVE DR compares
Age against the county: built in 1973, earlier than 190 of Rock Island's 272 bridges with a recorded construction year (70%), 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 Illinois bridges with a recorded inventory load rating (26,904 of 26,928 rated).
46TH AVE DR vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
37 Top 28% higher than 72% of 26,904 bridges
rated Illinois 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.
Rock Island inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 272 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
- 1973
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 18.6 m (61 ft)
- Deck Width
- 10.4 m (34 ft)
- Owner
- Private
- Avg Daily Traffic
- 1,600 vehicles/day
- Structure Number
- 081605500000000
Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear on file for this vintage.
- • The superstructure (beams and supports above the deck) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • At 5/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
46TH AVE DR 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 46TH AVE DR against other structures in Rock Island and across Illinois. Illinois 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 46TH AVE DR?
46TH AVE DR in Rock Island, Illinois has a deck rating of 4/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is 46TH AVE DR inspected?
46TH AVE DR'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 1,600 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 46TH AVE DR 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 46TH AVE DR?
46TH AVE DR has an NBI inventory load rating of 37.3 metric tons.
Who is responsible for maintaining 46TH AVE DR?
46TH AVE DR is owned and maintained by Private.
How old is 46TH AVE DR and does age affect safety?
46TH AVE DR was built in 1973, making it 53 years old.
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.