ARSENAL RD
Carrying ARSENAL RD over SYLVAN SLOUGH
VIADUCT RI ARSENAL, Rock Island, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
ARSENAL RD in Rock Island, Illinois sits above 20% of rated Illinois bridges on inventory load rating (30 t), while its 1906 build year is earlier than 99% of Rock Island's recorded-year cohort (272 bridges).
ARSENAL RD in Rock Island, Illinois is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1906, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair 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:000000000819904
PRE-1950 · STEEL · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- STEEL Steel
- LONG-SPAN-RUN 8 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
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: ARSENAL RD
The ARSENAL RD bridge in Rock Island, Illinois carries ARSENAL RD over SYLVAN SLOUGH. It was built in 1906, making it 120 years old today. It was last reconstructed in 1967, extending its service life. The structure is built primarily of steel and spans 8 sections, stretching 183.9 meters (603 feet) end to end. Daily traffic averages 8,900 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by NASA.
The latest FHWA inspection places the weakest component in fair condition (see the full component ratings below). No reported major component scores in the Poor range under the current federal condition thresholds.
How ARSENAL RD compares
Age against the county: built in 1906, earlier than 268 of Rock Island's 272 bridges with a recorded construction year (99%), 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).
ARSENAL RD vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
30 Top 80% higher than 20% 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
- 1906
- Last Reconstructed
- 1967
- Material
- Steel
- Number of Spans
- 8
- Structure Length
- 183.9 m (603 ft)
- Deck Width
- 10.0 m (33 ft)
- Owner
- NASA
- Avg Daily Traffic
- 8,900 vehicles/day
- Structure Number
- 000000000819904
Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • 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
This page shows what the last federal inspection recorded, not whether ARSENAL RD 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 ARSENAL RD 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 ARSENAL RD?
ARSENAL RD in Rock Island, Illinois has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is ARSENAL RD inspected?
ARSENAL RD'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 8,900 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ARSENAL RD 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 ARSENAL RD?
ARSENAL RD has an NBI inventory load rating of 30.1 metric tons.
Who is responsible for maintaining ARSENAL RD?
ARSENAL RD is owned and maintained by NASA.
How old is ARSENAL RD and does age affect safety?
ARSENAL RD was built in 1906, making it 120 years old and last reconstructed in 1967.
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.