ARSENAL RD
Carrying ARSENAL RD over SYLVAN SLOUGH
VIADUCT RI ARSENAL, Rock Island, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
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 records show a deck rating of 5/9, superstructure at 5/9, substructure at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 30.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ARSENAL RD compares
Live comparison across Illinois.
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 How the historical reference is calculated.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
- 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
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗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.
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.
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.