17TH AV
Carrying 17TH AV over SILVER CREEK
100' S IL-64, Cook, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 17TH AV
The 17TH AV bridge in Cook, Illinois carries 17TH AV over SILVER CREEK. It was built in 1949, making it 77 years old today. The structure is built primarily of concrete and spans 1 section, stretching 11.0 meters (36 feet) end to end. Daily traffic averages 750 vehicles, placing it in the lower-traffic tier of Illinois bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 2/9, superstructure at 2/9, substructure at 7/9. The weakest component sits in critical condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 17.5 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 17TH AV 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 How the historical reference is calculated.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
- 1949
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 11.0 m (36 ft)
- Deck Width
- 17.9 m (59 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 750 vehicles/day
- Structure Number
- 016747600000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates critical at 2/9, severe deterioration that needs urgent attention.
- • The superstructure (beams and supports above the deck) rates critical at 2/9, severe deterioration that needs urgent attention.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
17TH AV 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 17TH AV against other structures in Cook 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 17TH AV?
17TH AV in Cook, Illinois has a deck rating of 2/9, superstructure rating of 2/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is 17TH AV inspected?
17TH AV'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 750 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 17TH AV 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 17TH AV?
17TH AV has an NBI inventory load rating of 17.5 metric tons.
Who is responsible for maintaining 17TH AV?
17TH AV is owned and maintained by City/Municipal Highway Agency.
How old is 17TH AV and does age affect safety?
17TH AV was built in 1949, making it 77 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.