LASALLE STREET
Carrying LASALLE STREET over TROLLEY CAR TUNNEL
S. OF CHICAGO RIVER, Cook, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: LASALLE STREET
The LASALLE STREET bridge in Cook, Illinois carries LASALLE STREET over TROLLEY CAR TUNNEL. It was built in 1911, making it 115 years old today. It was last reconstructed in 1945, extending its service life. The structure is built primarily of steel and spans 1 section, stretching 32.9 meters (108 feet) end to end. Daily traffic averages 4,750 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 3/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 31.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How LASALLE STREET 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 How the historical reference is calculated.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
- 1911
- Last Reconstructed
- 1945
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 32.9 m (108 ft)
- Deck Width
- 10.5 m (34 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 4,750 vehicles/day
- Structure Number
- 016617500000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 3/9, the deck (driving surface) is in poor shape, with advanced wear flagged for priority repair.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
LASALLE STREET 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 LASALLE STREET 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 LASALLE STREET?
LASALLE STREET in Cook, Illinois has a deck rating of 3/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is LASALLE STREET inspected?
LASALLE STREET'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 4,750 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. LASALLE STREET 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 LASALLE STREET?
LASALLE STREET has an NBI inventory load rating of 31.4 metric tons.
Who is responsible for maintaining LASALLE STREET?
LASALLE STREET is owned and maintained by City/Municipal Highway Agency.
How old is LASALLE STREET and does age affect safety?
LASALLE STREET was built in 1911, making it 115 years old and last reconstructed in 1945.
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.