I- 90 94 DAN RYAN
I- 90 94 DAN RYAN in Just North Of 39th, Cook County, Illinois received a condition grade of F (0/100). Built in 1961, the bridge carries 312K vehicles daily on I- 90 94 DAN RYAN over Sanitary Sewer. It is classified as structurally deficient.
I- 90 94 DAN RYAN carries an F on the BridgeSafety Condition Score with 0/100 — the bottom tier of the FHWA NBI distribution. Component ratings flag the structure for near-term rehabilitation or replacement; the bridge may remain open to traffic but is on the priority list for action.
The bridge was built in 1961 and is now 65 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I- 90 94 DAN RYAN carries an average daily traffic count of 312,400 vehicles, with 14 lane(s) crossing Sanitary Sewer. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I- 90 94 DAN RYAN is a 65-year-old bridge located Just North Of 39th in Cook County, Illinois. The bridge carries I- 90 94 DAN RYAN over Sanitary Sewer with 14 traffic lanes, handling approximately 312K vehicles per day. Built in 1961, the structure spans 9.1 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I- 90 94 DAN RYAN has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
I- 90 94 DAN RYAN was built in 1961, making it 65 years old. The average bridge age in the United States is 48 years.
I- 90 94 DAN RYAN carries approximately 312K vehicles per day (average daily traffic). The bridge has 14 traffic lanes. It is 9.1 meters long and located on I- 90 94 DAN RYAN in Just North Of 39th, Cook County, Illinois.
Yes, I- 90 94 DAN RYAN is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
I- 90 94 DAN RYAN is located Just North Of 39th in Cook County, Illinois. The bridge carries I- 90 94 DAN RYAN over Sanitary Sewer. Its coordinates are 41.823797, -87.630872. It is maintained by State Highway Agency.
I- 90 94 DAN RYAN carries I- 90 94 DAN RYAN over Sanitary Sewer. The bridge is 9.1 meters long and was built in 1961.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.