Il 171 NB To I-55 over San & Ship Canal

Fair Condition45 years old14,500 vehicles/day

Location

StateIllinois
CountyCook
Location1 M N Archer AVE
CarriesIl 171 NB To I-55
CrossesSan & Ship Canal
Coordinates41.79187, -87.81577

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure5 (Fair)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length635.2 ft (193.6 m)
Max Span188.3 ft (57.4 m)
Deck Width27.9 ft (8.5 m)
Deck Area1645.6 sq m
Main Spans5
Year Built1981 (reconstructed 2001)

Traffic

Avg Daily Traffic14,500 (2023)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number016240800000000

Nearby Bridges

Il 171 SB First Av over Rr - Cn 0.0 mi Fair Il 171 NB First Av over Rr - Cn 0.0 mi Fair Il 171 NB First Av over S&s Canal 0.2 mi Fair Il 171 SB First Av over S&s Canal 0.2 mi Fair Il 171 NB First Av over I- 55 Stevenson 0.3 mi Good Il 171 SB First Av over I- 55 Stevenson 0.3 mi Good Il 171 SB Rmp I-55 over I- 55 Stevenson 0.3 mi Good I- 55 EB Stevenson over San & Ship Canal 0.3 mi Fair I- 55 WB Stevenson over San & Ship Canal 0.3 mi Fair I- 55 WB Rmp Il171 over Des Plaines River 0.4 mi Poor