Structure 22013800000000 · DuPage County, IL

I-355 SB over Rohlwing RD

Carries I-355 SB over Rohlwing RD, 0.5 M N Il 53 & Us20.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT262 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

262 ft end to end, longest span 134 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1970rebuilt 1988
Length262.1 ft79.9 m
Daily traffic70,250counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateIllinois
CountyDuPage
Location0.5 M N Il 53 & Us20
CarriesI-355 SB
CrossesRohlwing RD
Coordinates41.95389, -88.03162

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length262.1 ft (79.9 m)
Max Span133.5 ft (40.7 m)
Deck Width110.9 ft (33.8 m)
Deck Area2700.6 sq m
Main Spans3
Year Built1970 (reconstructed 1988)

Traffic

Avg Daily Traffic70,250 (2023)
Truck Traffic10%
Lanes On Bridge6
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number022013800000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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