Structure 45993100000000 · Kane County, IL

Il31 Rmp To I88wb over I-88 E-w Toll

Carries Il31 Rmp To I88wb over I-88 E-w Toll, 0.2mi W Of Il31.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT181 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

181 ft end to end, longest span 97 ft: about 3 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.

Built200818 years old
Length181.4 ft55.3 m
Daily traffic1,850counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateIllinois
CountyKane
Location0.2mi W Of Il31
CarriesIl31 Rmp To I88wb
CrossesI-88 E-w Toll
Coordinates41.79595, -88.32753

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length181.4 ft (55.3 m)
Max Span96.8 ft (29.5 m)
Deck Width70.5 ft (21.5 m)
Deck Area1189.0 sq m
Main Spans2
Year Built2008

Traffic

Avg Daily Traffic1,850 (2023)
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number045993100000000

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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