Structure 16284700000000 · Cook County, IL

Il 7 over US 45 (la Grange Rd)

Carries Il 7 over US 45 (la Grange Rd), 3.9 M SE Of Il 83.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT209 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

209 ft end to end, longest span 99 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.

Built200719 years old
Length208.7 ft63.6 m
Daily traffic14,700counted 2023
Last inspectedFebruary 2024every 48 months

Location

StateIllinois
CountyCook
Location3.9 M SE Of Il 83
CarriesIl 7
CrossesUS 45 (la Grange Rd)
Coordinates41.63612, -87.85389

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length208.7 ft (63.6 m)
Max Span99.4 ft (30.3 m)
Deck Width39.4 ft (12 m)
Deck Area763.2 sq m
Main Spans2
Year Built2007

Traffic

Avg Daily Traffic14,700 (2023)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016284700000000

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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