Structure 99013700000000 · Will County, IL

Il 7 over I & M Canal

Carries Il 7 over I & M Canal, 0.2 M W Of Il 171.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT132 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

132 ft end to end, longest span 52 ft. 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.

Built1951rebuilt 2002
Length131.6 ft40.1 m
Daily traffic24,400counted 2023
Last inspectedApril 2021every 48 months

Location

StateIllinois
CountyWill
Location0.2 M W Of Il 171
CarriesIl 7
CrossesI & M Canal
Coordinates41.58979, -88.05901

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length131.6 ft (40.1 m)
Max Span51.8 ft (15.8 m)
Deck Width52.2 ft (15.9 m)
Deck Area637.6 sq m
Main Spans3
Year Built1951 (reconstructed 2002)

Traffic

Avg Daily Traffic24,400 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number099013700000000

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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