Structure 16995800000000 · Cook County, IL

Linden AVE over N Shore Channel

Carries Linden AVE over N Shore Channel, Wilmette.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT144 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 6/9

144 ft end to end, longest span 71 ft: about 2 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 girder bridge.

Built1909117 years old
Length144.0 ft43.9 m
Daily traffic2,300counted 2022
Last inspectedNovember 2022every 24 months

Location

StateIllinois
CountyCook
LocationWilmette
CarriesLinden AVE
CrossesN Shore Channel
Coordinates42.07373, -87.68780

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length144.0 ft (43.9 m)
Max Span70.9 ft (21.6 m)
Deck Width38.7 ft (11.8 m)
Deck Area518.0 sq m
Main Spans3
Year Built1909

Traffic

Avg Daily Traffic2,300 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2022
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number016995800000000

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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