Structure 16135100000000 · Cook County, IL

US 12 45 Mannheim over Addison CR

Carries US 12 45 Mannheim over Addison CR, 565 N Of Lake St..

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT45 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

45 ft end to end. Lengths and the car 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 slab bridge.

Built20188 years old
Length44.6 ft13.6 m
Daily traffic38,900counted 2023
Last inspectedJanuary 2024every 24 months

Location

StateIllinois
CountyCook
Location565 N Of Lake St.
CarriesUS 12 45 Mannheim
CrossesAddison CR
Coordinates41.89904, -87.88377

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length44.6 ft (13.6 m)
Max Span39.4 ft (12 m)
Deck Width105.6 ft (32.2 m)
Deck Area437.9 sq m
Main Spans1
Year Built2018

Traffic

Avg Daily Traffic38,900 (2023)
Truck Traffic11%
Lanes On Bridge6

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number016135100000000

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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