Structure 19004300000000 · DeKalb County, IL

Il 23 over E Br S Br Kishw Riv

Carries Il 23 over E Br S Br Kishw Riv, 0.4 Mi N Jct Ill 64.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT121 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

121 ft end to end, longest span 43 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 slab bridge.

Built200323 years old
Length120.7 ft36.8 m
Daily traffic10,500counted 2023
Last inspectedMarch 2021every 48 months

Location

StateIllinois
CountyDeKalb
Location0.4 Mi N Jct Ill 64
CarriesIl 23
CrossesE Br S Br Kishw Riv
Coordinates41.99508, -88.68297

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length120.7 ft (36.8 m)
Max Span42.7 ft (13 m)
Deck Width74.8 ft (22.8 m)
Deck Area839.0 sq m
Main Spans3
Year Built2003

Traffic

Avg Daily Traffic10,500 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number019004300000000

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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