Structure 50340200000000 · LaSalle County, IL

Co RD 43 over Tomahawk Creek

Carries Co RD 43 over Tomahawk Creek, E 8th N 3740.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

38 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.

Built1933rebuilt 1985
Length38.1 ft11.6 m
Daily traffic500counted 2020
Last inspectedApril 2023every 24 months

Location

StateIllinois
CountyLaSalle
LocationE 8th N 3740
CarriesCo RD 43
CrossesTomahawk Creek
Coordinates41.47474, -89.01188

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length38.1 ft (11.6 m)
Max Span38.1 ft (11.6 m)
Deck Width29.9 ft (9.1 m)
Deck Area105.6 sq m
Main Spans1
Year Built1933 (reconstructed 1985)

Traffic

Avg Daily Traffic500 (2020)
Truck Traffic26%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number050340200000000

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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