Structure 50361100000000 · LaSalle County, IL

Ch 15 over Wolf Creek

Carries Ch 15 over Wolf Creek, E 22nd N 1830.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT49 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

49 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 multi-beam bridge.

Built201412 years old
Length48.9 ft14.9 m
Daily traffic950counted 2020
Last inspectedAugust 2020every 48 months

Location

StateIllinois
CountyLaSalle
LocationE 22nd N 1830
CarriesCh 15
CrossesWolf Creek
Coordinates41.19916, -88.74123

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length48.9 ft (14.9 m)
Max Span45.3 ft (13.8 m)
Deck Width30.8 ft (9.4 m)
Deck Area140.1 sq m
Main Spans1
Year Built2014

Traffic

Avg Daily Traffic950 (2020)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2020
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number050361100000000

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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