Structure 86371500000000 · Scott County, IL

Tr 74 over S Wolf Run Creek

Carries Tr 74 over S Wolf Run Creek, 1.5 Mi S Bluffs.

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
CAR · 15 FT37 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

37 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 box-beam bridge.

Built199531 years old
Length37.1 ft11.3 m
Daily traffic25counted 2020
Last inspectedSeptember 2021every 48 months

Location

StateIllinois
CountyScott
Location1.5 Mi S Bluffs
CarriesTr 74
CrossesS Wolf Run Creek
Coordinates39.73557, -90.50714

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length37.1 ft (11.3 m)
Max Span32.8 ft (10 m)
Deck Width24.0 ft (7.3 m)
Deck Area82.5 sq m
Main Spans1
Year Built1995

Traffic

Avg Daily Traffic25 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2021
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number086371500000000

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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