Structure 86370800000000 · Scott County, IL

Tr 74 over Wolf Run Creek

Carries Tr 74 over Wolf Run Creek, 1 Mi E Bluffs.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT86 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

86 ft end to end, longest span 27 ft. 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 channel-beam bridge.

Built196561 years old
Length86.0 ft26.2 m
Daily traffic75counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateIllinois
CountyScott
Location1 Mi E Bluffs
CarriesTr 74
CrossesWolf Run Creek
Coordinates39.74928, -90.52216

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length86.0 ft (26.2 m)
Max Span27.2 ft (8.3 m)
Deck Width26.2 ft (8 m)
Deck Area209.6 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic75 (2020)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number086370800000000

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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