Structure 87323400000000 · Shelby County, IL

Tr 373 over Stream

Carries Tr 373 over Stream, 1.7 Mi NW Cowden.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
22 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built1909117 years old
Length22.3 ft6.8 m
Daily traffic125counted 2024
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyShelby
Location1.7 Mi NW Cowden
CarriesTr 373
CrossesStream
Coordinates39.27466, -88.87069

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length22.3 ft (6.8 m)
Max Span21.3 ft (6.5 m)
Deck Width19.4 ft (5.9 m)
Deck Area40.1 sq m
Main Spans1
Year Built1909

Traffic

Avg Daily Traffic125 (2024)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number087323400000000

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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