Structure 91500600000000 · Union County, IL

Fas 923 over Unnamed Stream

Carries Fas 923 over Unnamed Stream, W Edge Unionco Forst.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 29 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built197056 years old
Length29.2 ft8.9 m
Daily traffic400counted 2020
Last inspectedFebruary 2025every 24 months

Location

StateIllinois
CountyUnion
LocationW Edge Unionco Forst
CarriesFas 923
CrossesUnnamed Stream
Coordinates37.48597, -89.36692

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length29.2 ft (8.9 m)
Max Span14.1 ft (4.3 m)
Deck Area81.0 sq m
Main Spans2
Year Built1970

Traffic

Avg Daily Traffic400 (2020)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number091500600000000

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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