Structure 80500500000000 · Richland County, IL

Tr-157a over Trib Sugar Creek

Carries Tr-157a over Trib Sugar Creek, 2.5 Mi SW Olney.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 26 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.

Built198739 years old
Length25.6 ft7.8 m
Daily traffic75counted 2022
Last inspectedJanuary 2022every 48 months

Location

StateIllinois
CountyRichland
Location2.5 Mi SW Olney
CarriesTr-157a
CrossesTrib Sugar Creek
Coordinates38.70025, -88.14488

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length25.6 ft (7.8 m)
Max Span12.5 ft (3.8 m)
Deck Area47.6 sq m
Main Spans2
Year Built1987

Traffic

Avg Daily Traffic75 (2022)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2022
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number080500500000000

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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