Structure 87345900000000 · Shelby County, IL

Tr 145 over Mud Creek

Carries Tr 145 over Mud Creek, 2 Mi E Dollville.

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 overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

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

A culvert 22 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built199135 years old
Length21.7 ft6.6 m
Daily traffic75counted 2024
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyShelby
Location2 Mi E Dollville
CarriesTr 145
CrossesMud Creek
Coordinates39.43460, -88.95025

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length21.7 ft (6.6 m)
Max Span9.8 ft (3 m)
Deck Area40.3 sq m
Main Spans2
Year Built1991

Traffic

Avg Daily Traffic75 (2024)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number087345900000000

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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