Structure 62481400000000 · Marshall County, IL

Tr 76 (th-s28) over Snag Creek

Carries Tr 76 (th-s28) over Snag Creek, T29n-r2w-3pm Sec 33.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructuresets the rating3/9 · Serious
Substructure4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 3/9 · sets the ratingSubstructure 4/9

41 ft end to end. 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 box-beam bridge.

Built1935rebuilt 1969
Length41.0 ft12.5 m
Daily traffic50counted 2024
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyMarshall
LocationT29n-r2w-3pm Sec 33
CarriesTr 76 (th-s28)
CrossesSnag Creek
Coordinates40.92642, -89.34735

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length41.0 ft (12.5 m)
Max Span40.0 ft (12.2 m)
Deck Width18.0 ft (5.5 m)
Deck Area68.8 sq m
Main Spans1
Year Built1935 (reconstructed 1969)

Traffic

Avg Daily Traffic50 (2024)
Truck Traffic28%
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 Number062481400000000

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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