Structure 6414000000000 · Bureau County, IL

Tr 307 over Adams Creek

Carries Tr 307 over Adams Creek, E. Edge Of Depue.

Overall conditionPoor

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

How ratings work
Deck4/9 · Poor
Superstructuresets the rating3/9 · Serious
Substructuresets the rating3/9 · Serious
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT103 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 3/9 · sets the ratingSubstructure 3/9 · sets the rating

103 ft end to end, longest span 61 ft. 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 multi-beam bridge.

Built195076 years old
Length103.0 ft31.4 m
Daily traffic50counted 2010
Last inspectedNovember 2023every 24 months

Location

StateIllinois
CountyBureau
LocationE. Edge Of Depue
CarriesTr 307
CrossesAdams Creek
Coordinates41.32794, -89.27889

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length103.0 ft (31.4 m)
Max Span61.0 ft (18.6 m)
Deck Width22.0 ft (6.7 m)
Deck Area210.4 sq m
Main Spans3
Year Built1950

Traffic

Avg Daily Traffic50 (2010)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number006414000000000

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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