Structure 1327300000000 · Adams County, IL

Tr 297 over Walnut Fork

Carries Tr 297 over Walnut Fork, 3 Mi SE Clayton.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT56 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 8/9

56 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.

Built198145 years old
Length56.1 ft17.1 m
Daily traffic50counted 2024
Last inspectedMarch 2024every 24 months

Location

StateIllinois
CountyAdams
Location3 Mi SE Clayton
CarriesTr 297
CrossesWalnut Fork
Coordinates39.98858, -90.93779

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length56.1 ft (17.1 m)
Max Span53.1 ft (16.2 m)
Deck Width24.3 ft (7.4 m)
Deck Area126.5 sq m
Main Spans1
Year Built1981

Traffic

Avg Daily Traffic50 (2024)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number001327300000000

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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