Structure 1005000000000 · Adams County, IL

Fai 172 SB over Bn Rr

Carries Fai 172 SB over Bn Rr, 1.5mi S I172/us24.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT288 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 6/9

288 ft end to end, longest span 97 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built197650 years old
Length288.4 ft87.9 m
Daily traffic3,675counted 2023
Last inspectedApril 2024every 12 months

Location

StateIllinois
CountyAdams
Location1.5mi S I172/us24
CarriesFai 172 SB
CrossesBn Rr
Coordinates39.98414, -91.30930

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length288.4 ft (87.9 m)
Max Span97.4 ft (29.7 m)
Deck Width42.0 ft (12.8 m)
Deck Area1125.1 sq m
Main Spans3
Year Built1976

Traffic

Avg Daily Traffic3,675 (2023)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number001005000000000

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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