Structure 28006100000000 · Franklin County, IL

North Rd-w Frankfo over Interstate 57

Carries North Rd-w Frankfo over Interstate 57, Near Scl W Frankfort.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT204 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 8/9

204 ft end to end, longest span 64 ft: about 3 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.

Built196264 years old
Length203.7 ft62.1 m
Daily traffic675counted 2024
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyFranklin
LocationNear Scl W Frankfort
CarriesNorth Rd-w Frankfo
CrossesInterstate 57
Coordinates37.89162, -88.94510

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length203.7 ft (62.1 m)
Max Span63.6 ft (19.4 m)
Deck Width29.9 ft (9.1 m)
Deck Area565.1 sq m
Main Spans4
Year Built1962

Traffic

Avg Daily Traffic675 (2024)
Truck Traffic8%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number028006100000000

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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