Structure 101310300000000 · Winnebago County, IL

Perryville RD over Union Pacific Railro

Carries Perryville RD over Union Pacific Railro, .2 Mi N I-39.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT177 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 8/9

177 ft end to end, longest span 67 ft: about 2 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.

Built201610 years old
Length177.5 ft54.1 m
Daily traffic7,450counted 2022
Last inspectedSeptember 2022every 48 months

Location

StateIllinois
CountyWinnebago
Location.2 Mi N I-39
CarriesPerryville RD
CrossesUnion Pacific Railro
Coordinates42.22973, -88.97946

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length177.5 ft (54.1 m)
Max Span66.9 ft (20.4 m)
Deck Width43.3 ft (13.2 m)
Deck Area714.1 sq m
Main Spans3
Year Built2016

Traffic

Avg Daily Traffic7,450 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2022
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number101310300000000

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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