Structure 55007900000000 · McDonough County, IL

Il 9 over Shaw Creek

Carries Il 9 over Shaw Creek, 0.75 Mi E Of Ill 41.

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
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT95 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

95 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 multi-beam bridge.

Built201016 years old
Length94.8 ft28.9 m
Daily traffic800counted 2023
Last inspectedDecember 2020every 48 months

Location

StateIllinois
CountyMcDonough
Location0.75 Mi E Of Ill 41
CarriesIl 9
CrossesShaw Creek
Coordinates40.58413, -90.44695

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length94.8 ft (28.9 m)
Max Span91.9 ft (28 m)
Deck Width35.1 ft (10.7 m)
Deck Area309.2 sq m
Main Spans1
Year Built2010

Traffic

Avg Daily Traffic800 (2023)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2020
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number055007900000000

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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