Structure 34550600000000 · Hancock County, IL

Tr 46 over Larry Creek

Carries Tr 46 over Larry Creek, 6.0 S Nauvoo.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 6/9

50 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.

Built196957 years old
Length49.9 ft15.2 m
Daily traffic50counted 2023
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyHancock
Location6.0 S Nauvoo
CarriesTr 46
CrossesLarry Creek
Coordinates40.47149, -91.33183

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length49.9 ft (15.2 m)
Max Span47.9 ft (14.6 m)
Deck Width24.3 ft (7.4 m)
Deck Area112.5 sq m
Main Spans1
Year Built1969

Traffic

Avg Daily Traffic50 (2023)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number034550600000000

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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