Structure 98600000000000 · Whiteside County, IL

US 30 over Lincoln St/dakin RD

Carries US 30 over Lincoln St/dakin RD, .5 Mi W Ill 84.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT206 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 8/9

206 ft end to end, longest span 53 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.

Built1955rebuilt 2006
Length205.7 ft62.7 m
Daily traffic9,650counted 2023
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyWhiteside
Location.5 Mi W Ill 84
CarriesUS 30
CrossesLincoln St/dakin RD
Coordinates41.83984, -90.16530

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length205.7 ft (62.7 m)
Max Span52.8 ft (16.1 m)
Deck Width43.3 ft (13.2 m)
Deck Area827.6 sq m
Main Spans4
Year Built1955 (reconstructed 2006)

Traffic

Avg Daily Traffic9,650 (2023)
Truck Traffic13%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number098600000000000

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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