Structure 101021200000000 · Winnebago County, IL

I39 NB Ramp over Linden RD

Carries I39 NB Ramp over Linden RD, Over Linden RD.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT161 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

161 ft end to end: 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.

Built20242 years old
Length161.4 ft49.2 m
Daily traffic12,600counted 2023
Last inspectedAugust 2024every 24 months

Location

StateIllinois
CountyWinnebago
LocationOver Linden RD
CarriesI39 NB Ramp
CrossesLinden RD
Coordinates42.21689, -89.01042

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length161.4 ft (49.2 m)
Deck Width56.8 ft (17.3 m)
Deck Area851.2 sq m
Main Spans1
Year Built2024

Traffic

Avg Daily Traffic12,600 (2023)
Truck Traffic38%
Lanes On Bridge1
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number101021200000000

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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