Structure 71003600000000 · Ogle County, IL

Il 72 over Drainage Ditch

Carries Il 72 over Drainage Ditch, 4.1 Mi E Jct Ill 26.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT65 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

65 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.

Built1929rebuilt 1984
Length65.3 ft19.9 m
Daily traffic2,150counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateIllinois
CountyOgle
Location4.1 Mi E Jct Ill 26
CarriesIl 72
CrossesDrainage Ditch
Coordinates42.12844, -89.49906

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length65.3 ft (19.9 m)
Max Span62.0 ft (18.9 m)
Deck Width35.1 ft (10.7 m)
Deck Area212.9 sq m
Main Spans1
Year Built1929 (reconstructed 1984)

Traffic

Avg Daily Traffic2,150 (2023)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number071003600000000

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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