Structure 71506000000000 · Ogle County, IL

Devils Backbone RD over Gale Creek

Carries Devils Backbone RD over Gale Creek, 1.5 Mi W Oregon.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT51 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 51 ft across with 4 openings. 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, so those are drawn as typical for a culvert.

Built197254 years old
Length50.9 ft15.5 m
Daily traffic375counted 2022
Last inspectedAugust 2023every 24 months

Location

StateIllinois
CountyOgle
Location1.5 Mi W Oregon
CarriesDevils Backbone RD
CrossesGale Creek
Coordinates42.00280, -89.36383

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length50.9 ft (15.5 m)
Max Span12.1 ft (3.7 m)
Deck Width29.5 ft (9 m)
Deck Area139.5 sq m
Main Spans4
Year Built1972

Traffic

Avg Daily Traffic375 (2022)
Truck Traffic64%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number071506000000000

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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