Structure 47317900000000 · Kendall County, IL

Galena Rd/fau 2502 over Blackberry Creek

Carries Galena Rd/fau 2502 over Blackberry Creek, Ch9 Ovr Blackberry.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT133 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

133 ft end to end, longest span 36 ft. 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 slab bridge.

Built20188 years old
Length133.2 ft40.6 m
Daily traffic7,800counted 2024
Last inspectedSeptember 2024every 48 months

Location

StateIllinois
CountyKendall
LocationCh9 Ovr Blackberry
CarriesGalena Rd/fau 2502
CrossesBlackberry Creek
Coordinates41.69754, -88.41359

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length133.2 ft (40.6 m)
Max Span36.1 ft (11 m)
Deck Width43.0 ft (13.1 m)
Deck Area531.9 sq m
Main Spans4
Year Built2018

Traffic

Avg Daily Traffic7,800 (2024)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number047317900000000

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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