Structure 45302900000000 · Kane County, IL

Randall Road over Mill Creek

Carries Randall Road over Mill Creek, 0.7 Mi S. Main ST.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT69 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

69 ft end to end, longest span 32 ft. 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 slab bridge.

Built1953rebuilt 1981
Length68.9 ft21 m
Daily traffic29,900counted 2023
Last inspectedMarch 2024every 24 months

Location

StateIllinois
CountyKane
Location0.7 Mi S. Main ST
CarriesRandall Road
CrossesMill Creek
Coordinates41.83691, -88.34006

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length68.9 ft (21 m)
Max Span32.2 ft (9.8 m)
Deck Width70.9 ft (21.6 m)
Deck Area453.6 sq m
Main Spans2
Year Built1953 (reconstructed 1981)

Traffic

Avg Daily Traffic29,900 (2023)
Truck Traffic6%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number045302900000000

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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