Structure 45996600000000 · Kane County, IL

Brier Hill Road over Interstate 90

Carries Brier Hill Road over Interstate 90, I-90 1.4m E Of US 20.

Overall conditionGood

Set by its lowest-rated component: Superstructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT241 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 8/9

241 ft end to end, longest span 119 ft: about 3 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.

Built201313 years old
Length241.5 ft73.6 m
Daily traffic1,350counted 2023
Last inspectedAugust 2024every 24 months

Location

StateIllinois
CountyKane
LocationI-90 1.4m E Of US 20
CarriesBrier Hill Road
CrossesInterstate 90
Coordinates42.13647, -88.48167

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length241.5 ft (73.6 m)
Max Span119.1 ft (36.3 m)
Deck Width37.4 ft (11.4 m)
Deck Area839.0 sq m
Main Spans2
Year Built2013

Traffic

Avg Daily Traffic1,350 (2023)
Truck Traffic5%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number045996600000000

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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