Structure 47300000000000 · Kendall County, IL

Millington RD over Fox River

Carries Millington RD over Fox River, Ch3 Over Fox River.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT452 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

452 ft end to end, longest span 150 ft: about 6 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.

Built1958rebuilt 2000
Length451.8 ft137.7 m
Daily traffic1,750counted 2024
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyKendall
LocationCh3 Over Fox River
CarriesMillington RD
CrossesFox River
Coordinates41.56891, -88.59999

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length451.8 ft (137.7 m)
Max Span149.9 ft (45.7 m)
Deck Width31.2 ft (9.5 m)
Deck Area1308.2 sq m
Main Spans3
Year Built1958 (reconstructed 2000)

Traffic

Avg Daily Traffic1,750 (2024)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number047300000000000

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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