Structure 60319000000000 · Madison County, IL

Fas 773/ Alhambra over Silver Ck

Carries Fas 773/ Alhambra over Silver Ck, 1.0mi N Alhambra.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT213 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 6/9Substructure 7/9

213 ft end to end, longest span 80 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.

Built197155 years old
Length212.9 ft64.9 m
Daily traffic600counted 2021
Last inspectedNovember 2023every 24 months

Location

StateIllinois
CountyMadison
Location1.0mi N Alhambra
CarriesFas 773/ Alhambra
CrossesSilver Ck
Coordinates38.91343, -89.75889

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length212.9 ft (64.9 m)
Max Span80.1 ft (24.4 m)
Deck Width31.8 ft (9.7 m)
Deck Area629.5 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic600 (2021)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number060319000000000

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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