Structure 82021000000000 · St. Clair County, IL

Il 158 SB over Trail Nsrr Metrolink RD

Carries Il 158 SB over Trail Nsrr Metrolink RD, 0.5 Mi W Of Scott Afb.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT204 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

204 ft end to end, longest span 82 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.

Built1972rebuilt 2001
Length203.7 ft62.1 m
Daily traffic9,150counted 2023
Last inspectedSeptember 2024every 48 months

Location

StateIllinois
CountySt. Clair
Location0.5 Mi W Of Scott Afb
CarriesIl 158 SB
CrossesTrail Nsrr Metrolink RD
Coordinates38.53405, -89.88379

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length203.7 ft (62.1 m)
Max Span82.0 ft (25 m)
Deck Width42.0 ft (12.8 m)
Deck Area794.9 sq m
Main Spans3
Year Built1972 (reconstructed 2001)

Traffic

Avg Daily Traffic9,150 (2023)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number082021000000000

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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