Structure 50201800000000 · LaSalle County, IL

Fai 39 Rmp#15.90 over Conveyor Belt/pvt RD

Carries Fai 39 Rmp#15.90 over Conveyor Belt/pvt RD, 600 Ft S Of US 6.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 48 ft across. 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, so those are drawn as typical for a culvert.

Built198541 years old
Length48.2 ft14.7 m
Daily traffic950counted 2020
Last inspectedFebruary 2024every 24 months

Location

StateIllinois
CountyLaSalle
Location600 Ft S Of US 6
CarriesFai 39 Rmp#15.90
CrossesConveyor Belt/pvt RD
Coordinates41.33534, -89.07094

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length48.2 ft (14.7 m)
Max Span43.0 ft (13.1 m)
Deck Width29.9 ft (9.1 m)
Deck Area133.8 sq m
Main Spans1
Year Built1985

Traffic

Avg Daily Traffic950 (2020)
Truck Traffic18%
Lanes On Bridge1

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number050201800000000

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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