Structure 92011100000000 · Vermilion County, IL

Tr 42a over Middle Fork Verm Riv

Carries Tr 42a over Middle Fork Verm Riv, 0.2 Mi S Armstrong.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT153 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 5/9

153 ft end to end: about 2 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 through truss.

Built1910rebuilt 1970
Length153.2 ft46.7 m
Daily traffic10counted 2023
Last inspectedFebruary 2022every 24 months

Location

StateIllinois
CountyVermilion
Location0.2 Mi S Armstrong
CarriesTr 42a
CrossesMiddle Fork Verm Riv
Coordinates40.29898, -87.87743

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length153.2 ft (46.7 m)
Max Span150.3 ft (45.8 m)
Deck Width19.0 ft (5.8 m)
Deck Area270.9 sq m
Main Spans1
Year Built1910 (reconstructed 1970)

Traffic

Avg Daily Traffic10 (2023)
Truck Traffic20%
Lanes On Bridge1

Inspection & Ownership

Last InspectionFebruary 2022
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number092011100000000

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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