Structure 58322900000000 · Macon County, IL

Tr 46 (drummer Rd) over Lake Fork

Carries Tr 46 (drummer Rd) over Lake Fork, 6.0 Mi N Warrenburg.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure and Substructure at 0 of 9.

How ratings work
Decksets the rating0/9 · Failed
Superstructuresets the rating0/9 · Failed
Substructuresets the rating0/9 · Failed
Channelnot part of overall0/9 · Failed
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 0/9Superstructure 0/9Substructure 0/9

40 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built197650 years old
Length40.0 ft12.2 m
Daily traffic25counted 2020
Last inspectedFebruary 2025every 24 months

Location

StateIllinois
CountyMacon
Location6.0 Mi N Warrenburg
CarriesTr 46 (drummer Rd)
CrossesLake Fork
Coordinates40.02045, -89.06677

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length40.0 ft (12.2 m)
Max Span38.1 ft (11.6 m)
Deck Width22.3 ft (6.8 m)
Deck Area83.0 sq m
Main Spans1
Year Built1976

Traffic

Avg Daily Traffic25 (2020)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number058322900000000

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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