Structure 54510100000000 · Logan County, IL

Tr 176 over Lake Fork Ck Trib

Carries Tr 176 over Lake Fork Ck Trib, 1 W 1mi S Lake Fork.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT51 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

51 ft end to end, longest span 15 ft. 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 slab bridge.

Built195967 years old
Length50.9 ft15.5 m
Daily traffic100counted 2022
Last inspectedNovember 2023every 24 months

Location

StateIllinois
CountyLogan
Location1 W 1mi S Lake Fork
CarriesTr 176
CrossesLake Fork Ck Trib
Coordinates39.95261, -89.36227

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length50.9 ft (15.5 m)
Max Span15.1 ft (4.6 m)
Deck Width25.9 ft (7.9 m)
Deck Area122.5 sq m
Main Spans3
Year Built1959

Traffic

Avg Daily Traffic100 (2022)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number054510100000000

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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