Structure 76304700000000 · Pope County, IL

Tr 88a over Bay CR Ditch

Carries Tr 88a over Bay CR Ditch, 2 Mi East RT 145.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT82 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

82 ft end to end, longest span 40 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 channel-beam bridge.

Built197848 years old
Length82.0 ft25 m
Daily traffic50counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateIllinois
CountyPope
Location2 Mi East RT 145
CarriesTr 88a
CrossesBay CR Ditch
Coordinates37.32493, -88.63363

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length82.0 ft (25 m)
Max Span40.0 ft (12.2 m)
Deck Width22.6 ft (6.9 m)
Deck Area172.5 sq m
Main Spans3
Year Built1978

Traffic

Avg Daily Traffic50 (2023)
Truck Traffic22%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number076304700000000

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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