Structure 93308300000000 · Wabash County, IL

Ch-11 (edwards Co) over Bonpas Creek

Carries Ch-11 (edwards Co) over Bonpas Creek, 0.5 Mi W Cowling.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT156 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

156 ft end to end, longest span 52 ft: 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 box-beam bridge.

Built198145 years old
Length155.8 ft47.5 m
Last inspectedFebruary 2025every 48 months

Location

StateIllinois
CountyWabash
Location0.5 Mi W Cowling
CarriesCh-11 (edwards Co)
CrossesBonpas Creek
Coordinates38.31278, -87.94844

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length155.8 ft (47.5 m)
Max Span51.8 ft (15.8 m)
Deck Width24.3 ft (7.4 m)
Deck Area351.5 sq m
Main Spans3
Year Built1981

Traffic

Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number093308300000000

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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