Structure 68005500000000 · Montgomery County, IL

Il 16 over Middle Fk Shoal CR

Carries Il 16 over Middle Fk Shoal CR, 1.75m E Il16/127 Jct.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT139 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

139 ft end to end, longest span 86 ft. 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 multi-beam bridge.

Built198937 years old
Length139.1 ft42.4 m
Daily traffic7,800counted 2023
Last inspectedJune 2024every 48 months

Location

StateIllinois
CountyMontgomery
Location1.75m E Il16/127 Jct
CarriesIl 16
CrossesMiddle Fk Shoal CR
Coordinates39.16478, -89.50207

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length139.1 ft (42.4 m)
Max Span86.0 ft (26.2 m)
Deck Width43.3 ft (13.2 m)
Deck Area559.7 sq m
Main Spans2
Year Built1989

Traffic

Avg Daily Traffic7,800 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number068005500000000

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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