Structure 69000700000000 · Morgan County, IL

Bl72/il104/morton over Town Brook

Carries Bl72/il104/morton over Town Brook, 1.2m W Il267-jacksnv.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

32 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 slab bridge.

Built1952rebuilt 1981
Length32.2 ft9.8 m
Daily traffic16,300counted 2023
Last inspectedNovember 2023every 24 months

Location

StateIllinois
CountyMorgan
Location1.2m W Il267-jacksnv
CarriesBl72/il104/morton
CrossesTown Brook
Coordinates39.72321, -90.25260

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length32.2 ft (9.8 m)
Max Span30.8 ft (9.4 m)
Deck Width78.1 ft (23.8 m)
Deck Area233.2 sq m
Main Spans1
Year Built1952 (reconstructed 1981)

Traffic

Avg Daily Traffic16,300 (2023)
Truck Traffic4%
Lanes On Bridge4

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number069000700000000

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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