Structure 76000800000000 · Pope County, IL

Ill 146 over Root Lick Branch

Carries Ill 146 over Root Lick Branch, 2.4 Mi E Of Ill 145.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
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 FT45 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

45 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 box-beam bridge.

Built1929rebuilt 2009
Length44.6 ft13.6 m
Daily traffic1,250counted 2023
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyPope
Location2.4 Mi E Of Ill 145
CarriesIll 146
CrossesRoot Lick Branch
Coordinates37.38003, -88.63581

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length44.6 ft (13.6 m)
Max Span42.0 ft (12.8 m)
Deck Width33.1 ft (10.1 m)
Deck Area137.4 sq m
Main Spans1
Year Built1929 (reconstructed 2009)

Traffic

Avg Daily Traffic1,250 (2023)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number076000800000000

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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