Structure 84016300000000 · Sangamon County, IL

I-72 / US 36 (eb) over Long Point Slough

Carries I-72 / US 36 (eb) over Long Point Slough, 1.5m E Illioplis Int.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT158 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

158 ft end to end, longest span 57 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 multi-beam bridge.

Built197551 years old
Length158.1 ft48.2 m
Daily traffic7,250counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateIllinois
CountySangamon
Location1.5m E Illioplis Int
CarriesI-72 / US 36 (eb)
CrossesLong Point Slough
Coordinates39.83651, -89.22581

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length158.1 ft (48.2 m)
Max Span56.8 ft (17.3 m)
Deck Width42.0 ft (12.8 m)
Deck Area617.0 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic7,250 (2023)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number084016300000000

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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