Structure 90802000025114 · Jackson County, IL

Nfsr 724 over Johnson Creek

Carries Nfsr 724 over Johnson Creek, 0.1 Mi. S. Of HWY 151.

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
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

24 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built201610 years old
Length23.6 ft7.2 m
Daily traffic100counted 2016
Last inspectedJune 2023every 24 months

Location

StateIllinois
CountyJackson
Location0.1 Mi. S. Of HWY 151
CarriesNfsr 724
CrossesJohnson Creek
Coordinates37.84080, -89.51610

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length23.6 ft (7.2 m)
Max Span19.0 ft (5.8 m)
Deck Width28.5 ft (8.7 m)
Deck Area62.6 sq m
Main Spans1
Year Built2016

Traffic

Avg Daily Traffic100 (2016)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number090802000025114

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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