Structure 53415100000000 · Livingston County, IL

Tr 21 over Moon Creek

Carries Tr 21 over Moon Creek, 375e 3050n.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT74 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

74 ft end to end, longest span 24 ft. 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 channel-beam bridge.

Built199927 years old
Length74.1 ft22.6 m
Daily traffic100counted 2023
Last inspectedDecember 2020every 48 months

Location

StateIllinois
CountyLivingston
Location375e 3050n
CarriesTr 21
CrossesMoon Creek
Coordinates41.06818, -88.85648

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length74.1 ft (22.6 m)
Max Span24.0 ft (7.3 m)
Deck Width26.2 ft (8 m)
Deck Area180.8 sq m
Main Spans3
Year Built1999

Traffic

Avg Daily Traffic100 (2023)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2020
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number053415100000000

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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