Structure 91312400000000 · Union County, IL

Tr 79a over Clear Creek Trib

Carries Tr 79a over Clear Creek Trib, 0.9 Mi.e Of Ill 127.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT92 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

92 ft end to end, longest span 30 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.

Built197749 years old
Length91.9 ft28 m
Daily traffic175counted 2020
Last inspectedMarch 2021every 48 months

Location

StateIllinois
CountyUnion
Location0.9 Mi.e Of Ill 127
CarriesTr 79a
CrossesClear Creek Trib
Coordinates37.52386, -89.29803

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length91.9 ft (28 m)
Max Span29.9 ft (9.1 m)
Deck Width22.6 ft (6.9 m)
Deck Area193.2 sq m
Main Spans3
Year Built1977

Traffic

Avg Daily Traffic175 (2020)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2021
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number091312400000000

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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