Structure 32180 · Clinton County, IN

US 421 over Prairie Creek

Carries US 421 over Prairie Creek, 00.06 S SR 39.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very 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 FT51 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

51 ft end to end, longest span 20 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 slab bridge.

Built1965rebuilt 1995
Length50.9 ft15.5 m
Daily traffic12,516counted 2021
Last inspectedFebruary 2023every 24 months

Location

StateIndiana
CountyClinton
Location00.06 S SR 39
CarriesUS 421
CrossesPrairie Creek
Coordinates40.27969, -86.50940

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length50.9 ft (15.5 m)
Max Span19.7 ft (6 m)
Deck Width66.3 ft (20.2 m)
Deck Area313.1 sq m
Main Spans3
Year Built1965 (reconstructed 1995)

Traffic

Avg Daily Traffic12,516 (2021)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number032180

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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