Structure 7100093 · St. Joseph County, IN

Walnut RD over Potato Creek

Carries Walnut RD over Potato Creek, 00.30 N Of Quinn RD.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructuresets the rating3/9 · Serious
Substructure5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT55 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 3/9 · sets the ratingSubstructure 5/9

55 ft end to end. 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 box-beam bridge.

Built1968rebuilt 1977
Length54.8 ft16.7 m
Daily traffic386counted 2021
Last inspectedSeptember 2024every 12 months

Location

StateIndiana
CountySt. Joseph
Location00.30 N Of Quinn RD
CarriesWalnut RD
CrossesPotato Creek
Coordinates41.52417, -86.47700

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length54.8 ft (16.7 m)
Max Span43.0 ft (13.1 m)
Deck Width27.9 ft (8.5 m)
Deck Area141.9 sq m
Main Spans1
Year Built1968 (reconstructed 1977)

Traffic

Avg Daily Traffic386 (2021)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number7100093

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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