Structure 1800016 · Delaware County, IN

Walnut ST over Mississinewa River

Carries Walnut ST over Mississinewa River, 00.10 N Of CR 1050 N.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT329 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 6/9

329 ft end to end, longest span 82 ft: about 5 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built196660 years old
Length329.4 ft100.4 m
Daily traffic3,370counted 2023
Last inspectedOctober 2024every 24 months

Location

StateIndiana
CountyDelaware
Location00.10 N Of CR 1050 N
CarriesWalnut ST
CrossesMississinewa River
Coordinates40.34385, -85.38848

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length329.4 ft (100.4 m)
Max Span81.7 ft (24.9 m)
Deck Width29.9 ft (9.1 m)
Deck Area913.6 sq m
Main Spans4
Year Built1966

Traffic

Avg Daily Traffic3,370 (2023)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number1800016

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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