Structure 7490 · Allen County, IN

US 27 NB over ST Marys River

Carries US 27 NB over ST Marys River, 02.60 S SR 930.

Overall conditionGood

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

How ratings work
Deck8/9 · Very 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
SEMI-TRUCK · 72 FT313 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 7/9 · sets the rating

313 ft end to end, longest span 84 ft: about 4 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.

Built1959rebuilt 2023
Length312.7 ft95.3 m
Daily traffic20,087counted 2019
Last inspectedApril 2024every 24 months

Location

StateIndiana
CountyAllen
Location02.60 S SR 930
CarriesUS 27 NB
CrossesST Marys River
Coordinates41.08368, -85.13580

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length312.7 ft (95.3 m)
Max Span84.0 ft (25.6 m)
Deck Width61.4 ft (18.7 m)
Deck Area1782.1 sq m
Main Spans4
Year Built1959 (reconstructed 2023)

Traffic

Avg Daily Traffic20,087 (2019)
Truck Traffic14%
Lanes On Bridge3

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number007490

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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