Structure 202274 · Allen County, OH

Ir 75 NB over SR 81

Carries Ir 75 NB over SR 81, 0.43 Mile N. Ottawa River.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT129 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

129 ft end to end. 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.

Built201412 years old
Length128.9 ft39.3 m
Daily traffic16,723counted 2015
Last inspectedNovember 2024every 24 months

Location

StateOhio
CountyAllen
Location0.43 Mile N. Ottawa River
CarriesIr 75 NB
CrossesSR 81
Coordinates40.75576, -84.07544

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length128.9 ft (39.3 m)
Max Span126.0 ft (38.4 m)
Deck Width46.9 ft (14.3 m)
Deck Area562.0 sq m
Main Spans1
Year Built2014

Traffic

Avg Daily Traffic16,723 (2015)
Truck Traffic34%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0202274

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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