Structure 2507579 · Franklin County, OH

Ir 71 SB over Unr Ir70 & Ovr Sr315

Carries Ir 71 SB over Unr Ir70 & Ovr Sr315, 4.51 Mi N Of I270.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT580 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 8/9Substructure 5/9 · sets the rating

580 ft end to end, longest span 124 ft: about 1.6 football fields. 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.

Built197551 years old
Length579.7 ft176.7 m
Daily traffic—reported figure implausible
Last inspectedSeptember 2024every 12 months

Location

StateOhio
CountyFranklin
Location4.51 Mi N Of I270
CarriesIr 71 SB
CrossesUnr Ir70 & Ovr Sr315
Coordinates39.94906, -83.01649

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length579.7 ft (176.7 m)
Max Span124.0 ft (37.8 m)
Deck Width33.1 ft (10.1 m)
Deck Area1784.7 sq m
Main Spans6
Year Built1975

Traffic

Avg Daily Traffic75,685 (2001)
That is about 75,685 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic10%
Lanes On Bridge1
Lanes Under Bridge6

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number2507579

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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