Structure 2503840 · Franklin County, OH

I 70 over Hamilton Ditch

Carries I 70 over Hamilton Ditch, 3.29 Mi E Of Madison Co..

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT60 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

60 ft end to end, longest span 23 ft. 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 slab bridge.

Built197056 years old
Length60.0 ft18.3 m
Daily traffic33,202counted 2015
Last inspectedJune 2023every 24 months

Location

StateOhio
CountyFranklin
Location3.29 Mi E Of Madison Co.
CarriesI 70
CrossesHamilton Ditch
Coordinates39.97909, -83.18736

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length60.0 ft (18.3 m)
Max Span22.6 ft (6.9 m)
Deck Width54.1 ft (16.5 m)
Deck Area301.9 sq m
Main Spans3
Year Built1970

Traffic

Avg Daily Traffic33,202 (2015)
Truck Traffic15%
Lanes On Bridge3

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number2503840

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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