US Bridges

18th St. over IR-70

Good

Franklin County, Ohio · 0.96 MI E of US23 · Structure no. 2504839

Built
1965
60 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
278 ft
4 main spans
Daily traffic
6,087
2017 count
Owner
State
State Highway Agency

About this bridge

18th St. over IR-70 is a steel continuous stringer/multi-beam or girder carrying 18th St. over IR-70 in Franklin County, Ohio. It was built in 1965, so it is 60 years old, older than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,087 vehicles a day, roughly 4% of them trucks, projected to reach 8,449 by 2037. The structure is 278 ft (84.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries18th St.
CrossesIR-70
Location0.96 MI E of US23
RouteCity Street 1766
CountyFranklin County
StateOhio
Coordinates39.95411, -82.97642
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length278 ft (84.7 m)
Longest span81 ft (24.6 m)
Deck width56 ft (17.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,087 (2017)
Projected traffic8,449 by 2037
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 18th St. over IR-70 built?

It was built in 1965, making it 60 years old in 2025.

What condition is 18th St. over IR-70 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does 18th St. over IR-70 carry?

About 6,087 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is 18th St. over IR-70?

The structure is 278 ft (84.7 m) long with a longest span of 81 ft (24.6 m) and a deck 56 ft wide.

Who owns 18th St. over IR-70?

It is owned by the State Highway Agency.