US Bridges

SR 343 over Little Miami River

Good

Greene County, Ohio · 3 MI E of JCT US 68 · Structure no. 2902303

Built
1934
91 years old, rebuilt 1992
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
86 ft
1 main span
Daily traffic
1,761
2015 count
Owner
State
State Highway Agency

About this bridge

SR 343 over Little Miami River is a prestressed concrete box beam or girders - multiple carrying SR 343 over Little Miami River in Greene County, Ohio. It was built in 1934 and reconstructed in 1992, so it is 91 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 1,761 vehicles a day, roughly 7% of them trucks, projected to reach 2,444 by 2035. The structure is 86 ft (26.2 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSR 343
CrossesLittle Miami River
Location3 MI E of JCT US 68
RouteState Highway 343
StateOhio
Coordinates39.79893, -83.83211
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating37.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length86 ft (26.2 m)
Longest span81 ft (24.7 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,761 (2015)
Projected traffic2,444 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 343 over Little Miami River built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1992.

What condition is SR 343 over Little Miami River 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 March 2024.

How much traffic does SR 343 over Little Miami River carry?

About 1,761 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is SR 343 over Little Miami River?

The structure is 86 ft (26.2 m) long with a longest span of 81 ft (24.7 m) and a deck 32 ft wide.

Who owns SR 343 over Little Miami River?

It is owned by the State Highway Agency.