US Bridges

SR 309 over Tymochtee Creek

Fair

Marion County, Ohio · 7.54 MI E of SR37 · Structure no. 5101514

Built
1983
42 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
2,002
2015 count
Owner
State
State Highway Agency

About this bridge

SR 309 over Tymochtee Creek is a prestressed concrete box beam or girders - multiple carrying SR 309 over Tymochtee Creek in Marion County, Ohio. It was built in 1983, so it is 42 years old, younger than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,002 vehicles a day, roughly 18% of them trucks, projected to reach 2,779 by 2035. The structure is 39 ft (11.9 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesSR 309
CrossesTymochtee Creek
Location7.54 MI E of SR37
RouteState Highway 309
CountyMarion County
StateOhio
Coordinates40.62218, -83.24834
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length39 ft (11.9 m)
Longest span37 ft (11.4 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,002 (2015)
Projected traffic2,779 by 2035
Trucks18%
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 309 over Tymochtee Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR 309 over Tymochtee Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does SR 309 over Tymochtee Creek carry?

About 2,002 vehicles per day (2015 count), of which roughly 18% are trucks.

How long is SR 309 over Tymochtee Creek?

The structure is 39 ft (11.9 m) long with a longest span of 37 ft (11.4 m) and a deck 32 ft wide.

Who owns SR 309 over Tymochtee Creek?

It is owned by the State Highway Agency.