US Bridges

SR 307 over Mill Creek

Fair

Ashtabula County, Ohio · 1.74 MI W of SR 46 · Structure no. 0405884

Built
1932
93 years old, rebuilt 1990
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
151 ft
3 main spans
Daily traffic
4,932
2015 count
Owner
State
State Highway Agency

About this bridge

SR 307 over Mill Creek is a steel continuous stringer/multi-beam or girder carrying SR 307 over Mill Creek in Ashtabula County, Ohio. It was built in 1932 and reconstructed in 1990, so it is 93 years old, older 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 4,932 vehicles a day, roughly 6% of them trucks, projected to reach 6,846 by 2035. The structure is 151 ft (46 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesSR 307
CrossesMill Creek
Location1.74 MI W of SR 46
RouteState Highway 307
CountyAshtabula County
StateOhio
Coordinates41.75317, -80.8007
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length151 ft (46 m)
Longest span49 ft (14.9 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,932 (2015)
Projected traffic6,846 by 2035
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 307 over Mill Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1990.

What condition is SR 307 over Mill 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 July 2024.

How much traffic does SR 307 over Mill Creek carry?

About 4,932 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR 307 over Mill Creek?

The structure is 151 ft (46 m) long with a longest span of 49 ft (14.9 m) and a deck 36 ft wide.

Who owns SR 307 over Mill Creek?

It is owned by the State Highway Agency.