US Bridges

SR-638 over South Fork Miami River

Good

Logan County, Ohio · .61MI. S. of Jct. SR-273 · Structure no. 4604024

Built
1946
79 years old, rebuilt 1992
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
122 ft
3 main spans
Daily traffic
1,544
2015 count
Owner
State
State Highway Agency

About this bridge

SR-638 over South Fork Miami River is a steel continuous stringer/multi-beam or girder carrying SR-638 over South Fork Miami River in Logan County, Ohio. It was built in 1946 and reconstructed in 1992, so it is 79 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 1,544 vehicles a day, roughly 3% of them trucks, projected to reach 2,143 by 2035. The structure is 122 ft (37.2 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSR-638
CrossesSouth Fork Miami River
Location.61MI. S. of Jct. SR-273
RouteState Highway 638
StateOhio
Coordinates40.49545, -83.7423
Functional classRural Minor 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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length122 ft (37.2 m)
Longest span45 ft (13.7 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,544 (2015)
Projected traffic2,143 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$331,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-638 over South Fork Miami River built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1992.

What condition is SR-638 over South Fork 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 February 2024.

How much traffic does SR-638 over South Fork Miami River carry?

About 1,544 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is SR-638 over South Fork Miami River?

The structure is 122 ft (37.2 m) long with a longest span of 45 ft (13.7 m) and a deck 36 ft wide.

Who owns SR-638 over South Fork Miami River?

It is owned by the State Highway Agency.