US Bridges

County Road 75 over North Fork of Miami Rive

Good

Hardin County, Ohio · .4 MI S of JCT of CR 180 · Structure no. 3331989

Built
1960
65 years old, rebuilt 2019
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
507
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 75 over North Fork of Miami Rive is a steel stringer/multi-beam or girder carrying County Road 75 over North Fork of Miami Rive in Hardin County, Ohio. It was built in 1960 and reconstructed in 2019, so it is 65 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 507 vehicles a day, roughly 7% of them trucks, projected to reach 704 by 2035. The structure is 31 ft (9.4 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Road 75
CrossesNorth Fork of Miami Rive
Location.4 MI S of JCT of CR 180
RouteCounty Highway C0075
CountyHardin County
StateOhio
Coordinates40.57388, -83.75489
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating57.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic507 (2015)
Projected traffic704 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 75 over North Fork of Miami Rive built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2019.

What condition is County Road 75 over North Fork of Miami Rive 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 May 2023.

How much traffic does County Road 75 over North Fork of Miami Rive carry?

About 507 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is County Road 75 over North Fork of Miami Rive?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 24 ft wide.

Who owns County Road 75 over North Fork of Miami Rive?

It is owned by the County Highway Agency.