US Bridges

Mercer Road over Eight Mile Creek

Good

Mercer County, Ohio · .2 Mi. E. Neptune Mendon · Structure no. 5456215

Built
1997
28 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
79 ft
1 main span
Daily traffic
187
2015 count
Owner
County
County Highway Agency

About this bridge

Mercer Road over Eight Mile Creek is a prestressed concrete box beam or girders - multiple carrying Mercer Road over Eight Mile Creek in Mercer County, Ohio. It was built in 1997, so it is 28 years old, younger 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 187 vehicles a day, roughly 7% of them trucks, projected to reach 260 by 2035. The structure is 79 ft (24.1 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMercer Road
CrossesEight Mile Creek
Location.2 Mi. E. Neptune Mendon
RouteCounty Highway C0210
StateOhio
Coordinates40.65529, -84.48554
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating64.3 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span78 ft (23.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic187 (2015)
Projected traffic260 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Mercer Road over Eight Mile Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Mercer Road over Eight Mile Creek 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 December 2024.

How much traffic does Mercer Road over Eight Mile Creek carry?

About 187 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is Mercer Road over Eight Mile Creek?

The structure is 79 ft (24.1 m) long with a longest span of 78 ft (23.8 m) and a deck 28 ft wide.

Who owns Mercer Road over Eight Mile Creek?

It is owned by the County Highway Agency.