US Bridges

Palmer RD over ST Marys River

Good

Mercer County, Ohio · N of SR707 0.8 MI · Structure no. 5454698

Built
2024
1 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
141 ft
1 main span
Daily traffic
220
2015 count
Owner
County
County Highway Agency

About this bridge

Palmer RD over ST Marys River is a prestressed concrete box beam or girders - multiple carrying Palmer RD over ST Marys River in Mercer County, Ohio. It was built in 2024, so it is 1 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 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 220 vehicles a day, roughly 8% of them trucks, projected to reach 349 by 2027. The structure is 141 ft (43 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesPalmer RD
CrossesST Marys River
LocationN of SR707 0.8 MI
RouteCounty Highway C125B
StateOhio
Coordinates40.68018, -84.56141
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating37.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1 (+1 approach)
Design loadHL 93
Structure length141 ft (43 m)
Longest span141 ft (43 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2015)
Projected traffic349 by 2027
Trucks8%
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 Palmer RD over ST Marys River built?

It was built in 2024, making it 1 years old in 2025.

What condition is Palmer RD over ST Marys 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 December 2024.

How much traffic does Palmer RD over ST Marys River carry?

About 220 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is Palmer RD over ST Marys River?

The structure is 141 ft (43 m) long with a longest span of 141 ft (43 m) and a deck 32 ft wide.

Who owns Palmer RD over ST Marys River?

It is owned by the County Highway Agency.