US Bridges

SR-707 over Big Black Creek

Fair

Mercer County, Ohio · 2.08MI.E.OF Jct. SR-49 · Structure no. 5403960

Built
1961
64 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
88 ft
3 main spans
Daily traffic
845
2015 count
Owner
State
State Highway Agency

About this bridge

SR-707 over Big Black Creek is a concrete continuous slab carrying SR-707 over Big Black Creek in Mercer County, Ohio. It was built in 1961, so it is 64 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 845 vehicles a day, roughly 21% of them trucks, projected to reach 1,173 by 2035. The structure is 88 ft (26.8 m) long and 36 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesSR-707
CrossesBig Black Creek
Location2.08MI.E.OF Jct. SR-49
RouteState Highway 707
CountyMercer County
StateOhio
Coordinates40.65505, -84.74572
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.2 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length88 ft (26.8 m)
Longest span33 ft (10.1 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic845 (2015)
Projected traffic1,173 by 2035
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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-707 over Big Black Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is SR-707 over Big Black 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 August 2024.

How much traffic does SR-707 over Big Black Creek carry?

About 845 vehicles per day (2015 count), of which roughly 21% are trucks.

How long is SR-707 over Big Black Creek?

The structure is 88 ft (26.8 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns SR-707 over Big Black Creek?

It is owned by the State Highway Agency.