US Bridges

SR-47 over Grays Branch

Fair

Darke County, Ohio · 3.16MI.E. of State Line · Structure no. 1900366

Built
1945
80 years old, rebuilt 1984
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
1,895
2015 count
Owner
State
State Highway Agency

About this bridge

SR-47 over Grays Branch is a concrete slab carrying SR-47 over Grays Branch in Darke County, Ohio. It was built in 1945 and reconstructed in 1984, so it is 80 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 1,895 vehicles a day, roughly 16% of them trucks, projected to reach 2,630 by 2035. The structure is 30 ft (9.1 m) long and 32 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSR-47
CrossesGrays Branch
Location3.16MI.E. of State Line
RouteState Highway 47
CountyDarke County
StateOhio
Coordinates40.223, -84.77354
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 protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating82.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length30 ft (9.1 m)
Longest span27 ft (8.2 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,895 (2015)
Projected traffic2,630 by 2035
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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-47 over Grays Branch built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1984.

What condition is SR-47 over Grays Branch 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-47 over Grays Branch carry?

About 1,895 vehicles per day (2015 count), of which roughly 16% are trucks.

How long is SR-47 over Grays Branch?

The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.2 m) and a deck 32 ft wide.

Who owns SR-47 over Grays Branch?

It is owned by the State Highway Agency.