US Bridges

SR-47 over Swamp Creek

Fair

Darke County, Ohio · .07MI.E. of Jct. SR-185 · Structure no. 1900722

Built
1922
103 years old, rebuilt 1981
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
88 ft
2 main spans
Daily traffic
3,736
2018 count
Owner
State
State Highway Agency

About this bridge

SR-47 over Swamp Creek is a prestressed concrete continuous box beam or girders - multiple carrying SR-47 over Swamp Creek in Darke County, Ohio. It was built in 1922 and reconstructed in 1981, so it is 103 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 3,736 vehicles a day, roughly 12% of them trucks, projected to reach 5,186 by 2038. The structure is 88 ft (26.8 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSR-47
CrossesSwamp Creek
Location.07MI.E. of Jct. SR-185
RouteState Highway 47
CountyDarke County
StateOhio
Coordinates40.22487, -84.48698
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating39.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length88 ft (26.8 m)
Longest span42 ft (12.8 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,736 (2018)
Projected traffic5,186 by 2038
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Swamp Creek built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1981.

What condition is SR-47 over Swamp 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 July 2024.

How much traffic does SR-47 over Swamp Creek carry?

About 3,736 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is SR-47 over Swamp Creek?

The structure is 88 ft (26.8 m) long with a longest span of 42 ft (12.8 m) and a deck 36 ft wide.

Who owns SR-47 over Swamp Creek?

It is owned by the State Highway Agency.