US Bridges

SR-121 over Usr 127

Fair

Darke County, Ohio · Jct. USR-127 · Structure no. 1902040

Built
1968
57 years old, rebuilt 1988
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
297 ft
4 main spans
Daily traffic
4,307
2015 count
Owner
State
State Highway Agency

About this bridge

SR-121 over Usr 127 is a steel continuous stringer/multi-beam or girder carrying SR-121 over Usr 127 in Darke County, Ohio. It was built in 1968 and reconstructed in 1988, so it is 57 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 4,307 vehicles a day, roughly 1% of them trucks, projected to reach 5,978 by 2035. The structure is 297 ft (90.5 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR-121
CrossesUsr 127
LocationJct. USR-127
RouteState Highway 121
CountyDarke County
StateOhio
Coordinates40.12605, -84.60611
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length297 ft (90.5 m)
Longest span86 ft (26.2 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,307 (2015)
Projected traffic5,978 by 2035
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR-121 over Usr 127 built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1988.

What condition is SR-121 over Usr 127 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-121 over Usr 127 carry?

About 4,307 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is SR-121 over Usr 127?

The structure is 297 ft (90.5 m) long with a longest span of 86 ft (26.2 m) and a deck 37 ft wide.

Who owns SR-121 over Usr 127?

It is owned by the State Highway Agency.