US Bridges

SR-121 over Greenville Creek

Good

Darke County, Ohio · .63MI.E.OF Jct. SR-49 · Structure no. 1902016

Built
1934
91 years old, rebuilt 1979
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
123 ft
3 main spans
Daily traffic
12,951
2015 count
Owner
State
State Highway Agency

About this bridge

SR-121 over Greenville Creek is a prestressed concrete box beam or girders - multiple carrying SR-121 over Greenville Creek in Darke County, Ohio. It was built in 1934 and reconstructed in 1979, so it is 91 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,951 vehicles a day, roughly 2% of them trucks, projected to reach 17,976 by 2035. The structure is 123 ft (37.5 m) long and 63 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSR-121
CrossesGreenville Creek
Location.63MI.E.OF Jct. SR-49
RouteState Highway 121
StateOhio
Coordinates40.10853, -84.62412
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating63.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length123 ft (37.5 m)
Longest span45 ft (13.7 m)
Deck width63 ft (19.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,951 (2015)
Projected traffic17,976 by 2035
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-121 over Greenville Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1979.

What condition is SR-121 over Greenville Creek 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 July 2023.

How much traffic does SR-121 over Greenville Creek carry?

About 12,951 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is SR-121 over Greenville Creek?

The structure is 123 ft (37.5 m) long with a longest span of 45 ft (13.7 m) and a deck 63 ft wide.

Who owns SR-121 over Greenville Creek?

It is owned by the State Highway Agency.