US Bridges

SR-721 over Ballinger Run

Good

Darke County, Ohio · 1.5MI.N. of Jct. USR-36 · Structure no. 1904213

Built
1985
40 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
4,314
2015 count
Owner
State
State Highway Agency

About this bridge

SR-721 over Ballinger Run is a steel stringer/multi-beam or girder carrying SR-721 over Ballinger Run in Darke County, Ohio. It was built in 1985, so it is 40 years old, younger 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 4,314 vehicles a day, roughly 3% of them trucks, projected to reach 5,988 by 2035. The structure is 57 ft (17.4 m) long and 44 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesSR-721
CrossesBallinger Run
Location1.5MI.N. of Jct. USR-36
RouteState Highway 721
CountyDarke County
StateOhio
Coordinates40.13649, -84.43106
Functional classRural Major Collector

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment9: Superior to present desirable criteria
Operating rating53.6 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width44 ft (13.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,314 (2015)
Projected traffic5,988 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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-721 over Ballinger Run built?

It was built in 1985, making it 40 years old in 2025.

What condition is SR-721 over Ballinger Run 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 May 2023.

How much traffic does SR-721 over Ballinger Run carry?

About 4,314 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is SR-721 over Ballinger Run?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns SR-721 over Ballinger Run?

It is owned by the State Highway Agency.