US Bridges

SR-721 over Hog Run

Fair

Miami County, Ohio · .61MI.S. of Jct. SR-571 · Structure no. 5504864

Built
1968
57 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
107 ft
3 main spans
Daily traffic
1,189
2015 count
Owner
State
State Highway Agency

About this bridge

SR-721 over Hog Run is a concrete continuous slab carrying SR-721 over Hog Run in Miami County, Ohio. It was built in 1968, 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 1,189 vehicles a day, roughly 3% of them trucks, projected to reach 1,650 by 2035. The structure is 107 ft (32.6 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSR-721
CrossesHog Run
Location.61MI.S. of Jct. SR-571
RouteState Highway 721
CountyMiami County
StateOhio
Coordinates39.99512, -84.41603
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 inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length107 ft (32.6 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,189 (2015)
Projected traffic1,650 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Hog Run built?

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

What condition is SR-721 over Hog Run 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-721 over Hog Run carry?

About 1,189 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is SR-721 over Hog Run?

The structure is 107 ft (32.6 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns SR-721 over Hog Run?

It is owned by the State Highway Agency.