US Bridges

SR-721 over Ludlow Creek

Good

Miami County, Ohio · 1.9MI.S. of Jct. SR-55 · Structure no. 5504775

Built
1961
64 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
129 ft
3 main spans
Daily traffic
642
2015 count
Owner
State
State Highway Agency

About this bridge

SR-721 over Ludlow Creek is a steel continuous stringer/multi-beam or girder carrying SR-721 over Ludlow Creek in Miami County, Ohio. It was built in 1961, so it is 64 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 642 vehicles a day, roughly 6% of them trucks, projected to reach 891 by 2035. The structure is 129 ft (39.3 m) long and 36 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSR-721
CrossesLudlow Creek
Location1.9MI.S. of Jct. SR-55
RouteState Highway 721
StateOhio
Coordinates39.97705, -84.41769
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 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 alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length129 ft (39.3 m)
Longest span48 ft (14.6 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic642 (2015)
Projected traffic891 by 2035
Trucks6%
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 Ludlow Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is SR-721 over Ludlow 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 2024.

How much traffic does SR-721 over Ludlow Creek carry?

About 642 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR-721 over Ludlow Creek?

The structure is 129 ft (39.3 m) long with a longest span of 48 ft (14.6 m) and a deck 36 ft wide.

Who owns SR-721 over Ludlow Creek?

It is owned by the State Highway Agency.