US Bridges

SR 730 over Cowan Creek

Good

Clinton County, Ohio · 0.81 MI N of SR 350 · Structure no. 1403966

Built
1953
72 years old, rebuilt 2005
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
188 ft
3 main spans
Daily traffic
2,481
2015 count
Owner
State
State Highway Agency

About this bridge

SR 730 over Cowan Creek is a steel continuous stringer/multi-beam or girder carrying SR 730 over Cowan Creek in Clinton County, Ohio. It was built in 1953 and reconstructed in 2005, so it is 72 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 2,481 vehicles a day, roughly 4% of them trucks, projected to reach 3,444 by 2035. The structure is 188 ft (57.3 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSR 730
CrossesCowan Creek
Location0.81 MI N of SR 350
RouteState Highway 730
CountyClinton County
StateOhio
Coordinates39.38899, -83.92653
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 protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length188 ft (57.3 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,481 (2015)
Projected traffic3,444 by 2035
Trucks4%
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 730 over Cowan Creek built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 2005.

What condition is SR 730 over Cowan 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 730 over Cowan Creek carry?

About 2,481 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is SR 730 over Cowan Creek?

The structure is 188 ft (57.3 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns SR 730 over Cowan Creek?

It is owned by the State Highway Agency.