US Bridges

SR 73 over Flat Run

Fair

Adams County, Ohio · 1.01 MI E of Highland CO · Structure no. 0102466

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
119 ft
3 main spans
Daily traffic
1,515
2022 count
Owner
State
State Highway Agency

About this bridge

SR 73 over Flat Run is a steel continuous stringer/multi-beam or girder carrying SR 73 over Flat Run in Adams County, Ohio. It was built in 1970, so it is 55 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 1,515 vehicles a day, roughly 11% of them trucks, projected to reach 2,067 by 2035. The structure is 119 ft (36.3 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR 73
CrossesFlat Run
Location1.01 MI E of Highland CO
RouteState Highway 73
CountyAdams County
StateOhio
Coordinates39.03239, -83.48179
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 inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length119 ft (36.3 m)
Longest span43 ft (13.1 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,515 (2022)
Projected traffic2,067 by 2035
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 73 over Flat Run built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR 73 over Flat 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 March 2024.

How much traffic does SR 73 over Flat Run carry?

About 1,515 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is SR 73 over Flat Run?

The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13.1 m) and a deck 36 ft wide.

Who owns SR 73 over Flat Run?

It is owned by the State Highway Agency.