US Bridges

SR 145 over Flag Run

Fair

Noble County, Ohio · 2.12M S Monroe Co. Line · Structure no. 6101984

Built
1929
96 years old
Condition
Fair
inspected October 2024
Type
Girder and Floorbeam System
Concrete
Length
52 ft
1 main span
Daily traffic
422
2015 count
Owner
State
State Highway Agency

About this bridge

SR 145 over Flag Run is a concrete girder and floorbeam system carrying SR 145 over Flag Run in Noble County, Ohio. It was built in 1929, so it is 96 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 5 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 422 vehicles a day, roughly 10% of them trucks, projected to reach 586 by 2035. The structure is 52 ft (15.9 m) long and 29 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesSR 145
CrossesFlag Run
Location2.12M S Monroe Co. Line
RouteState Highway 145
CountyNoble County
StateOhio
Coordinates39.68566, -81.30526
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating25 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length52 ft (15.9 m)
Longest span50 ft (15.2 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic422 (2015)
Projected traffic586 by 2035
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 145 over Flag Run built?

It was built in 1929, making it 96 years old in 2025.

What condition is SR 145 over Flag 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 October 2024.

How much traffic does SR 145 over Flag Run carry?

About 422 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is SR 145 over Flag Run?

The structure is 52 ft (15.9 m) long with a longest span of 50 ft (15.2 m) and a deck 29 ft wide.

Who owns SR 145 over Flag Run?

It is owned by the State Highway Agency.