US Bridges

SR 229 over Branch of Armstrong Run

Fair

Knox County, Ohio · 4.44 MI E.Of Mrw CO Line · Structure no. 4202864

Built
1996
29 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
3,623
2015 count
Owner
State
State Highway Agency

About this bridge

SR 229 over Branch of Armstrong Run is a prestressed concrete box beam or girders - multiple carrying SR 229 over Branch of Armstrong Run in Knox County, Ohio. It was built in 1996, so it is 29 years old, younger 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 3,623 vehicles a day, roughly 8% of them trucks, projected to reach 5,029 by 2035. The structure is 56 ft (17.1 m) long and 32 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesSR 229
CrossesBranch of Armstrong Run
Location4.44 MI E.Of Mrw CO Line
RouteState Highway 229
CountyKnox County
StateOhio
Coordinates40.40225, -82.55863
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.
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 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 rating57.9 US tons
Inventory rating44.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length56 ft (17.1 m)
Longest span55 ft (16.8 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,623 (2015)
Projected traffic5,029 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 229 over Branch of Armstrong Run built?

It was built in 1996, making it 29 years old in 2025.

What condition is SR 229 over Branch of Armstrong 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 229 over Branch of Armstrong Run carry?

About 3,623 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is SR 229 over Branch of Armstrong Run?

The structure is 56 ft (17.1 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.

Who owns SR 229 over Branch of Armstrong Run?

It is owned by the State Highway Agency.