US Bridges

State Route 546 over Markley Run

Good

Knox County, Ohio · 100 S of Rich CO Line · Structure no. 4203402

Built
2009
16 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
1,982
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 546 over Markley Run is a concrete slab carrying State Route 546 over Markley Run in Knox County, Ohio. It was built in 2009, so it is 16 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,982 vehicles a day, roughly 7% of them trucks, projected to reach 2,751 by 2035. The structure is 31 ft (9.6 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesState Route 546
CrossesMarkley Run
Location100 S of Rich CO Line
RouteState Highway 546
CountyKnox County
StateOhio
Coordinates40.5497, -82.56093
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length31 ft (9.6 m)
Longest span30 ft (9.1 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,982 (2015)
Projected traffic2,751 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 State Route 546 over Markley Run built?

It was built in 2009, making it 16 years old in 2025.

What condition is State Route 546 over Markley Run 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 March 2024.

How much traffic does State Route 546 over Markley Run carry?

About 1,982 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is State Route 546 over Markley Run?

The structure is 31 ft (9.6 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.

Who owns State Route 546 over Markley Run?

It is owned by the State Highway Agency.