US Bridges

County Road 100 B over Rock Swale

Fair

Marion County, Ohio · .75 Mi. W. of Jct. CR 101 · Structure no. 5136431

Built
2006
19 years old
Condition
Fair
inspected September 2024
Type
Frame
Concrete
Length
30 ft
1 main span
Daily traffic
457
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 100 B over Rock Swale is a concrete frame carrying County Road 100 B over Rock Swale in Marion County, Ohio. It was built in 2006, so it is 19 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 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 457 vehicles a day, roughly 7% of them trucks, projected to reach 634 by 2035. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road 100 B
CrossesRock Swale
Location.75 Mi. W. of Jct. CR 101
RouteCounty Highway C100B
CountyMarion County
StateOhio
Coordinates40.57167, -83.22556
Functional classRural Local

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.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating42.9 US tons
Inventory rating25 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic457 (2015)
Projected traffic634 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 100 B over Rock Swale built?

It was built in 2006, making it 19 years old in 2025.

What condition is County Road 100 B over Rock Swale 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 September 2024.

How much traffic does County Road 100 B over Rock Swale carry?

About 457 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is County Road 100 B over Rock Swale?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns County Road 100 B over Rock Swale?

It is owned by the County Highway Agency.