US Bridges

Township Road 946 over Onion Creek

FairPosted for load

Morgan County, Ohio · 500 Ft South TR-234 · Structure no. 5831687

Built
1954
71 years old
Condition
Fair
inspected March 2024
Type
Girder and Floorbeam System
Steel
Length
32 ft
1 main span
Daily traffic
209
2015 count
Owner
County
County Highway Agency

About this bridge

Township Road 946 over Onion Creek is a steel girder and floorbeam system carrying Township Road 946 over Onion Creek in Morgan County, Ohio. It was built in 1954, so it is 71 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. Its operating status is: posted for load restriction.

It carries about 209 vehicles a day, roughly 7% of them trucks, projected to reach 290 by 2042. The structure is 32 ft (9.8 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTownship Road 946
CrossesOnion Creek
Location500 Ft South TR-234
RouteCounty Highway 946
CountyMorgan County
StateOhio
Coordinates39.63167, -81.69833
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating7.2 US tons
Inventory rating3.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width15 ft (4.6 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic209 (2015)
Projected traffic290 by 2042
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Township Road 946 over Onion Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Township Road 946 over Onion Creek 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 Township Road 946 over Onion Creek carry?

About 209 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is Township Road 946 over Onion Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 15 ft wide.

Who owns Township Road 946 over Onion Creek?

It is owned by the County Highway Agency.